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![Ben Dooks (Codethink)](/assets/img/avatar_default.png)
The artpec6_pconf_set should have marked reg as __iomem, which ends up making sparse complain about address space conversions. Add the __iomem to silence the following warnings: drivers/pinctrl/pinctrl-artpec6.c:814:13: warning: incorrect type in assignment (different address spaces) drivers/pinctrl/pinctrl-artpec6.c:814:13: expected unsigned int *reg drivers/pinctrl/pinctrl-artpec6.c:814:13: got void [noderef] <asn:2> * drivers/pinctrl/pinctrl-artpec6.c:825:34: warning: incorrect type in argument 1 (different address spaces) drivers/pinctrl/pinctrl-artpec6.c:825:34: expected void const volatile [noderef] <asn:2> *addr drivers/pinctrl/pinctrl-artpec6.c:825:34: got unsigned int *reg drivers/pinctrl/pinctrl-artpec6.c:827:25: warning: incorrect type in argument 2 (different address spaces) drivers/pinctrl/pinctrl-artpec6.c:827:25: expected void volatile [noderef] <asn:2> *addr drivers/pinctrl/pinctrl-artpec6.c:827:25: got unsigned int *reg drivers/pinctrl/pinctrl-artpec6.c:837:34: warning: incorrect type in argument 1 (different address spaces) drivers/pinctrl/pinctrl-artpec6.c:837:34: expected void const volatile [noderef] <asn:2> *addr drivers/pinctrl/pinctrl-artpec6.c:837:34: got unsigned int *reg drivers/pinctrl/pinctrl-artpec6.c:840:25: warning: incorrect type in argument 2 (different address spaces) drivers/pinctrl/pinctrl-artpec6.c:840:25: expected void volatile [noderef] <asn:2> *addr drivers/pinctrl/pinctrl-artpec6.c:840:25: got unsigned int *reg drivers/pinctrl/pinctrl-artpec6.c:850:34: warning: incorrect type in argument 1 (different address spaces) drivers/pinctrl/pinctrl-artpec6.c:850:34: expected void const volatile [noderef] <asn:2> *addr drivers/pinctrl/pinctrl-artpec6.c:850:34: got unsigned int *reg drivers/pinctrl/pinctrl-artpec6.c:853:25: warning: incorrect type in argument 2 (different address spaces) drivers/pinctrl/pinctrl-artpec6.c:853:25: expected void volatile [noderef] <asn:2> *addr drivers/pinctrl/pinctrl-artpec6.c:853:25: got unsigned int *reg drivers/pinctrl/pinctrl-artpec6.c:864:34: warning: incorrect type in argument 1 (different address spaces) drivers/pinctrl/pinctrl-artpec6.c:864:34: expected void const volatile [noderef] <asn:2> *addr drivers/pinctrl/pinctrl-artpec6.c:864:34: got unsigned int *reg drivers/pinctrl/pinctrl-artpec6.c:867:25: warning: incorrect type in argument 2 (different address spaces) drivers/pinctrl/pinctrl-artpec6.c:867:25: expected void volatile [noderef] <asn:2> *addr drivers/pinctrl/pinctrl-artpec6.c:867:25: got unsigned int *reg Signed-off-by: Ben Dooks (Codethink) <ben.dooks@codethink.co.uk> Link: https://lore.kernel.org/r/20191218101602.2442868-1-ben.dooks@codethink.co.uk [Changed unsigned int -> void for the reg pointer] Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
1000 lines
26 KiB
C
1000 lines
26 KiB
C
/*
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* Driver for the Axis ARTPEC-6 pin controller
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*
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* Author: Chris Paterson <chris.paterson@linux.pieboy.co.uk>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/pinctrl/pinctrl.h>
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#include <linux/pinctrl/pinconf-generic.h>
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#include <linux/pinctrl/pinconf.h>
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#include <linux/pinctrl/pinmux.h>
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#include <linux/slab.h>
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#include "core.h"
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#include "pinconf.h"
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#include "pinctrl-utils.h"
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#define ARTPEC6_LAST_PIN 97 /* 97 pins in pinmux */
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#define ARTPEC6_MAX_MUXABLE 35 /* Last pin with muxable function */
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/* Pinmux control register bit definitions */
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#define ARTPEC6_PINMUX_UDC0_MASK 0x00000001
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#define ARTPEC6_PINMUX_UDC0_SHIFT 0
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#define ARTPEC6_PINMUX_UDC1_MASK 0x00000002
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#define ARTPEC6_PINMUX_UDC1_SHIFT 1
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#define ARTPEC6_PINMUX_DRV_MASK 0x00000060
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#define ARTPEC6_PINMUX_DRV_SHIFT 5
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#define ARTPEC6_PINMUX_SEL_MASK 0x00003000
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#define ARTPEC6_PINMUX_SEL_SHIFT 12
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/* Pinmux configurations */
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#define ARTPEC6_CONFIG_0 0
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#define ARTPEC6_CONFIG_1 1
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#define ARTPEC6_CONFIG_2 2
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#define ARTPEC6_CONFIG_3 3
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/* Pin drive strength options */
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#define ARTPEC6_DRIVE_4mA 4
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#define ARTPEC6_DRIVE_4mA_SET 0
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#define ARTPEC6_DRIVE_6mA 6
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#define ARTPEC6_DRIVE_6mA_SET 1
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#define ARTPEC6_DRIVE_8mA 8
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#define ARTPEC6_DRIVE_8mA_SET 2
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#define ARTPEC6_DRIVE_9mA 9
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#define ARTPEC6_DRIVE_9mA_SET 3
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struct artpec6_pmx {
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struct device *dev;
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struct pinctrl_dev *pctl;
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void __iomem *base;
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struct pinctrl_pin_desc *pins;
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unsigned int num_pins;
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const struct artpec6_pin_group *pin_groups;
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unsigned int num_pin_groups;
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const struct artpec6_pmx_func *functions;
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unsigned int num_functions;
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};
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struct artpec6_pin_group {
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const char *name;
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const unsigned int *pins;
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const unsigned int num_pins;
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unsigned char config;
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};
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struct artpec6_pmx_func {
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const char *name;
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const char * const *groups;
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const unsigned int num_groups;
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};
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/* pins */
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static struct pinctrl_pin_desc artpec6_pins[] = {
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PINCTRL_PIN(0, "GPIO0"),
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PINCTRL_PIN(1, "GPIO1"),
