ARM: OMAP2+: Fix eMMC on n900 with device tree

Looks like we need to configure the regulators and use the pdata
quirk to make eMMC work with device tree.

It seems that mostly vaux3 is used, and only some earlier revisions
used vmmc2. This has been tested to work on devices where the
system_rev passed by the bootloader has versions 0x0010, 0x2101
and 0x2204.

Cc: devicetree@vger.kernel.org
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Sebastian Reichel <sre@debian.org>
[tony@atomide.com: updated with pinctrl changes and comments from Sebastian]
Signed-off-by: Tony Lindgren <tony@atomide.com>

2 files changed, 23 insertions, 1 deletions

diff --git a/arch/arm/boot/dts/omap3-n900.dts b/arch/arm/boot/dts/omap3-n900.dts
index c4f20bfe4cce..c2c306d13b87 100644
--- a/arch/arm/boot/dts/omap3-n900.dts
+++ b/arch/arm/boot/dts/omap3-n900.dts
@@ -125,6 +125,21 @@
                 >;
         };
 
+        mmc2_pins: pinmux_mmc2_pins {
+                pinctrl-single,pins = <
+                        0x128 (PIN_INPUT_PULLUP | MUX_MODE0)    /* sdmmc2_clk */
+                        0x12a (PIN_INPUT_PULLUP | MUX_MODE0)    /* sdmmc2_cmd */
+                        0x12c (PIN_INPUT_PULLUP | MUX_MODE0)    /* sdmmc2_dat0 */
+                        0x12e (PIN_INPUT_PULLUP | MUX_MODE0)    /* sdmmc2_dat1 */
+                        0x130 (PIN_INPUT_PULLUP | MUX_MODE0)    /* sdmmc2_dat2 */
+                        0x132 (PIN_INPUT_PULLUP | MUX_MODE0)    /* sdmmc2_dat3 */
+                        0x134 (PIN_INPUT_PULLUP | MUX_MODE0)    /* sdmmc2_dat4 */
+                        0x136 (PIN_INPUT_PULLUP | MUX_MODE0)    /* sdmmc2_dat5 */
+                        0x138 (PIN_INPUT_PULLUP | MUX_MODE0)    /* sdmmc2_dat6 */
+                        0x13a (PIN_INPUT_PULLUP | MUX_MODE0)    /* sdmmc2_dat7 */
+                >;
+        };
+
         display_pins: pinmux_display_pins {
                 pinctrl-single,pins = <
                         0x0d4 (PIN_OUTPUT | MUX_MODE4)          /* RX51_LCD_RESET_GPIO */
@@ -358,8 +373,14 @@
         cd-gpios = <&gpio6 0 GPIO_ACTIVE_HIGH>; /* 160 */
 };
 
+/* most boards use vaux3, only some old versions use vmmc2 instead */
 &mmc2 {
-        status = "disabled";
+        pinctrl-names = "default";
+        pinctrl-0 = <&mmc2_pins>;
+        vmmc-supply = <&vaux3>;
+        vmmc_aux-supply = <&vsim>;
+        bus-width = <8>;
+        non-removable;
 };
 
 &mmc3 {
diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c
index 10c71450cf63..39f020c982e8 100644
--- a/arch/arm/mach-omap2/pdata-quirks.c
+++ b/arch/arm/mach-omap2/pdata-quirks.c
@@ -139,6 +139,7 @@ struct of_dev_auxdata omap_auxdata_lookup[] __initdata = {
 
 static struct pdata_init pdata_quirks[] __initdata = {
 #ifdef CONFIG_ARCH_OMAP3
+        { "nokia,omap3-n900", hsmmc2_internal_input_clk, },
         { "nokia,omap3-n9", hsmmc2_internal_input_clk, },
         { "nokia,omap3-n950", hsmmc2_internal_input_clk, },
         { "isee,omap3-igep0020", omap3_igep0020_legacy_init, },