diff options
| -rw-r--r-- | drivers/sh/pfc/pinctrl.c | 165 |
1 files changed, 132 insertions, 33 deletions
diff --git a/drivers/sh/pfc/pinctrl.c b/drivers/sh/pfc/pinctrl.c index 6008328594ff..f62659aa68cc 100644 --- a/drivers/sh/pfc/pinctrl.c +++ b/drivers/sh/pfc/pinctrl.c @@ -14,6 +14,7 @@ #include <linux/sh_pfc.h> #include <linux/err.h> #include <linux/slab.h> +#include <linux/spinlock.h> #include <linux/platform_device.h> #include <linux/pinctrl/consumer.h> #include <linux/pinctrl/pinctrl.h> @@ -25,8 +26,13 @@ struct sh_pfc_pinctrl { struct pinctrl_dev *pctl; struct sh_pfc *pfc; + struct pinmux_gpio **functions; + unsigned int nr_functions; + struct pinctrl_pin_desc *pads; unsigned int nr_pads; + + spinlock_t lock; }; static struct sh_pfc_pinctrl *sh_pfc_pmx; @@ -57,14 +63,30 @@ static struct pinctrl_ops sh_pfc_pinctrl_ops = { .get_group_pins = sh_pfc_get_group_pins, }; +static int sh_pfc_get_functions_count(struct pinctrl_dev *pctldev) +{ + struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + return pmx->nr_functions; +} + +static const char *sh_pfc_get_function_name(struct pinctrl_dev *pctldev, + unsigned selector) +{ + struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + return pmx->functions[selector]->name; +} -/* - * No function support yet - */ static int sh_pfc_get_function_groups(struct pinctrl_dev *pctldev, unsigned func, const char * const **groups, unsigned * const num_groups) { + struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); + + *groups = &pmx->functions[func]->name; + *num_groups = 1; + return 0; } @@ -79,41 +101,50 @@ static void sh_pfc_noop_disable(struct pinctrl_dev *pctldev, unsigned func, { } +static inline int sh_pfc_config_function(struct sh_pfc *pfc, unsigned offset) +{ + if (sh_pfc_config_gpio(pfc, offset, + PINMUX_TYPE_FUNCTION, + GPIO_CFG_DRYRUN) != 0) + return -EINVAL; + + if (sh_pfc_config_gpio(pfc, offset, + PINMUX_TYPE_FUNCTION, + GPIO_CFG_REQ) != 0) + return -EINVAL; + + return 0; +} + static int sh_pfc_gpio_request_enable(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range, unsigned offset) { struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); struct sh_pfc *pfc = pmx->pfc; - struct pinmux_data_reg *dummy; unsigned long flags; - int i, ret, pinmux_type; - - ret = -EINVAL; + int ret, pinmux_type; spin_lock_irqsave(&pfc->lock, flags); - if ((pfc->gpios[offset].flags & PINMUX_FLAG_TYPE) != PINMUX_TYPE_NONE) - goto err; - - /* setup pin function here if no data is associated with pin */ - if (sh_pfc_get_data_reg(pfc, offset, &dummy, &i) != 0) { - pinmux_type = PINMUX_TYPE_FUNCTION; - - if (sh_pfc_config_gpio(pfc, offset, - pinmux_type, - GPIO_CFG_DRYRUN) != 0) - goto err; + pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE; - if (sh_pfc_config_gpio(pfc, offset, - pinmux_type, - GPIO_CFG_REQ) != 0) + switch (pinmux_type) { + case PINMUX_TYPE_FUNCTION: + pr_notice_once("Use of GPIO API for function requests is " + "deprecated, convert to pinctrl\n"); + /* handle for now */ + ret = sh_pfc_config_function(pfc, offset); + if (unlikely(ret < 0)) goto err; - } else - pinmux_type = PINMUX_TYPE_GPIO; - pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE; - pfc->gpios[offset].flags |= pinmux_type; + break; + case PINMUX_TYPE_GPIO: + break; + default: + pr_err("Unsupported mux type (%d), bailing...