mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-28 23:24:50 +00:00
8f6a83daf7
GPIO library now accepts fwnode as a firmware node, so switch the driver to use it. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20220503151321.58800-1-andriy.shevchenko@linux.intel.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
960 lines
23 KiB
C
960 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2019 Intel Corporation */
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#include <linux/gpio/driver.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/pinctrl/pinctrl.h>
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#include <linux/pinctrl/pinconf.h>
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#include <linux/pinctrl/pinconf-generic.h>
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#include <linux/pinctrl/pinmux.h>
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#include <linux/platform_device.h>
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#include <linux/property.h>
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#include "core.h"
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#include "pinconf.h"
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#include "pinmux.h"
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#include "pinctrl-equilibrium.h"
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#define PIN_NAME_FMT "io-%d"
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#define PIN_NAME_LEN 10
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#define PAD_REG_OFF 0x100
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static void eqbr_gpio_disable_irq(struct irq_data *d)
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{
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struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
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struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc);
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unsigned int offset = irqd_to_hwirq(d);
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unsigned long flags;
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raw_spin_lock_irqsave(&gctrl->lock, flags);
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writel(BIT(offset), gctrl->membase + GPIO_IRNENCLR);
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raw_spin_unlock_irqrestore(&gctrl->lock, flags);
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}
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static void eqbr_gpio_enable_irq(struct irq_data *d)
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{
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struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
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struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc);
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unsigned int offset = irqd_to_hwirq(d);
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unsigned long flags;
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gc->direction_input(gc, offset);
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raw_spin_lock_irqsave(&gctrl->lock, flags);
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writel(BIT(offset), gctrl->membase + GPIO_IRNRNSET);
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raw_spin_unlock_irqrestore(&gctrl->lock, flags);
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}
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static void eqbr_gpio_ack_irq(struct irq_data *d)
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{
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struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
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struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc);
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unsigned int offset = irqd_to_hwirq(d);
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unsigned long flags;
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raw_spin_lock_irqsave(&gctrl->lock, flags);
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writel(BIT(offset), gctrl->membase + GPIO_IRNCR);
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raw_spin_unlock_irqrestore(&gctrl->lock, flags);
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}
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static void eqbr_gpio_mask_ack_irq(struct irq_data *d)
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{
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eqbr_gpio_disable_irq(d);
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eqbr_gpio_ack_irq(d);
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}
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static inline void eqbr_cfg_bit(void __iomem *addr,
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unsigned int offset, unsigned int set)
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{
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if (set)
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writel(readl(addr) | BIT(offset), addr);
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else
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writel(readl(addr) & ~BIT(offset), addr);
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}
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static int eqbr_irq_type_cfg(struct gpio_irq_type *type,
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struct eqbr_gpio_ctrl *gctrl,
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unsigned int offset)
