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![Bartosz Golaszewski](/assets/img/avatar_default.png)
Uwe Kleine-König pointed out we still have one resource leak in the mvebu
driver triggered on driver detach. Let's address it with a custom devm
action.
Fixes: 812d47889a
("gpio/mvebu: Use irq_domain_add_linear")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
1318 lines
34 KiB
C
1318 lines
34 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* GPIO driver for Marvell SoCs
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*
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* Copyright (C) 2012 Marvell
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*
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* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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* Andrew Lunn <andrew@lunn.ch>
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* Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
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*
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* This driver is a fairly straightforward GPIO driver for the
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* complete family of Marvell EBU SoC platforms (Orion, Dove,
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* Kirkwood, Discovery, Armada 370/XP). The only complexity of this
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* driver is the different register layout that exists between the
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* non-SMP platforms (Orion, Dove, Kirkwood, Armada 370) and the SMP
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* platforms (MV78200 from the Discovery family and the Armada
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* XP). Therefore, this driver handles three variants of the GPIO
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* block:
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* - the basic variant, called "orion-gpio", with the simplest
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* register set. Used on Orion, Dove, Kirkwoord, Armada 370 and
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* non-SMP Discovery systems
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* - the mv78200 variant for MV78200 Discovery systems. This variant
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* turns the edge mask and level mask registers into CPU0 edge
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* mask/level mask registers, and adds CPU1 edge mask/level mask
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* registers.
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* - the armadaxp variant for Armada XP systems. This variant keeps
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* the normal cause/edge mask/level mask registers when the global
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* interrupts are used, but adds per-CPU cause/edge mask/level mask
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* registers n a separate memory area for the per-CPU GPIO
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* interrupts.
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*/
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#include <linux/bitops.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/gpio/driver.h>
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#include <linux/gpio/consumer.h>
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#include <linux/gpio/machine.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/irqchip/chained_irq.h>
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#include <linux/irqdomain.h>
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#include <linux/mfd/syscon.h>
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#include <linux/of_device.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/platform_device.h>
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#include <linux/pwm.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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/*
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* GPIO unit register offsets.
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*/
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#define GPIO_OUT_OFF 0x0000
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#define GPIO_IO_CONF_OFF 0x0004
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#define GPIO_BLINK_EN_OFF 0x0008
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#define GPIO_IN_POL_OFF 0x000c
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#define GPIO_DATA_IN_OFF 0x0010
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#define GPIO_EDGE_CAUSE_OFF 0x0014
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#define GPIO_EDGE_MASK_OFF 0x0018
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#define GPIO_LEVEL_MASK_OFF 0x001c
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#define GPIO_BLINK_CNT_SELECT_OFF 0x0020
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/*
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* PWM register offsets.
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*/
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#define PWM_BLINK_ON_DURATION_OFF 0x0
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#define PWM_BLINK_OFF_DURATION_OFF 0x4
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#define PWM_BLINK_COUNTER_B_OFF 0x8
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/* Armada 8k variant gpios register offsets */
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#define AP80X_GPIO0_OFF_A8K 0x1040
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#define CP11X_GPIO0_OFF_A8K 0x100
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#define CP11X_GPIO1_OFF_A8K 0x140
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/* The MV78200 has per-CPU registers for edge mask and level mask */
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#define GPIO_EDGE_MASK_MV78200_OFF(cpu) ((cpu) ? 0x30 : 0x18)
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#define GPIO_LEVEL_MASK_MV78200_OFF(cpu) ((cpu) ? 0x34 : 0x1C)
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/*
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* The Armada XP has per-CPU registers for interrupt cause, interrupt
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* mask and interrupt level mask. Those are in percpu_regs range.
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*/
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#define GPIO_EDGE_CAUSE_ARMADAXP_OFF(cpu) ((cpu) * 0x4)
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#define GPIO_EDGE_MASK_ARMADAXP_OFF(cpu) (0x10 + (cpu) * 0x4)
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#define GPIO_LEVEL_MASK_ARMADAXP_OFF(cpu) (0x20 + (cpu) * 0x4)
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#define MVEBU_GPIO_SOC_VARIANT_ORION 0x1
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#define MVEBU_GPIO_SOC_VARIANT_MV78200 0x2
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#define MVEBU_GPIO_SOC_VARIANT_ARMADAXP 0x3
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#define MVEBU_GPIO_SOC_VARIANT_A8K 0x4
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#define MVEBU_MAX_GPIO_PER_BANK 32
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struct mvebu_pwm {
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struct regmap *regs;
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u32 offset;
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unsigned long clk_rate;
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struct gpio_desc *gpiod;
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struct pwm_chip chip;
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spinlock_t lock;
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struct mvebu_gpio_chip *mvchip;
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/* Used to preserve GPIO/PWM registers across suspend/resume */
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u32 blink_select;
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u32 blink_on_duration;
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u32 blink_off_duration;
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};
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struct mvebu_gpio_chip {
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struct gpio_chip chip;
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struct regmap *regs;
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u32 offset;
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struct regmap *percpu_regs;
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int irqbase;
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struct irq_domain *domain;
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int soc_variant;
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/* Used for PWM support */
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struct clk *clk;
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struct mvebu_pwm *mvpwm;
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/* Used to preserve GPIO registers across suspend/resume */
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u32 out_reg;
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u32 io_conf_reg;
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u32 blink_en_reg;
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u32 in_pol_reg;
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u32 edge_mask_regs[4];
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u32 level_mask_regs[4];
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};
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/*
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* Functions returning addresses of individual registers for a given
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* GPIO controller.
