Hi Niklas,
Thank you for thr patch.
On Thursday 03 Nov 2016 16:34:21 Niklas Söderlund wrote:
> There is a bug in the r8a7795 bias code where a WARN() is trigged
> anytime a pin from PUEN0/PUD0is accessed.
>
> # cat /sys/kernel/debug/pinctrl/e6060000.pfc/pinconf-pins
>
> WARNING: CPU: 2 PID: 2391 at drivers/pinctrl/sh-pfc/pfc-r8a7795.c:5364
> r8a7795_pinmux_get_bias+0xbc/0xc8 [..]
> Call trace:
> [<ffff0000083c442c>] r8a7795_pinmux_get_bias+0xbc/0xc8
> [<ffff0000083c37f4>] sh_pfc_pinconf_get+0x194/0x270
> [<ffff0000083b0768>] pin_config_get_for_pin+0x20/0x30
> [<ffff0000083b11e8>] pinconf_generic_dump_one+0x168/0x188
> [<ffff0000083b144c>] pinconf_generic_dump_pins+0x5c/0x98
> [<ffff0000083b0628>] pinconf_pins_show+0xc8/0x128
> [<ffff0000081fe3bc>] seq_read+0x16c/0x420
> [<ffff00000831a110>] full_proxy_read+0x58/0x88
> [<ffff0000081d7ad4>] __vfs_read+0x1c/0xf8
> [<ffff0000081d8874>] vfs_read+0x84/0x148
> [<ffff0000081d9d64>] SyS_read+0x44/0xa0
> [<ffff000008082f4c>] __sys_trace_return+0x0/0x4
>
> This is due to the WARN() check if the reg field of the pullups struct
> is zero, and this should be 0 for pins controlled by the PUEN0/PUD0
> registers. Change the layout of the pullups struct to embed the pin
> number inside the struct and loop over it to fetch the correct
> information or WARN() if no pin is found.
This lowers the memory consumption at the cost of increased CPU usage. Given
that the get/set bias functions are not part of a critical path I'm fine with
that. We could possibly optimize the implementation by using a dichotomic
search, but I don't think that's needed at the moment.
I can foresee the r8a7795_pin_to_bias_data() function being used for other
Gen3 SoCs. Could you move it to the core, and move the WARN_ON_ONCE() from the
caller to the function ? It would be great if you could also convert r8a7778
to use this new method.
> Fixes: 560655247b627ac7 ("pinctrl: sh-pfc: r8a7795: Add bias pinconf
> support") Signed-off-by: Niklas Söderlund
> <niklas.soderlund+renesas@xxxxxxxxxxxx>
> ---
> drivers/pinctrl/sh-pfc/pfc-r8a7795.c | 350 ++++++++++++++++---------------
> 1 file changed, 180 insertions(+), 170 deletions(-)
>
> diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a7795.c
> b/drivers/pinctrl/sh-pfc/pfc-r8a7795.c index 2e8cc2a..69e1f31 100644
> --- a/drivers/pinctrl/sh-pfc/pfc-r8a7795.c
> +++ b/drivers/pinctrl/sh-pfc/pfc-r8a7795.c
> @@ -5189,171 +5189,187 @@ static int r8a7795_pin_to_pocctrl(struct sh_pfc
> *pfc, unsigned int pin, u32 *poc #define PU6 0x18
>
> static const struct {
> + u16 pin;
> u16 reg : 11;
> u16 bit : 5;
> } pullups[] = {