\n", pinmux_type); + return -ENOTSUPP; + } ret = 0; @@ -138,9 +169,6 @@ static void sh_pfc_gpio_disable_free(struct pinctrl_dev *pctldev, sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE); - pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE; - pfc->gpios[offset].flags |= PINMUX_TYPE_NONE; - spin_unlock_irqrestore(&pfc->lock, flags); } @@ -195,8 +223,8 @@ err: } static struct pinmux_ops sh_pfc_pinmux_ops = { - .get_functions_count = sh_pfc_get_noop_count, - .get_function_name = sh_pfc_get_noop_name, + .get_functions_count = sh_pfc_get_functions_count, + .get_function_name = sh_pfc_get_function_name, .get_function_groups = sh_pfc_get_function_groups, .enable = sh_pfc_noop_enable, .disable = sh_pfc_noop_disable, @@ -208,6 +236,13 @@ static struct pinmux_ops sh_pfc_pinmux_ops = { static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin, unsigned long *config) { + enum pin_config_param param = (enum pin_config_param)(*config); + + switch (param) { + default: + break; + } + return -ENOTSUPP; } @@ -238,19 +273,44 @@ static struct pinctrl_desc sh_pfc_pinctrl_desc = { int sh_pfc_register_pinctrl(struct sh_pfc *pfc) { - sh_pfc_pmx = kmalloc(sizeof(struct sh_pfc_pinctrl), GFP_KERNEL); + sh_pfc_pmx = kzalloc(sizeof(struct sh_pfc_pinctrl), GFP_KERNEL); if (unlikely(!sh_pfc_pmx)) return -ENOMEM; + spin_lock_init(&sh_pfc_pmx->lock); + sh_pfc_pmx->pfc = pfc; return 0; } +static inline void __devinit sh_pfc_map_one_gpio(struct sh_pfc *pfc, + struct sh_pfc_pinctrl *pmx, + struct pinmux_gpio *gpio, + unsigned offset) +{ + struct pinmux_data_reg *dummy; + unsigned long flags; + int bit; + + gpio->flags &= ~PINMUX_FLAG_TYPE; + + if (sh_pfc_get_data_reg(pfc, offset, &dummy, &bit) == 0) + gpio->flags |= PINMUX_TYPE_GPIO; + else { + gpio->flags |= PINMUX_TYPE_FUNCTION; + + spin_lock_irqsave(&pmx->lock, flags); + pmx->nr_functions++; + spin_unlock_irqrestore(&pmx->lock, flags); + } +} + /* pinmux ranges -> pinctrl pin descs */ static int __devinit sh_pfc_map_gpios(struct sh_pfc *pfc, struct sh_pfc_pinctrl *pmx) { + unsigned long flags; int i; pmx->nr_pads = pfc->last_gpio - pfc->first_gpio + 1; @@ -262,6 +322,8 @@ static int __devinit sh_pfc_map_gpios(struct sh_pfc *pfc, return -ENOMEM; } + spin_lock_irqsave(&pfc->lock, flags); + /* * We don't necessarily have a 1:1 mapping between pin and linux * GPIO number, as the latter maps to the associated enum_id. @@ -274,14 +336,43 @@ static int __devinit sh_pfc_map_gpios(struct sh_pfc *pfc, pin->number = pfc->first_gpio + i; pin->name = gpio->name; + + sh_pfc_map_one_gpio(pfc, pmx, gpio, i); } + spin_unlock_irqrestore(&pfc->lock, flags); + sh_pfc_pinctrl_desc.pins = pmx->pads; sh_pfc_pinctrl_desc.npins = pmx->nr_pads; return 0; } +static int __devinit sh_pfc_map_functions(struct sh_pfc *pfc, + struct sh_pfc_pinctrl *pmx) +{ + unsigned long flags; + int i, fn; + + pmx->functions = kzalloc(pmx->nr_functions * sizeof(void *), + GFP_KERNEL); + if (unlikely(!pmx->functions)) + return -ENOMEM; + + spin_lock_irqsave(&pmx->lock, flags); + + for (i = fn = 0; i < pmx->nr_pads; i++) { + struct pinmux_gpio *gpio = pfc->gpios + i; + + if ((gpio->flags & PINMUX_FLAG_TYPE) == PINMUX_TYPE_FUNCTION) + pmx->functions[fn++] = gpio; + } + + spin_unlock_irqrestore(&pmx->lock, flags); + + return 0; +} + static int __devinit sh_pfc_pinctrl_probe(struct platform_device *pdev) { struct sh_pfc *pfc; @@ -296,11 +387,15 @@ static int __devinit sh_pfc_pinctrl_probe(struct platform_device *pdev) if (unlikely(ret != 0)) return ret; + ret = sh_pfc_map_functions(pfc, sh_pfc_pmx); + if (unlikely(ret != 0)) + goto free_pads; + sh_pfc_pmx->pctl = pinctrl_register(&sh_pfc_pinctrl_desc, &pdev->dev, sh_pfc_pmx); if (IS_ERR(sh_pfc_pmx->pctl)) { ret = PTR_ERR(sh_pfc_pmx->pctl); - goto out; + goto free_functions; } sh_pfc_gpio_range.npins = pfc->last_gpio - pfc->first_gpio + 1; @@ -313,9 +408,12 @@ static int __devinit sh_pfc_pinctrl_probe(struct platform_device *pdev) return 0; -out: +free_functions: + kfree(sh_pfc_pmx->functions); +free_pads: kfree(sh_pfc_pmx->pads); kfree(sh_pfc_pmx); + return ret; } @@ -328,6 +426,7 @@ static int __devexit sh_pfc_pinctrl_remove(struct platform_device *pdev) platform_set_drvdata(pdev, NULL); + kfree(sh_pfc_pmx->functions); kfree(sh_pfc_pmx->pads); kfree(sh_pfc_pmx); |