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*/
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static void mvebu_gpioreg_edge_cause(struct mvebu_gpio_chip *mvchip,
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struct regmap **map, unsigned int *offset)
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{
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int cpu;
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switch (mvchip->soc_variant) {
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case MVEBU_GPIO_SOC_VARIANT_ORION:
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case MVEBU_GPIO_SOC_VARIANT_MV78200:
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case MVEBU_GPIO_SOC_VARIANT_A8K:
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*map = mvchip->regs;
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*offset = GPIO_EDGE_CAUSE_OFF + mvchip->offset;
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break;
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case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
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cpu = smp_processor_id();
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*map = mvchip->percpu_regs;
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*offset = GPIO_EDGE_CAUSE_ARMADAXP_OFF(cpu);
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break;
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default:
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BUG();
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}
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}
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static u32
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mvebu_gpio_read_edge_cause(struct mvebu_gpio_chip *mvchip)
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{
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struct regmap *map;
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unsigned int offset;
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u32 val;
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mvebu_gpioreg_edge_cause(mvchip, &map, &offset);
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regmap_read(map, offset, &val);
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return val;
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}
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static void
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mvebu_gpio_write_edge_cause(struct mvebu_gpio_chip *mvchip, u32 val)
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{
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struct regmap *map;
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unsigned int offset;
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mvebu_gpioreg_edge_cause(mvchip, &map, &offset);
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regmap_write(map, offset, val);
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}
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static inline void
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mvebu_gpioreg_edge_mask(struct mvebu_gpio_chip *mvchip,
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struct regmap **map, unsigned int *offset)
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{
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int cpu;
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switch (mvchip->soc_variant) {
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case MVEBU_GPIO_SOC_VARIANT_ORION:
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case MVEBU_GPIO_SOC_VARIANT_A8K:
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*map = mvchip->regs;
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*offset = GPIO_EDGE_MASK_OFF + mvchip->offset;
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break;
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case MVEBU_GPIO_SOC_VARIANT_MV78200:
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cpu = smp_processor_id();
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*map = mvchip->regs;
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*offset = GPIO_EDGE_MASK_MV78200_OFF(cpu);
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break;
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case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
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cpu = smp_processor_id();
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*map = mvchip->percpu_regs;
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*offset = GPIO_EDGE_MASK_ARMADAXP_OFF(cpu);
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break;
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default:
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BUG();
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}
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}
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static u32
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mvebu_gpio_read_edge_mask(struct mvebu_gpio_chip *mvchip)
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{
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struct regmap *map;
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unsigned int offset;
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u32 val;
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mvebu_gpioreg_edge_mask(mvchip, &map, &offset);
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regmap_read(map, offset, &val);
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return val;
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}
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static void
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mvebu_gpio_write_edge_mask(struct mvebu_gpio_chip *mvchip, u32 val)
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{
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struct regmap *map;
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unsigned int offset;
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mvebu_gpioreg_edge_mask(mvchip, &map, &offset);
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regmap_write(map, offset, val);
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}
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static void
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mvebu_gpioreg_level_mask(struct mvebu_gpio_chip *mvchip,
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struct regmap **map, unsigned int *offset)
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{
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int cpu;
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switch (mvchip->soc_variant) {
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case MVEBU_GPIO_SOC_VARIANT_ORION:
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case MVEBU_GPIO_SOC_VARIANT_A8K:
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*map = mvchip->regs;
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*offset = GPIO_LEVEL_MASK_OFF + mvchip->offset;
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break;
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case MVEBU_GPIO_SOC_VARIANT_MV78200:
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cpu = smp_processor_id();
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*map = mvchip->regs;
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*offset = GPIO_LEVEL_MASK_MV78200_OFF(cpu);
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break;
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case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
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cpu = smp_processor_id();
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*map = mvchip->percpu_regs;
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*offset = GPIO_LEVEL_MASK_ARMADAXP_OFF(cpu);
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break;
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default:
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BUG();
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}
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}
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static u32
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mvebu_gpio_read_level_mask(struct mvebu_gpio_chip *mvchip)
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{
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struct regmap *map;
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unsigned int offset;
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u32 val;
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mvebu_gpioreg_level_mask(mvchip, &map, &offset);
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regmap_read(map, offset, &val);
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return val;
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}
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static void
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mvebu_gpio_write_level_mask(struct mvebu_gpio_chip *mvchip, u32 val)
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{
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struct regmap *map;
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unsigned int offset;
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mvebu_gpioreg_level_mask(mvchip, &map, &offset);
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regmap_write(map, offset, val);
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}
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/*
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* Functions returning offsets of individual registers for a given
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* PWM controller.
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*/
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static unsigned int mvebu_pwmreg_blink_on_duration(struct mvebu_pwm *mvpwm)
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{
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return mvpwm->offset + PWM_BLINK_ON_DURATION_OFF;
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}
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static unsigned int mvebu_pwmreg_blink_off_duration(struct mvebu_pwm *mvpwm)
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{
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return mvpwm->offset + PWM_BLINK_OFF_DURATION_OFF;
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}
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/*
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* Functions implementing the gpio_chip methods
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*/
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static void mvebu_gpio_set(struct gpio_chip *chip, unsigned int pin, int value)
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{
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struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
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regmap_update_bits(mvchip->regs, GPIO_OUT_OFF + mvchip->offset,
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BIT(pin), value ? BIT(pin) : 0);
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}
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static int mvebu_gpio_get(struct gpio_chip *chip, unsigned int pin)
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{
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struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
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u32 u;
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regmap_read(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset, &u);
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if (u & BIT(pin)) {
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u32 data_in, in_pol;
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regmap_read(mvchip->regs, GPIO_DATA_IN_OFF + mvchip->offset,
