From: Laurent Pinchart Date: Mon, 15 Jul 2013 19:10:54 +0000 (+0200) Subject: sh-pfc: Support pins not associated with a GPIO port X-Git-Tag: upstream/snapshot3+hdmi~4441^2~71^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4f82e3ee724f1712f9e84b8802e24ea096a6089f;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git sh-pfc: Support pins not associated with a GPIO port Pins with selectable functions but without a GPIO port can't be named PORT_# or GP_#_#. Add a SH_PFC_PIN_NAMED macro to declare such pins in the pinmux pins array, naming them with the PIN_ prefix followed by the pin physical position. In order to make sure not to register those pins as GPIOs, add a SH_PFC_PIN_CFG_NO_GPIO pin flag to denote pins without a GPIO port. Signed-off-by: Laurent Pinchart Tested-by: Yusuke Goda --- diff --git a/drivers/pinctrl/sh-pfc/core.c b/drivers/pinctrl/sh-pfc/core.c index cb47bce..9e66614bb 100644 --- a/drivers/pinctrl/sh-pfc/core.c +++ b/drivers/pinctrl/sh-pfc/core.c @@ -362,7 +362,10 @@ static int sh_pfc_init_ranges(struct sh_pfc *pfc) return 0; } - /* Count, allocate and fill the ranges. */ + /* Count, allocate and fill the ranges. The PFC SoC data pins array must + * be sorted by pin numbers, and pins without a GPIO port must come + * last. + */ for (i = 1, nr_ranges = 1; i < pfc->info->nr_pins; ++i) { if (pfc->info->pins[i-1].pin != pfc->info->pins[i].pin - 1) nr_ranges++; @@ -378,15 +381,20 @@ static int sh_pfc_init_ranges(struct sh_pfc *pfc) range->start = pfc->info->pins[0].pin; for (i = 1; i < pfc->info->nr_pins; ++i) { - if (pfc->info->pins[i-1].pin != pfc->info->pins[i].pin - 1) { - range->end = pfc->info->pins[i-1].pin; - range++; - range->start = pfc->info->pins[i].pin; - } + if (pfc->info->pins[i-1].pin == pfc->info->pins[i].pin - 1) + continue; + + range->end = pfc->info->pins[i-1].pin; + if (!(pfc->info->pins[i-1].configs & SH_PFC_PIN_CFG_NO_GPIO)) + pfc->nr_gpio_pins = range->end + 1; + + range++; + range->start = pfc->info->pins[i].pin; } range->end = pfc->info->pins[i-1].pin; - pfc->nr_gpio_pins = range->end + 1; + if (!(pfc->info->pins[i-1].configs & SH_PFC_PIN_CFG_NO_GPIO)) + pfc->nr_gpio_pins = range->end + 1; return 0; } diff --git a/drivers/pinctrl/sh-pfc/gpio.c b/drivers/pinctrl/sh-pfc/gpio.c index 78fcb80..04bf52b 100644 --- a/drivers/pinctrl/sh-pfc/gpio.c +++ b/drivers/pinctrl/sh-pfc/gpio.c @@ -364,10 +364,16 @@ int sh_pfc_register_gpiochip(struct sh_pfc *pfc) pfc->gpio = chip; - /* Register the GPIO to pin mappings. */ + /* Register the GPIO to pin mappings. As pins with GPIO ports must come + * first in the ranges, skip the pins without GPIO ports by stopping at + * the first range that contains such a pin. + */ for (i = 0; i < pfc->nr_ranges; ++i) { const struct sh_pfc_pin_range *range = &pfc->ranges[i]; + if (range->start >= pfc->nr_gpio_pins) + break; + ret = gpiochip_add_pin_range(&chip->gpio_chip, dev_name(pfc->dev), range->start, range->start, diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a7778.c