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PINCTRL_PIN(2, "GPIO2"),
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PINCTRL_PIN(3, "GPIO3"),
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PINCTRL_PIN(4, "GPIO4"),
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PINCTRL_PIN(5, "GPIO5"),
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PINCTRL_PIN(6, "GPIO6"),
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PINCTRL_PIN(7, "GPIO7"),
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PINCTRL_PIN(8, "GPIO8"),
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PINCTRL_PIN(9, "GPIO9"),
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PINCTRL_PIN(10, "GPIO10"),
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PINCTRL_PIN(11, "GPIO11"),
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PINCTRL_PIN(12, "GPIO12"),
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PINCTRL_PIN(13, "GPIO13"),
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PINCTRL_PIN(14, "GPIO14"),
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PINCTRL_PIN(15, "GPIO15"),
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PINCTRL_PIN(16, "GPIO16"),
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PINCTRL_PIN(17, "GPIO17"),
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PINCTRL_PIN(18, "GPIO18"),
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PINCTRL_PIN(19, "GPIO19"),
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PINCTRL_PIN(20, "GPIO20"),
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PINCTRL_PIN(21, "GPIO21"),
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PINCTRL_PIN(22, "GPIO22"),
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PINCTRL_PIN(23, "GPIO23"),
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PINCTRL_PIN(24, "GPIO24"),
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PINCTRL_PIN(25, "GPIO25"),
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PINCTRL_PIN(26, "GPIO26"),
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PINCTRL_PIN(27, "GPIO27"),
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PINCTRL_PIN(28, "GPIO28"),
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PINCTRL_PIN(29, "GPIO29"),
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PINCTRL_PIN(30, "GPIO30"),
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PINCTRL_PIN(31, "GPIO31"),
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PINCTRL_PIN(32, "UART3_TXD"),
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PINCTRL_PIN(33, "UART3_RXD"),
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PINCTRL_PIN(34, "UART3_RTS"),
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PINCTRL_PIN(35, "UART3_CTS"),
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PINCTRL_PIN(36, "NF_ALE"),
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PINCTRL_PIN(37, "NF_CE0_N"),
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PINCTRL_PIN(38, "NF_CE1_N"),
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PINCTRL_PIN(39, "NF_CLE"),
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PINCTRL_PIN(40, "NF_RE_N"),
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PINCTRL_PIN(41, "NF_WE_N"),
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PINCTRL_PIN(42, "NF_WP0_N"),
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PINCTRL_PIN(43, "NF_WP1_N"),
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PINCTRL_PIN(44, "NF_IO0"),
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PINCTRL_PIN(45, "NF_IO1"),
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PINCTRL_PIN(46, "NF_IO2"),
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PINCTRL_PIN(47, "NF_IO3"),
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PINCTRL_PIN(48, "NF_IO4"),
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PINCTRL_PIN(49, "NF_IO5"),
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PINCTRL_PIN(50, "NF_IO6"),
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PINCTRL_PIN(51, "NF_IO7"),
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PINCTRL_PIN(52, "NF_RB0_N"),
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PINCTRL_PIN(53, "SDIO0_CLK"),
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PINCTRL_PIN(54, "SDIO0_CMD"),
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PINCTRL_PIN(55, "SDIO0_DAT0"),
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PINCTRL_PIN(56, "SDIO0_DAT1"),
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PINCTRL_PIN(57, "SDIO0_DAT2"),
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PINCTRL_PIN(58, "SDIO0_DAT3"),
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PINCTRL_PIN(59, "SDI0_CD"),
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PINCTRL_PIN(60, "SDI0_WP"),
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PINCTRL_PIN(61, "SDIO1_CLK"),
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PINCTRL_PIN(62, "SDIO1_CMD"),
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PINCTRL_PIN(63, "SDIO1_DAT0"),
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PINCTRL_PIN(64, "SDIO1_DAT1"),
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PINCTRL_PIN(65, "SDIO1_DAT2"),
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PINCTRL_PIN(66, "SDIO1_DAT3"),
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PINCTRL_PIN(67, "SDIO1_CD"),
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PINCTRL_PIN(68, "SDIO1_WP"),
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PINCTRL_PIN(69, "GBE_REFCLk"),
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PINCTRL_PIN(70, "GBE_GTX_CLK"),
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PINCTRL_PIN(71, "GBE_TX_CLK"),
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PINCTRL_PIN(72, "GBE_TX_EN"),
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PINCTRL_PIN(73, "GBE_TX_ER"),
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PINCTRL_PIN(74, "GBE_TXD0"),
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PINCTRL_PIN(75, "GBE_TXD1"),
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PINCTRL_PIN(76, "GBE_TXD2"),
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PINCTRL_PIN(77, "GBE_TXD3"),
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PINCTRL_PIN(78, "GBE_TXD4"),
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PINCTRL_PIN(79, "GBE_TXD5"),
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PINCTRL_PIN(80, "GBE_TXD6"),
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PINCTRL_PIN(81, "GBE_TXD7"),
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PINCTRL_PIN(82, "GBE_RX_CLK"),
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PINCTRL_PIN(83, "GBE_RX_DV"),
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PINCTRL_PIN(84, "GBE_RX_ER"),
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PINCTRL_PIN(85, "GBE_RXD0"),
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PINCTRL_PIN(86, "GBE_RXD1"),
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PINCTRL_PIN(87, "GBE_RXD2"),
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PINCTRL_PIN(88, "GBE_RXD3"),
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PINCTRL_PIN(89, "GBE_RXD4"),
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PINCTRL_PIN(90, "GBE_RXD5"),
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PINCTRL_PIN(91, "GBE_RXD6"),
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PINCTRL_PIN(92, "GBE_RXD7"),
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PINCTRL_PIN(93, "GBE_CRS"),
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PINCTRL_PIN(94, "GBE_COL"),
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PINCTRL_PIN(95, "GBE_MDC"),
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PINCTRL_PIN(96, "GBE_MDIO"),
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};
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static const unsigned int cpuclkout_pins0[] = { 0 };
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static const unsigned int udlclkout_pins0[] = { 1 };
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static const unsigned int i2c1_pins0[] = { 2, 3 };
