From: Tomasz Figa Date: Mon, 18 Mar 2013 21:31:53 +0000 (+0100) Subject: pinctrl: samsung: Remove hardcoded register offsets X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=43fc9e7fab903ea3c525c693c5e9bf566d521380;p=linux-beck.git pinctrl: samsung: Remove hardcoded register offsets This patch replaces statically hardcoded register offsets of Exynos SoCs with an array of register offsets in samsung_pin_bank_type struct. Thanks to this change, support for SoCs with other set and order of registers can be added (e.g. S3C24xx and S3C64xx). Signed-off-by: Tomasz Figa Signed-off-by: Linus Walleij --- diff --git a/drivers/pinctrl/pinctrl-exynos.c b/drivers/pinctrl/pinctrl-exynos.c index b5dbb87800fd..8b10b1ac9071 100644 --- a/drivers/pinctrl/pinctrl-exynos.c +++ b/drivers/pinctrl/pinctrl-exynos.c @@ -37,10 +37,12 @@ static struct samsung_pin_bank_type bank_type_off = { .fld_width = { 4, 1, 2, 2, 2, 2, }, + .reg_offset = { 0x00, 0x04, 0x08, 0x0c, 0x10, 0x14, }, }; static struct samsung_pin_bank_type bank_type_alive = { .fld_width = { 4, 1, 2, 2, }, + .reg_offset = { 0x00, 0x04, 0x08, 0x0c, }, }; /* list of external wakeup controllers supported */ @@ -126,7 +128,7 @@ static int exynos_gpio_irq_set_type(struct irq_data *irqd, unsigned int type) con |= trig_type << shift; writel(con, d->virt_base + reg_con); - reg_con = bank->pctl_offset; + reg_con = bank->pctl_offset + bank_type->reg_offset[PINCFG_TYPE_FUNC]; shift = pin * bank_type->fld_width[PINCFG_TYPE_FUNC]; mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1; @@ -309,7 +311,7 @@ static int exynos_wkup_irq_set_type(struct irq_data *irqd, unsigned int type) con |= trig_type << shift; writel(con, d->virt_base + reg_con); - reg_con = bank->pctl_offset; + reg_con = bank->pctl_offset + bank_type->reg_offset[PINCFG_TYPE_FUNC]; shift = pin * bank_type->fld_width[PINCFG_TYPE_FUNC]; mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1; diff --git a/drivers/pinctrl/pinctrl-samsung.c b/drivers/pinctrl/pinctrl-samsung.c index 97dd56024e33..b917ed36fb65 100644 --- a/drivers/pinctrl/pinctrl-samsung.c +++ b/drivers/pinctrl/pinctrl-samsung.c @@ -275,10 +275,6 @@ static void pin_to_reg_bank(struct samsung_pinctrl_drv_data *drvdata, *offset = pin - b->pin_base; if (bank) *bank = b; - - /* some banks have two config registers in a single bank */ - if (*offset * b->func_width > BITS_PER_LONG) - *reg += 4; } /* enable or disable a pinmux function */ @@ -310,11 +306,11 @@ static void samsung_pinmux_setup(struct pinctrl_dev *pctldev, unsigned selector, spin_lock_irqsave(&bank->slock, flags); - data = readl(reg); + data = readl(reg + type->reg_offset[PINCFG_TYPE_FUNC]); data &= ~(mask << shift); if (enable) data |= drvdata->pin_groups[group].func << shift; - writel(data, reg); + writel(data, reg + type->reg_offset[PINCFG_TYPE_FUNC]); spin_unlock_irqrestore(&bank->slock, flags); } @@ -355,7 +351,8 @@ static int samsung_pinmux_gpio_set_direction(struct pinctrl_dev *pctldev, drvdata = pinctrl_dev_get_drvdata(pctldev); pin_offset = offset - bank->pin_base; - reg = drvdata->virt_base + bank->pctl_offset; + reg = drvdata->virt_base + bank->pctl_offset + + type->reg_offset[PINCFG_TYPE_FUNC]; mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1; shift = pin_offset * type->fld_width[PINCFG_TYPE_FUNC]; @@ -401,28 +398,11 @@ static int samsung_pinconf_rw(struct pinctrl_dev *pctldev, unsigned int pin, &pin_offset, &bank); type = bank->type; - switch (cfg_type) { - case PINCFG_TYPE_PUD: - cfg_reg = PUD_REG; - break; - case PINCFG_TYPE_DRV: - cfg_reg = DRV_REG; - break; - case PINCFG_TYPE_CON_PDN: - cfg_reg = CONPDN_REG; - break; - case PINCFG_TYPE_PUD_PDN: - cfg_reg = PUDPDN_REG; - break; - default: - WARN_ON(1); - return -EINVAL; - } - if (cfg_type >= PINCFG_TYPE_NUM || !type->fld_width[cfg_type]) return -EINVAL; width = type->fld_width[cfg_type]; + cfg_reg = type->reg_offset[cfg_type]; spin_lock_irqsave(&bank->slock, flags); @@ -511,11 +491,11 @@ static void samsung_gpio_set(struct gpio_chip *gc, unsigned offset, int value) spin_lock_irqsave(&bank->slock, flags); - data = readl(reg + DAT_REG); + data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]); data &= ~(1 << offset); if (value) data |= 1 << offset; - writel(data, reg + DAT_REG); + writel(data, reg + type->reg_offset[PINCFG_TYPE_DAT]); spin_unlock_irqrestore(&bank->slock, flags); } @@ -526,10 +506,11 @@ static int samsung_gpio_get(struct gpio_chip *gc, unsigned offset) void __iomem *reg; u32 data; struct samsung_pin_bank *bank = gc_to_pin_bank(gc); + struct samsung_pin_bank_type *type = bank->type; reg = bank->drvdata->virt_base + bank->pctl_offset; - data = readl(reg + DAT_REG); + data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]); data >>= offset; data &= 1; return data; diff --git a/drivers/pinctrl/pinctrl-samsung.h b/drivers/pinctrl/pinctrl-samsung.h index 1c590f7e95dd..9efeee862e0d 100644 --- a/drivers/pinctrl/pinctrl-samsung.h +++ b/drivers/pinctrl/pinctrl-samsung.h @@ -25,13 +25,6 @@ #include -/* register offsets within a pin bank */ -#define DAT_REG 0x4 -#define PUD_REG 0x8 -#define DRV_REG 0xC -#define CONPDN_REG 0x10 -#define PUDPDN_REG 0x14 - /* pinmux function number for pin as gpio output line */ #define FUNC_OUTPUT 0x1 @@ -111,9 +104,11 @@ struct samsung_pinctrl_drv_data; /** * struct samsung_pin_bank_type: pin bank type description * @fld_width: widths of configuration bitfields (0 if unavailable) + * @reg_offset: offsets of configuration registers (don't care of width is 0) */ struct samsung_pin_bank_type { u8 fld_width[PINCFG_TYPE_NUM]; + u8 reg_offset[PINCFG_TYPE_NUM]; }; /**