[PATCH] pinctrl: sh-pfc: r8a7791: Add ADI pinconf support

[Jacopo Mondi]

Add pin configuration support for Gyro-ADC, named ADI on r8a7791 SoC.

The Gyro-ADC supports three different configurations:
a single ADC (adi and adi_b groups), 2 ADCs selectable through a single
channel select signal (adi_chsel1 and adi_chsel1_b groups), up to 4 ADCs
through 2 channel select signals (adi_chsel2 and adi_chsel2_b groups)
and up to 8 ADCs through 3 channel select signals (adi_chsel3 and
adi_chsel3_b groups)

Signed-off-by: Jacopo Mondi <jacopo@xxxxxxxxxx>
---

Compiled only, not tested with an actual ADC.

For reference only, these are the changes introduced by Geert's private
review of first sketch of this patch:
    * separate ADI chsel in 3 overlapping groups:
      the user can now select how many pins to assign to channel selection
      function.

---
 drivers/pinctrl/sh-pfc/pfc-r8a7791.c | 86 ++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)

diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a7791.c b/drivers/pinctrl/sh-pfc/pfc-r8a7791.c
index 7ca37c3..3898747 100644
--- a/drivers/pinctrl/sh-pfc/pfc-r8a7791.c
+++ b/drivers/pinctrl/sh-pfc/pfc-r8a7791.c
@@ -1691,6 +1691,72 @@ static const struct sh_pfc_pin pinmux_pins[] = {
 	PINMUX_GPIO_GP_ALL(),
 };
 
+/* - ADI -------------------------------------------------------------------- */
+static const unsigned int adi_pins[] = {
+	/* ADIDATA, ADICS, CLK*/
+	RCAR_GP_PIN(6, 24), RCAR_GP_PIN(6, 25), RCAR_GP_PIN(6, 26),
+};
+static const unsigned int adi_mux[] = {
+	/* ADIDATA, ADICS, CLK*/
+	ADIDATA_MARK, ADICS_SAMP_MARK, ADICLK_MARK,
+};
+static const unsigned int adi_chsel1_pins[] = {
+	/* CHS 0 */
+	RCAR_GP_PIN(6, 27),
+};
+static const unsigned int adi_chsel1_mux[] = {
+	/* CHS 0 */
+	ADICHS0_MARK, ADICHS1_MARK, ADICHS2_MARK,
+};
+static const unsigned int adi_chsel2_pins[] = {
+	/* CHS 0, 1 */
+	RCAR_GP_PIN(6, 27), RCAR_GP_PIN(6, 28),
+};
+static const unsigned int adi_chsel2_mux[] = {
+	/* CHS 0, 1 */
+	ADICHS0_MARK, ADICHS1_MARK, ADICHS2_MARK,
+};
+static const unsigned int adi_chsel3_pins[] = {
+	/* CHS 0, 1, 2 */
+	RCAR_GP_PIN(6, 27), RCAR_GP_PIN(6, 28), RCAR_GP_PIN(6, 29),
+};
+static const unsigned int adi_chsel3_mux[] = {
+	/* CHS 0, 1, 2 */
+	ADICHS0_MARK, ADICHS1_MARK, ADICHS2_MARK,
+};
+static const unsigned int adi_b_pins[] = {
+	/* ADIDATA B, ADICS B, CLK B */
+	RCAR_GP_PIN(5, 25), RCAR_GP_PIN(5, 26), RCAR_GP_PIN(5, 27),
+};
+static const unsigned int adi_b_mux[] = {
+	/* ADIDATA B, ADICS B, CLK B */
+	ADIDATA_B_MARK, ADICS_SAMP_B_MARK, ADICLK_B_MARK,
+};
+static const unsigned int adi_chsel1_b_pins[] = {
+	/* CHS B 0 */
+	RCAR_GP_PIN(5, 28),
+};
+static const unsigned int adi_chsel1_b_mux[] = {
+	/* CHS B 0 */
+	ADICHS0_B_MARK,
+};
+static const unsigned int adi_chsel2_b_pins[] = {
+	/* CHS B 0, 1 */
+	RCAR_GP_PIN(5, 28), RCAR_GP_PIN(5, 29),
+};
+static const unsigned int adi_chsel2_b_mux[] = {
+	/* CHS B 0, 1 */
+	ADICHS0_B_MARK, ADICHS1_B_MARK,
+};
+static const unsigned int adi_chsel3_b_pins[] = {
+	/* CHS B 0, 1, 2 */
+	RCAR_GP_PIN(5, 28), RCAR_GP_PIN(5, 29), RCAR_GP_PIN(5, 30),
+};
+static const unsigned int adi_chsel3_b_mux[] = {
+	/* CHS B 0, 1, 2 */
+	ADICHS0_B_MARK, ADICHS1_B_MARK, ADICHS2_B_MARK,
+};
+
 /* - Audio Clock ------------------------------------------------------------ */
 static const unsigned int audio_clk_a_pins[] = {
 	/* CLK */
@@ -4343,6 +4409,14 @@ static const unsigned int vin2_clk_mux[] = {
 };
 
 static const struct sh_pfc_pin_group pinmux_groups[] = {
+	SH_PFC_PIN_GROUP(adi),
+	SH_PFC_PIN_GROUP(adi_chsel1),
+	SH_PFC_PIN_GROUP(adi_chsel2),
+	SH_PFC_PIN_GROUP(adi_chsel3),
+	SH_PFC_PIN_GROUP(adi_b),
+	SH_PFC_PIN_GROUP(adi_chsel1_b),
+	SH_PFC_PIN_GROUP(adi_chsel2_b),
+	SH_PFC_PIN_GROUP(adi_chsel3_b),
 	SH_PFC_PIN_GROUP(audio_clk_a),
 	SH_PFC_PIN_GROUP(audio_clk_b),
 	SH_PFC_PIN_GROUP(audio_clk_b_b),
@@ -4687,6 +4761,17 @@ static const struct sh_pfc_pin_group pinmux_groups[] = {
 	SH_PFC_PIN_GROUP(vin2_clk),
 };
 
+static const char * const adi_groups[] = {
+	"adi",
+	"adi_chsel1",
+	"adi_chsel2",
+	"adi_chsel3",
+	"adi_b",
+	"adi_chsel1_b",
+	"adi_chsel2_b",
+	"adi_chsel3_b",
+};
+
 static const char * const audio_clk_groups[] = {
 	"audio_clk_a",
 	"audio_clk_b",
@@ -5192,6 +5277,7 @@ static const char * const vin2_groups[] = {
 };
 
 static const struct sh_pfc_function pinmux_functions[] = {
+	SH_PFC_FUNCTION(adi),
 	SH_PFC_FUNCTION(audio_clk),
 	SH_PFC_FUNCTION(avb),
 	SH_PFC_FUNCTION(can0),
-- 
2.7.4