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authorPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>2017-09-19 15:49:14 +0200
committerPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>2017-10-01 00:33:33 +0200
commitfd0a1ba52ec65e82caf163d0074e768c3abc57ae (patch)
tree12760a9dec363cdd6cb47f1c893be6a863b1e737 /drivers
parent6696fe5a2fac33fa9c1ed65d7f1b1af095129da9 (diff)
rockchip: pinctrl: rk3368: add pinctrl for SDMMC0
Apparently, our earlier assumption that the BROM will always set up the iomux for SDcard communication does not always hold true: when booting U-Boot from the on-module (on the RK3368-uQ7) eMMC, the SDcard pins are not set up and need to be configured by the pinctrl driver to allow SD card access. This change implements support for setting up the SDMMC pins in pinctrl for the RK3368. Reported-by: Klaus Goger <klaus.goger@theobroma-systems.com> Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pinctrl/rockchip/pinctrl_rk3368.c39
1 files changed, 34 insertions, 5 deletions
diff --git a/drivers/pinctrl/rockchip/pinctrl_rk3368.c b/drivers/pinctrl/rockchip/pinctrl_rk3368.c
index b1f5704164..25249e377a 100644
--- a/drivers/pinctrl/rockchip/pinctrl_rk3368.c
+++ b/drivers/pinctrl/rockchip/pinctrl_rk3368.c
@@ -208,6 +208,29 @@ enum {
GPIO2A0_FLASH_CSN0 = (1 << GPIO2A0_SHIFT),
};
+/*GRF_GPIO2B_IOMUX*/
+enum {
+ GPIO2B3_SHIFT = 6,
+ GPIO2B3_MASK = GENMASK(GPIO2B3_SHIFT + 1, GPIO2B3_SHIFT),
+ GPIO2B3_GPIO = 0,
+ GPIO2B3_SDMMC0_DTECTN = (1 << GPIO2B3_SHIFT),
+
+ GPIO2B2_SHIFT = 4,
+ GPIO2B2_MASK = GENMASK(GPIO2B2_SHIFT + 1, GPIO2B2_SHIFT),
+ GPIO2B2_GPIO = 0,
+ GPIO2B2_SDMMC0_CMD = (1 << GPIO2B2_SHIFT),
+
+ GPIO2B1_SHIFT = 2,
+ GPIO2B1_MASK = GENMASK(GPIO2B1_SHIFT + 1, GPIO2B1_SHIFT),
+ GPIO2B1_GPIO = 0,
+ GPIO2B1_SDMMC0_CLKOUT = (1 << GPIO2B1_SHIFT),
+
+ GPIO2B0_SHIFT = 0,
+ GPIO2B0_MASK = GENMASK(GPIO2B0_SHIFT + 1, GPIO2B0_SHIFT),
+ GPIO2B0_GPIO = 0,
+ GPIO2B0_SDMMC0_D3 = (1 << GPIO2B0_SHIFT),
+};
+
/*GRF_GPIO2D_IOMUX*/
enum {
GPIO2D7_SHIFT = 14,
@@ -580,11 +603,17 @@ static void pinctrl_rk3368_sdmmc_config(struct rk3368_grf *grf, int mmc_id)
GPIO2A4_EMMC_CLKOUT);
break;
case PERIPH_ID_SDCARD:
- /*
- * We assume that the BROM has already set this up
- * correctly for us and that there's nothing to do
- * here.
- */
+ debug("mmc id = %d setting registers!\n", mmc_id);
+ rk_clrsetreg(&grf->gpio2a_iomux,
+ GPIO2A5_MASK | GPIO2A7_MASK |
+ GPIO2A7_MASK,
+ GPIO2A5_SDMMC0_D0 | GPIO2A6_SDMMC0_D1 |
+ GPIO2A7_SDMMC0_D2);
+ rk_clrsetreg(&grf->gpio2b_iomux,
+ GPIO2B0_MASK | GPIO2B1_MASK |
+ GPIO2B2_MASK | GPIO2B3_MASK,
+ GPIO2B0_SDMMC0_D3 | GPIO2B1_SDMMC0_CLKOUT |
+ GPIO2B2_SDMMC0_CMD | GPIO2B3_SDMMC0_DTECTN);
break;
default:
debug("mmc id = %d iomux error!\n", mmc_id);