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{
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unsigned long flags;
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raw_spin_lock_irqsave(&gctrl->lock, flags);
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eqbr_cfg_bit(gctrl->membase + GPIO_IRNCFG, offset, type->trig_type);
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eqbr_cfg_bit(gctrl->membase + GPIO_EXINTCR1, offset, type->trig_type);
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eqbr_cfg_bit(gctrl->membase + GPIO_EXINTCR0, offset, type->logic_type);
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raw_spin_unlock_irqrestore(&gctrl->lock, flags);
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return 0;
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}
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static int eqbr_gpio_set_irq_type(struct irq_data *d, unsigned int type)
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{
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struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
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struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc);
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unsigned int offset = irqd_to_hwirq(d);
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struct gpio_irq_type it;
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memset(&it, 0, sizeof(it));
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if ((type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_NONE)
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return 0;
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switch (type) {
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case IRQ_TYPE_EDGE_RISING:
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it.trig_type = GPIO_EDGE_TRIG;
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it.edge_type = GPIO_SINGLE_EDGE;
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it.logic_type = GPIO_POSITIVE_TRIG;
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break;
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case IRQ_TYPE_EDGE_FALLING:
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it.trig_type = GPIO_EDGE_TRIG;
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it.edge_type = GPIO_SINGLE_EDGE;
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it.logic_type = GPIO_NEGATIVE_TRIG;
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break;
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case IRQ_TYPE_EDGE_BOTH:
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it.trig_type = GPIO_EDGE_TRIG;
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it.edge_type = GPIO_BOTH_EDGE;
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it.logic_type = GPIO_POSITIVE_TRIG;
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break;
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case IRQ_TYPE_LEVEL_HIGH:
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it.trig_type = GPIO_LEVEL_TRIG;
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it.edge_type = GPIO_SINGLE_EDGE;
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it.logic_type = GPIO_POSITIVE_TRIG;
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break;
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case IRQ_TYPE_LEVEL_LOW:
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it.trig_type = GPIO_LEVEL_TRIG;
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it.edge_type = GPIO_SINGLE_EDGE;
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it.logic_type = GPIO_NEGATIVE_TRIG;
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break;
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default:
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return -EINVAL;
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}
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eqbr_irq_type_cfg(&it, gctrl, offset);
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if (it.trig_type == GPIO_EDGE_TRIG)
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irq_set_handler_locked(d, handle_edge_irq);
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else
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irq_set_handler_locked(d, handle_level_irq);
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return 0;
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}
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static void eqbr_irq_handler(struct irq_desc *desc)
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{
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struct gpio_chip *gc = irq_desc_get_handler_data(desc);
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struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc);
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struct irq_chip *ic = irq_desc_get_chip(desc);
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unsigned long pins, offset;
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chained_irq_enter(ic, desc);
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pins = readl(gctrl->membase + GPIO_IRNCR);
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for_each_set_bit(offset, &pins, gc->ngpio)
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generic_handle_domain_irq(gc->irq.domain, offset);
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chained_irq_exit(ic, desc);
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}
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static int gpiochip_setup(struct device *dev, struct eqbr_gpio_ctrl *gctrl)
