mach-ux500: basic HREFv60 support v2

The HREFv60 variant of the MOP500 family of boards remove the
external GPIO expander and route these pins back to some of the
readily available internal GPIO pins instead.

Based on a patch by Bibek Basu <bibek.basu@stericsson.com> for
an internal kernel version.

Cc: Bibek Basu <bibek.basu@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 33 insertions, 9 deletions

diff --git a/arch/arm/mach-ux500/board-mop500-sdi.c b/arch/arm/mach-ux500/board-mop500-sdi.c
index 68c8375e45c6..bf0b02414e5b 100644
--- a/arch/arm/mach-ux500/board-mop500-sdi.c
+++ b/arch/arm/mach-ux500/board-mop500-sdi.c
@@ -12,6 +12,7 @@
 #include <linux/mmc/host.h>
 #include <linux/platform_device.h>
 
+#include <asm/mach-types.h>
 #include <plat/ste_dma40.h>
 #include <mach/devices.h>
 #include <mach/hardware.h>
@@ -68,7 +69,6 @@ static struct mmci_platform_data mop500_sdi0_data = {
         .ocr_mask       = MMC_VDD_29_30,
         .f_max          = 100000000,
         .capabilities   = MMC_CAP_4_BIT_DATA,
-        .gpio_cd        = GPIO_SDMMC_CD,
         .gpio_wp        = -1,
 #ifdef CONFIG_STE_DMA40
         .dma_filter     = stedma40_filter,
@@ -77,23 +77,40 @@ static struct mmci_platform_data mop500_sdi0_data = {
 #endif
 };
 
-void mop500_sdi_tc35892_init(void)
+/* GPIO pins used by the sdi0 level shifter */
+static int sdi0_en = -1;
+static int sdi0_vsel = -1;
+
+static void sdi0_configure(void)
 {
         int ret;
 
-        ret = gpio_request(GPIO_SDMMC_EN, "SDMMC_EN");
+        ret = gpio_request(sdi0_en, "level shifter enable");
         if (!ret)
-                ret = gpio_request(GPIO_SDMMC_1V8_3V_SEL,
-                                   "GPIO_SDMMC_1V8_3V_SEL");
-        if (ret)
+                ret = gpio_request(sdi0_vsel,
+                                   "level shifter 1v8-3v select");
+
+        if (ret) {
+                pr_warning("unable to config sdi0 gpios for level shifter.\n");
                 return;
+        }
 
-        gpio_direction_output(GPIO_SDMMC_1V8_3V_SEL, 0);
-        gpio_direction_output(GPIO_SDMMC_EN, 1);
+        /* Select the default 2.9V and enable level shifter */
+        gpio_direction_output(sdi0_vsel, 0);
+        gpio_direction_output(sdi0_en, 1);
 
+        /* Add the device */
         db8500_add_sdi0(&mop500_sdi0_data);
 }
 
+void mop500_sdi_tc35892_init(void)
+{
+        mop500_sdi0_data.gpio_cd = GPIO_SDMMC_CD;
+        sdi0_en = GPIO_SDMMC_EN;
+        sdi0_vsel = GPIO_SDMMC_1V8_3V_SEL;
+        sdi0_configure();
+}
+
 /*
  * SDI 2 (POP eMMC, not on DB8500ed)
  */
@@ -179,8 +196,15 @@ void __init mop500_sdi_init(void)
         /* On-board eMMC */
         db8500_add_sdi4(&mop500_sdi4_data);
 
+        if (machine_is_hrefv60()) {
+                mop500_sdi0_data.gpio_cd = HREFV60_SDMMC_CD_GPIO;
+                sdi0_en = HREFV60_SDMMC_EN_GPIO;
+                sdi0_vsel = HREFV60_SDMMC_1V8_3V_GPIO;
+                sdi0_configure();
+        }
         /*
-         * sdi0 will finally be added when the TC35892 initializes and calls
+         * On boards with the TC35892 GPIO expander, sdi0 will finally
+         * be added when the TC35892 initializes and calls
          * mop500_sdi_tc35892_init() above.
          */
 }