> - [RCAR_GP_PIN(2, 11)] = { PU0, 31 }, /* AVB_PHY_INT */
> - [RCAR_GP_PIN(2, 10)] = { PU0, 30 }, /* AVB_MAGIC */
> - [RCAR_GP_PIN(2, 9)] = { PU0, 29 }, /* AVB_MDC */
> -
> - [RCAR_GP_PIN(1, 19)] = { PU1, 31 }, /* A19 */
> - [RCAR_GP_PIN(1, 18)] = { PU1, 30 }, /* A18 */
> - [RCAR_GP_PIN(1, 17)] = { PU1, 29 }, /* A17 */
> - [RCAR_GP_PIN(1, 16)] = { PU1, 28 }, /* A16 */
> - [RCAR_GP_PIN(1, 15)] = { PU1, 27 }, /* A15 */
> - [RCAR_GP_PIN(1, 14)] = { PU1, 26 }, /* A14 */
> - [RCAR_GP_PIN(1, 13)] = { PU1, 25 }, /* A13 */
> - [RCAR_GP_PIN(1, 12)] = { PU1, 24 }, /* A12 */
> - [RCAR_GP_PIN(1, 11)] = { PU1, 23 }, /* A11 */
> - [RCAR_GP_PIN(1, 10)] = { PU1, 22 }, /* A10 */
> - [RCAR_GP_PIN(1, 9)] = { PU1, 21 }, /* A9 */
> - [RCAR_GP_PIN(1, 8)] = { PU1, 20 }, /* A8 */
> - [RCAR_GP_PIN(1, 7)] = { PU1, 19 }, /* A7 */
> - [RCAR_GP_PIN(1, 6)] = { PU1, 18 }, /* A6 */
> - [RCAR_GP_PIN(1, 5)] = { PU1, 17 }, /* A5 */
> - [RCAR_GP_PIN(1, 4)] = { PU1, 16 }, /* A4 */
> - [RCAR_GP_PIN(1, 3)] = { PU1, 15 }, /* A3 */
> - [RCAR_GP_PIN(1, 2)] = { PU1, 14 }, /* A2 */
> - [RCAR_GP_PIN(1, 1)] = { PU1, 13 }, /* A1 */
> - [RCAR_GP_PIN(1, 0)] = { PU1, 12 }, /* A0 */
> - [RCAR_GP_PIN(2, 8)] = { PU1, 11 }, /* PWM2_A */
> - [RCAR_GP_PIN(2, 7)] = { PU1, 10 }, /* PWM1_A */
> - [RCAR_GP_PIN(2, 6)] = { PU1, 9 }, /* PWM0 */
> - [RCAR_GP_PIN(2, 5)] = { PU1, 8 }, /* IRQ5 */
> - [RCAR_GP_PIN(2, 4)] = { PU1, 7 }, /* IRQ4 */
> - [RCAR_GP_PIN(2, 3)] = { PU1, 6 }, /* IRQ3 */
> - [RCAR_GP_PIN(2, 2)] = { PU1, 5 }, /* IRQ2 */
> - [RCAR_GP_PIN(2, 1)] = { PU1, 4 }, /* IRQ1 */
> - [RCAR_GP_PIN(2, 0)] = { PU1, 3 }, /* IRQ0 */
> - [RCAR_GP_PIN(2, 14)] = { PU1, 2 }, /* AVB_AVTP_CAPTURE_A */
> - [RCAR_GP_PIN(2, 13)] = { PU1, 1 }, /* AVB_AVTP_MATCH_A */
> - [RCAR_GP_PIN(2, 12)] = { PU1, 0 }, /* AVB_LINK */
> -
> - [RCAR_GP_PIN(7, 3)] = { PU2, 29 }, /* HDMI1_CEC */
> - [RCAR_GP_PIN(7, 2)] = { PU2, 28 }, /* HDMI0_CEC */
> - [RCAR_GP_PIN(7, 1)] = { PU2, 27 }, /* AVS2 */
> - [RCAR_GP_PIN(7, 0)] = { PU2, 26 }, /* AVS1 */
> - [RCAR_GP_PIN(0, 15)] = { PU2, 25 }, /* D15 */
> - [RCAR_GP_PIN(0, 14)] = { PU2, 24 }, /* D14 */
> - [RCAR_GP_PIN(0, 13)] = { PU2, 23 }, /* D13 */
> - [RCAR_GP_PIN(0, 12)] = { PU2, 22 }, /* D12 */
> - [RCAR_GP_PIN(0, 11)] = { PU2, 21 }, /* D11 */
> - [RCAR_GP_PIN(0, 10)] = { PU2, 20 }, /* D10 */
> - [RCAR_GP_PIN(0, 9)] = { PU2, 19 }, /* D9 */
> - [RCAR_GP_PIN(0, 8)] = { PU2, 18 }, /* D8 */
> - [RCAR_GP_PIN(0, 7)] = { PU2, 17 }, /* D7 */
> - [RCAR_GP_PIN(0, 6)] = { PU2, 16 }, /* D6 */
> - [RCAR_GP_PIN(0, 5)] = { PU2, 15 }, /* D5 */
> - [RCAR_GP_PIN(0, 4)] = { PU2, 14 }, /* D4 */
> - [RCAR_GP_PIN(0, 3)] = { PU2, 13 }, /* D3 */
