pinctrl: sh-pfc: r8a7795: Support none GPIO pins with configurable drive-strength

There are pins on the r8a7795 which are not part of a GPIO bank nor
can be muxed between different functions. They do however allow for the
drive-strength to be configured. Add those pins to the list of pins and
to the drive-strength configuration registers.

The pins can now be referred to in DT by function names and their
drive-strength modified.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

1 files changed, 148 insertions, 15 deletions

diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a7795.c b/drivers/pinctrl/sh-pfc/pfc-r8a7795.c
index 2891c3b63e88..a69c5dce89a4 100644
--- a/drivers/pinctrl/sh-pfc/pfc-r8a7795.c
+++ b/drivers/pinctrl/sh-pfc/pfc-r8a7795.c
@@ -523,6 +523,22 @@ MOD_SEL0_2_1		MOD_SEL1_2 \
 			MOD_SEL1_1 \
 			MOD_SEL1_0		MOD_SEL2_0
 
+/*
+ * These pins are not able to be muxed but have other properties
+ * that can be set, such as drive-strength or pull-up/pull-down enable.
+ */
+#define PINMUX_STATIC \
+	FM(QSPI0_SPCLK) FM(QSPI0_SSL) FM(QSPI0_MOSI_IO0) FM(QSPI0_MISO_IO1) \
+	FM(QSPI0_IO2) FM(QSPI0_IO3) \
+	FM(QSPI1_SPCLK) FM(QSPI1_SSL) FM(QSPI1_MOSI_IO0) FM(QSPI1_MISO_IO1) \
+	FM(QSPI1_IO2) FM(QSPI1_IO3) \
+	FM(RPC_INT) FM(RPC_WP) FM(RPC_RESET) \
+	FM(AVB_TX_CTL) FM(AVB_TXC) FM(AVB_TD0) FM(AVB_TD1) FM(AVB_TD2) FM(AVB_TD3) \
+	FM(AVB_RX_CTL) FM(AVB_RXC) FM(AVB_RD0) FM(AVB_RD1) FM(AVB_RD2) FM(AVB_RD3) \
+	FM(AVB_TXCREFCLK) FM(AVB_MDIO) \
+	FM(CLKOUT) FM(PRESETOUT) \
+	FM(DU_DOTCLKIN0) FM(DU_DOTCLKIN1) FM(DU_DOTCLKIN2) FM(DU_DOTCLKIN3) \
+	FM(TMS) FM(TDO) FM(ASEBRK) FM(MLB_REF)
 
 enum {
 	PINMUX_RESERVED = 0,
@@ -548,6 +564,7 @@ enum {
 	PINMUX_GPSR
 	PINMUX_IPSR
 	PINMUX_MOD_SELS
+	PINMUX_STATIC
 	PINMUX_MARK_END,
 #undef F_
 #undef FM
@@ -1412,10 +1429,78 @@ static const u16 pinmux_data[] = {
 	PINMUX_IPSR_MSEL(IP17_7_4,	STP_ISSYNC_0_E,		SEL_SSP1_0_4),
 	PINMUX_IPSR_MSEL(IP17_7_4,	RIF2_D1_B,		SEL_DRIF2_1),
 	PINMUX_IPSR_GPSR(IP17_7_4,	TPU0TO3),
+
+/*
+ * Static pins can not be muxed between different functions but
+ * still needs a mark entry in the pinmux list. Add each static
+ * pin to the list without an associated function. The sh-pfc
+ * core will do the right thing and skip trying to mux then pin
+ * while still applying configuration to it
+ */
+#define FM(x)	PINMUX_DATA(x##_MARK, 0),
+	PINMUX_STATIC
+#undef FM
 };
 