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&data_in);
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regmap_read(mvchip->regs, GPIO_IN_POL_OFF + mvchip->offset,
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&in_pol);
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u = data_in ^ in_pol;
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} else {
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regmap_read(mvchip->regs, GPIO_OUT_OFF + mvchip->offset, &u);
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}
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return (u >> pin) & 1;
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}
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static void mvebu_gpio_blink(struct gpio_chip *chip, unsigned int pin,
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int value)
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{
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struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
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regmap_update_bits(mvchip->regs, GPIO_BLINK_EN_OFF + mvchip->offset,
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BIT(pin), value ? BIT(pin) : 0);
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}
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static int mvebu_gpio_direction_input(struct gpio_chip *chip, unsigned int pin)
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{
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struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
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int ret;
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/*
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* Check with the pinctrl driver whether this pin is usable as
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* an input GPIO
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*/
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ret = pinctrl_gpio_direction_input(chip->base + pin);
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if (ret)
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return ret;
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regmap_update_bits(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset,
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BIT(pin), BIT(pin));
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return 0;
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}
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static int mvebu_gpio_direction_output(struct gpio_chip *chip, unsigned int pin,
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int value)
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{
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struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
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int ret;
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/*
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* Check with the pinctrl driver whether this pin is usable as
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* an output GPIO
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*/
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ret = pinctrl_gpio_direction_output(chip->base + pin);
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if (ret)
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return ret;
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mvebu_gpio_blink(chip, pin, 0);
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mvebu_gpio_set(chip, pin, value);
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regmap_update_bits(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset,
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BIT(pin), 0);
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return 0;
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}
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static int mvebu_gpio_get_direction(struct gpio_chip *chip, unsigned int pin)
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{
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struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
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u32 u;
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regmap_read(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset, &u);
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if (u & BIT(pin))
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return GPIO_LINE_DIRECTION_IN;
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return GPIO_LINE_DIRECTION_OUT;
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}
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static int mvebu_gpio_to_irq(struct gpio_chip *chip, unsigned int pin)
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{
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struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
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return irq_create_mapping(mvchip->domain, pin);
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}
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/*
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* Functions implementing the irq_chip methods
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*/
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static void mvebu_gpio_irq_ack(struct irq_data *d)
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{
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struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
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struct mvebu_gpio_chip *mvchip = gc->private;
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u32 mask = d->mask;
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irq_gc_lock(gc);
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mvebu_gpio_write_edge_cause(mvchip, ~mask);
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irq_gc_unlock(gc);
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}
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static void mvebu_gpio_edge_irq_mask(struct irq_data *d)
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{
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struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
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struct mvebu_gpio_chip *mvchip = gc->private;
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struct irq_chip_type *ct = irq_data_get_chip_type(d);
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u32 mask = d->mask;
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irq_gc_lock(gc);
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ct->mask_cache_priv &= ~mask;
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mvebu_gpio_write_edge_mask(mvchip, ct->mask_cache_priv);
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irq_gc_unlock(gc);
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}
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static void mvebu_gpio_edge_irq_unmask(struct irq_data *d)
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{
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struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
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struct mvebu_gpio_chip *mvchip = gc->private;
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struct irq_chip_type *ct = irq_data_get_chip_type(d);
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u32 mask = d->mask;
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irq_gc_lock(gc);
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mvebu_gpio_write_edge_cause(mvchip, ~mask);
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ct->mask_cache_priv |= mask;
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mvebu_gpio_write_edge_mask(mvchip, ct->mask_cache_priv);
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irq_gc_unlock(gc);
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}
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static void mvebu_gpio_level_irq_mask(struct irq_data *d)
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{
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struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
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struct mvebu_gpio_chip *mvchip = gc->private;
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struct irq_chip_type *ct = irq_data_get_chip_type(d);
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u32 mask = d->mask;
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irq_gc_lock(gc);
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ct->mask_cache_priv &= ~mask;
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mvebu_gpio_write_level_mask(mvchip, ct->mask_cache_priv);
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irq_gc_unlock(gc);
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}
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static void mvebu_gpio_level_irq_unmask(struct irq_data *d)
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{
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struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
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struct mvebu_gpio_chip *mvchip = gc->private;
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struct irq_chip_type *ct = irq_data_get_chip_type(d);
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u32 mask = d->mask;
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irq_gc_lock(gc);
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ct->mask_cache_priv |= mask;
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mvebu_gpio_write_level_mask(mvchip, ct->mask_cache_priv);
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irq_gc_unlock(gc);
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}
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/*****************************************************************************
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* MVEBU GPIO IRQ
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*
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* GPIO_IN_POL register controls whether GPIO_DATA_IN will hold the same
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* value of the line or the opposite value.
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*
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* Level IRQ handlers: DATA_IN is used directly as cause register.
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* Interrupt are masked by LEVEL_MASK registers.
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|
* Edge IRQ handlers: Change in DATA_IN are latched in EDGE_CAUSE.
|
|
* Interrupt are masked by EDGE_MASK registers.
|
|
* Both-edge handlers: Similar to regular Edge handlers, but also swaps
|
|
* the polarity to catch the next line transaction.
|
|
* This is a race condition that might not perfectly
|
|
* work on some use cases.
|
|
*
|
|
* Every eight GPIO lines are grouped (OR'ed) before going up to main
|
|
* cause register.
|
|
*
|
|
* EDGE cause mask
|
|
* data-in /--------| |-----| |----\
|
|
* -----| |----- ---- to main cause reg
|
|
* X \----------------| |----/
|
|
* polarity LEVEL mask
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int mvebu_gpio_irq_set_type(struct irq_data *d, unsigned int type)
|
|
{
|
|
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
|
|
struct irq_chip_type *ct = irq_data_get_chip_type(d);
|
|
struct mvebu_gpio_chip *mvchip = gc->private;
|
|
int pin;
|
|
u32 u;
|
|
|
|
pin = d->hwirq;
|
|
|
|
regmap_read(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset, &u);
|
|
if ((u & BIT(pin)) == 0)
|
|
return -EINVAL;
|
|
|
|
type &= IRQ_TYPE_SENSE_MASK;
|
|
if (type == IRQ_TYPE_NONE)
|
|
return -EINVAL;
|
|
|
|
/* Check if we need to change chip and handler */
|
|
if (!(ct->type & type))
|
|
if (irq_setup_alt_chip(d, type))
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Configure interrupt polarity.
