Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Baruch Siach | 1613 | 97.40% | 1 | 8.33% |
Julia Lawall | 11 | 0.66% | 2 | 16.67% |
Linus Walleij | 8 | 0.48% | 2 | 16.67% |
Paul Gortmaker | 7 | 0.42% | 1 | 8.33% |
Kees Cook | 6 | 0.36% | 1 | 8.33% |
Laxman Dewangan | 4 | 0.24% | 1 | 8.33% |
Yue haibing | 2 | 0.12% | 1 | 8.33% |
Jonas Gorski | 2 | 0.12% | 1 | 8.33% |
Thomas Gleixner | 2 | 0.12% | 1 | 8.33% |
Irina Tirdea | 1 | 0.06% | 1 | 8.33% |
Total | 1656 | 12 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for Conexant Digicolor General Purpose Pin Mapping * * Author: Baruch Siach <baruch@tkos.co.il> * * Copyright (C) 2015 Paradox Innovation Ltd. * * TODO: * - GPIO interrupt support * - Pin pad configuration (pull up/down, strength) */ #include <linux/init.h> #include <linux/platform_device.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/io.h> #include <linux/gpio/driver.h> #include <linux/spinlock.h> #include <linux/pinctrl/machine.h> #include <linux/pinctrl/pinconf.h> #include <linux/pinctrl/pinconf-generic.h> #include <linux/pinctrl/pinctrl.h> #include <linux/pinctrl/pinmux.h> #include "pinctrl-utils.h" #define DRIVER_NAME "pinctrl-digicolor" #define GP_CLIENTSEL(clct) ((clct)*8 + 0x20) #define GP_DRIVE0(clct) (GP_CLIENTSEL(clct) + 2) #define GP_OUTPUT0(clct) (GP_CLIENTSEL(clct) + 3) #define GP_INPUT(clct) (GP_CLIENTSEL(clct) + 6) #define PIN_COLLECTIONS ('R' - 'A' + 1) #define PINS_PER_COLLECTION 8 #define PINS_COUNT (PIN_COLLECTIONS * PINS_PER_COLLECTION) struct dc_pinmap { void __iomem *regs; struct device *dev; struct pinctrl_dev *pctl; struct pinctrl_desc *desc; const char *pin_names[PINS_COUNT]; struct gpio_chip chip; spinlock_t lock; }; static int dc_get_groups_count(struct pinctrl_dev *pctldev) { return PINS_COUNT; } static const char *dc_get_group_name(struct pinctrl_dev *pctldev, unsigned selector) { struct dc_pinmap *pmap = pinctrl_dev_get_drvdata(pctldev); /* Exactly one group per pin */ return pmap->desc->pins[selector].name; } static int dc_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector, const unsigned **pins, unsigned *num_pins) { struct dc_pinmap *pmap = pinctrl_dev_get_drvdata(pctldev); *pins = &pmap->desc->pins[selector].number; *num_pins = 1; return 0; } static const struct pinctrl_ops dc_pinctrl_ops = { .get_groups_count = dc_get_groups_count, .get_group_name = dc_get_group_name, .get_group_pins = dc_get_group_pins, .dt_node_to_map = pinconf_generic_dt_node_to_map_pin, .dt_free_map = pinctrl_utils_free_map, }; static const char *const dc_functions[] = { "gpio", "client_a", "client_b", "client_c", }; static int dc_get_functions_count(struct pinctrl_dev *pctldev) { return ARRAY_SIZE(dc_functions); } static const char *dc_get_fname(struct pinctrl_dev *pctldev, unsigned selector) { return dc_functions[selector]; } static int dc_get_groups(struct pinctrl_dev *pctldev, unsigned selector, const char * const **groups, unsigned * const num_groups) { struct dc_pinmap *pmap = pinctrl_dev_get_drvdata(pctldev); *groups = pmap->pin_names; *num_groups = PINS_COUNT; return 0; } static void dc_client_sel(int pin_num, int *reg, int *bit) { *bit = (pin_num % PINS_PER_COLLECTION) * 2; *reg = GP_CLIENTSEL(pin_num/PINS_PER_COLLECTION); if (*bit >= PINS_PER_COLLECTION) { *bit -= PINS_PER_COLLECTION; *reg += 1; } } static int dc_set_mux(struct pinctrl_dev *pctldev, unsigned selector, unsigned group) { struct dc_pinmap *pmap = pinctrl_dev_get_drvdata(pctldev); int bit_off, reg_off; u8 reg; dc_client_sel(group, ®_off, &bit_off); reg = readb_relaxed(pmap->regs + reg_off); reg &= ~(3 << bit_off); reg |= (selector << bit_off); writeb_relaxed(reg, pmap->regs + reg_off); return 0; } static int dc_pmx_request_gpio(struct pinctrl_dev *pcdev, struct pinctrl_gpio_range *range, unsigned offset) { struct dc_pinmap *pmap = pinctrl_dev_get_drvdata(pcdev); int bit_off, reg_off; u8 reg; dc_client_sel(offset, ®_off, &bit_off); reg = readb_relaxed(pmap->regs + reg_off); if ((reg & (3 << bit_off)) != 0) return -EBUSY; return 0; } static const struct pinmux_ops dc_pmxops = { .get_functions_count = dc_get_functions_count, .get_function_name = dc_get_fname, .get_function_groups = dc_get_groups, .set_mux = dc_set_mux, .gpio_request_enable = dc_pmx_request_gpio, }; static int dc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) { struct dc_pinmap *pmap = gpiochip_get_data(chip); int reg_off = GP_DRIVE0(gpio/PINS_PER_COLLECTION); int bit_off = gpio % PINS_PER_COLLECTION; u8 drive; unsigned long flags; spin_lock_irqsave(&pmap->lock, flags); drive = readb_relaxed(pmap->regs + reg_off); drive &= ~BIT(bit_off); writeb_relaxed(drive, pmap->regs + reg_off); spin_unlock_irqrestore(&pmap->lock, flags); return 0; } static void dc_gpio_set(struct gpio_chip *chip, unsigned gpio, int value); static int dc_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int value) { struct dc_pinmap *pmap = gpiochip_get_data(chip); int reg_off = GP_DRIVE0(gpio/PINS_PER_COLLECTION); int bit_off = gpio % PINS_PER_COLLECTION; u8 drive; unsigned long flags; dc_gpio_set(chip, gpio, value); spin_lock_irqsave(&pmap->lock, flags); drive = readb_relaxed(pmap->regs + reg_off); drive |= BIT(bit_off); writeb_relaxed(drive, pmap->regs + reg_off); spin_unlock_irqrestore(&pmap->lock, flags); return 0; } static int dc_gpio_get(struct gpio_chip *chip, unsigned gpio) { struct dc_pinmap *pmap = gpiochip_get_data(chip); int reg_off = GP_INPUT(gpio/PINS_PER_COLLECTION); int bit_off = gpio % PINS_PER_COLLECTION; u8 input; input = readb_relaxed(pmap->regs + reg_off); return !!(input & BIT(bit_off)); } static void dc_gpio_set(struct gpio_chip *chip, unsigned gpio, int value) { struct dc_pinmap *pmap = gpiochip_get_data(chip); int reg_off = GP_OUTPUT0(gpio/PINS_PER_COLLECTION); int bit_off = gpio % PINS_PER_COLLECTION; u8 output; unsigned long flags; spin_lock_irqsave(&pmap->lock, flags); output = readb_relaxed(pmap->regs + reg_off); if (value) output |= BIT(bit_off); else output &= ~BIT(bit_off); writeb_relaxed(output, pmap->regs + reg_off); spin_unlock_irqrestore(&pmap->lock, flags); } static int dc_gpiochip_add(struct dc_pinmap *pmap, struct device_node *np) { struct gpio_chip *chip = &pmap->chip; int ret; chip->label = DRIVER_NAME; chip->parent = pmap->dev; chip->request = gpiochip_generic_request; chip->free = gpiochip_generic_free; chip->direction_input = dc_gpio_direction_input; chip->direction_output = dc_gpio_direction_output; chip->get = dc_gpio_get; chip->set = dc_gpio_set; chip->base = -1; chip->ngpio = PINS_COUNT; chip->of_node = np; chip->of_gpio_n_cells = 2; spin_lock_init(&pmap->lock); ret = gpiochip_add_data(chip, pmap); if (ret < 0) return ret; ret = gpiochip_add_pin_range(chip, dev_name(pmap->dev), 0, 0, PINS_COUNT); if (ret < 0) { gpiochip_remove(chip); return ret; } return 0; } static int dc_pinctrl_probe(struct platform_device *pdev) { struct dc_pinmap *pmap; struct pinctrl_pin_desc *pins; struct pinctrl_desc *pctl_desc; char *pin_names; int name_len = strlen("GP_xx") + 1; int i, j; pmap = devm_kzalloc(&pdev->dev, sizeof(*pmap), GFP_KERNEL); if (!pmap) return -ENOMEM; pmap->regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(pmap->regs)) return PTR_ERR(pmap->regs); pins = devm_kcalloc(&pdev->dev, PINS_COUNT, sizeof(*pins), GFP_KERNEL); if (!pins) return -ENOMEM; pin_names = devm_kcalloc(&pdev->dev, PINS_COUNT, name_len, GFP_KERNEL); if (!pin_names) return -ENOMEM; for (i = 0; i < PIN_COLLECTIONS; i++) { for (j = 0; j < PINS_PER_COLLECTION; j++) { int pin_id = i*PINS_PER_COLLECTION + j; char *name = &pin_names[pin_id * name_len]; snprintf(name, name_len, "GP_%c%c", 'A'+i, '0'+j); pins[pin_id].number = pin_id; pins[pin_id].name = name; pmap->pin_names[pin_id] = name; } } pctl_desc = devm_kzalloc(&pdev->dev, sizeof(*pctl_desc), GFP_KERNEL); if (!pctl_desc) return -ENOMEM; pctl_desc->name = DRIVER_NAME, pctl_desc->owner = THIS_MODULE, pctl_desc->pctlops = &dc_pinctrl_ops, pctl_desc->pmxops = &dc_pmxops, pctl_desc->npins = PINS_COUNT; pctl_desc->pins = pins; pmap->desc = pctl_desc; pmap->dev = &pdev->dev; pmap->pctl = devm_pinctrl_register(&pdev->dev, pctl_desc, pmap); if (IS_ERR(pmap->pctl)) { dev_err(&pdev->dev, "pinctrl driver registration failed\n"); return PTR_ERR(pmap->pctl); } return dc_gpiochip_add(pmap, pdev->dev.of_node); } static const struct of_device_id dc_pinctrl_ids[] = { { .compatible = "cnxt,cx92755-pinctrl" }, { /* sentinel */ } }; static struct platform_driver dc_pinctrl_driver = { .driver = { .name = DRIVER_NAME, .of_match_table = dc_pinctrl_ids, .suppress_bind_attrs = true, }, .probe = dc_pinctrl_probe, }; builtin_platform_driver(dc_pinctrl_driver);
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