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{
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struct gpio_irq_chip *girq;
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struct gpio_chip *gc;
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gc = &gctrl->chip;
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gc->label = gctrl->name;
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gc->fwnode = gctrl->fwnode;
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if (!fwnode_property_read_bool(gctrl->fwnode, "interrupt-controller")) {
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dev_dbg(dev, "gc %s: doesn't act as interrupt controller!\n",
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gctrl->name);
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return 0;
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}
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gctrl->ic.name = "gpio_irq";
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gctrl->ic.irq_mask = eqbr_gpio_disable_irq;
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gctrl->ic.irq_unmask = eqbr_gpio_enable_irq;
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gctrl->ic.irq_ack = eqbr_gpio_ack_irq;
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gctrl->ic.irq_mask_ack = eqbr_gpio_mask_ack_irq;
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gctrl->ic.irq_set_type = eqbr_gpio_set_irq_type;
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girq = &gctrl->chip.irq;
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girq->chip = &gctrl->ic;
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girq->parent_handler = eqbr_irq_handler;
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girq->num_parents = 1;
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girq->parents = devm_kcalloc(dev, 1, sizeof(*girq->parents), GFP_KERNEL);
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if (!girq->parents)
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return -ENOMEM;
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girq->default_type = IRQ_TYPE_NONE;
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girq->handler = handle_bad_irq;
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girq->parents[0] = gctrl->virq;
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return 0;
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}
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static int gpiolib_reg(struct eqbr_pinctrl_drv_data *drvdata)
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{
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struct device *dev = drvdata->dev;
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struct eqbr_gpio_ctrl *gctrl;
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struct device_node *np;
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struct resource res;
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int i, ret;
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for (i = 0; i < drvdata->nr_gpio_ctrls; i++) {
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gctrl = drvdata->gpio_ctrls + i;
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np = to_of_node(gctrl->fwnode);
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gctrl->name = devm_kasprintf(dev, GFP_KERNEL, "gpiochip%d", i);
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if (!gctrl->name)
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return -ENOMEM;
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if (of_address_to_resource(np, 0, &res)) {
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dev_err(dev, "Failed to get GPIO register address\n");
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return -ENXIO;
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}
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gctrl->membase = devm_ioremap_resource(dev, &res);
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if (IS_ERR(gctrl->membase))
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return PTR_ERR(gctrl->membase);
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gctrl->virq = irq_of_parse_and_map(np, 0);
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if (!gctrl->virq) {
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dev_err(dev, "%s: failed to parse and map irq\n",
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gctrl->name);
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return -ENXIO;
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}
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raw_spin_lock_init(&gctrl->lock);
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ret = bgpio_init(&gctrl->chip, dev, gctrl->bank->nr_pins / 8,
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gctrl->membase + GPIO_IN,
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gctrl->membase + GPIO_OUTSET,
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gctrl->membase + GPIO_OUTCLR,
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gctrl->membase + GPIO_DIR,
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NULL, 0);
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if (ret) {
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dev_err(dev, "unable to init generic GPIO\n");
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return ret;
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}
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ret = gpiochip_setup(dev, gctrl);
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if (ret)
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return ret;