|
|
*/
|
|
switch (type) {
|
|
case IRQ_TYPE_EDGE_RISING:
|
|
case IRQ_TYPE_LEVEL_HIGH:
|
|
regmap_update_bits(mvchip->regs,
|
|
GPIO_IN_POL_OFF + mvchip->offset,
|
|
BIT(pin), 0);
|
|
break;
|
|
case IRQ_TYPE_EDGE_FALLING:
|
|
case IRQ_TYPE_LEVEL_LOW:
|
|
regmap_update_bits(mvchip->regs,
|
|
GPIO_IN_POL_OFF + mvchip->offset,
|
|
BIT(pin), BIT(pin));
|
|
break;
|
|
case IRQ_TYPE_EDGE_BOTH: {
|
|
u32 data_in, in_pol, val;
|
|
|
|
regmap_read(mvchip->regs,
|
|
GPIO_IN_POL_OFF + mvchip->offset, &in_pol);
|
|
regmap_read(mvchip->regs,
|
|
GPIO_DATA_IN_OFF + mvchip->offset, &data_in);
|
|
|
|
/*
|
|
* set initial polarity based on current input level
|
|
*/
|
|
if ((data_in ^ in_pol) & BIT(pin))
|
|
val = BIT(pin); /* falling */
|
|
else
|
|
val = 0; /* raising */
|
|
|
|
regmap_update_bits(mvchip->regs,
|
|
GPIO_IN_POL_OFF + mvchip->offset,
|
|
BIT(pin), val);
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void mvebu_gpio_irq_handler(struct irq_desc *desc)
|
|
{
|
|
struct mvebu_gpio_chip *mvchip = irq_desc_get_handler_data(desc);
|
|
struct irq_chip *chip = irq_desc_get_chip(desc);
|
|
u32 cause, type, data_in, level_mask, edge_cause, edge_mask;
|
|
int i;
|
|
|
|
if (mvchip == NULL)
|
|
return;
|
|
|
|
chained_irq_enter(chip, desc);
|
|
|
|
regmap_read(mvchip->regs, GPIO_DATA_IN_OFF + mvchip->offset, &data_in);
|
|
level_mask = mvebu_gpio_read_level_mask(mvchip);
|
|
edge_cause = mvebu_gpio_read_edge_cause(mvchip);
|
|
edge_mask = mvebu_gpio_read_edge_mask(mvchip);
|
|
|
|
cause = (data_in & level_mask) | (edge_cause & edge_mask);
|
|
|
|
for (i = 0; i < mvchip->chip.ngpio; i++) {
|
|
int irq;
|
|
|
|
irq = irq_find_mapping(mvchip->domain, i);
|
|
|
|
if (!(cause & BIT(i)))
|
|
continue;
|
|
|
|
type = irq_get_trigger_type(irq);
|
|
if ((type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) {
|
|
/* Swap polarity (race with GPIO line) */
|
|
u32 polarity;
|
|
|
|
regmap_read(mvchip->regs,
|
|
GPIO_IN_POL_OFF + mvchip->offset,
|
|
&polarity);
|
|
polarity ^= BIT(i);
|
|
regmap_write(mvchip->regs,
|
|
GPIO_IN_POL_OFF + mvchip->offset,
|
|
polarity);
|
|
}
|
|
|
|
generic_handle_irq(irq);
|
|
}
|
|
|
|
chained_irq_exit(chip, desc);
|
|
}
|
|
|
|
static const struct regmap_config mvebu_gpio_regmap_config = {
|
|
.reg_bits = 32,
|
|
.reg_stride = 4,
|
|
.val_bits = 32,
|
|
.fast_io = true,
|
|
};
|
|
|
|
/*
|
|
* Functions implementing the pwm_chip methods
|
|
*/
|
|
static struct mvebu_pwm *to_mvebu_pwm(struct pwm_chip *chip)
|
|
{
|
|
return container_of(chip, struct mvebu_pwm, chip);
|
|
}
|
|
|
|
static int mvebu_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
|
|
{
|
|
struct mvebu_pwm *mvpwm = to_mvebu_pwm(chip);
|
|
struct mvebu_gpio_chip *mvchip = mvpwm->mvchip;
|
|
struct gpio_desc *desc;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
spin_lock_irqsave(&mvpwm->lock, flags);
|
|
|
|
if (mvpwm->gpiod) {
|
|
ret = -EBUSY;
|
|
} else {
|
|
desc = gpiochip_request_own_desc(&mvchip->chip,
|
|
pwm->hwpwm, "mvebu-pwm",
|
|
GPIO_ACTIVE_HIGH,
|
|
GPIOD_OUT_LOW);
|
|
if (IS_ERR(desc)) {
|
|
ret = PTR_ERR(desc);
|
|
goto out;
|
|
}
|
|
|
|
mvpwm->gpiod = desc;
|
|
}
|
|
out:
|
|
spin_unlock_irqrestore(&mvpwm->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
static void mvebu_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
|
|
{
|
|
struct mvebu_pwm *mvpwm = to_mvebu_pwm(chip);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&mvpwm->lock, flags);
|
|
gpiochip_free_own_desc(mvpwm->gpiod);
|
|
mvpwm->gpiod = NULL;
|
|
spin_unlock_irqrestore(&mvpwm->lock, flags);
|
|
}
|
|
|
|
static int mvebu_pwm_get_state(struct pwm_chip *chip,
|
|
struct pwm_device *pwm,
|
|
struct pwm_state *state)
|
|
{
|
|
|
|
struct mvebu_pwm *mvpwm = to_mvebu_pwm(chip);
|
|
struct mvebu_gpio_chip *mvchip = mvpwm->mvchip;
|
|
unsigned long long val;
|
|
unsigned long flags;
|
|
u32 u;
|
|
|
|
spin_lock_irqsave(&mvpwm->lock, flags);
|
|
|
|
regmap_read(mvpwm->regs, mvebu_pwmreg_blink_on_duration(mvpwm), &u);
|
|
/* Hardware treats zero as 2^32. See mvebu_pwm_apply(). */
|
|
if (u > 0)
|
|
val = u;
|
|
else
|
|
val = UINT_MAX + 1ULL;
|
|
state->duty_cycle = DIV_ROUND_UP_ULL(val * NSEC_PER_SEC,
|
|
mvpwm->clk_rate);
|
|
|
|
regmap_read(mvpwm->regs, mvebu_pwmreg_blink_off_duration(mvpwm), &u);
|
|
/* period = on + off duration */
|
|
if (u > 0)
|
|
val += u;
|
|
else
|
|
val += UINT_MAX + 1ULL;
|
|
state->period = DIV_ROUND_UP_ULL(val * NSEC_PER_SEC, mvpwm->clk_rate);
|
|
|
|
regmap_read(mvchip->regs, GPIO_BLINK_EN_OFF + mvchip->offset, &u);
|
|
if (u)
|
|
state->enabled = true;
|
|
else
|
|
state->enabled = false;
|
|
|
|
spin_unlock_irqrestore(&mvpwm->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mvebu_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
|
|
const struct pwm_state *state)
|
|
{
|
|
struct mvebu_pwm *mvpwm = to_mvebu_pwm(chip);
|
|
struct mvebu_gpio_chip *mvchip = mvpwm->mvchip;
|
|
unsigned long long val;
|
|
unsigned long flags;
|
|
unsigned int on, off;
|
|
|
|
if (state->polarity != PWM_POLARITY_NORMAL)
|
|
return -EINVAL;
|
|
|
|
val = (unsigned long long) mvpwm->clk_rate * state->duty_cycle;
|
|
do_div(val, NSEC_PER_SEC);
|
|
if (val > UINT_MAX + 1ULL)
|
|
return -EINVAL;
|
|
/*
|
|
* Zero on/off values don't work as expected. Experimentation shows
|
|
* that zero value is treated as 2^32. This behavior is not documented.
