// 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; }