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ret = devm_gpiochip_add_data(dev, &gctrl->chip, gctrl);
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if (ret)
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return ret;
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}
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return 0;
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}
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static inline struct eqbr_pin_bank
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*find_pinbank_via_pin(struct eqbr_pinctrl_drv_data *pctl, unsigned int pin)
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{
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struct eqbr_pin_bank *bank;
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int i;
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for (i = 0; i < pctl->nr_banks; i++) {
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bank = &pctl->pin_banks[i];
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if (pin >= bank->pin_base &&
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(pin - bank->pin_base) < bank->nr_pins)
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return bank;
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}
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return NULL;
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}
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static const struct pinctrl_ops eqbr_pctl_ops = {
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.get_groups_count = pinctrl_generic_get_group_count,
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.get_group_name = pinctrl_generic_get_group_name,
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.get_group_pins = pinctrl_generic_get_group_pins,
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.dt_node_to_map = pinconf_generic_dt_node_to_map_all,
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.dt_free_map = pinconf_generic_dt_free_map,
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};
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static int eqbr_set_pin_mux(struct eqbr_pinctrl_drv_data *pctl,
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unsigned int pmx, unsigned int pin)
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{
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struct eqbr_pin_bank *bank;
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unsigned long flags;
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unsigned int offset;
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void __iomem *mem;
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bank = find_pinbank_via_pin(pctl, pin);
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if (!bank) {
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dev_err(pctl->dev, "Couldn't find pin bank for pin %u\n", pin);
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return -ENODEV;
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}
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mem = bank->membase;
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offset = pin - bank->pin_base;
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if (!(bank->aval_pinmap & BIT(offset))) {
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dev_err(pctl->dev,
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"PIN: %u is not valid, pinbase: %u, bitmap: %u\n",
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pin, bank->pin_base, bank->aval_pinmap);
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return -ENODEV;
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}
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raw_spin_lock_irqsave(&pctl->lock, flags);
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writel(pmx, mem + (offset * 4));
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raw_spin_unlock_irqrestore(&pctl->lock, flags);
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return 0;
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}
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static int eqbr_pinmux_set_mux(struct pinctrl_dev *pctldev,
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unsigned int selector, unsigned int group)
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{
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struct eqbr_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
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struct function_desc *func;
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struct group_desc *grp;
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unsigned int *pinmux;
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int i;
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func = pinmux_generic_get_function(pctldev, selector);
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if (!func)
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return -EINVAL;
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grp = pinctrl_generic_get_group(pctldev, group);
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if (!grp)
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return -EINVAL;
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pinmux = grp->data;
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for (i = 0; i < grp->num_pins; i++)
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eqbr_set_pin_mux(pctl, pinmux[i], grp->pins[i]);
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return 0;
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}
