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pinctrl: sh-pfc: r8a7795: Support none GPIO pins with configurable dr…
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…ive-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>
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Niklas Söderlund authored and Geert Uytterhoeven committed Nov 16, 2016
1 parent 1ce56ae commit ea9c740
Showing 1 changed file with 148 additions and 15 deletions.
163 changes: 148 additions & 15 deletions drivers/pinctrl/sh-pfc/pfc-r8a7795.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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,
Expand All @@ -548,6 +564,7 @@ enum {
PINMUX_GPSR
PINMUX_IPSR
PINMUX_MOD_SELS
PINMUX_STATIC
PINMUX_MARK_END,
#undef F_
#undef FM
Expand Down Expand Up @@ -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 ------------------------------------------------------------ */
Expand Down Expand Up @@ -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 */
Expand Down Expand Up @@ -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 */
Expand All @@ -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 */
Expand All @@ -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 */
Expand Down Expand Up @@ -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) {
Expand Down

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