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pinctrl: sh-pfc: r8a7796: Add voltage switch operations for SDHI

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This patch supports the {get,set}_io_voltage operations of SDHI.

This operates the POCCTRL0 register on R8A7796 SoC and makes 1.8v/3.3v
voltage switch.

Based on work by Takeshi Kihara and Wolfram Sang.

Cc: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
This commit is contained in:
Simon Horman 2016-09-08 13:57:33 +02:00 committed by Geert Uytterhoeven
parent 40ade58219
commit c5901bdcbc
1 changed files with 26 additions and 2 deletions
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28
drivers/pinctrl/sh-pfc/pfc-r8a7796.c
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@ -23,8 +23,12 @@
PORT_GP_16(0, fn, sfx), \
PORT_GP_29(1, fn, sfx), \
PORT_GP_15(2, fn, sfx), \
PORT_GP_16(3, fn, sfx), \
PORT_GP_18(4, fn, sfx), \
PORT_GP_CFG_12(3, fn, sfx, SH_PFC_PIN_CFG_IO_VOLTAGE), \
PORT_GP_1(3, 12, fn, sfx), \
PORT_GP_1(3, 13, fn, sfx), \
PORT_GP_1(3, 14, fn, sfx), \
PORT_GP_1(3, 15, fn, sfx), \
PORT_GP_CFG_18(4, fn, sfx, SH_PFC_PIN_CFG_IO_VOLTAGE), \
PORT_GP_26(5, fn, sfx), \
PORT_GP_32(6, fn, sfx), \
PORT_GP_4(7, fn, sfx)
@ -2627,8 +2631,28 @@ static const struct pinmux_cfg_reg pinmux_config_regs[] = {
{ },
};
static int r8a7796_pin_to_pocctrl(struct sh_pfc *pfc, unsigned int pin, u32 *pocctrl)
{
int bit = -EINVAL;
*pocctrl = 0xe6060380;
if (pin >= RCAR_GP_PIN(3, 0) && pin <= RCAR_GP_PIN(3, 11))
bit = pin & 0x1f;
if (pin >= RCAR_GP_PIN(4, 0) && pin <= RCAR_GP_PIN(4, 17))
bit = (pin & 0x1f) + 12;
return bit;
}
static const struct sh_pfc_soc_operations r8a7796_pinmux_ops = {
.pin_to_pocctrl = r8a7796_pin_to_pocctrl,
};
const struct sh_pfc_soc_info r8a7796_pinmux_info = {
.name = "r8a77960_pfc",
.ops = &r8a7796_pinmux_ops,
.unlock_reg = 0xe6060000, /* PMMR */
.function = { PINMUX_FUNCTION_BEGIN, PINMUX_FUNCTION_END },