> - [RCAR_GP_PIN(0, 2)] = { PU2, 12 }, /* D2 */
> - [RCAR_GP_PIN(0, 1)] = { PU2, 11 }, /* D1 */
> - [RCAR_GP_PIN(0, 0)] = { PU2, 10 }, /* D0 */
> - [RCAR_GP_PIN(1, 27)] = { PU2, 8 }, /* EX_WAIT0_A */
> - [RCAR_GP_PIN(1, 26)] = { PU2, 7 }, /* WE1_N */
> - [RCAR_GP_PIN(1, 25)] = { PU2, 6 }, /* WE0_N */
> - [RCAR_GP_PIN(1, 24)] = { PU2, 5 }, /* RD_WR_N */
> - [RCAR_GP_PIN(1, 23)] = { PU2, 4 }, /* RD_N */
> - [RCAR_GP_PIN(1, 22)] = { PU2, 3 }, /* BS_N */
> - [RCAR_GP_PIN(1, 21)] = { PU2, 2 }, /* CS1_N_A26 */
> - [RCAR_GP_PIN(1, 20)] = { PU2, 1 }, /* CS0_N */
> -
> - [RCAR_GP_PIN(4, 9)] = { PU3, 31 }, /* SD3_DAT0 */
> - [RCAR_GP_PIN(4, 8)] = { PU3, 30 }, /* SD3_CMD */
> - [RCAR_GP_PIN(4, 7)] = { PU3, 29 }, /* SD3_CLK */
> - [RCAR_GP_PIN(4, 6)] = { PU3, 28 }, /* SD2_DS */
> - [RCAR_GP_PIN(4, 5)] = { PU3, 27 }, /* SD2_DAT3 */
> - [RCAR_GP_PIN(4, 4)] = { PU3, 26 }, /* SD2_DAT2 */
> - [RCAR_GP_PIN(4, 3)] = { PU3, 25 }, /* SD2_DAT1 */
> - [RCAR_GP_PIN(4, 2)] = { PU3, 24 }, /* SD2_DAT0 */
> - [RCAR_GP_PIN(4, 1)] = { PU3, 23 }, /* SD2_CMD */
> - [RCAR_GP_PIN(4, 0)] = { PU3, 22 }, /* SD2_CLK */
> - [RCAR_GP_PIN(3, 11)] = { PU3, 21 }, /* SD1_DAT3 */
> - [RCAR_GP_PIN(3, 10)] = { PU3, 20 }, /* SD1_DAT2 */
> - [RCAR_GP_PIN(3, 9)] = { PU3, 19 }, /* SD1_DAT1 */
> - [RCAR_GP_PIN(3, 8)] = { PU3, 18 }, /* SD1_DAT0 */
> - [RCAR_GP_PIN(3, 7)] = { PU3, 17 }, /* SD1_CMD */
> - [RCAR_GP_PIN(3, 6)] = { PU3, 16 }, /* SD1_CLK */
> - [RCAR_GP_PIN(3, 5)] = { PU3, 15 }, /* SD0_DAT3 */
> - [RCAR_GP_PIN(3, 4)] = { PU3, 14 }, /* SD0_DAT2 */
> - [RCAR_GP_PIN(3, 3)] = { PU3, 13 }, /* SD0_DAT1 */
> - [RCAR_GP_PIN(3, 2)] = { PU3, 12 }, /* SD0_DAT0 */
> - [RCAR_GP_PIN(3, 1)] = { PU3, 11 }, /* SD0_CMD */
> - [RCAR_GP_PIN(3, 0)] = { PU3, 10 }, /* SD0_CLK */
> -
> - [RCAR_GP_PIN(5, 19)] = { PU4, 31 }, /* MSIOF0_SS1 */
> - [RCAR_GP_PIN(5, 18)] = { PU4, 30 }, /* MSIOF0_SYNC */
> - [RCAR_GP_PIN(5, 17)] = { PU4, 29 }, /* MSIOF0_SCK */
> - [RCAR_GP_PIN(5, 16)] = { PU4, 28 }, /* HRTS0_N */
> - [RCAR_GP_PIN(5, 15)] = { PU4, 27 }, /* HCTS0_N */
> - [RCAR_GP_PIN(5, 14)] = { PU4, 26 }, /* HTX0 */
> - [RCAR_GP_PIN(5, 13)] = { PU4, 25 }, /* HRX0 */
> - [RCAR_GP_PIN(5, 12)] = { PU4, 24 }, /* HSCK0 */
> - [RCAR_GP_PIN(5, 11)] = { PU4, 23 }, /* RX2_A */
> - [RCAR_GP_PIN(5, 10)] = { PU4, 22 }, /* TX2_A */
> - [RCAR_GP_PIN(5, 9)] = { PU4, 21 }, /* SCK2 */
> - [RCAR_GP_PIN(5, 8)] = { PU4, 20 }, /* RTS1_N_TANS */
> - [RCAR_GP_PIN(5, 7)] = { PU4, 19 }, /* CTS1_N */
> - [RCAR_GP_PIN(5, 6)] = { PU4, 18 }, /* TX1_A */
> - [RCAR_GP_PIN(5, 5)] = { PU4, 17 }, /* RX1_A */
> - [RCAR_GP_PIN(5, 4)] = { PU4, 16 }, /* RTS0_N_TANS */
> - [RCAR_GP_PIN(5, 3)] = { PU4, 15 }, /* CTS0_N */
