Commit 132f9501 authored by Álvaro Fernández Rojas's avatar Álvaro Fernández Rojas Committed by Linus Walleij
Browse files

pinctrl: bcm: add bcm63xx base code 



Add a helper for registering BCM63XX pin controllers.

Co-developed-by: default avatarJonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: default avatarJonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: default avatarÁlvaro Fernández Rojas <noltari@gmail.com>
Link: https://lore.kernel.org/r/20210324081923.20379-5-noltari@gmail.com


Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent fb9da17b

drivers/pinctrl/bcm/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -29,6 +29,13 @@ config PINCTRL_BCM2835 
	help

	   Say Y here to enable the Broadcom BCM2835 GPIO driver.



config PINCTRL_BCM63XX

	bool

	select GENERIC_PINCONF

	select GPIO_REGMAP

	select PINCONF

	select PINMUX



config PINCTRL_IPROC_GPIO

	bool "Broadcom iProc GPIO (with PINCONF) driver"

	depends on OF_GPIO && (ARCH_BCM_IPROC || COMPILE_TEST)

drivers/pinctrl/bcm/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 


obj-$(CONFIG_PINCTRL_BCM281XX)		+= pinctrl-bcm281xx.o

obj-$(CONFIG_PINCTRL_BCM2835)		+= pinctrl-bcm2835.o

obj-$(CONFIG_PINCTRL_BCM63XX)		+= pinctrl-bcm63xx.o

obj-$(CONFIG_PINCTRL_IPROC_GPIO)	+= pinctrl-iproc-gpio.o

obj-$(CONFIG_PINCTRL_CYGNUS_MUX)	+= pinctrl-cygnus-mux.o

obj-$(CONFIG_PINCTRL_NS)		+= pinctrl-ns.o

drivers/pinctrl/bcm/pinctrl-bcm63xx.c

0 → 100644
+109 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0+

/*

 * Driver for BCM63xx GPIO unit (pinctrl + GPIO)

 *

 * Copyright (C) 2021 Álvaro Fernández Rojas <noltari@gmail.com>

 * Copyright (C) 2016 Jonas Gorski <jonas.gorski@gmail.com>

 */



#include <linux/gpio/regmap.h>

#include <linux/mfd/syscon.h>

#include <linux/mod_devicetable.h>

#include <linux/of.h>

#include <linux/platform_device.h>



#include "pinctrl-bcm63xx.h"



#define BCM63XX_BANK_SIZE	4



#define BCM63XX_DIROUT_REG	0x04

#define BCM63XX_DATA_REG	0x0c



static int bcm63xx_reg_mask_xlate(struct gpio_regmap *gpio,

				  unsigned int base, unsigned int offset,

				  unsigned int *reg, unsigned int *mask)

{

	unsigned int line = offset % BCM63XX_BANK_GPIOS;

	unsigned int stride = offset / BCM63XX_BANK_GPIOS;



	*reg = base - stride * BCM63XX_BANK_SIZE;

	*mask = BIT(line);



	return 0;

}



static const struct of_device_id bcm63xx_gpio_of_match[] = {

	{ .compatible = "brcm,bcm6318-gpio", },

	{ .compatible = "brcm,bcm6328-gpio", },

	{ .compatible = "brcm,bcm6358-gpio", },

	{ .compatible = "brcm,bcm6362-gpio", },

	{ .compatible = "brcm,bcm6368-gpio", },

	{ .compatible = "brcm,bcm63268-gpio", },

	{ /* sentinel */ }

};



static int bcm63xx_gpio_probe(struct device *dev, struct device_node *node,

			      const struct bcm63xx_pinctrl_soc *soc,

			      struct bcm63xx_pinctrl *pc)

{

	struct gpio_regmap_config grc = {0};



	grc.parent = dev;

	grc.fwnode = &node->fwnode;

	grc.ngpio = soc->ngpios;

	grc.ngpio_per_reg = BCM63XX_BANK_GPIOS;

	grc.regmap = pc->regs;

	grc.reg_dat_base = BCM63XX_DATA_REG;

	grc.reg_dir_out_base = BCM63XX_DIROUT_REG;

	grc.reg_set_base = BCM63XX_DATA_REG;

	grc.reg_mask_xlate = bcm63xx_reg_mask_xlate;



	return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(dev, &grc));

}



int bcm63xx_pinctrl_probe(struct platform_device *pdev,

			  const struct bcm63xx_pinctrl_soc *soc,

			  void *driver_data)

{

	struct device *dev = &pdev->dev;

	struct bcm63xx_pinctrl *pc;

	struct device_node *node;

	int err;



	pc = devm_kzalloc(dev, sizeof(*pc), GFP_KERNEL);

	if (!pc)

		return -ENOMEM;



	platform_set_drvdata(pdev, pc);



	pc->dev = dev;

	pc->driver_data = driver_data;



	pc->regs = syscon_node_to_regmap(dev->parent->of_node);

	if (IS_ERR(pc->regs))

		return PTR_ERR(pc->regs);



	pc->pctl_desc.name = dev_name(dev);

	pc->pctl_desc.pins = soc->pins;

	pc->pctl_desc.npins = soc->npins;

	pc->pctl_desc.pctlops = soc->pctl_ops;

	pc->pctl_desc.pmxops = soc->pmx_ops;

	pc->pctl_desc.owner = THIS_MODULE;



	pc->pctl_dev = devm_pinctrl_register(dev, &pc->pctl_desc, pc);

	if (IS_ERR(pc->pctl_dev))

		return PTR_ERR(pc->pctl_dev);



	for_each_child_of_node(dev->parent->of_node, node) {

		if (of_match_node(bcm63xx_gpio_of_match, node)) {

			err = bcm63xx_gpio_probe(dev, node, soc, pc);

			if (err) {

				dev_err(dev, "could not add GPIO chip\n");

				of_node_put(node);

				return err;

			}

		}

	}



	return 0;

}

drivers/pinctrl/bcm/pinctrl-bcm63xx.h

0 → 100644
+43 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0+

/*

 * Copyright (C) 2021 Álvaro Fernández Rojas <noltari@gmail.com>

 * Copyright (C) 2016 Jonas Gorski <jonas.gorski@gmail.com>

 */



#ifndef __PINCTRL_BCM63XX_H__

#define __PINCTRL_BCM63XX_H__



#include <linux/pinctrl/pinctrl.h>



#define BCM63XX_BANK_GPIOS 32



struct bcm63xx_pinctrl_soc {

	struct pinctrl_ops *pctl_ops;

	struct pinmux_ops *pmx_ops;



	const struct pinctrl_pin_desc *pins;

	unsigned npins;



	unsigned int ngpios;

};



struct bcm63xx_pinctrl {

	struct device *dev;

	struct regmap *regs;



	struct pinctrl_desc pctl_desc;

	struct pinctrl_dev *pctl_dev;



	void *driver_data;

};



static inline unsigned int bcm63xx_bank_pin(unsigned int pin)

{

	return pin % BCM63XX_BANK_GPIOS;

}



int bcm63xx_pinctrl_probe(struct platform_device *pdev,

			  const struct bcm63xx_pinctrl_soc *soc,

			  void *driver_data);



#endif /* __PINCTRL_BCM63XX_H__ */