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static int eqbr_pinmux_gpio_request(struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range,
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unsigned int pin)
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{
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struct eqbr_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
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return eqbr_set_pin_mux(pctl, EQBR_GPIO_MODE, pin);
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}
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static const struct pinmux_ops eqbr_pinmux_ops = {
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.get_functions_count = pinmux_generic_get_function_count,
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.get_function_name = pinmux_generic_get_function_name,
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.get_function_groups = pinmux_generic_get_function_groups,
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.set_mux = eqbr_pinmux_set_mux,
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.gpio_request_enable = eqbr_pinmux_gpio_request,
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.strict = true,
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};
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static int get_drv_cur(void __iomem *mem, unsigned int offset)
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{
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unsigned int idx = offset / DRV_CUR_PINS; /* 0-15, 16-31 per register*/
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unsigned int pin_offset = offset % DRV_CUR_PINS;
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return PARSE_DRV_CURRENT(readl(mem + REG_DRCC(idx)), pin_offset);
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}
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static struct eqbr_gpio_ctrl
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*get_gpio_ctrls_via_bank(struct eqbr_pinctrl_drv_data *pctl,
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struct eqbr_pin_bank *bank)
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{
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int i;
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for (i = 0; i < pctl->nr_gpio_ctrls; i++) {
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if (pctl->gpio_ctrls[i].bank == bank)
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return &pctl->gpio_ctrls[i];
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}
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return NULL;
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}
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static int eqbr_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
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unsigned long *config)
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{
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struct eqbr_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
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enum pin_config_param param = pinconf_to_config_param(*config);
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struct eqbr_gpio_ctrl *gctrl;
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struct eqbr_pin_bank *bank;
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unsigned long flags;
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unsigned int offset;
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void __iomem *mem;
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u32 val;
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bank = find_pinbank_via_pin(pctl, pin);
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if (!bank) {
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dev_err(pctl->dev, "Couldn't find pin bank for pin %u\n", pin);
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return -ENODEV;
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}
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mem = bank->membase;
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offset = pin - bank->pin_base;
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if (!(bank->aval_pinmap & BIT(offset))) {
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dev_err(pctl->dev,
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"PIN: %u is not valid, pinbase: %u, bitmap: %u\n",
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pin, bank->pin_base, bank->aval_pinmap);
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return -ENODEV;
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}
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raw_spin_lock_irqsave(&pctl->lock, flags);
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switch (param) {
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case PIN_CONFIG_BIAS_PULL_UP:
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val = !!(readl(mem + REG_PUEN) & BIT(offset));
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break;
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case PIN_CONFIG_BIAS_PULL_DOWN:
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val = !!(readl(mem + REG_PDEN) & BIT(offset));
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break;
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case PIN_CONFIG_DRIVE_OPEN_DRAIN:
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val = !!(readl(mem + REG_OD) & BIT(offset));
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break;
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case PIN_CONFIG_DRIVE_STRENGTH:
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val = get_drv_cur(mem, offset);
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break;
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case PIN_CONFIG_SLEW_RATE:
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val = !!(readl(mem + REG_SRC) & BIT(offset));
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break;
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case PIN_CONFIG_OUTPUT_ENABLE:
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gctrl = get_gpio_ctrls_via_bank(pctl, bank);
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if (!gctrl) {
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dev_err(pctl->dev, "Failed to find gpio via bank pinbase: %u, pin: %u\n",
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bank->pin_base, pin);
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raw_spin_unlock_irqrestore(&pctl->lock, flags);
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return -ENODEV;
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}
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val = !!(readl(gctrl->membase + GPIO_DIR) & BIT(offset));
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break;
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default:
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raw_spin_unlock_irqrestore(&pctl->lock, flags);
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return -ENOTSUPP;
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}
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raw_spin_unlock_irqrestore(&pctl->lock, flags);
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*config = pinconf_to_config_packed(param, val);
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;
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return 0;
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}
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static int eqbr_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
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unsigned long *configs, unsigned int num_configs)
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{
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struct eqbr_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev);
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struct eqbr_gpio_ctrl *gctrl;
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enum pin_config_param param;
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struct eqbr_pin_bank *bank;
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unsigned int val, offset;
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struct gpio_chip *gc;
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unsigned long flags;
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void __iomem *mem;
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u32 regval, mask;
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int i;
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for (i = 0; i < num_configs; i++) {
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param = pinconf_to_config_param(configs[i]);
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val = pinconf_to_config_argument(configs[i]);
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bank = find_pinbank_via_pin(pctl, pin);
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if (!bank) {
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dev_err(pctl->dev,
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"Couldn't find pin bank for pin %u\n", pin);
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return -ENODEV;
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}
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mem = bank->membase;
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offset = pin - bank->pin_base;
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switch (param) {
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case PIN_CONFIG_BIAS_PULL_UP:
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mem += REG_PUEN;
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mask = BIT(offset);
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break;
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case PIN_CONFIG_BIAS_PULL_DOWN:
|
|
mem += REG_PDEN;
|
|
mask = BIT(offset);
|
|
break;
|
|
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
|
|
mem += REG_OD;
|
|
mask = BIT(offset);
|
|
break;
|
|
case PIN_CONFIG_DRIVE_STRENGTH:
|
|
mem += REG_DRCC(offset / DRV_CUR_PINS);
|
|
offset = (offset % DRV_CUR_PINS) * 2;
|
|
mask = GENMASK(1, 0) << offset;
|
|
break;
|
|
case PIN_CONFIG_SLEW_RATE:
|
|
mem += REG_SRC;
|
|
mask = BIT(offset);
|
|
break;
|
|
case PIN_CONFIG_OUTPUT_ENABLE:
|
|
gctrl = get_gpio_ctrls_via_bank(pctl, bank);
|
|
if (!gctrl) {
|
|
dev_err(pctl->dev, "Failed to find gpio via bank pinbase: %u, pin: %u\n",
|
|
bank->pin_base, pin);
|
|
return -ENODEV;
|
|
}
|
|
gc = &gctrl->chip;
|
|
gc->direction_output(gc, offset, 0);
|
|
continue;
|
|
default:
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
raw_spin_lock_irqsave(&pctl->lock, flags);
|
|
regval = readl(mem);
|
|
regval = (regval & ~mask) | ((val << offset) & mask);
|
|
writel(regval, mem);
|
|
raw_spin_unlock_irqrestore(&pctl->lock, flags);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int eqbr_pinconf_group_get(struct pinctrl_dev *pctldev,
|
|
unsigned int group, unsigned long *config)
|
|
{
|
|
unsigned int i, npins, old = 0;
|
|
const unsigned int *pins;
|
|
int ret;
|
|
|
|
ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins);
|
|
if (ret)
|
|
return ret;
|
|
|
|