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static const unsigned int i2c2_pins0[] = { 4, 5 };
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static const unsigned int i2c3_pins0[] = { 6, 7 };
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static const unsigned int i2s0_pins0[] = { 8, 9, 10, 11 };
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static const unsigned int i2s1_pins0[] = { 12, 13, 14, 15 };
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static const unsigned int i2srefclk_pins0[] = { 19 };
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static const unsigned int spi0_pins0[] = { 12, 13, 14, 15 };
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static const unsigned int spi1_pins0[] = { 16, 17, 18, 19 };
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static const unsigned int pciedebug_pins0[] = { 12, 13, 14, 15 };
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static const unsigned int uart0_pins0[] = { 16, 17, 18, 19, 20,
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21, 22, 23, 24, 25 };
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static const unsigned int uart0_pins1[] = { 20, 21, 22, 23 };
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static const unsigned int uart1_pins0[] = { 24, 25, 26, 27 };
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static const unsigned int uart2_pins0[] = { 26, 27, 28, 29, 30,
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31, 32, 33, 34, 35 };
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static const unsigned int uart2_pins1[] = { 28, 29, 30, 31 };
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static const unsigned int uart3_pins0[] = { 32, 33, 34, 35 };
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static const unsigned int uart4_pins0[] = { 20, 21, 22, 23 };
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static const unsigned int uart5_pins0[] = { 28, 29, 30, 31 };
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static const unsigned int nand_pins0[] = { 36, 37, 38, 39, 40, 41,
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42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52 };
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static const unsigned int sdio0_pins0[] = { 53, 54, 55, 56, 57, 58, 59, 60 };
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static const unsigned int sdio1_pins0[] = { 61, 62, 63, 64, 65, 66, 67, 68 };
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static const unsigned int ethernet_pins0[] = { 69, 70, 71, 72, 73, 74, 75,
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76, 77, 78, 79, 80, 81, 82,
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83, 84, 85, 86, 87, 88, 89,
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90, 91, 92, 93, 94, 95, 96 };
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static const struct artpec6_pin_group artpec6_pin_groups[] = {
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{
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.name = "cpuclkoutgrp0",
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.pins = cpuclkout_pins0,
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.num_pins = ARRAY_SIZE(cpuclkout_pins0),
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.config = ARTPEC6_CONFIG_1,
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},
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{
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.name = "udlclkoutgrp0",
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.pins = udlclkout_pins0,
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.num_pins = ARRAY_SIZE(udlclkout_pins0),
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.config = ARTPEC6_CONFIG_1,
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},
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{
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.name = "i2c1grp0",
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.pins = i2c1_pins0,
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.num_pins = ARRAY_SIZE(i2c1_pins0),
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.config = ARTPEC6_CONFIG_1,
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},
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{
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.name = "i2c2grp0",
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.pins = i2c2_pins0,
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.num_pins = ARRAY_SIZE(i2c2_pins0),
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.config = ARTPEC6_CONFIG_1,
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},
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{
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.name = "i2c3grp0",
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.pins = i2c3_pins0,
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.num_pins = ARRAY_SIZE(i2c3_pins0),
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.config = ARTPEC6_CONFIG_1,
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},
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{
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.name = "i2s0grp0",
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.pins = i2s0_pins0,
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.num_pins = ARRAY_SIZE(i2s0_pins0),
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.config = ARTPEC6_CONFIG_1,
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},
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{
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.name = "i2s1grp0",
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.pins = i2s1_pins0,
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.num_pins = ARRAY_SIZE(i2s1_pins0),
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.config = ARTPEC6_CONFIG_1,
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},
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{
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.name = "i2srefclkgrp0",
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.pins = i2srefclk_pins0,
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.num_pins = ARRAY_SIZE(i2srefclk_pins0),
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.config = ARTPEC6_CONFIG_3,
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},
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{
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.name = "spi0grp0",
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.pins = spi0_pins0,
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.num_pins = ARRAY_SIZE(spi0_pins0),
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.config = ARTPEC6_CONFIG_2,
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},
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{
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.name = "spi1grp0",
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.pins = spi1_pins0,
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.num_pins = ARRAY_SIZE(spi1_pins0),
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.config = ARTPEC6_CONFIG_2,
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},
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{
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.name = "pciedebuggrp0",
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.pins = pciedebug_pins0,
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.num_pins = ARRAY_SIZE(pciedebug_pins0),
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.config = ARTPEC6_CONFIG_3,
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},
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{
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.name = "uart0grp0", /* All pins. */
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.pins = uart0_pins0,
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.num_pins = ARRAY_SIZE(uart0_pins0),
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.config = ARTPEC6_CONFIG_1,