> - [RCAR_GP_PIN(5, 2)] = { PU4, 14 }, /* TX0 */
> - [RCAR_GP_PIN(5, 1)] = { PU4, 13 }, /* RX0 */
> - [RCAR_GP_PIN(5, 0)] = { PU4, 12 }, /* SCK0 */
> - [RCAR_GP_PIN(3, 15)] = { PU4, 11 }, /* SD1_WP */
> - [RCAR_GP_PIN(3, 14)] = { PU4, 10 }, /* SD1_CD */
> - [RCAR_GP_PIN(3, 13)] = { PU4, 9 }, /* SD0_WP */
> - [RCAR_GP_PIN(3, 12)] = { PU4, 8 }, /* SD0_CD */
> - [RCAR_GP_PIN(4, 17)] = { PU4, 7 }, /* SD3_DS */
> - [RCAR_GP_PIN(4, 16)] = { PU4, 6 }, /* SD3_DAT7 */
> - [RCAR_GP_PIN(4, 15)] = { PU4, 5 }, /* SD3_DAT6 */
> - [RCAR_GP_PIN(4, 14)] = { PU4, 4 }, /* SD3_DAT5 */
> - [RCAR_GP_PIN(4, 13)] = { PU4, 3 }, /* SD3_DAT4 */
> - [RCAR_GP_PIN(4, 12)] = { PU4, 2 }, /* SD3_DAT3 */
> - [RCAR_GP_PIN(4, 11)] = { PU4, 1 }, /* SD3_DAT2 */
> - [RCAR_GP_PIN(4, 10)] = { PU4, 0 }, /* SD3_DAT1 */
> -
> - [RCAR_GP_PIN(6, 24)] = { PU5, 31 }, /* USB0_PWEN */
> - [RCAR_GP_PIN(6, 23)] = { PU5, 30 }, /* AUDIO_CLKB_B */
> - [RCAR_GP_PIN(6, 22)] = { PU5, 29 }, /* AUDIO_CLKA_A */
> - [RCAR_GP_PIN(6, 21)] = { PU5, 28 }, /* SSI_SDATA9_A */
> - [RCAR_GP_PIN(6, 20)] = { PU5, 27 }, /* SSI_SDATA8 */
> - [RCAR_GP_PIN(6, 19)] = { PU5, 26 }, /* SSI_SDATA7 */
> - [RCAR_GP_PIN(6, 18)] = { PU5, 25 }, /* SSI_WS78 */
> - [RCAR_GP_PIN(6, 17)] = { PU5, 24 }, /* SSI_SCK78 */
> - [RCAR_GP_PIN(6, 16)] = { PU5, 23 }, /* SSI_SDATA6 */
> - [RCAR_GP_PIN(6, 15)] = { PU5, 22 }, /* SSI_WS6 */
> - [RCAR_GP_PIN(6, 14)] = { PU5, 21 }, /* SSI_SCK6 */
> - [RCAR_GP_PIN(6, 13)] = { PU5, 20 }, /* SSI_SDATA5 */
> - [RCAR_GP_PIN(6, 12)] = { PU5, 19 }, /* SSI_WS5 */
> - [RCAR_GP_PIN(6, 11)] = { PU5, 18 }, /* SSI_SCK5 */
> - [RCAR_GP_PIN(6, 10)] = { PU5, 17 }, /* SSI_SDATA4 */
> - [RCAR_GP_PIN(6, 9)] = { PU5, 16 }, /* SSI_WS4 */
> - [RCAR_GP_PIN(6, 8)] = { PU5, 15 }, /* SSI_SCK4 */
> - [RCAR_GP_PIN(6, 7)] = { PU5, 14 }, /* SSI_SDATA3 */
> - [RCAR_GP_PIN(6, 6)] = { PU5, 13 }, /* SSI_WS34 */
> - [RCAR_GP_PIN(6, 5)] = { PU5, 12 }, /* SSI_SCK34 */
> - [RCAR_GP_PIN(6, 4)] = { PU5, 11 }, /* SSI_SDATA2_A */
> - [RCAR_GP_PIN(6, 3)] = { PU5, 10 }, /* SSI_SDATA1_A */
> - [RCAR_GP_PIN(6, 2)] = { PU5, 9 }, /* SSI_SDATA0 */
> - [RCAR_GP_PIN(6, 1)] = { PU5, 8 }, /* SSI_WS01239 */
> - [RCAR_GP_PIN(6, 0)] = { PU5, 7 }, /* SSI_SCK01239 */
> - [RCAR_GP_PIN(5, 25)] = { PU5, 5 }, /* MLB_DAT */
> - [RCAR_GP_PIN(5, 24)] = { PU5, 4 }, /* MLB_SIG */
> - [RCAR_GP_PIN(5, 23)] = { PU5, 3 }, /* MLB_CLK */
> - [RCAR_GP_PIN(5, 22)] = { PU5, 2 }, /* MSIOF0_RXD */
> - [RCAR_GP_PIN(5, 21)] = { PU5, 1 }, /* MSIOF0_SS2 */
> - [RCAR_GP_PIN(5, 20)] = { PU5, 0 }, /* MSIOF0_TXD */
> -
> - [RCAR_GP_PIN(6, 31)] = { PU6, 6 }, /* USB31_OVC */
