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author | 2021-03-24 09:19:05 +0100 | |
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committer | 2021-03-29 12:20:07 +0200 | |
commit | 132f95016db0a0a0659e99b471a7d3fd0c60f961 (patch) | |
tree | 554d108ac80b2544d18c4f500324e2eb868f158e /drivers/pinctrl | |
parent | dt-bindings: improve BCM6345 GPIO binding documentation (diff) | |
download | linux-132f95016db0a0a0659e99b471a7d3fd0c60f961.tar.gz linux-132f95016db0a0a0659e99b471a7d3fd0c60f961.tar.bz2 linux-132f95016db0a0a0659e99b471a7d3fd0c60f961.zip |
pinctrl: bcm: add bcm63xx base code
Add a helper for registering BCM63XX pin controllers.
Co-developed-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Link: https://lore.kernel.org/r/20210324081923.20379-5-noltari@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r-- | drivers/pinctrl/bcm/Kconfig | 7 | ||||
-rw-r--r-- | drivers/pinctrl/bcm/Makefile | 1 | ||||
-rw-r--r-- | drivers/pinctrl/bcm/pinctrl-bcm63xx.c | 109 | ||||
-rw-r--r-- | drivers/pinctrl/bcm/pinctrl-bcm63xx.h | 43 |
4 files changed, 160 insertions, 0 deletions
diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig index 0ed14de0134c..882f19bdc243 100644 --- a/drivers/pinctrl/bcm/Kconfig +++ b/drivers/pinctrl/bcm/Kconfig @@ -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) diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile index 79d5e49fdd9a..0e3cf9b15c65 100644 --- a/drivers/pinctrl/bcm/Makefile +++ b/drivers/pinctrl/bcm/Makefile @@ -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 diff --git a/drivers/pinctrl/bcm/pinctrl-bcm63xx.c b/drivers/pinctrl/bcm/pinctrl-bcm63xx.c new file mode 100644 index 000000000000..e1285fe2fbc0 --- /dev/null +++ b/drivers/pinctrl/bcm/pinctrl-bcm63xx.c @@ -0,0 +1,109 @@ +// 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; +} diff --git a/drivers/pinctrl/bcm/pinctrl-bcm63xx.h b/drivers/pinctrl/bcm/pinctrl-bcm63xx.h new file mode 100644 index 000000000000..3bdb50021f1b --- /dev/null +++ b/drivers/pinctrl/bcm/pinctrl-bcm63xx.h @@ -0,0 +1,43 @@ +// 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__ */ |