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},
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{
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.name = "uart0grp1", /* RX/TX and RTS/CTS */
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.pins = uart0_pins1,
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.num_pins = ARRAY_SIZE(uart0_pins1),
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.config = ARTPEC6_CONFIG_1,
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},
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{
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.name = "uart0grp2", /* Only RX/TX pins. */
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.pins = uart0_pins1,
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.num_pins = ARRAY_SIZE(uart0_pins1) - 2,
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.config = ARTPEC6_CONFIG_1,
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},
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{
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.name = "uart1grp0", /* RX/TX and RTS/CTS */
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.pins = uart1_pins0,
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.num_pins = ARRAY_SIZE(uart1_pins0),
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.config = ARTPEC6_CONFIG_2,
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},
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{
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.name = "uart1grp1", /* Only RX/TX pins. */
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.pins = uart1_pins0,
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.num_pins = 2,
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.config = ARTPEC6_CONFIG_2,
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},
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{
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.name = "uart2grp0", /* Full pinout */
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.pins = uart2_pins0,
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.num_pins = ARRAY_SIZE(uart2_pins0),
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.config = ARTPEC6_CONFIG_1,
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},
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{
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.name = "uart2grp1", /* RX/TX and RTS/CTS */
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.pins = uart2_pins1,
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.num_pins = ARRAY_SIZE(uart2_pins1),
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.config = ARTPEC6_CONFIG_1,
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},
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{
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.name = "uart2grp2", /* Only RX/TX */
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.pins = uart2_pins1,
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.num_pins = 2,
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.config = ARTPEC6_CONFIG_1,
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},
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{
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.name = "uart3grp0", /* RX/TX and CTS/RTS */
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.pins = uart3_pins0,
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.num_pins = ARRAY_SIZE(uart3_pins0),
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.config = ARTPEC6_CONFIG_0,
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},
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{
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.name = "uart3grp1", /* Only RX/TX */
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.pins = uart3_pins0,
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.num_pins = ARRAY_SIZE(uart3_pins0),
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.config = ARTPEC6_CONFIG_0,
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},
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{
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.name = "uart4grp0",
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.pins = uart4_pins0,
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.num_pins = ARRAY_SIZE(uart4_pins0),
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.config = ARTPEC6_CONFIG_2,
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},
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{
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.name = "uart5grp0", /* TX/RX and RTS/CTS */
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.pins = uart5_pins0,
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.num_pins = ARRAY_SIZE(uart5_pins0),
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.config = ARTPEC6_CONFIG_2,
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},
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{
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.name = "uart5grp1", /* Only TX/RX */
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.pins = uart5_pins0,
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.num_pins = 2,
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.config = ARTPEC6_CONFIG_2,
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},
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{
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.name = "uart5nocts", /* TX/RX/RTS */
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.pins = uart5_pins0,
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.num_pins = ARRAY_SIZE(uart5_pins0) - 1,
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.config = ARTPEC6_CONFIG_2,
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},
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{
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.name = "nandgrp0",
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.pins = nand_pins0,
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.num_pins = ARRAY_SIZE(nand_pins0),
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.config = ARTPEC6_CONFIG_0,
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},
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{
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.name = "sdio0grp0",
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.pins = sdio0_pins0,
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.num_pins = ARRAY_SIZE(sdio0_pins0),
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.config = ARTPEC6_CONFIG_0,
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},
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{
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.name = "sdio1grp0",
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.pins = sdio1_pins0,
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.num_pins = ARRAY_SIZE(sdio1_pins0),
|
|
.config = ARTPEC6_CONFIG_0,
|
|
},
|
|
{
|
|
.name = "ethernetgrp0",
|
|
.pins = ethernet_pins0,
|
|
.num_pins = ARRAY_SIZE(ethernet_pins0),
|
|
.config = ARTPEC6_CONFIG_0,
|
|
},
|
|
};
|
|
|
|
struct pin_register {
|
|
unsigned int start;
|
|
unsigned int end;
|
|
unsigned int reg_base;
|
|
};
|
|
|
|
/*
|
|
* The register map has two holes where the pin number
|
|
* no longer fits directly with the register offset.
|
|
* This table allows us to map this easily.
|
|
*/
|
|
static const struct pin_register pin_register[] = {
|
|
{ 0, 35, 0x0 }, /* 0x0 - 0x8c */
|
|
{ 36, 52, 0x100 }, /* 0x100 - 0x140 */
|
|
{ 53, 96, 0x180 }, /* 0x180 - 0x22c */
|
|
};
|
|
|
|
static unsigned int artpec6_pmx_reg_offset(unsigned int pin)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(pin_register); i++) {
|
|
if (pin <= pin_register[i].end) {
|
|
return (pin - pin_register[i].start) * 4 +
|
|
pin_register[i].reg_base;
|
|
}
|
|
}
|
|
/*
|
|
* Anything we return here is wrong, but we can only
|
|
* get here if pin is outside registered range.
