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linux-next/drivers/pinctrl/freescale/pinctrl-imx7ulp.c
Dong Aisheng 26d1f43822 pinctrl: pinctrl-imx7ulp: add gpio_set_direction support 
Add gpio_set_direction support. This makes the driver support
GPIO input/output dynamically change from userspace.

Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Fugang Duan <fugang.duan@nxp.com>
Cc: Bai Ping <ping.bai@nxp.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14 15:01:01 +02:00

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/*
* Copyright (C) 2016 Freescale Semiconductor, Inc.
* Copyright (C) 2017 NXP
*
* Author: Dong Aisheng <aisheng.dong@nxp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/err.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pinctrl/pinctrl.h>
#include "pinctrl-imx.h"
enum imx7ulp_pads {
IMX7ULP_PAD_PTC0 = 0,
IMX7ULP_PAD_PTC1,
IMX7ULP_PAD_PTC2,
IMX7ULP_PAD_PTC3,
IMX7ULP_PAD_PTC4,
IMX7ULP_PAD_PTC5,
IMX7ULP_PAD_PTC6,
IMX7ULP_PAD_PTC7,
IMX7ULP_PAD_PTC8,
IMX7ULP_PAD_PTC9,
IMX7ULP_PAD_PTC10,
IMX7ULP_PAD_PTC11,
IMX7ULP_PAD_PTC12,
IMX7ULP_PAD_PTC13,
IMX7ULP_PAD_PTC14,
IMX7ULP_PAD_PTC15,
IMX7ULP_PAD_PTC16,
IMX7ULP_PAD_PTC17,
IMX7ULP_PAD_PTC18,
IMX7ULP_PAD_PTC19,
IMX7ULP_PAD_RESERVE0,
IMX7ULP_PAD_RESERVE1,
IMX7ULP_PAD_RESERVE2,
IMX7ULP_PAD_RESERVE3,
IMX7ULP_PAD_RESERVE4,
IMX7ULP_PAD_RESERVE5,
IMX7ULP_PAD_RESERVE6,
IMX7ULP_PAD_RESERVE7,
IMX7ULP_PAD_RESERVE8,
IMX7ULP_PAD_RESERVE9,
IMX7ULP_PAD_RESERVE10,
IMX7ULP_PAD_RESERVE11,
IMX7ULP_PAD_PTD0,
IMX7ULP_PAD_PTD1,
IMX7ULP_PAD_PTD2,
IMX7ULP_PAD_PTD3,
IMX7ULP_PAD_PTD4,
IMX7ULP_PAD_PTD5,
IMX7ULP_PAD_PTD6,
IMX7ULP_PAD_PTD7,
IMX7ULP_PAD_PTD8,
IMX7ULP_PAD_PTD9,
IMX7ULP_PAD_PTD10,
IMX7ULP_PAD_PTD11,
IMX7ULP_PAD_RESERVE12,
IMX7ULP_PAD_RESERVE13,
IMX7ULP_PAD_RESERVE14,
IMX7ULP_PAD_RESERVE15,
IMX7ULP_PAD_RESERVE16,
IMX7ULP_PAD_RESERVE17,
IMX7ULP_PAD_RESERVE18,
IMX7ULP_PAD_RESERVE19,
IMX7ULP_PAD_RESERVE20,
IMX7ULP_PAD_RESERVE21,
IMX7ULP_PAD_RESERVE22,
IMX7ULP_PAD_RESERVE23,
IMX7ULP_PAD_RESERVE24,
IMX7ULP_PAD_RESERVE25,
IMX7ULP_PAD_RESERVE26,
IMX7ULP_PAD_RESERVE27,
IMX7ULP_PAD_RESERVE28,
IMX7ULP_PAD_RESERVE29,
IMX7ULP_PAD_RESERVE30,
IMX7ULP_PAD_RESERVE31,
IMX7ULP_PAD_PTE0,
IMX7ULP_PAD_PTE1,
IMX7ULP_PAD_PTE2,
IMX7ULP_PAD_PTE3,
IMX7ULP_PAD_PTE4,
IMX7ULP_PAD_PTE5,
IMX7ULP_PAD_PTE6,
IMX7ULP_PAD_PTE7,
IMX7ULP_PAD_PTE8,
IMX7ULP_PAD_PTE9,
IMX7ULP_PAD_PTE10,
IMX7ULP_PAD_PTE11,
IMX7ULP_PAD_PTE12,
IMX7ULP_PAD_PTE13,
IMX7ULP_PAD_PTE14,
IMX7ULP_PAD_PTE15,
IMX7ULP_PAD_RESERVE32,
IMX7ULP_PAD_RESERVE33,
IMX7ULP_PAD_RESERVE34,
IMX7ULP_PAD_RESERVE35,
IMX7ULP_PAD_RESERVE36,
IMX7ULP_PAD_RESERVE37,
IMX7ULP_PAD_RESERVE38,
IMX7ULP_PAD_RESERVE39,
IMX7ULP_PAD_RESERVE40,
IMX7ULP_PAD_RESERVE41,
IMX7ULP_PAD_RESERVE42,
IMX7ULP_PAD_RESERVE43,
IMX7ULP_PAD_RESERVE44,
IMX7ULP_PAD_RESERVE45,
IMX7ULP_PAD_RESERVE46,
IMX7ULP_PAD_RESERVE47,
IMX7ULP_PAD_PTF0,
IMX7ULP_PAD_PTF1,
IMX7ULP_PAD_PTF2,
IMX7ULP_PAD_PTF3,
IMX7ULP_PAD_PTF4,
IMX7ULP_PAD_PTF5,
IMX7ULP_PAD_PTF6,
IMX7ULP_PAD_PTF7,
IMX7ULP_PAD_PTF8,
IMX7ULP_PAD_PTF9,
IMX7ULP_PAD_PTF10,
IMX7ULP_PAD_PTF11,
IMX7ULP_PAD_PTF12,
IMX7ULP_PAD_PTF13,
IMX7ULP_PAD_PTF14,
IMX7ULP_PAD_PTF15,
IMX7ULP_PAD_PTF16,
IMX7ULP_PAD_PTF17,
IMX7ULP_PAD_PTF18,
IMX7ULP_PAD_PTF19,
};
/* Pad names for the pinmux subsystem */
static const struct pinctrl_pin_desc imx7ulp_pinctrl_pads[] = {
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC0),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC1),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC2),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC3),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC4),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC5),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC6),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC7),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC8),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC9),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC10),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC11),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC12),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC13),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC14),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC15),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC16),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC17),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC18),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC19),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE0),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE1),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE2),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE3),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE4),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE5),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE6),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE7),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE8),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE9),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE10),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE11),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD0),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD1),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD2),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD3),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD4),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD5),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD6),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD7),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD8),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD9),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD10),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD11),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE12),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE13),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE14),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE15),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE16),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE17),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE18),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE19),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE20),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE21),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE22),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE23),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE24),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE25),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE26),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE27),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE28),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE29),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE30),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE31),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE0),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE1),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE2),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE3),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE4),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE5),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE6),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE7),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE8),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE9),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE10),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE11),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE12),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE13),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE14),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE15),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE32),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE33),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE34),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE35),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE36),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE37),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE38),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE39),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE40),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE41),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE42),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE43),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE44),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE45),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE46),
IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE47),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF0),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF1),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF2),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF3),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF4),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF5),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF6),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF7),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF8),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF9),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF10),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF11),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF12),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF13),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF14),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF15),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF16),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF17),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF18),
IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF19),
};
#define BM_OBE_ENABLED BIT(17)
#define BM_IBE_ENABLED BIT(16)
#define BM_LK_ENABLED BIT(15)
#define BM_MUX_MODE 0xf00
#define BP_MUX_MODE 8
#define BM_PULL_ENABLED BIT(1)
struct imx_cfg_params_decode imx7ulp_cfg_decodes[] = {
IMX_CFG_PARAMS_DECODE(PIN_CONFIG_DRIVE_STRENGTH, BIT(6), 6),
IMX_CFG_PARAMS_DECODE(PIN_CONFIG_DRIVE_PUSH_PULL, BIT(5), 5),
IMX_CFG_PARAMS_DECODE(PIN_CONFIG_SLEW_RATE, BIT(2), 2),
IMX_CFG_PARAMS_DECODE(PIN_CONFIG_BIAS_DISABLE, BIT(1), 1),
IMX_CFG_PARAMS_DECODE(PIN_CONFIG_BIAS_PULL_UP, BIT(0), 0),
IMX_CFG_PARAMS_DECODE_INVERT(PIN_CONFIG_DRIVE_OPEN_DRAIN, BIT(5), 5),
IMX_CFG_PARAMS_DECODE_INVERT(PIN_CONFIG_BIAS_PULL_DOWN, BIT(0), 0),
};
static void imx7ulp_cfg_params_fixup(unsigned long *configs,
unsigned int num_configs,
u32 *raw_config)
{
enum pin_config_param param;
u32 param_val;
int i;
/* lock field disabled */
*raw_config &= ~BM_LK_ENABLED;
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(configs[i]);
param_val = pinconf_to_config_argument(configs[i]);
if ((param == PIN_CONFIG_BIAS_PULL_UP) ||
(param == PIN_CONFIG_BIAS_PULL_DOWN)) {
/* pull enabled */
*raw_config |= BM_PULL_ENABLED;
return;
}
}
}
static int imx7ulp_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned offset, bool input)
{
struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
struct imx_pinctrl_soc_info *info = ipctl->info;
const struct imx_pin_reg *pin_reg;
u32 reg;
pin_reg = &info->pin_regs[offset];
if (pin_reg->mux_reg == -1)
return -EINVAL;
reg = readl(ipctl->base + pin_reg->mux_reg);
if (input)
reg = (reg & ~BM_OBE_ENABLED) | BM_IBE_ENABLED;
else
reg = (reg & ~BM_IBE_ENABLED) | BM_OBE_ENABLED;
writel(reg, ipctl->base + pin_reg->mux_reg);
return 0;
}
static struct imx_pinctrl_soc_info imx7ulp_pinctrl_info = {
.pins = imx7ulp_pinctrl_pads,
.npins = ARRAY_SIZE(imx7ulp_pinctrl_pads),
.flags = ZERO_OFFSET_VALID | SHARE_MUX_CONF_REG,
.gpio_set_direction = imx7ulp_pmx_gpio_set_direction,
.mux_mask = BM_MUX_MODE,
.mux_shift = BP_MUX_MODE,
.generic_pinconf = true,
.decodes = imx7ulp_cfg_decodes,
.num_decodes = ARRAY_SIZE(imx7ulp_cfg_decodes),
.fixup = imx7ulp_cfg_params_fixup,
};
static const struct of_device_id imx7ulp_pinctrl_of_match[] = {
{ .compatible = "fsl,imx7ulp-iomuxc1", },
{ /* sentinel */ }
};
static int imx7ulp_pinctrl_probe(struct platform_device *pdev)
{
return imx_pinctrl_probe(pdev, &imx7ulp_pinctrl_info);
}
static struct platform_driver imx7ulp_pinctrl_driver = {
.driver = {
.name = "imx7ulp-pinctrl",
.of_match_table = of_match_ptr(imx7ulp_pinctrl_of_match),
.suppress_bind_attrs = true,
},
.probe = imx7ulp_pinctrl_probe,
};
static int __init imx7ulp_pinctrl_init(void)
{
return platform_driver_register(&imx7ulp_pinctrl_driver);
}
arch_initcall(imx7ulp_pinctrl_init);
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