|
|
*/
|
|
if (val == UINT_MAX + 1ULL)
|
|
on = 0;
|
|
else if (val)
|
|
on = val;
|
|
else
|
|
on = 1;
|
|
|
|
val = (unsigned long long) mvpwm->clk_rate * state->period;
|
|
do_div(val, NSEC_PER_SEC);
|
|
val -= on;
|
|
if (val > UINT_MAX + 1ULL)
|
|
return -EINVAL;
|
|
if (val == UINT_MAX + 1ULL)
|
|
off = 0;
|
|
else if (val)
|
|
off = val;
|
|
else
|
|
off = 1;
|
|
|
|
spin_lock_irqsave(&mvpwm->lock, flags);
|
|
|
|
regmap_write(mvpwm->regs, mvebu_pwmreg_blink_on_duration(mvpwm), on);
|
|
regmap_write(mvpwm->regs, mvebu_pwmreg_blink_off_duration(mvpwm), off);
|
|
if (state->enabled)
|
|
mvebu_gpio_blink(&mvchip->chip, pwm->hwpwm, 1);
|
|
else
|
|
mvebu_gpio_blink(&mvchip->chip, pwm->hwpwm, 0);
|
|
|
|
spin_unlock_irqrestore(&mvpwm->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct pwm_ops mvebu_pwm_ops = {
|
|
.request = mvebu_pwm_request,
|
|
.free = mvebu_pwm_free,
|
|
.get_state = mvebu_pwm_get_state,
|
|
.apply = mvebu_pwm_apply,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static void __maybe_unused mvebu_pwm_suspend(struct mvebu_gpio_chip *mvchip)
|
|
{
|
|
struct mvebu_pwm *mvpwm = mvchip->mvpwm;
|
|
|
|
regmap_read(mvchip->regs, GPIO_BLINK_CNT_SELECT_OFF + mvchip->offset,
|
|
&mvpwm->blink_select);
|
|
regmap_read(mvpwm->regs, mvebu_pwmreg_blink_on_duration(mvpwm),
|
|
&mvpwm->blink_on_duration);
|
|
regmap_read(mvpwm->regs, mvebu_pwmreg_blink_off_duration(mvpwm),
|
|
&mvpwm->blink_off_duration);
|
|
}
|
|
|
|
static void __maybe_unused mvebu_pwm_resume(struct mvebu_gpio_chip *mvchip)
|
|
{
|
|
struct mvebu_pwm *mvpwm = mvchip->mvpwm;
|
|
|
|
regmap_write(mvchip->regs, GPIO_BLINK_CNT_SELECT_OFF + mvchip->offset,
|
|
mvpwm->blink_select);
|
|
regmap_write(mvpwm->regs, mvebu_pwmreg_blink_on_duration(mvpwm),
|
|
mvpwm->blink_on_duration);
|
|
regmap_write(mvpwm->regs, mvebu_pwmreg_blink_off_duration(mvpwm),
|
|
mvpwm->blink_off_duration);
|
|
}
|
|
|
|
static int mvebu_pwm_probe(struct platform_device *pdev,
|
|
struct mvebu_gpio_chip *mvchip,
|
|
int id)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct mvebu_pwm *mvpwm;
|
|
void __iomem *base;
|
|
u32 offset;
|
|
u32 set;
|
|
|
|
if (mvchip->soc_variant == MVEBU_GPIO_SOC_VARIANT_A8K) {
|
|
int ret = of_property_read_u32(dev->of_node,
|
|
"marvell,pwm-offset", &offset);
|
|
if (ret < 0)
|
|
return 0;
|
|
} else {
|
|
/*
|
|
* There are only two sets of PWM configuration registers for
|
|
* all the GPIO lines on those SoCs which this driver reserves
|
|
* for the first two GPIO chips. So if the resource is missing
|
|
* we can't treat it as an error.
|
|
*/
|
|
if (!platform_get_resource_byname(pdev, IORESOURCE_MEM, "pwm"))
|
|
return 0;
|
|
offset = 0;
|
|
}
|
|
|
|
if (IS_ERR(mvchip->clk))
|
|
return PTR_ERR(mvchip->clk);
|
|
|
|
mvpwm = devm_kzalloc(dev, sizeof(struct mvebu_pwm), GFP_KERNEL);
|
|
if (!mvpwm)
|
|
return -ENOMEM;
|
|
mvchip->mvpwm = mvpwm;
|
|
mvpwm->mvchip = mvchip;
|
|
mvpwm->offset = offset;
|
|
|
|
if (mvchip->soc_variant == MVEBU_GPIO_SOC_VARIANT_A8K) {
|
|
mvpwm->regs = mvchip->regs;
|
|
|
|
switch (mvchip->offset) {
|
|
case AP80X_GPIO0_OFF_A8K:
|
|
case CP11X_GPIO0_OFF_A8K:
|
|
/* Blink counter A */
|
|
set = 0;
|
|
break;
|
|
case CP11X_GPIO1_OFF_A8K:
|
|
/* Blink counter B */
|
|
set = U32_MAX;
|
|
mvpwm->offset += PWM_BLINK_COUNTER_B_OFF;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
} else {
|
|
base = devm_platform_ioremap_resource_byname(pdev, "pwm");
|
|
if (IS_ERR(base))
|
|
return PTR_ERR(base);
|
|
|
|
mvpwm->regs = devm_regmap_init_mmio(&pdev->dev, base,
|
|
&mvebu_gpio_regmap_config);
|
|
if (IS_ERR(mvpwm->regs))
|
|
return PTR_ERR(mvpwm->regs);
|
|
|
|
/*
|
|
* Use set A for lines of GPIO chip with id 0, B for GPIO chip
|
|
* with id 1. Don't allow further GPIO chips to be used for PWM.