|
|
*/
|
|
pr_err("%s: Impossible pin %d\n", __func__, pin);
|
|
return 0;
|
|
}
|
|
|
|
static int artpec6_get_groups_count(struct pinctrl_dev *pctldev)
|
|
{
|
|
return ARRAY_SIZE(artpec6_pin_groups);
|
|
}
|
|
|
|
static const char *artpec6_get_group_name(struct pinctrl_dev *pctldev,
|
|
unsigned int group)
|
|
{
|
|
return artpec6_pin_groups[group].name;
|
|
}
|
|
|
|
static int artpec6_get_group_pins(struct pinctrl_dev *pctldev,
|
|
unsigned int group,
|
|
const unsigned int **pins,
|
|
unsigned int *num_pins)
|
|
{
|
|
*pins = (unsigned int *)artpec6_pin_groups[group].pins;
|
|
*num_pins = artpec6_pin_groups[group].num_pins;
|
|
return 0;
|
|
}
|
|
|
|
static int artpec6_pconf_drive_mA_to_field(unsigned int mA)
|
|
{
|
|
switch (mA) {
|
|
case ARTPEC6_DRIVE_4mA:
|
|
return ARTPEC6_DRIVE_4mA_SET;
|
|
case ARTPEC6_DRIVE_6mA:
|
|
return ARTPEC6_DRIVE_6mA_SET;
|
|
case ARTPEC6_DRIVE_8mA:
|
|
return ARTPEC6_DRIVE_8mA_SET;
|
|
case ARTPEC6_DRIVE_9mA:
|
|
return ARTPEC6_DRIVE_9mA_SET;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static unsigned int artpec6_pconf_drive_field_to_mA(int field)
|
|
{
|
|
switch (field) {
|
|
case ARTPEC6_DRIVE_4mA_SET:
|
|
return ARTPEC6_DRIVE_4mA;
|
|
case ARTPEC6_DRIVE_6mA_SET:
|
|
return ARTPEC6_DRIVE_6mA;
|
|
case ARTPEC6_DRIVE_8mA_SET:
|
|
return ARTPEC6_DRIVE_8mA;
|
|
case ARTPEC6_DRIVE_9mA_SET:
|
|
return ARTPEC6_DRIVE_9mA;
|
|
default:
|
|
/* Shouldn't happen */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static const struct pinctrl_ops artpec6_pctrl_ops = {
|
|
.get_group_pins = artpec6_get_group_pins,
|
|
.get_groups_count = artpec6_get_groups_count,
|
|
.get_group_name = artpec6_get_group_name,
|
|
.dt_node_to_map = pinconf_generic_dt_node_to_map_all,
|
|
.dt_free_map = pinctrl_utils_free_map,
|
|
};
|
|
|
|
static const char * const gpiogrps[] = {
|
|
"cpuclkoutgrp0", "udlclkoutgrp0", "i2c1grp0", "i2c2grp0",
|
|
"i2c3grp0", "i2s0grp0", "i2s1grp0", "i2srefclkgrp0",
|
|
"spi0grp0", "spi1grp0", "pciedebuggrp0", "uart0grp0",
|
|
"uart0grp1", "uart0grp2", "uart1grp0", "uart1grp1",
|
|
"uart2grp0", "uart2grp1", "uart2grp2", "uart4grp0", "uart5grp0",
|
|
"uart5grp1", "uart5nocts",
|
|
};
|
|
static const char * const cpuclkoutgrps[] = { "cpuclkoutgrp0" };
|
|
static const char * const udlclkoutgrps[] = { "udlclkoutgrp0" };
|
|
static const char * const i2c1grps[] = { "i2c1grp0" };
|
|
static const char * const i2c2grps[] = { "i2c2grp0" };
|
|
static const char * const i2c3grps[] = { "i2c3grp0" };
|
|
static const char * const i2s0grps[] = { "i2s0grp0" };
|
|
static const char * const i2s1grps[] = { "i2s1grp0" };
|
|
static const char * const i2srefclkgrps[] = { "i2srefclkgrp0" };
|
|
static const char * const spi0grps[] = { "spi0grp0" };
|
|
static const char * const spi1grps[] = { "spi1grp0" };
|
|
static const char * const pciedebuggrps[] = { "pciedebuggrp0" };
|
|
static const char * const uart0grps[] = { "uart0grp0", "uart0grp1",
|
|
"uart0grp2" };
|
|
static const char * const uart1grps[] = { "uart1grp0", "uart1grp1" };
|
|
static const char * const uart2grps[] = { "uart2grp0", "uart2grp1",
|
|
"uart2grp2" };
|
|
static const char * const uart3grps[] = { "uart3grp0" };
|
|
static const char * const uart4grps[] = { "uart4grp0", "uart4grp1" };
|
|
static const char * const uart5grps[] = { "uart5grp0", "uart5grp1",
|
|
"uart5nocts" };
|
|
static const char * const nandgrps[] = { "nandgrp0" };
|
|
static const char * const sdio0grps[] = { "sdio0grp0" };
|
|
static const char * const sdio1grps[] = { "sdio1grp0" };
|
|
static const char * const ethernetgrps[] = { "ethernetgrp0" };
|
|
|
|
static const struct artpec6_pmx_func artpec6_pmx_functions[] = {
|
|
{
|
|
.name = "gpio",
|
|
.groups = gpiogrps,
|
|
.num_groups = ARRAY_SIZE(gpiogrps),
|
|
},
|
|
{
|
|
.name = "cpuclkout",
|
|
.groups = cpuclkoutgrps,
|
|
.num_groups = ARRAY_SIZE(cpuclkoutgrps),
|
|
},
|
|
{
|
|
.name = "udlclkout",
|
|
.groups = udlclkoutgrps,
|
|
.num_groups = ARRAY_SIZE(udlclkoutgrps),
|
|
},
|
|
{
|
|
.name = "i2c1",
|
|
.groups = i2c1grps,
|
|
.num_groups = ARRAY_SIZE(i2c1grps),