for (i = 0; i < npins; i++) {
|
|
if (eqbr_pinconf_get(pctldev, pins[i], config))
|
|
return -ENOTSUPP;
|
|
|
|
if (i && old != *config)
|
|
return -ENOTSUPP;
|
|
|
|
old = *config;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int eqbr_pinconf_group_set(struct pinctrl_dev *pctldev,
|
|
unsigned int group, unsigned long *configs,
|
|
unsigned int num_configs)
|
|
{
|
|
const unsigned int *pins;
|
|
unsigned int i, npins;
|
|
int ret;
|
|
|
|
ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins);
|
|
if (ret)
|
|
return ret;
|
|
|
|
for (i = 0; i < npins; i++) {
|
|
ret = eqbr_pinconf_set(pctldev, pins[i], configs, num_configs);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct pinconf_ops eqbr_pinconf_ops = {
|
|
.is_generic = true,
|
|
.pin_config_get = eqbr_pinconf_get,
|
|
.pin_config_set = eqbr_pinconf_set,
|
|
.pin_config_group_get = eqbr_pinconf_group_get,
|
|
.pin_config_group_set = eqbr_pinconf_group_set,
|
|
.pin_config_config_dbg_show = pinconf_generic_dump_config,
|
|
};
|
|
|
|
static bool is_func_exist(struct eqbr_pmx_func *funcs, const char *name,
|
|
unsigned int nr_funcs, unsigned int *idx)
|
|
{
|
|
int i;
|
|
|
|
if (!funcs)
|
|
return false;
|
|
|
|
for (i = 0; i < nr_funcs; i++) {
|
|
if (funcs[i].name && !strcmp(funcs[i].name, name)) {
|
|
*idx = i;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static int funcs_utils(struct device *dev, struct eqbr_pmx_func *funcs,
|
|
unsigned int *nr_funcs, funcs_util_ops op)
|
|
{
|
|
struct device_node *node = dev->of_node;
|
|
struct device_node *np;
|
|
struct property *prop;
|
|
const char *fn_name;
|
|
unsigned int fid;
|
|
int i, j;
|
|
|
|
i = 0;
|
|
for_each_child_of_node(node, np) {
|
|
prop = of_find_property(np, "groups", NULL);
|
|
if (!prop)
|
|
continue;
|
|
|
|
if (of_property_read_string(np, "function", &fn_name)) {
|
|
/* some groups may not have function, it's OK */
|
|
dev_dbg(dev, "Group %s: not function binded!\n",
|
|
(char *)prop->value);
|
|
continue;
|
|
}
|
|
|
|
switch (op) {
|
|
case OP_COUNT_NR_FUNCS:
|
|
if (!is_func_exist(funcs, fn_name, *nr_funcs, &fid))
|
|
*nr_funcs = *nr_funcs + 1;
|
|
break;
|
|
|
|
case OP_ADD_FUNCS:
|
|
if (!is_func_exist(funcs, fn_name, *nr_funcs, &fid))
|
|
funcs[i].name = fn_name;
|
|
break;
|
|
|
|
case OP_COUNT_NR_FUNC_GRPS:
|
|
if (is_func_exist(funcs, fn_name, *nr_funcs, &fid))
|
|
funcs[fid].nr_groups++;
|
|
break;
|
|
|
|
case OP_ADD_FUNC_GRPS:
|
|
if (is_func_exist(funcs, fn_name, *nr_funcs, &fid)) {
|
|
for (j = 0; j < funcs[fid].nr_groups; j++)
|
|
if (!funcs[fid].groups[j])
|
|
break;
|
|
funcs[fid].groups[j] = prop->value;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
of_node_put(np);
|
|
return -EINVAL;
|
|
}
|
|
i++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int eqbr_build_functions(struct eqbr_pinctrl_drv_data *drvdata)
|
|
{
|
|
struct device *dev = drvdata->dev;
|
|
struct eqbr_pmx_func *funcs = NULL;
|
|
unsigned int nr_funcs = 0;
|
|
int i, ret;
|
|
|
|
ret = funcs_utils(dev, funcs, &nr_funcs, OP_COUNT_NR_FUNCS);
|
|
if (ret)
|
|
return ret;
|
|
|
|
funcs = devm_kcalloc(dev, nr_funcs, sizeof(*funcs), GFP_KERNEL);
|
|
if (!funcs)
|
|
return -ENOMEM;
|
|
|
|
ret = funcs_utils(dev, funcs, &nr_funcs, OP_ADD_FUNCS);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = funcs_utils(dev, funcs, &nr_funcs, OP_COUNT_NR_FUNC_GRPS);
|
|
if (ret)
|
|
return ret;
|
|
|
|
for (i = 0; i < nr_funcs; i++) {
|
|
if (!funcs[i].nr_groups)
|
|
continue;
|
|
funcs[i].groups = devm_kcalloc(dev, funcs[i].nr_groups,
|
|
sizeof(*(funcs[i].groups)),
|
|
GFP_KERNEL);
|
|
if (!funcs[i].groups)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ret = funcs_utils(dev, funcs, &nr_funcs, OP_ADD_FUNC_GRPS);
|
|
if (ret)
|
|
return ret;
|
|
|
|
for (i = 0; i < nr_funcs; i++) {
|
|
|
|
/* Ignore the same function with multiple groups */
|
|
if (funcs[i].name == NULL)
|
|
continue;
|
|
|
|
ret = pinmux_generic_add_function(drvdata->pctl_dev,
|
|
funcs[i].name,
|
|
funcs[i].groups,
|
|
funcs[i].nr_groups,
|
|
drvdata);
|
|
if (ret < 0) {
|
|
dev_err(dev, "Failed to register function %s\n",
|
|
funcs[i].name);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int eqbr_build_groups(struct eqbr_pinctrl_drv_data *drvdata)
|
|
{
|
|
struct device *dev = drvdata->dev;
|
|
struct device_node *node = dev->of_node;
|
|
unsigned int *pinmux, pin_id, pinmux_id;
|
|
struct group_desc group;
|
|
struct device_node *np;
|
|
struct property *prop;
|
|
int j, err;
|
|
|
|
for_each_child_of_node(node, np) {
|
|
prop = of_find_property(np, "groups", NULL);
|
|
if (!prop)
|
|
continue;
|
|
|
|
group.num_pins = of_property_count_u32_elems(np, "pins");
|
|
if (group.num_pins < 0) {
|
|
dev_err(dev, "No pins in the group: %s\n", prop->name);
|
|
of_node_put(np);
|
|
return -EINVAL;
|
|
}
|
|
group.name = prop->value;
|
|
group.pins = devm_kcalloc(dev, group.num_pins,
|
|
sizeof(*(group.pins)), GFP_KERNEL);
|
|
if (!group.pins) {
|
|
of_node_put(np);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
pinmux = devm_kcalloc(dev, group.num_pins, sizeof(*pinmux),
|
|
GFP_KERNEL);
|
|
if (!pinmux) {
|
|
of_node_put(np);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
for (j = 0; j < group.num_pins; j++) {
|
|
if (of_property_read_u32_index(np, "pins", j, &pin_id)) {
|
|
dev_err(dev, "Group %s: Read intel pins id failed\n",
|
|
group.name);
|
|
of_node_put(np);
|
|
return -EINVAL;
|
|
}
|
|
if (pin_id >= drvdata->pctl_desc.npins) {
|
|
dev_err(dev, "Group %s: Invalid pin ID, idx: %d, pin %u\n",
|
|
group.name, j, pin_id);
|
|
of_node_put(np);
|
|
return -EINVAL;
|
|
}
|
|
group.pins[j] = pin_id;
|
|
if (of_property_read_u32_index(np, "pinmux", j, &pinmux_id)) {
