diff options
Diffstat (limited to 'drivers/pinctrl/sh-pfc/pfc-r8a7790.c')
| -rw-r--r-- | drivers/pinctrl/sh-pfc/pfc-r8a7790.c | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a7790.c b/drivers/pinctrl/sh-pfc/pfc-r8a7790.c index 0f4d48f..eed8daa 100644 --- a/drivers/pinctrl/sh-pfc/pfc-r8a7790.c +++ b/drivers/pinctrl/sh-pfc/pfc-r8a7790.c @@ -21,16 +21,21 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ +#include <linux/io.h> #include <linux/kernel.h> #include "core.h" #include "sh_pfc.h" +/* + * All pins assigned to GPIO bank 3 can be used for SD interfaces in + * which case they support both 3.3V and 1.8V signalling. + */ #define CPU_ALL_PORT(fn, sfx) \ PORT_GP_32(0, fn, sfx), \ PORT_GP_30(1, fn, sfx), \ PORT_GP_30(2, fn, sfx), \ - PORT_GP_32(3, fn, sfx), \ + PORT_GP_CFG_32(3, fn, sfx, SH_PFC_PIN_CFG_IO_VOLTAGE), \ PORT_GP_32(4, fn, sfx), \ PORT_GP_32(5, fn, sfx) @@ -4691,6 +4696,47 @@ static const char * const vin3_groups[] = { "vin3_clk", }; +#define IOCTRL6 0x8c + +static int r8a7790_get_io_voltage(struct sh_pfc *pfc, unsigned int pin) +{ + u32 data, mask; + + if (WARN(pin < RCAR_GP_PIN(3, 0) || pin > RCAR_GP_PIN(3, 31), "invalid pin %#x", pin)) + return -EINVAL; + + data = ioread32(pfc->windows->virt + IOCTRL6), + /* Bits in IOCTRL6 are numbered in opposite order to pins */ + mask = 0x80000000 >> (pin & 0x1f); + + return (data & mask) ? 3300 : 1800; +} + +static int r8a7790_set_io_voltage(struct sh_pfc *pfc, unsigned int pin, u16 mV) +{ + u32 data, mask; + + if (WARN(pin < RCAR_GP_PIN(3, 0) || pin > RCAR_GP_PIN(3, 31), "invalid pin %#x", pin)) + return -EINVAL; + + if (mV != 1800 && mV != 3300) + return -EINVAL; + + data = ioread32(pfc->windows->virt + IOCTRL6); + /* Bits in IOCTRL6 are numbered in opposite order to pins */ + mask = 0x80000000 >> (pin & 0x1f); + + if (mV == 3300) + data |= mask; + else + data &= ~mask; + + iowrite32(~data, pfc->windows->virt); /* unlock reg */ + iowrite32(data, pfc->windows->virt + IOCTRL6); + + return 0; +} + static const struct sh_pfc_function pinmux_functions[] = { SH_PFC_FUNCTION(audio_clk), SH_PFC_FUNCTION(avb), @@ -5690,8 +5736,14 @@ static const struct pinmux_cfg_reg pinmux_config_regs[] = { { }, }; +static const struct sh_pfc_soc_operations pinmux_ops = { + .get_io_voltage = r8a7790_get_io_voltage, + .set_io_voltage = r8a7790_set_io_voltage, +}; + const struct sh_pfc_soc_info r8a7790_pinmux_info = { .name = "r8a77900_pfc", + .ops = &pinmux_ops, .unlock_reg = 0xe6060000, /* PMMR */ .function = { PINMUX_FUNCTION_BEGIN, PINMUX_FUNCTION_END }, |