|
|
},
|
|
{
|
|
.name = "i2c2",
|
|
.groups = i2c2grps,
|
|
.num_groups = ARRAY_SIZE(i2c2grps),
|
|
},
|
|
{
|
|
.name = "i2c3",
|
|
.groups = i2c3grps,
|
|
.num_groups = ARRAY_SIZE(i2c3grps),
|
|
},
|
|
{
|
|
.name = "i2s0",
|
|
.groups = i2s0grps,
|
|
.num_groups = ARRAY_SIZE(i2s0grps),
|
|
},
|
|
{
|
|
.name = "i2s1",
|
|
.groups = i2s1grps,
|
|
.num_groups = ARRAY_SIZE(i2s1grps),
|
|
},
|
|
{
|
|
.name = "i2srefclk",
|
|
.groups = i2srefclkgrps,
|
|
.num_groups = ARRAY_SIZE(i2srefclkgrps),
|
|
},
|
|
{
|
|
.name = "spi0",
|
|
.groups = spi0grps,
|
|
.num_groups = ARRAY_SIZE(spi0grps),
|
|
},
|
|
{
|
|
.name = "spi1",
|
|
.groups = spi1grps,
|
|
.num_groups = ARRAY_SIZE(spi1grps),
|
|
},
|
|
{
|
|
.name = "pciedebug",
|
|
.groups = pciedebuggrps,
|
|
.num_groups = ARRAY_SIZE(pciedebuggrps),
|
|
},
|
|
{
|
|
.name = "uart0",
|
|
.groups = uart0grps,
|
|
.num_groups = ARRAY_SIZE(uart0grps),
|
|
},
|
|
{
|
|
.name = "uart1",
|
|
.groups = uart1grps,
|
|
.num_groups = ARRAY_SIZE(uart1grps),
|
|
},
|
|
{
|
|
.name = "uart2",
|
|
.groups = uart2grps,
|
|
.num_groups = ARRAY_SIZE(uart2grps),
|
|
},
|
|
{
|
|
.name = "uart3",
|
|
.groups = uart3grps,
|
|
.num_groups = ARRAY_SIZE(uart3grps),
|
|
},
|
|
{
|
|
.name = "uart4",
|
|
.groups = uart4grps,
|
|
.num_groups = ARRAY_SIZE(uart4grps),
|
|
},
|
|
{
|
|
.name = "uart5",
|
|
.groups = uart5grps,
|
|
.num_groups = ARRAY_SIZE(uart5grps),
|
|
},
|
|
{
|
|
.name = "nand",
|
|
.groups = nandgrps,
|
|
.num_groups = ARRAY_SIZE(nandgrps),
|
|
},
|
|
{
|
|
.name = "sdio0",
|
|
.groups = sdio0grps,
|
|
.num_groups = ARRAY_SIZE(sdio0grps),
|
|
},
|
|
{
|
|
.name = "sdio1",
|
|
.groups = sdio1grps,
|
|
.num_groups = ARRAY_SIZE(sdio1grps),
|
|
},
|
|
{
|
|
.name = "ethernet",
|
|
.groups = ethernetgrps,
|
|
.num_groups = ARRAY_SIZE(ethernetgrps),
|
|
},
|
|
};
|
|
|
|
static int artpec6_pmx_get_functions_count(struct pinctrl_dev *pctldev)
|
|
{
|
|
return ARRAY_SIZE(artpec6_pmx_functions);
|
|
}
|
|
|
|
static const char *artpec6_pmx_get_fname(struct pinctrl_dev *pctldev,
|
|
unsigned int function)
|
|
{
|
|
return artpec6_pmx_functions[function].name;
|
|
}
|
|
|
|
static int artpec6_pmx_get_fgroups(struct pinctrl_dev *pctldev,
|
|
unsigned int function,
|
|
const char * const **groups,
|
|
unsigned int * const num_groups)
|
|
{
|
|
*groups = artpec6_pmx_functions[function].groups;
|
|
*num_groups = artpec6_pmx_functions[function].num_groups;
|
|
return 0;
|
|
}
|
|
|
|
static void artpec6_pmx_select_func(struct pinctrl_dev *pctldev,
|
|
unsigned int function, unsigned int group,
|
|
bool enable)
|
|
{
|
|
unsigned int regval, val;
|
|
unsigned int reg;
|
|
int i;
|
|
struct artpec6_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
for (i = 0; i < artpec6_pin_groups[group].num_pins; i++) {
|
|
/*
|
|
* Registers for pins above a ARTPEC6_MAX_MUXABLE
|
|
* do not have a SEL field and are always selected.
|
|
*/
|
|
if (artpec6_pin_groups[group].pins[i] > ARTPEC6_MAX_MUXABLE)
|
|
continue;
|
|
|
|
if (!strcmp(artpec6_pmx_get_fname(pctldev, function), "gpio")) {
|
|
/* GPIO is always config 0 */
|
|
val = ARTPEC6_CONFIG_0 << ARTPEC6_PINMUX_SEL_SHIFT;
|
|
} else {
|
|
if (enable)
|
|
val = artpec6_pin_groups[group].config
|
|
<< ARTPEC6_PINMUX_SEL_SHIFT;
|
|
else
|
|
val = ARTPEC6_CONFIG_0
|
|
<< ARTPEC6_PINMUX_SEL_SHIFT;
|
|
}
|
|
|
|
reg = artpec6_pmx_reg_offset(artpec6_pin_groups[group].pins[i]);
|
|
|
|
regval = readl(pmx->base + reg);
|
|
regval &= ~ARTPEC6_PINMUX_SEL_MASK;
|
|
regval |= val;
|
|
writel(regval, pmx->base + reg);
|
|
}
|
|
}
|
|
|
|
static int artpec6_pmx_set(struct pinctrl_dev *pctldev,
|
|
unsigned int function,
|
|
unsigned int group)
|
|
{
|
|
struct artpec6_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
dev_dbg(pmx->dev, "enabling %s function for pin group %s\n",
|
|
artpec6_pmx_get_fname(pctldev, function),
|
|
artpec6_get_group_name(pctldev, group));
|
|
|
|
artpec6_pmx_select_func(pctldev, function, group, true);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int artpec6_pmx_request_gpio(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_gpio_range *range,
