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Commit c5901bdc authored by Simon Horman's avatar Simon Horman Committed by Geert Uytterhoeven
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pinctrl: sh-pfc: r8a7796: Add voltage switch operations for SDHI 



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: default avatarSimon Horman <horms+renesas@verge.net.au>
Reviewed-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
parent 40ade582

drivers/pinctrl/sh-pfc/pfc-r8a7796.c

+26 −2
Original line number Diff line number Diff line
@@ -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 },