|
|
*/
|
|
if (id == 0)
|
|
set = 0;
|
|
else if (id == 1)
|
|
set = U32_MAX;
|
|
else
|
|
return -EINVAL;
|
|
}
|
|
|
|
regmap_write(mvchip->regs,
|
|
GPIO_BLINK_CNT_SELECT_OFF + mvchip->offset, set);
|
|
|
|
mvpwm->clk_rate = clk_get_rate(mvchip->clk);
|
|
if (!mvpwm->clk_rate) {
|
|
dev_err(dev, "failed to get clock rate\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
mvpwm->chip.dev = dev;
|
|
mvpwm->chip.ops = &mvebu_pwm_ops;
|
|
mvpwm->chip.npwm = mvchip->chip.ngpio;
|
|
|
|
spin_lock_init(&mvpwm->lock);
|
|
|
|
return devm_pwmchip_add(dev, &mvpwm->chip);
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
#include <linux/seq_file.h>
|
|
|
|
static void mvebu_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
|
|
{
|
|
struct mvebu_gpio_chip *mvchip = gpiochip_get_data(chip);
|
|
u32 out, io_conf, blink, in_pol, data_in, cause, edg_msk, lvl_msk;
|
|
const char *label;
|
|
int i;
|
|
|
|
regmap_read(mvchip->regs, GPIO_OUT_OFF + mvchip->offset, &out);
|
|
regmap_read(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset, &io_conf);
|
|
regmap_read(mvchip->regs, GPIO_BLINK_EN_OFF + mvchip->offset, &blink);
|
|
regmap_read(mvchip->regs, GPIO_IN_POL_OFF + mvchip->offset, &in_pol);
|
|
regmap_read(mvchip->regs, GPIO_DATA_IN_OFF + mvchip->offset, &data_in);
|
|
cause = mvebu_gpio_read_edge_cause(mvchip);
|
|
edg_msk = mvebu_gpio_read_edge_mask(mvchip);
|
|
lvl_msk = mvebu_gpio_read_level_mask(mvchip);
|
|
|
|
for_each_requested_gpio(chip, i, label) {
|
|
u32 msk;
|
|
bool is_out;
|
|
|
|
msk = BIT(i);
|
|
is_out = !(io_conf & msk);
|
|
|
|
seq_printf(s, " gpio-%-3d (%-20.20s)", chip->base + i, label);
|
|
|
|
if (is_out) {
|
|
seq_printf(s, " out %s %s\n",
|
|
out & msk ? "hi" : "lo",
|
|
blink & msk ? "(blink )" : "");
|
|
continue;
|
|
}
|
|
|
|
seq_printf(s, " in %s (act %s) - IRQ",
|
|
(data_in ^ in_pol) & msk ? "hi" : "lo",
|
|
in_pol & msk ? "lo" : "hi");
|
|
if (!((edg_msk | lvl_msk) & msk)) {
|
|
seq_puts(s, " disabled\n");
|
|
continue;
|
|
}
|
|
if (edg_msk & msk)
|
|
seq_puts(s, " edge ");
|
|
if (lvl_msk & msk)
|
|
seq_puts(s, " level");
|
|
seq_printf(s, " (%s)\n", cause & msk ? "pending" : "clear ");
|
|
}
|
|
}
|
|
#else
|
|
#define mvebu_gpio_dbg_show NULL
|
|
#endif
|
|
|
|
static const struct of_device_id mvebu_gpio_of_match[] = {
|
|
{
|
|
.compatible = "marvell,orion-gpio",
|
|
.data = (void *) MVEBU_GPIO_SOC_VARIANT_ORION,
|
|
},
|
|
{
|
|
.compatible = "marvell,mv78200-gpio",
|
|
.data = (void *) MVEBU_GPIO_SOC_VARIANT_MV78200,
|
|
},
|
|
{
|
|
.compatible = "marvell,armadaxp-gpio",
|
|
.data = (void *) MVEBU_GPIO_SOC_VARIANT_ARMADAXP,
|
|
},
|
|
{
|
|
.compatible = "marvell,armada-370-gpio",
|
|
.data = (void *) MVEBU_GPIO_SOC_VARIANT_ORION,
|
|
},
|
|
{
|
|
.compatible = "marvell,armada-8k-gpio",
|
|
.data = (void *) MVEBU_GPIO_SOC_VARIANT_A8K,
|
|
},
|
|
{
|
|
/* sentinel */
|
|
},
|
|
};
|
|
|
|
static int mvebu_gpio_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
struct mvebu_gpio_chip *mvchip = platform_get_drvdata(pdev);
|
|
int i;
|
|
|
|
regmap_read(mvchip->regs, GPIO_OUT_OFF + mvchip->offset,
|
|
&mvchip->out_reg);
|
|
regmap_read(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset,
|
|
&mvchip->io_conf_reg);
|
|
regmap_read(mvchip->regs, GPIO_BLINK_EN_OFF + mvchip->offset,
|
|
&mvchip->blink_en_reg);
|
|
regmap_read(mvchip->regs, GPIO_IN_POL_OFF + mvchip->offset,
|
|
&mvchip->in_pol_reg);
|
|
|
|
switch (mvchip->soc_variant) {
|
|
case MVEBU_GPIO_SOC_VARIANT_ORION:
|
|
case MVEBU_GPIO_SOC_VARIANT_A8K:
|
|
regmap_read(mvchip->regs, GPIO_EDGE_MASK_OFF + mvchip->offset,
|
|
&mvchip->edge_mask_regs[0]);
|
|
regmap_read(mvchip->regs, GPIO_LEVEL_MASK_OFF + mvchip->offset,
|
|
&mvchip->level_mask_regs[0]);
|
|
break;
|
|
case MVEBU_GPIO_SOC_VARIANT_MV78200:
|
|
for (i = 0; i < 2; i++) {
|
|
regmap_read(mvchip->regs,
|
|
GPIO_EDGE_MASK_MV78200_OFF(i),
|
|
&mvchip->edge_mask_regs[i]);
|
|
regmap_read(mvchip->regs,
|
|
GPIO_LEVEL_MASK_MV78200_OFF(i),
|
|
&mvchip->level_mask_regs[i]);
|
|
}
|
|
break;
|
|
case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
|
|
for (i = 0; i < 4; i++) {
|
|
regmap_read(mvchip->regs,
|
|
GPIO_EDGE_MASK_ARMADAXP_OFF(i),
|
|
&mvchip->edge_mask_regs[i]);
|
|
regmap_read(mvchip->regs,
|
|
GPIO_LEVEL_MASK_ARMADAXP_OFF(i),
|
|
&mvchip->level_mask_regs[i]);
|
|
}
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
if (IS_REACHABLE(CONFIG_PWM))
|
|
mvebu_pwm_suspend(mvchip);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mvebu_gpio_resume(struct platform_device *pdev)
|
|
{
|
|
struct mvebu_gpio_chip *mvchip = platform_get_drvdata(pdev);
|
|
int i;
|
|
|
|
regmap_write(mvchip->regs, GPIO_OUT_OFF + mvchip->offset,
|
|
mvchip->out_reg);
|
|
regmap_write(mvchip->regs, GPIO_IO_CONF_OFF + mvchip->offset,
|
|
mvchip->io_conf_reg);
|
|
regmap_write(mvchip->regs, GPIO_BLINK_EN_OFF + mvchip->offset,
|
|
mvchip->blink_en_reg);
|
|
regmap_write(mvchip->regs, GPIO_IN_POL_OFF + mvchip->offset,
|
|