+/*
+ * R8A7795 has 8 banks with 32 PGIOS in each => 256 GPIOs.
+ * Physical layout rows: A - AW, cols: 1 - 39.
+ */
+#define ROW_GROUP_A(r) ('Z' - 'A' + 1 + (r))
+#define PIN_NUMBER(r, c) (((r) - 'A') * 39 + (c) + 300)
+#define PIN_A_NUMBER(r, c) PIN_NUMBER(ROW_GROUP_A(r), c)
+
 static const struct sh_pfc_pin pinmux_pins[] = {
 	PINMUX_GPIO_GP_ALL(),
+
+	/*
+	 * Pins not associated with a GPIO port.
+	 *
+	 * The pin positions are different between different r8a7795
+	 * packages, all that is needed for the pfc driver is a unique
+	 * number for each pin. To this end use the pin layout from
+	 * R-Car H3SiP to calculate a unique number for each pin.
+	 */
+	SH_PFC_PIN_NAMED_CFG('A',  8, AVB_TX_CTL, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('A',  9, AVB_MDIO, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('A', 12, AVB_TXCREFCLK, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('A', 13, AVB_RD0, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('A', 14, AVB_RD2, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('A', 16, AVB_RX_CTL, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('A', 17, AVB_TD2, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('A', 18, AVB_TD0, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('A', 19, AVB_TXC, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('B', 13, AVB_RD1, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('B', 14, AVB_RD3, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('B', 17, AVB_TD3, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('B', 18, AVB_TD1, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('B', 19, AVB_RXC, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('C',  1, PRESETOUT#, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('F',  1, CLKOUT, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('H', 37, MLB_REF, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('V',  3, QSPI1_SPCLK, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('V',  5, QSPI1_SSL, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('V',  6, RPC_WP#, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('V',  7, RPC_RESET#, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('W',  3, QSPI0_SPCLK, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('Y',  3, QSPI0_SSL, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('Y',  6, QSPI0_IO2, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG('Y',  7, RPC_INT#, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('B'),  4, QSPI0_MISO_IO1, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('B'),  6, QSPI0_IO3, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('C'),  3, QSPI1_IO3, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('C'),  5, QSPI0_MOSI_IO0, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('C'),  7, QSPI1_MOSI_IO0, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('D'), 38, FSCLKST#, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('E'),  4, QSPI1_IO2, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('E'),  5, QSPI1_MISO_IO1, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('P'),  7, DU_DOTCLKIN0, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('P'),  8, DU_DOTCLKIN1, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('R'),  7, DU_DOTCLKIN2, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('R'),  8, DU_DOTCLKIN3, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('R'), 30, TMS, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('T'), 28, TDO, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
+	SH_PFC_PIN_NAMED_CFG(ROW_GROUP_A('T'), 30, ASEBRK, SH_PFC_PIN_CFG_DRIVE_STRENGTH),
 };
 
 /* - AUDIO CLOCK ------------------------------------------------------------ */
@@ -4962,10 +5047,45 @@ static const struct pinmux_cfg_reg pinmux_config_regs[] = {
 };
 