> - [RCAR_GP_PIN(6, 30)] = { PU6, 5 }, /* USB31_PWEN */
> - [RCAR_GP_PIN(6, 29)] = { PU6, 4 }, /* USB30_OVC */
> - [RCAR_GP_PIN(6, 28)] = { PU6, 3 }, /* USB30_PWEN */
> - [RCAR_GP_PIN(6, 27)] = { PU6, 2 }, /* USB1_OVC */
> - [RCAR_GP_PIN(6, 26)] = { PU6, 1 }, /* USB1_PWEN */
> - [RCAR_GP_PIN(6, 25)] = { PU6, 0 }, /* USB0_OVC */
> -};
> + { RCAR_GP_PIN(2, 11), PU0, 31 }, /* AVB_PHY_INT */
> + { RCAR_GP_PIN(2, 10), PU0, 30 }, /* AVB_MAGIC */
> + { RCAR_GP_PIN(2, 9), PU0, 29 }, /* AVB_MDC */
> +
> + { RCAR_GP_PIN(1, 19), PU1, 31 }, /* A19 */
> + { RCAR_GP_PIN(1, 18), PU1, 30 }, /* A18 */
> + { RCAR_GP_PIN(1, 17), PU1, 29 }, /* A17 */
> + { RCAR_GP_PIN(1, 16), PU1, 28 }, /* A16 */
> + { RCAR_GP_PIN(1, 15), PU1, 27 }, /* A15 */
> + { RCAR_GP_PIN(1, 14), PU1, 26 }, /* A14 */
> + { RCAR_GP_PIN(1, 13), PU1, 25 }, /* A13 */
> + { RCAR_GP_PIN(1, 12), PU1, 24 }, /* A12 */
> + { RCAR_GP_PIN(1, 11), PU1, 23 }, /* A11 */
> + { RCAR_GP_PIN(1, 10), PU1, 22 }, /* A10 */
> + { RCAR_GP_PIN(1, 9), PU1, 21 }, /* A9 */
> + { RCAR_GP_PIN(1, 8), PU1, 20 }, /* A8 */
> + { RCAR_GP_PIN(1, 7), PU1, 19 }, /* A7 */
> + { RCAR_GP_PIN(1, 6), PU1, 18 }, /* A6 */
> + { RCAR_GP_PIN(1, 5), PU1, 17 }, /* A5 */
> + { RCAR_GP_PIN(1, 4), PU1, 16 }, /* A4 */
> + { RCAR_GP_PIN(1, 3), PU1, 15 }, /* A3 */
> + { RCAR_GP_PIN(1, 2), PU1, 14 }, /* A2 */
> + { RCAR_GP_PIN(1, 1), PU1, 13 }, /* A1 */
> + { RCAR_GP_PIN(1, 0), PU1, 12 }, /* A0 */
> + { RCAR_GP_PIN(2, 8), PU1, 11 }, /* PWM2_A */
> + { RCAR_GP_PIN(2, 7), PU1, 10 }, /* PWM1_A */
> + { RCAR_GP_PIN(2, 6), PU1, 9 }, /* PWM0 */
> + { RCAR_GP_PIN(2, 5), PU1, 8 }, /* IRQ5 */
> + { RCAR_GP_PIN(2, 4), PU1, 7 }, /* IRQ4 */
> + { RCAR_GP_PIN(2, 3), PU1, 6 }, /* IRQ3 */
> + { RCAR_GP_PIN(2, 2), PU1, 5 }, /* IRQ2 */
> + { RCAR_GP_PIN(2, 1), PU1, 4 }, /* IRQ1 */
> + { RCAR_GP_PIN(2, 0), PU1, 3 }, /* IRQ0 */
> + { RCAR_GP_PIN(2, 14), PU1, 2 }, /* AVB_AVTP_CAPTURE_A */
> + { RCAR_GP_PIN(2, 13), PU1, 1 }, /* AVB_AVTP_MATCH_A */
> + { RCAR_GP_PIN(2, 12), PU1, 0 }, /* AVB_LINK */
> +
> + { RCAR_GP_PIN(7, 3), PU2, 29 }, /* HDMI1_CEC */
> + { RCAR_GP_PIN(7, 2), PU2, 28 }, /* HDMI0_CEC */
> + { RCAR_GP_PIN(7, 1), PU2, 27 }, /* AVS2 */
> + { RCAR_GP_PIN(7, 0), PU2, 26 }, /* AVS1 */
> + { RCAR_GP_PIN(0, 15), PU2, 25 }, /* D15 */
> + { RCAR_GP_PIN(0, 14), PU2, 24 }, /* D14 */
> + { RCAR_GP_PIN(0, 13), PU2, 23 }, /* D13 */
> + { RCAR_GP_PIN(0, 12), PU2, 22 }, /* D12 */
> + { RCAR_GP_PIN(0, 11), PU2, 21 }, /* D11 */
> + { RCAR_GP_PIN(0, 10), PU2, 20 }, /* D10 */
> + { RCAR_GP_PIN(0, 9), PU2, 19 }, /* D9 */
> + { RCAR_GP_PIN(0, 8), PU2, 18 }, /* D8 */
> + { RCAR_GP_PIN(0, 7), PU2, 17 }, /* D7 */