mvchip->in_pol_reg);
|
|
|
|
switch (mvchip->soc_variant) {
|
|
case MVEBU_GPIO_SOC_VARIANT_ORION:
|
|
case MVEBU_GPIO_SOC_VARIANT_A8K:
|
|
regmap_write(mvchip->regs, GPIO_EDGE_MASK_OFF + mvchip->offset,
|
|
mvchip->edge_mask_regs[0]);
|
|
regmap_write(mvchip->regs, GPIO_LEVEL_MASK_OFF + mvchip->offset,
|
|
mvchip->level_mask_regs[0]);
|
|
break;
|
|
case MVEBU_GPIO_SOC_VARIANT_MV78200:
|
|
for (i = 0; i < 2; i++) {
|
|
regmap_write(mvchip->regs,
|
|
GPIO_EDGE_MASK_MV78200_OFF(i),
|
|
mvchip->edge_mask_regs[i]);
|
|
regmap_write(mvchip->regs,
|
|
GPIO_LEVEL_MASK_MV78200_OFF(i),
|
|
mvchip->level_mask_regs[i]);
|
|
}
|
|
break;
|
|
case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
|
|
for (i = 0; i < 4; i++) {
|
|
regmap_write(mvchip->regs,
|
|
GPIO_EDGE_MASK_ARMADAXP_OFF(i),
|
|
mvchip->edge_mask_regs[i]);
|
|
regmap_write(mvchip->regs,
|
|
GPIO_LEVEL_MASK_ARMADAXP_OFF(i),
|
|
mvchip->level_mask_regs[i]);
|
|
}
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
if (IS_REACHABLE(CONFIG_PWM))
|
|
mvebu_pwm_resume(mvchip);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mvebu_gpio_probe_raw(struct platform_device *pdev,
|
|
struct mvebu_gpio_chip *mvchip)
|
|
{
|
|
void __iomem *base;
|
|
|
|
base = devm_platform_ioremap_resource(pdev, 0);
|
|
if (IS_ERR(base))
|
|
return PTR_ERR(base);
|
|
|
|
mvchip->regs = devm_regmap_init_mmio(&pdev->dev, base,
|
|
&mvebu_gpio_regmap_config);
|
|
if (IS_ERR(mvchip->regs))
|
|
return PTR_ERR(mvchip->regs);
|
|
|
|
/*
|
|
* For the legacy SoCs, the regmap directly maps to the GPIO
|
|
* registers, so no offset is needed.
|
|
*/
|
|
mvchip->offset = 0;
|
|
|
|
/*
|
|
* The Armada XP has a second range of registers for the
|
|
* per-CPU registers
|
|
*/
|
|
if (mvchip->soc_variant == MVEBU_GPIO_SOC_VARIANT_ARMADAXP) {
|
|
base = devm_platform_ioremap_resource(pdev, 1);
|
|
if (IS_ERR(base))
|
|
return PTR_ERR(base);
|
|
|
|
mvchip->percpu_regs =
|
|
devm_regmap_init_mmio(&pdev->dev, base,
|
|
&mvebu_gpio_regmap_config);
|
|
if (IS_ERR(mvchip->percpu_regs))
|
|
return PTR_ERR(mvchip->percpu_regs);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mvebu_gpio_probe_syscon(struct platform_device *pdev,
|
|
struct mvebu_gpio_chip *mvchip)
|
|
{
|
|
mvchip->regs = syscon_node_to_regmap(pdev->dev.parent->of_node);
|
|
if (IS_ERR(mvchip->regs))
|
|
return PTR_ERR(mvchip->regs);
|
|
|
|
if (of_property_read_u32(pdev->dev.of_node, "offset", &mvchip->offset))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mvebu_gpio_remove_irq_domain(void *data)
|
|
{
|
|
struct irq_domain *domain = data;
|
|
|
|
irq_domain_remove(domain);
|
|
}
|
|
|
|
static int mvebu_gpio_probe(struct platform_device *pdev)
|
|
{
|
|
struct mvebu_gpio_chip *mvchip;
|
|
const struct of_device_id *match;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct irq_chip_generic *gc;
|
|
struct irq_chip_type *ct;
|
|
unsigned int ngpios;
|
|
bool have_irqs;
|
|
int soc_variant;
|
|
int i, cpu, id;
|
|
int err;
|
|
|
|
match = of_match_device(mvebu_gpio_of_match, &pdev->dev);
|
|
if (match)
|
|
soc_variant = (unsigned long) match->data;
|
|
else
|
|
soc_variant = MVEBU_GPIO_SOC_VARIANT_ORION;
|
|
|
|
/* Some gpio controllers do not provide irq support */
|
|
err = platform_irq_count(pdev);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
have_irqs = err != 0;
|
|
|
|
mvchip = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_gpio_chip),
|
|
GFP_KERNEL);
|
|
if (!mvchip)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, mvchip);
|
|
|
|
if (of_property_read_u32(pdev->dev.of_node, "ngpios", &ngpios)) {
|
|
dev_err(&pdev->dev, "Missing ngpios OF property\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
id = of_alias_get_id(pdev->dev.of_node, "gpio");
|
|
if (id < 0) {
|
|
dev_err(&pdev->dev, "Couldn't get OF id\n");
|
|
return id;
|
|
}
|
|
|
|
mvchip->clk = devm_clk_get(&pdev->dev, NULL);
|
|
/* Not all SoCs require a clock.*/
|
|
if (!IS_ERR(mvchip->clk))
|
|
clk_prepare_enable(mvchip->clk);
|
|
|
|
mvchip->soc_variant = soc_variant;
|
|
mvchip->chip.label = dev_name(&pdev->dev);
|
|
mvchip->chip.parent = &pdev->dev;
|
|
mvchip->chip.request = gpiochip_generic_request;
|
|
mvchip->chip.free = gpiochip_generic_free;
|
|
mvchip->chip.get_direction = mvebu_gpio_get_direction;
|
|
mvchip->chip.direction_input = mvebu_gpio_direction_input;
|
|
mvchip->chip.get = mvebu_gpio_get;
|
|
mvchip->chip.direction_output = mvebu_gpio_direction_output;
|
|
mvchip->chip.set = mvebu_gpio_set;
|
|
if (have_irqs)
|
|
mvchip->chip.to_irq = mvebu_gpio_to_irq;
|
|
mvchip->chip.base = id * MVEBU_MAX_GPIO_PER_BANK;
|
|
mvchip->chip.ngpio = ngpios;
|
|
mvchip->chip.can_sleep = false;
|
|
mvchip->chip.dbg_show = mvebu_gpio_dbg_show;
|
|
|
|
if (soc_variant == MVEBU_GPIO_SOC_VARIANT_A8K)
|
|
err = mvebu_gpio_probe_syscon(pdev, mvchip);
|
|
else
|
|
err = mvebu_gpio_probe_raw(pdev, mvchip);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
/*
|
|
* Mask and clear GPIO interrupts.