b/drivers/pinctrl/sh-pfc/pfc-r8a7778.c index 40aecfe..428d2a6 100644 --- a/drivers/pinctrl/sh-pfc/pfc-r8a7778.c +++ b/drivers/pinctrl/sh-pfc/pfc-r8a7778.c @@ -1254,16 +1254,21 @@ static const u16 pinmux_data[] = { PINMUX_IPSR_MSEL(IP10_24_22, CAN_CLK_C, SEL_CANCLK_C), }; -static struct sh_pfc_pin pinmux_pins[] = { - PINMUX_GPIO_GP_ALL(), -}; - /* Pin numbers for pins without a corresponding GPIO port number are computed * from the row and column numbers with a 1000 offset to avoid collisions with * GPIO port numbers. */ #define PIN_NUMBER(row, col) (1000+((row)-1)*25+(col)-1) +static struct sh_pfc_pin pinmux_pins[] = { + PINMUX_GPIO_GP_ALL(), + + /* Pins not associated with a GPIO port */ + SH_PFC_PIN_NAMED(3, 20, C20), + SH_PFC_PIN_NAMED(20, 1, T1), + SH_PFC_PIN_NAMED(25, 2, Y2), +}; + /* - macro */ #define SH_PFC_PINS(name, args...) \ static const unsigned int name ##_pins[] = { args } diff --git a/drivers/pinctrl/sh-pfc/pfc-sh73a0.c b/drivers/pinctrl/sh-pfc/pfc-sh73a0.c index 1f4dbe4..6417be5 100644 --- a/drivers/pinctrl/sh-pfc/pfc-sh73a0.c +++ b/drivers/pinctrl/sh-pfc/pfc-sh73a0.c @@ -1173,6 +1173,12 @@ static const u16 pinmux_data[] = { #define SH73A0_PIN_IO_PU_PD(pin) SH_PFC_PIN_CFG(pin, __IO | __PUD) #define SH73A0_PIN_O(pin) SH_PFC_PIN_CFG(pin, __O) +/* Pin numbers for pins without a corresponding GPIO port number are computed + * from the row and column numbers with a 1000 offset to avoid collisions with + * GPIO port numbers. + */ +#define PIN_NUMBER(row, col) (1000+((row)-1)*34+(col)-1) + static struct sh_pfc_pin pinmux_pins[] = { /* Table 25-1 (I/O and Pull U/D) */ SH73A0_PIN_I_PD(0), @@ -1444,13 +1450,10 @@ static struct sh_pfc_pin pinmux_pins[] = { SH73A0_PIN_O(307), SH73A0_PIN_I_PU(308), SH73A0_PIN_O(309), -}; -/* Pin numbers for pins without a corresponding GPIO port number are computed - * from the row and column numbers with a 1000 offset to avoid collisions with - * GPIO port numbers. - */ -#define PIN_NUMBER(row, col) (1000+((row)-1)*34+(col)-1) + /* Pins not associated with a GPIO port */ + SH_PFC_PIN_NAMED(6, 26, F26), +}; /* - BSC -------------------------------------------------------------------- */ static const unsigned int bsc_data_0_7_pins[] = { diff --git a/drivers/pinctrl/sh-pfc/sh_pfc.h b/drivers/pinctrl/sh-pfc/sh_pfc.h index 2469b35..11bd0d9 100644 --- a/drivers/pinctrl/sh-pfc/sh_pfc.h +++ b/drivers/pinctrl/sh-pfc/sh_pfc.h @@ -26,6 +26,7 @@ enum { #define SH_PFC_PIN_CFG_OUTPUT (1 << 1) #define SH_PFC_PIN_CFG_PULL_UP (1 << 2) #define SH_PFC_PIN_CFG_PULL_DOWN (1 << 3) +#define SH_PFC_PIN_CFG_NO_GPIO (1 << 31) struct sh_pfc_pin { u16 pin; @@ -266,6 +267,14 @@ struct sh_pfc_soc_info { .configs = cfgs, \ } +/* SH_PFC_PIN_NAMED - Expand to a sh_pfc_pin entry with the given name */ +#define SH_PFC_PIN_NAMED(row, col, _name) \ + { \ + .pin = PIN_NUMBER(row, col), \ + .name = __stringify(PIN_##_name), \ + .configs = SH_PFC_PIN_CFG_NO_GPIO, \ + } + /* PINMUX_DATA_ALL - Expand to a list of PORT_name_DATA, PORT_name_FN0, * PORT_name_OUT, PORT_name_IN marks */