|
|
dev_err(dev, "Group %s: Read intel pinmux id failed\n",
|
|
group.name);
|
|
of_node_put(np);
|
|
return -EINVAL;
|
|
}
|
|
pinmux[j] = pinmux_id;
|
|
}
|
|
|
|
err = pinctrl_generic_add_group(drvdata->pctl_dev, group.name,
|
|
group.pins, group.num_pins,
|
|
pinmux);
|
|
if (err < 0) {
|
|
dev_err(dev, "Failed to register group %s\n", group.name);
|
|
of_node_put(np);
|
|
return err;
|
|
}
|
|
memset(&group, 0, sizeof(group));
|
|
pinmux = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pinctrl_reg(struct eqbr_pinctrl_drv_data *drvdata)
|
|
{
|
|
struct pinctrl_desc *pctl_desc;
|
|
struct pinctrl_pin_desc *pdesc;
|
|
struct device *dev;
|
|
unsigned int nr_pins;
|
|
char *pin_names;
|
|
int i, ret;
|
|
|
|
dev = drvdata->dev;
|
|
pctl_desc = &drvdata->pctl_desc;
|
|
pctl_desc->name = "eqbr-pinctrl";
|
|
pctl_desc->owner = THIS_MODULE;
|
|
pctl_desc->pctlops = &eqbr_pctl_ops;
|
|
pctl_desc->pmxops = &eqbr_pinmux_ops;
|
|
pctl_desc->confops = &eqbr_pinconf_ops;
|
|
raw_spin_lock_init(&drvdata->lock);
|
|
|
|
for (i = 0, nr_pins = 0; i < drvdata->nr_banks; i++)
|
|
nr_pins += drvdata->pin_banks[i].nr_pins;
|
|
|
|
pdesc = devm_kcalloc(dev, nr_pins, sizeof(*pdesc), GFP_KERNEL);
|
|
if (!pdesc)
|
|
return -ENOMEM;
|
|
pin_names = devm_kcalloc(dev, nr_pins, PIN_NAME_LEN, GFP_KERNEL);
|
|
if (!pin_names)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < nr_pins; i++) {
|
|
sprintf(pin_names, PIN_NAME_FMT, i);
|
|
pdesc[i].number = i;
|
|
pdesc[i].name = pin_names;
|
|
pin_names += PIN_NAME_LEN;
|
|
}
|
|
pctl_desc->pins = pdesc;
|
|
pctl_desc->npins = nr_pins;
|
|
dev_dbg(dev, "pinctrl total pin number: %u\n", nr_pins);
|
|
|
|
ret = devm_pinctrl_register_and_init(dev, pctl_desc, drvdata,
|
|
&drvdata->pctl_dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = eqbr_build_groups(drvdata);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to build groups\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = eqbr_build_functions(drvdata);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to build functions\n");
|
|
return ret;
|
|
}
|
|
|
|
return pinctrl_enable(drvdata->pctl_dev);
|
|
}
|
|
|
|
static int pinbank_init(struct device_node *np,
|
|
struct eqbr_pinctrl_drv_data *drvdata,
|
|
struct eqbr_pin_bank *bank, unsigned int id)
|
|
{
|
|
struct device *dev = drvdata->dev;
|
|
struct of_phandle_args spec;
|
|
int ret;
|
|
|
|
bank->membase = drvdata->membase + id * PAD_REG_OFF;
|
|
|
|
ret = of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, 0, &spec);
|
|
if (ret) {
|
|
dev_err(dev, "gpio-range not available!\n");
|
|
return ret;
|
|
}
|
|
|
|
bank->pin_base = spec.args[1];
|
|
bank->nr_pins = spec.args[2];
|
|
|
|
bank->aval_pinmap = readl(bank->membase + REG_AVAIL);
|
|
bank->id = id;
|
|
|
|
dev_dbg(dev, "pinbank id: %d, reg: %px, pinbase: %u, pin number: %u, pinmap: 0x%x\n",
|
|
id, bank->membase, bank->pin_base,
|
|
bank->nr_pins, bank->aval_pinmap);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int pinbank_probe(struct eqbr_pinctrl_drv_data *drvdata)
|
|
{
|
|
struct device *dev = drvdata->dev;
|
|
struct device_node *np_gpio;
|
|
struct eqbr_gpio_ctrl *gctrls;
|
|
struct eqbr_pin_bank *banks;
|
|
int i, nr_gpio;
|
|
|
|
/* Count gpio bank number */
|
|
nr_gpio = 0;
|
|
for_each_node_by_name(np_gpio, "gpio") {
|
|
if (of_device_is_available(np_gpio))
|
|
nr_gpio++;
|
|
}
|
|
|
|
if (!nr_gpio) {
|
|
dev_err(dev, "NO pin bank available!\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Count pin bank number and gpio controller number */
|
|
banks = devm_kcalloc(dev, nr_gpio, sizeof(*banks), GFP_KERNEL);
|
|
if (!banks)
|
|
return -ENOMEM;
|
|
|
|
gctrls = devm_kcalloc(dev, nr_gpio, sizeof(*gctrls), GFP_KERNEL);
|
|
if (!gctrls)
|
|
return -ENOMEM;
|
|
|
|
dev_dbg(dev, "found %d gpio controller!\n", nr_gpio);
|
|
|
|
/* Initialize Pin bank */
|
|
i = 0;
|
|
for_each_node_by_name(np_gpio, "gpio") {
|
|
if (!of_device_is_available(np_gpio))
|
|
continue;
|
|
|
|
pinbank_init(np_gpio, drvdata, banks + i, i);
|
|
|
|
gctrls[i].fwnode = of_fwnode_handle(np_gpio);
|
|
gctrls[i].bank = banks + i;
|
|
i++;
|
|
}
|
|
|
|
drvdata->pin_banks = banks;
|
|
drvdata->nr_banks = nr_gpio;
|
|
drvdata->gpio_ctrls = gctrls;
|
|
drvdata->nr_gpio_ctrls = nr_gpio;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int eqbr_pinctrl_probe(struct platform_device *pdev)
|
|
{
|
|
struct eqbr_pinctrl_drv_data *drvdata;
|
|
struct device *dev = &pdev->dev;
|
|
int ret;
|
|
|
|
drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
|
|
if (!drvdata)
|
|
return -ENOMEM;
|
|
|
|
drvdata->dev = dev;
|
|
|
|
drvdata->membase = devm_platform_ioremap_resource(pdev, 0);
|
|
if (IS_ERR(drvdata->membase))
|
|
return PTR_ERR(drvdata->membase);
|
|
|
|
ret = pinbank_probe(drvdata);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = pinctrl_reg(drvdata);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = gpiolib_reg(drvdata);
|
|
if (ret)
|
|
return ret;
|
|
|
|
platform_set_drvdata(pdev, drvdata);
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id eqbr_pinctrl_dt_match[] = {
|
|
{ .compatible = "intel,lgm-io" },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, eqbr_pinctrl_dt_match);
|
|
|
|
static struct platform_driver eqbr_pinctrl_driver = {
|
|
.probe = eqbr_pinctrl_probe,
|
|
.driver = {
|
|
.name = "eqbr-pinctrl",
|
|
.of_match_table = eqbr_pinctrl_dt_match,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(eqbr_pinctrl_driver);
|
|
|
|
MODULE_AUTHOR("Zhu Yixin <yixin.zhu@intel.com>, Rahul Tanwar <rahul.tanwar@intel.com>");
|
|
MODULE_DESCRIPTION("Pinctrl Driver for LGM SoC (Equilibrium)");
|
|
MODULE_LICENSE("GPL v2");
|