|
|
*/
|
|
switch (soc_variant) {
|
|
case MVEBU_GPIO_SOC_VARIANT_ORION:
|
|
case MVEBU_GPIO_SOC_VARIANT_A8K:
|
|
regmap_write(mvchip->regs,
|
|
GPIO_EDGE_CAUSE_OFF + mvchip->offset, 0);
|
|
regmap_write(mvchip->regs,
|
|
GPIO_EDGE_MASK_OFF + mvchip->offset, 0);
|
|
regmap_write(mvchip->regs,
|
|
GPIO_LEVEL_MASK_OFF + mvchip->offset, 0);
|
|
break;
|
|
case MVEBU_GPIO_SOC_VARIANT_MV78200:
|
|
regmap_write(mvchip->regs, GPIO_EDGE_CAUSE_OFF, 0);
|
|
for (cpu = 0; cpu < 2; cpu++) {
|
|
regmap_write(mvchip->regs,
|
|
GPIO_EDGE_MASK_MV78200_OFF(cpu), 0);
|
|
regmap_write(mvchip->regs,
|
|
GPIO_LEVEL_MASK_MV78200_OFF(cpu), 0);
|
|
}
|
|
break;
|
|
case MVEBU_GPIO_SOC_VARIANT_ARMADAXP:
|
|
regmap_write(mvchip->regs, GPIO_EDGE_CAUSE_OFF, 0);
|
|
regmap_write(mvchip->regs, GPIO_EDGE_MASK_OFF, 0);
|
|
regmap_write(mvchip->regs, GPIO_LEVEL_MASK_OFF, 0);
|
|
for (cpu = 0; cpu < 4; cpu++) {
|
|
regmap_write(mvchip->percpu_regs,
|
|
GPIO_EDGE_CAUSE_ARMADAXP_OFF(cpu), 0);
|
|
regmap_write(mvchip->percpu_regs,
|
|
GPIO_EDGE_MASK_ARMADAXP_OFF(cpu), 0);
|
|
regmap_write(mvchip->percpu_regs,
|
|
GPIO_LEVEL_MASK_ARMADAXP_OFF(cpu), 0);
|
|
}
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
devm_gpiochip_add_data(&pdev->dev, &mvchip->chip, mvchip);
|
|
|
|
/* Some MVEBU SoCs have simple PWM support for GPIO lines */
|
|
if (IS_REACHABLE(CONFIG_PWM)) {
|
|
err = mvebu_pwm_probe(pdev, mvchip, id);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
/* Some gpio controllers do not provide irq support */
|
|
if (!have_irqs)
|
|
return 0;
|
|
|
|
mvchip->domain =
|
|
irq_domain_add_linear(np, ngpios, &irq_generic_chip_ops, NULL);
|
|
if (!mvchip->domain) {
|
|
dev_err(&pdev->dev, "couldn't allocate irq domain %s (DT).\n",
|
|
mvchip->chip.label);
|
|
return -ENODEV;
|
|
}
|
|
|
|
err = devm_add_action_or_reset(&pdev->dev, mvebu_gpio_remove_irq_domain,
|
|
mvchip->domain);
|
|
if (err)
|
|
return err;
|
|
|
|
err = irq_alloc_domain_generic_chips(
|
|
mvchip->domain, ngpios, 2, np->name, handle_level_irq,
|
|
IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_LEVEL, 0, 0);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "couldn't allocate irq chips %s (DT).\n",
|
|
mvchip->chip.label);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* NOTE: The common accessors cannot be used because of the percpu
|
|
* access to the mask registers
|
|
*/
|
|
gc = irq_get_domain_generic_chip(mvchip->domain, 0);
|
|
gc->private = mvchip;
|
|
ct = &gc->chip_types[0];
|
|
ct->type = IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW;
|
|
ct->chip.irq_mask = mvebu_gpio_level_irq_mask;
|
|
ct->chip.irq_unmask = mvebu_gpio_level_irq_unmask;
|
|
ct->chip.irq_set_type = mvebu_gpio_irq_set_type;
|
|
ct->chip.name = mvchip->chip.label;
|
|
|
|
ct = &gc->chip_types[1];
|
|
ct->type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
|
|
ct->chip.irq_ack = mvebu_gpio_irq_ack;
|
|
ct->chip.irq_mask = mvebu_gpio_edge_irq_mask;
|
|
ct->chip.irq_unmask = mvebu_gpio_edge_irq_unmask;
|
|
ct->chip.irq_set_type = mvebu_gpio_irq_set_type;
|
|
ct->handler = handle_edge_irq;
|
|
ct->chip.name = mvchip->chip.label;
|
|
|
|
/*
|
|
* Setup the interrupt handlers. Each chip can have up to 4
|
|
* interrupt handlers, with each handler dealing with 8 GPIO
|
|
* pins.
|
|
*/
|
|
for (i = 0; i < 4; i++) {
|
|
int irq = platform_get_irq_optional(pdev, i);
|
|
|
|
if (irq < 0)
|
|
continue;
|
|
irq_set_chained_handler_and_data(irq, mvebu_gpio_irq_handler,
|
|
mvchip);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver mvebu_gpio_driver = {
|
|
.driver = {
|
|
.name = "mvebu-gpio",
|
|
.of_match_table = mvebu_gpio_of_match,
|
|
},
|
|
.probe = mvebu_gpio_probe,
|
|
.suspend = mvebu_gpio_suspend,
|
|
.resume = mvebu_gpio_resume,
|
|
};
|
|
builtin_platform_driver(mvebu_gpio_driver);
|