 static const struct pinmux_drive_reg pinmux_drive_regs[] = {
+	{ PINMUX_DRIVE_REG("DRVCTRL0", 0xe6060300) {
+		{ PIN_NUMBER('W', 3),   28, 2 },	/* QSPI0_SPCLK */
+		{ PIN_A_NUMBER('C', 5), 24, 2 },	/* QSPI0_MOSI_IO0 */
+		{ PIN_A_NUMBER('B', 4), 20, 2 },	/* QSPI0_MISO_IO1 */
+		{ PIN_NUMBER('Y', 6),   16, 2 },	/* QSPI0_IO2 */
+		{ PIN_A_NUMBER('B', 6), 12, 2 },	/* QSPI0_IO3 */
+		{ PIN_NUMBER('Y', 3),    8, 2 },	/* QSPI0_SSL */
+		{ PIN_NUMBER('V', 3),    4, 2 },	/* QSPI1_SPCLK */
+		{ PIN_A_NUMBER('C', 7),  0, 2 },	/* QSPI1_MOSI_IO0 */
+	} },
+	{ PINMUX_DRIVE_REG("DRVCTRL1", 0xe6060304) {
+		{ PIN_A_NUMBER('E', 5), 28, 2 },	/* QSPI1_MISO_IO1 */
+		{ PIN_A_NUMBER('E', 4), 24, 2 },	/* QSPI1_IO2 */
+		{ PIN_A_NUMBER('C', 3), 20, 2 },	/* QSPI1_IO3 */
+		{ PIN_NUMBER('V', 5),   16, 2 },	/* QSPI1_SSL */
+		{ PIN_NUMBER('Y', 7),   12, 2 },	/* RPC_INT# */
+		{ PIN_NUMBER('V', 6),    8, 2 },	/* RPC_WP# */
+		{ PIN_NUMBER('V', 7),    4, 2 },	/* RPC_RESET# */
+		{ PIN_NUMBER('A', 16),   0, 3 },	/* AVB_RX_CTL */
+	} },
+	{ PINMUX_DRIVE_REG("DRVCTRL2", 0xe6060308) {
+		{ PIN_NUMBER('B', 19),  28, 3 },	/* AVB_RXC */
+		{ PIN_NUMBER('A', 13),  24, 3 },	/* AVB_RD0 */
+		{ PIN_NUMBER('B', 13),  20, 3 },	/* AVB_RD1 */
+		{ PIN_NUMBER('A', 14),  16, 3 },	/* AVB_RD2 */
+		{ PIN_NUMBER('B', 14),  12, 3 },	/* AVB_RD3 */
+		{ PIN_NUMBER('A', 8),    8, 3 },	/* AVB_TX_CTL */
+		{ PIN_NUMBER('A', 19),   4, 3 },	/* AVB_TXC */
+		{ PIN_NUMBER('A', 18),   0, 3 },	/* AVB_TD0 */
+	} },
 	{ PINMUX_DRIVE_REG("DRVCTRL3", 0xe606030c) {
-		{ RCAR_GP_PIN(2,  9),  8, 3 },	/* AVB_MDC */
-		{ RCAR_GP_PIN(2, 10),  4, 3 },	/* AVB_MAGIC */
-		{ RCAR_GP_PIN(2, 11),  0, 3 },	/* AVB_PHY_INT */
+		{ PIN_NUMBER('B', 18),  28, 3 },	/* AVB_TD1 */
+		{ PIN_NUMBER('A', 17),  24, 3 },	/* AVB_TD2 */
+		{ PIN_NUMBER('B', 17),  20, 3 },	/* AVB_TD3 */
+		{ PIN_NUMBER('A', 12),  16, 3 },	/* AVB_TXCREFCLK */
+		{ PIN_NUMBER('A', 9),   12, 3 },	/* AVB_MDIO */
+		{ RCAR_GP_PIN(2,  9),    8, 3 },	/* AVB_MDC */
+		{ RCAR_GP_PIN(2, 10),    4, 3 },	/* AVB_MAGIC */
+		{ RCAR_GP_PIN(2, 11),    0, 3 },	/* AVB_PHY_INT */
 	} },
 	{ PINMUX_DRIVE_REG("DRVCTRL4", 0xe6060310) {
 		{ RCAR_GP_PIN(2, 12), 28, 3 },	/* AVB_LINK */
@@ -5008,6 +5128,7 @@ static const struct pinmux_drive_reg pinmux_drive_regs[] = {
 		{ RCAR_GP_PIN(1, 19),  0, 3 },	/* A19 */
 	} },
 	{ PINMUX_DRIVE_REG("DRVCTRL8", 0xe6060320) {
+		{ PIN_NUMBER('F', 1), 28, 3 },	/* CLKOUT */
 		{ RCAR_GP_PIN(1, 20), 24, 3 },	/* CS0 */
 		{ RCAR_GP_PIN(1, 21), 20, 3 },	/* CS1_A26 */
 		{ RCAR_GP_PIN(1, 22), 16, 3 },	/* BS */
@@ -5018,6 +5139,7 @@ static const struct pinmux_drive_reg pinmux_drive_regs[] = {
 	} },