> + { RCAR_GP_PIN(0, 6), PU2, 16 }, /* D6 */
> + { RCAR_GP_PIN(0, 5), PU2, 15 }, /* D5 */
> + { RCAR_GP_PIN(0, 4), PU2, 14 }, /* D4 */
> + { RCAR_GP_PIN(0, 3), PU2, 13 }, /* D3 */
> + { RCAR_GP_PIN(0, 2), PU2, 12 }, /* D2 */
> + { RCAR_GP_PIN(0, 1), PU2, 11 }, /* D1 */
> + { RCAR_GP_PIN(0, 0), PU2, 10 }, /* D0 */
> + { RCAR_GP_PIN(1, 27), PU2, 8 }, /* EX_WAIT0_A */
> + { RCAR_GP_PIN(1, 26), PU2, 7 }, /* WE1_N */
> + { RCAR_GP_PIN(1, 25), PU2, 6 }, /* WE0_N */
> + { RCAR_GP_PIN(1, 24), PU2, 5 }, /* RD_WR_N */
> + { RCAR_GP_PIN(1, 23), PU2, 4 }, /* RD_N */
> + { RCAR_GP_PIN(1, 22), PU2, 3 }, /* BS_N */
> + { RCAR_GP_PIN(1, 21), PU2, 2 }, /* CS1_N_A26 */
> + { RCAR_GP_PIN(1, 20), PU2, 1 }, /* CS0_N */
> +
> + { RCAR_GP_PIN(4, 9), PU3, 31 }, /* SD3_DAT0 */
> + { RCAR_GP_PIN(4, 8), PU3, 30 }, /* SD3_CMD */
> + { RCAR_GP_PIN(4, 7), PU3, 29 }, /* SD3_CLK */
> + { RCAR_GP_PIN(4, 6), PU3, 28 }, /* SD2_DS */
> + { RCAR_GP_PIN(4, 5), PU3, 27 }, /* SD2_DAT3 */
> + { RCAR_GP_PIN(4, 4), PU3, 26 }, /* SD2_DAT2 */
> + { RCAR_GP_PIN(4, 3), PU3, 25 }, /* SD2_DAT1 */
> + { RCAR_GP_PIN(4, 2), PU3, 24 }, /* SD2_DAT0 */
> + { RCAR_GP_PIN(4, 1), PU3, 23 }, /* SD2_CMD */
> + { RCAR_GP_PIN(4, 0), PU3, 22 }, /* SD2_CLK */
> + { RCAR_GP_PIN(3, 11), PU3, 21 }, /* SD1_DAT3 */
> + { RCAR_GP_PIN(3, 10), PU3, 20 }, /* SD1_DAT2 */
> + { RCAR_GP_PIN(3, 9), PU3, 19 }, /* SD1_DAT1 */
> + { RCAR_GP_PIN(3, 8), PU3, 18 }, /* SD1_DAT0 */
> + { RCAR_GP_PIN(3, 7), PU3, 17 }, /* SD1_CMD */
> + { RCAR_GP_PIN(3, 6), PU3, 16 }, /* SD1_CLK */
> + { RCAR_GP_PIN(3, 5), PU3, 15 }, /* SD0_DAT3 */
> + { RCAR_GP_PIN(3, 4), PU3, 14 }, /* SD0_DAT2 */
> + { RCAR_GP_PIN(3, 3), PU3, 13 }, /* SD0_DAT1 */
> + { RCAR_GP_PIN(3, 2), PU3, 12 }, /* SD0_DAT0 */
> + { RCAR_GP_PIN(3, 1), PU3, 11 }, /* SD0_CMD */
> + { RCAR_GP_PIN(3, 0), PU3, 10 }, /* SD0_CLK */
> +
> + { RCAR_GP_PIN(5, 19), PU4, 31 }, /* MSIOF0_SS1 */
> + { RCAR_GP_PIN(5, 18), PU4, 30 }, /* MSIOF0_SYNC */
> + { RCAR_GP_PIN(5, 17), PU4, 29 }, /* MSIOF0_SCK */
> + { RCAR_GP_PIN(5, 16), PU4, 28 }, /* HRTS0_N */
> + { RCAR_GP_PIN(5, 15), PU4, 27 }, /* HCTS0_N */
> + { RCAR_GP_PIN(5, 14), PU4, 26 }, /* HTX0 */
> + { RCAR_GP_PIN(5, 13), PU4, 25 }, /* HRX0 */
> + { RCAR_GP_PIN(5, 12), PU4, 24 }, /* HSCK0 */
> + { RCAR_GP_PIN(5, 11), PU4, 23 }, /* RX2_A */
> + { RCAR_GP_PIN(5, 10), PU4, 22 }, /* TX2_A */
> + { RCAR_GP_PIN(5, 9), PU4, 21 }, /* SCK2 */
> + { RCAR_GP_PIN(5, 8), PU4, 20 }, /* RTS1_N_TANS */
> + { RCAR_GP_PIN(5, 7), PU4, 19 }, /* CTS1_N */
> + { RCAR_GP_PIN(5, 6), PU4, 18 }, /* TX1_A */
> + { RCAR_GP_PIN(5, 5), PU4, 17 }, /* RX1_A */
> + { RCAR_GP_PIN(5, 4), PU4, 16 }, /* RTS0_N_TANS */