|
|
unsigned int pin)
|
|
{
|
|
struct artpec6_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
|
|
unsigned int reg = artpec6_pmx_reg_offset(pin);
|
|
u32 val;
|
|
|
|
if (pin >= 32)
|
|
return -EINVAL;
|
|
|
|
val = readl_relaxed(pmx->base + reg);
|
|
val &= ~ARTPEC6_PINMUX_SEL_MASK;
|
|
val |= ARTPEC6_CONFIG_0 << ARTPEC6_PINMUX_SEL_SHIFT;
|
|
writel_relaxed(val, pmx->base + reg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct pinmux_ops artpec6_pmx_ops = {
|
|
.get_functions_count = artpec6_pmx_get_functions_count,
|
|
.get_function_name = artpec6_pmx_get_fname,
|
|
.get_function_groups = artpec6_pmx_get_fgroups,
|
|
.set_mux = artpec6_pmx_set,
|
|
.gpio_request_enable = artpec6_pmx_request_gpio,
|
|
};
|
|
|
|
static int artpec6_pconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
|
|
unsigned long *config)
|
|
{
|
|
struct artpec6_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
|
|
enum pin_config_param param = pinconf_to_config_param(*config);
|
|
unsigned int regval;
|
|
|
|
/* Check for valid pin */
|
|
if (pin >= pmx->num_pins) {
|
|
dev_dbg(pmx->dev, "pinconf is not supported for pin %s\n",
|
|
pmx->pins[pin].name);
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
dev_dbg(pmx->dev, "getting configuration for pin %s\n",
|
|
pmx->pins[pin].name);
|
|
|
|
/* Read pin register values */
|
|
regval = readl(pmx->base + artpec6_pmx_reg_offset(pin));
|
|
|
|
/* If valid, get configuration for parameter */
|
|
switch (param) {
|
|
case PIN_CONFIG_BIAS_DISABLE:
|
|
if (!(regval & ARTPEC6_PINMUX_UDC1_MASK))
|
|
return -EINVAL;
|
|
break;
|
|
|
|
case PIN_CONFIG_BIAS_PULL_UP:
|
|
case PIN_CONFIG_BIAS_PULL_DOWN:
|
|
if (regval & ARTPEC6_PINMUX_UDC1_MASK)
|
|
return -EINVAL;
|
|
|
|
regval = regval & ARTPEC6_PINMUX_UDC0_MASK;
|
|
if ((param == PIN_CONFIG_BIAS_PULL_UP && !regval) ||
|
|
(param == PIN_CONFIG_BIAS_PULL_DOWN && regval))
|
|
return -EINVAL;
|
|
break;
|
|
case PIN_CONFIG_DRIVE_STRENGTH:
|
|
regval = (regval & ARTPEC6_PINMUX_DRV_MASK)
|
|
>> ARTPEC6_PINMUX_DRV_SHIFT;
|
|
regval = artpec6_pconf_drive_field_to_mA(regval);
|
|
*config = pinconf_to_config_packed(param, regval);
|
|
break;
|
|
default:
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Valid combinations of param and arg:
|
|
*
|
|
* param arg
|
|
* PIN_CONFIG_BIAS_DISABLE: x (disable bias)
|
|
* PIN_CONFIG_BIAS_PULL_UP: 1 (pull up bias + enable)
|
|
* PIN_CONFIG_BIAS_PULL_DOWN: 1 (pull down bias + enable)
|
|
* PIN_CONFIG_DRIVE_STRENGTH: x (4mA, 6mA, 8mA, 9mA)
|
|
*
|
|
* All other args are invalid. All other params are not supported.
|
|
*/
|
|
static int artpec6_pconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
|
|
unsigned long *configs, unsigned int num_configs)
|
|
{
|
|
struct artpec6_pmx *pmx = pinctrl_dev_get_drvdata(pctldev);
|
|
enum pin_config_param param;
|
|
unsigned int arg;
|
|
unsigned int regval;
|
|
void __iomem *reg;
|
|
int i;
|
|
|
|
/* Check for valid pin */
|
|
if (pin >= pmx->num_pins) {
|
|
dev_dbg(pmx->dev, "pinconf is not supported for pin %s\n",
|
|
pmx->pins[pin].name);
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
dev_dbg(pmx->dev, "setting configuration for pin %s\n",
|
|
pmx->pins[pin].name);
|
|
|
|
reg = pmx->base + artpec6_pmx_reg_offset(pin);
|
|
|
|
/* For each config */
|
|
for (i = 0; i < num_configs; i++) {
|
|
int drive;
|
|
|
|
param = pinconf_to_config_param(configs[i]);
|
|
arg = pinconf_to_config_argument(configs[i]);
|
|
|
|
switch (param) {
|
|
case PIN_CONFIG_BIAS_DISABLE:
|
|
regval = readl(reg);
|
|
regval |= (1 << ARTPEC6_PINMUX_UDC1_SHIFT);
|
|
writel(regval, reg);
|
|
break;
|
|
|
|
case PIN_CONFIG_BIAS_PULL_UP:
|
|
if (arg != 1) {
|
|
dev_dbg(pctldev->dev, "%s: arg %u out of range\n",
|
|
__func__, arg);
|
|
return -EINVAL;
|
|
}
|
|
|
|
regval = readl(reg);
|
|
regval |= (arg << ARTPEC6_PINMUX_UDC0_SHIFT);
|
|
regval &= ~ARTPEC6_PINMUX_UDC1_MASK; /* Enable */
|
|
writel(regval, reg);
|
|
break;
|
|
|
|
case PIN_CONFIG_BIAS_PULL_DOWN:
|
|
if (arg != 1) {
|
|