 	{ PINMUX_DRIVE_REG("DRVCTRL9", 0xe6060324) {
 		{ RCAR_GP_PIN(1, 27), 28, 3 },	/* EX_WAIT0 */
+		{ PIN_NUMBER('C', 1), 24, 3 },	/* PRESETOUT# */
 		{ RCAR_GP_PIN(0,  0), 20, 3 },	/* D0 */
 		{ RCAR_GP_PIN(0,  1), 16, 3 },	/* D1 */
 		{ RCAR_GP_PIN(0,  2), 12, 3 },	/* D2 */
@@ -5036,20 +5158,30 @@ static const struct pinmux_drive_reg pinmux_drive_regs[] = {
 		{ RCAR_GP_PIN(0, 13),  0, 3 },	/* D13 */
 	} },
 	{ PINMUX_DRIVE_REG("DRVCTRL11", 0xe606032c) {
-		{ RCAR_GP_PIN(0, 14), 28, 3 },	/* D14 */
-		{ RCAR_GP_PIN(0, 15), 24, 3 },	/* D15 */
-		{ RCAR_GP_PIN(7,  0), 20, 3 },	/* AVS1 */
-		{ RCAR_GP_PIN(7,  1), 16, 3 },	/* AVS2 */
-		{ RCAR_GP_PIN(7,  2), 12, 3 },	/* HDMI0_CEC */
-		{ RCAR_GP_PIN(7,  3),  8, 3 },	/* HDMI1_CEC */
+		{ RCAR_GP_PIN(0, 14),   28, 3 },	/* D14 */
+		{ RCAR_GP_PIN(0, 15),   24, 3 },	/* D15 */
+		{ RCAR_GP_PIN(7,  0),   20, 3 },	/* AVS1 */
+		{ RCAR_GP_PIN(7,  1),   16, 3 },	/* AVS2 */
+		{ RCAR_GP_PIN(7,  2),   12, 3 },	/* HDMI0_CEC */
+		{ RCAR_GP_PIN(7,  3),    8, 3 },	/* HDMI1_CEC */
+		{ PIN_A_NUMBER('P', 7),  4, 2 },	/* DU_DOTCLKIN0 */
+		{ PIN_A_NUMBER('P', 8),  0, 2 },	/* DU_DOTCLKIN1 */
+	} },
+	{ PINMUX_DRIVE_REG("DRVCTRL12", 0xe6060330) {
+		{ PIN_A_NUMBER('R', 7),  28, 2 },	/* DU_DOTCLKIN2 */
+		{ PIN_A_NUMBER('R', 8),  24, 2 },	/* DU_DOTCLKIN3 */
+		{ PIN_A_NUMBER('D', 38), 20, 2 },	/* FSCLKST# */
+		{ PIN_A_NUMBER('R', 30),  4, 2 },	/* TMS */
 	} },
 	{ PINMUX_DRIVE_REG("DRVCTRL13", 0xe6060334) {
-		{ RCAR_GP_PIN(3,  0), 20, 3 },	/* SD0_CLK */
-		{ RCAR_GP_PIN(3,  1), 16, 3 },	/* SD0_CMD */
-		{ RCAR_GP_PIN(3,  2), 12, 3 },	/* SD0_DAT0 */
-		{ RCAR_GP_PIN(3,  3),  8, 3 },	/* SD0_DAT1 */
-		{ RCAR_GP_PIN(3,  4),  4, 3 },	/* SD0_DAT2 */
-		{ RCAR_GP_PIN(3,  5),  0, 3 },	/* SD0_DAT3 */
+		{ PIN_A_NUMBER('T', 28), 28, 2 },	/* TDO */
+		{ PIN_A_NUMBER('T', 30), 24, 2 },	/* ASEBRK */
+		{ RCAR_GP_PIN(3,  0),    20, 3 },	/* SD0_CLK */
+		{ RCAR_GP_PIN(3,  1),    16, 3 },	/* SD0_CMD */
+		{ RCAR_GP_PIN(3,  2),    12, 3 },	/* SD0_DAT0 */
+		{ RCAR_GP_PIN(3,  3),     8, 3 },	/* SD0_DAT1 */
+		{ RCAR_GP_PIN(3,  4),     4, 3 },	/* SD0_DAT2 */
+		{ RCAR_GP_PIN(3,  5),     0, 3 },	/* SD0_DAT3 */
 	} },
 	{ PINMUX_DRIVE_REG("DRVCTRL14", 0xe6060338) {
 		{ RCAR_GP_PIN(3,  6), 28, 3 },	/* SD1_CLK */
@@ -5118,6 +5250,7 @@ static const struct pinmux_drive_reg pinmux_drive_regs[] = {
 		{ RCAR_GP_PIN(5, 23), 16, 3 },	/* MLB_CLK */
 		{ RCAR_GP_PIN(5, 24), 12, 3 },	/* MLB_SIG */
 		{ RCAR_GP_PIN(5, 25),  8, 3 },	/* MLB_DAT */
+		{ PIN_NUMBER('H', 37),  4, 3 },	/* MLB_REF */
 		{ RCAR_GP_PIN(6,  0),  0, 3 },	/* SSI_SCK01239 */
 	} },
 	{ PINMUX_DRIVE_REG("DRVCTRL21", 0xe6060354) {