> + { RCAR_GP_PIN(5, 3), PU4, 15 }, /* CTS0_N */
> + { RCAR_GP_PIN(5, 2), PU4, 14 }, /* TX0 */
> + { RCAR_GP_PIN(5, 1), PU4, 13 }, /* RX0 */
> + { RCAR_GP_PIN(5, 0), PU4, 12 }, /* SCK0 */
> + { RCAR_GP_PIN(3, 15), PU4, 11 }, /* SD1_WP */
> + { RCAR_GP_PIN(3, 14), PU4, 10 }, /* SD1_CD */
> + { RCAR_GP_PIN(3, 13), PU4, 9 }, /* SD0_WP */
> + { RCAR_GP_PIN(3, 12), PU4, 8 }, /* SD0_CD */
> + { RCAR_GP_PIN(4, 17), PU4, 7 }, /* SD3_DS */
> + { RCAR_GP_PIN(4, 16), PU4, 6 }, /* SD3_DAT7 */
> + { RCAR_GP_PIN(4, 15), PU4, 5 }, /* SD3_DAT6 */
> + { RCAR_GP_PIN(4, 14), PU4, 4 }, /* SD3_DAT5 */
> + { RCAR_GP_PIN(4, 13), PU4, 3 }, /* SD3_DAT4 */
> + { RCAR_GP_PIN(4, 12), PU4, 2 }, /* SD3_DAT3 */
> + { RCAR_GP_PIN(4, 11), PU4, 1 }, /* SD3_DAT2 */
> + { RCAR_GP_PIN(4, 10), PU4, 0 }, /* SD3_DAT1 */
> +
> + { RCAR_GP_PIN(6, 24), PU5, 31 }, /* USB0_PWEN */
> + { RCAR_GP_PIN(6, 23), PU5, 30 }, /* AUDIO_CLKB_B */
> + { RCAR_GP_PIN(6, 22), PU5, 29 }, /* AUDIO_CLKA_A */
> + { RCAR_GP_PIN(6, 21), PU5, 28 }, /* SSI_SDATA9_A */
> + { RCAR_GP_PIN(6, 20), PU5, 27 }, /* SSI_SDATA8 */
> + { RCAR_GP_PIN(6, 19), PU5, 26 }, /* SSI_SDATA7 */
> + { RCAR_GP_PIN(6, 18), PU5, 25 }, /* SSI_WS78 */
> + { RCAR_GP_PIN(6, 17), PU5, 24 }, /* SSI_SCK78 */
> + { RCAR_GP_PIN(6, 16), PU5, 23 }, /* SSI_SDATA6 */
> + { RCAR_GP_PIN(6, 15), PU5, 22 }, /* SSI_WS6 */
> + { RCAR_GP_PIN(6, 14), PU5, 21 }, /* SSI_SCK6 */
> + { RCAR_GP_PIN(6, 13), PU5, 20 }, /* SSI_SDATA5 */
> + { RCAR_GP_PIN(6, 12), PU5, 19 }, /* SSI_WS5 */
> + { RCAR_GP_PIN(6, 11), PU5, 18 }, /* SSI_SCK5 */
> + { RCAR_GP_PIN(6, 10), PU5, 17 }, /* SSI_SDATA4 */
> + { RCAR_GP_PIN(6, 9), PU5, 16 }, /* SSI_WS4 */
> + { RCAR_GP_PIN(6, 8), PU5, 15 }, /* SSI_SCK4 */
> + { RCAR_GP_PIN(6, 7), PU5, 14 }, /* SSI_SDATA3 */
> + { RCAR_GP_PIN(6, 6), PU5, 13 }, /* SSI_WS34 */
> + { RCAR_GP_PIN(6, 5), PU5, 12 }, /* SSI_SCK34 */
> + { RCAR_GP_PIN(6, 4), PU5, 11 }, /* SSI_SDATA2_A */
> + { RCAR_GP_PIN(6, 3), PU5, 10 }, /* SSI_SDATA1_A */
> + { RCAR_GP_PIN(6, 2), PU5, 9 }, /* SSI_SDATA0 */
> + { RCAR_GP_PIN(6, 1), PU5, 8 }, /* SSI_WS01239 */
> + { RCAR_GP_PIN(6, 0), PU5, 7 }, /* SSI_SCK01239 */
> + { RCAR_GP_PIN(5, 25), PU5, 5 }, /* MLB_DAT */
> + { RCAR_GP_PIN(5, 24), PU5, 4 }, /* MLB_SIG */
> + { RCAR_GP_PIN(5, 23), PU5, 3 }, /* MLB_CLK */
> + { RCAR_GP_PIN(5, 22), PU5, 2 }, /* MSIOF0_RXD */
> + { RCAR_GP_PIN(5, 21), PU5, 1 }, /* MSIOF0_SS2 */
> + { RCAR_GP_PIN(5, 20), PU5, 0 }, /* MSIOF0_TXD */
> +
> + { RCAR_GP_PIN(6, 31), PU6, 6 }, /* USB31_OVC */
> + { RCAR_GP_PIN(6, 30), PU6, 5 }, /* USB31_PWEN */
> + { RCAR_GP_PIN(6, 29), PU6, 4 }, /* USB30_OVC */
> + { RCAR_GP_PIN(6, 28), PU6, 3 }, /* USB30_PWEN */