dev_dbg(pctldev->dev, "%s: arg %u out of range\n",
|
|
__func__, arg);
|
|
return -EINVAL;
|
|
}
|
|
|
|
regval = readl(reg);
|
|
regval &= ~(arg << ARTPEC6_PINMUX_UDC0_SHIFT);
|
|
regval &= ~ARTPEC6_PINMUX_UDC1_MASK; /* Enable */
|
|
writel(regval, reg);
|
|
break;
|
|
|
|
case PIN_CONFIG_DRIVE_STRENGTH:
|
|
drive = artpec6_pconf_drive_mA_to_field(arg);
|
|
if (drive < 0) {
|
|
dev_dbg(pctldev->dev, "%s: arg %u out of range\n",
|
|
__func__, arg);
|
|
return -EINVAL;
|
|
}
|
|
|
|
regval = readl(reg);
|
|
regval &= ~ARTPEC6_PINMUX_DRV_MASK;
|
|
regval |= (drive << ARTPEC6_PINMUX_DRV_SHIFT);
|
|
writel(regval, reg);
|
|
break;
|
|
|
|
default:
|
|
dev_dbg(pmx->dev, "parameter not supported\n");
|
|
return -ENOTSUPP;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int artpec6_pconf_group_set(struct pinctrl_dev *pctldev,
|
|
unsigned int group, unsigned long *configs,
|
|
unsigned int num_configs)
|
|
{
|
|
unsigned int num_pins, current_pin;
|
|
int ret;
|
|
|
|
dev_dbg(pctldev->dev, "setting group %s configuration\n",
|
|
artpec6_get_group_name(pctldev, group));
|
|
|
|
num_pins = artpec6_pin_groups[group].num_pins;
|
|
|
|
for (current_pin = 0; current_pin < num_pins; current_pin++) {
|
|
ret = artpec6_pconf_set(pctldev,
|
|
artpec6_pin_groups[group].pins[current_pin],
|
|
configs, num_configs);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct pinconf_ops artpec6_pconf_ops = {
|
|
.is_generic = true,
|
|
.pin_config_get = artpec6_pconf_get,
|
|
.pin_config_set = artpec6_pconf_set,
|
|
.pin_config_group_set = artpec6_pconf_group_set,
|
|
};
|
|
|
|
static struct pinctrl_desc artpec6_desc = {
|
|
.name = "artpec6-pinctrl",
|
|
.owner = THIS_MODULE,
|
|
.pins = artpec6_pins,
|
|
.npins = ARRAY_SIZE(artpec6_pins),
|
|
.pctlops = &artpec6_pctrl_ops,
|
|
.pmxops = &artpec6_pmx_ops,
|
|
.confops = &artpec6_pconf_ops,
|
|
};
|
|
|
|
/* The reset values say 4mA, but we want 8mA as default. */
|
|
static void artpec6_pmx_reset(struct artpec6_pmx *pmx)
|
|
{
|
|
void __iomem *base = pmx->base;
|
|
int i;
|
|
|
|
for (i = 0; i < ARTPEC6_LAST_PIN; i++) {
|
|
u32 val;
|
|
|
|
val = readl_relaxed(base + artpec6_pmx_reg_offset(i));
|
|
val &= ~ARTPEC6_PINMUX_DRV_MASK;
|
|
val |= ARTPEC6_DRIVE_8mA_SET << ARTPEC6_PINMUX_DRV_SHIFT;
|
|
writel_relaxed(val, base + artpec6_pmx_reg_offset(i));
|
|
}
|
|
}
|
|
|
|
static int artpec6_pmx_probe(struct platform_device *pdev)
|
|
{
|
|
struct artpec6_pmx *pmx;
|
|
|
|
pmx = devm_kzalloc(&pdev->dev, sizeof(*pmx), GFP_KERNEL);
|
|
if (!pmx)
|
|
return -ENOMEM;
|
|
|
|
pmx->dev = &pdev->dev;
|
|
|
|
pmx->base = devm_platform_ioremap_resource(pdev, 0);
|
|
|
|
if (IS_ERR(pmx->base))
|
|
return PTR_ERR(pmx->base);
|
|
|
|
artpec6_pmx_reset(pmx);
|
|
|
|
pmx->pins = artpec6_pins;
|
|
pmx->num_pins = ARRAY_SIZE(artpec6_pins);
|
|
pmx->functions = artpec6_pmx_functions;
|
|
pmx->num_functions = ARRAY_SIZE(artpec6_pmx_functions);
|
|
pmx->pin_groups = artpec6_pin_groups;
|
|
pmx->num_pin_groups = ARRAY_SIZE(artpec6_pin_groups);
|
|
pmx->pctl = pinctrl_register(&artpec6_desc, &pdev->dev, pmx);
|
|
|
|
if (IS_ERR(pmx->pctl)) {
|
|
dev_err(&pdev->dev, "could not register pinctrl driver\n");
|
|
return PTR_ERR(pmx->pctl);
|
|
}
|
|
|
|
platform_set_drvdata(pdev, pmx);
|
|
|
|
dev_info(&pdev->dev, "initialised Axis ARTPEC-6 pinctrl driver\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int artpec6_pmx_remove(struct platform_device *pdev)
|
|
{
|
|
struct artpec6_pmx *pmx = platform_get_drvdata(pdev);
|
|
|
|
pinctrl_unregister(pmx->pctl);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id artpec6_pinctrl_match[] = {
|
|
{ .compatible = "axis,artpec6-pinctrl" },
|
|
{},
|
|
};
|
|
|
|
static struct platform_driver artpec6_pmx_driver = {
|
|
.driver = {
|
|
.name = "artpec6-pinctrl",
|
|
.of_match_table = artpec6_pinctrl_match,
|
|
},
|
|
.probe = artpec6_pmx_probe,
|
|
.remove = artpec6_pmx_remove,
|
|
};
|
|
|
|
static int __init artpec6_pmx_init(void)
|
|
{
|
|
return platform_driver_register(&artpec6_pmx_driver);
|
|
}
|
|
arch_initcall(artpec6_pmx_init);
|