> + { RCAR_GP_PIN(6, 27), PU6, 2 }, /* USB1_OVC */
> + { RCAR_GP_PIN(6, 26), PU6, 1 }, /* USB1_PWEN */
> + { RCAR_GP_PIN(6, 25), PU6, 0 }, /* USB0_OVC */
> +};
> +
> +static int r8a7795_pin_to_bias_data(unsigned int pin, u32 *reg, u32 *bit)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < ARRAY_SIZE(pullups); i++) {
> + if (pullups[i].pin == pin) {
> + *reg = pullups[i].reg;
> + *bit = BIT(pullups[i].bit);
> + return 0;
> + }
> + }
> +
> + return -EINVAL;
> +}
>
> static unsigned int r8a7795_pinmux_get_bias(struct sh_pfc *pfc,
> unsigned int pin)
> @@ -5361,12 +5377,9 @@ static unsigned int r8a7795_pinmux_get_bias(struct
> sh_pfc *pfc, u32 reg;
> u32 bit;
>
> - if (WARN_ON_ONCE(!pullups[pin].reg))
> + if (WARN_ON_ONCE(r8a7795_pin_to_bias_data(pin, ®, &bit)))
> return PIN_CONFIG_BIAS_DISABLE;
>
> - reg = pullups[pin].reg;
> - bit = BIT(pullups[pin].bit);
> -
> if (sh_pfc_read_reg(pfc, PUEN + reg, 32) & bit) {
> if (sh_pfc_read_reg(pfc, PUD + reg, 32) & bit)
> return PIN_CONFIG_BIAS_PULL_UP;
Slightly out of scope, but the following code
if (sh_pfc_read_reg(pfc, PUEN + reg, 32) & bit) {
if (sh_pfc_read_reg(pfc, PUD + reg, 32) & bit)
return PIN_CONFIG_BIAS_PULL_UP;
else
return PIN_CONFIG_BIAS_PULL_DOWN;
} else
return PIN_CONFIG_BIAS_DISABLE;
misses braces around the else. It could be written
if (!(sh_pfc_read_reg(pfc, PUEN + reg, 32) & bit))
return PIN_CONFIG_BIAS_DISABLE;
else if (sh_pfc_read_reg(pfc, PUD + reg, 32) & bit)
return PIN_CONFIG_BIAS_PULL_UP;
else
return PIN_CONFIG_BIAS_PULL_DOWN;
> @@ -5383,12 +5396,9 @@ static void r8a7795_pinmux_set_bias(struct sh_pfc
> *pfc, unsigned int pin, u32 reg;
> u32 bit;
>
> - if (WARN_ON_ONCE(!pullups[pin].reg))
> + if (WARN_ON_ONCE(r8a7795_pin_to_bias_data(pin, ®, &bit)))
> return;
>
> - reg = pullups[pin].reg;
> - bit = BIT(pullups[pin].bit);
> -
> enable = sh_pfc_read_reg(pfc, PUEN + reg, 32) & ~bit;
> if (bias != PIN_CONFIG_BIAS_DISABLE)
> enable |= bit;
--
Regards,
Laurent Pinchart
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Re: [PATCH 2/2] pinctrl: sh-pfc: r8a7795: Use lookup function for bias data
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- Subject: Re: [PATCH 2/2] pinctrl: sh-pfc: r8a7795: Use lookup function for bias data
- From: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
- Date: Thu, 03 Nov 2016 19:10:06 +0200
- In-reply-to: <20161103153421.15527-3-niklas.soderlund+renesas@ragnatech.se>
- References: <20161103153421.15527-1-niklas.soderlund+renesas@ragnatech.se> <20161103153421.15527-3-niklas.soderlund+renesas@ragnatech.se>
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