x86: edison: Enable SD slot

Enable SD slot on Intel Edison platform.

By default firmware doesn't put device on active state. Thus,
we have to do this explicitly.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/arch/x86/dts/edison.dts b/arch/x86/dts/edison.dts
index c048765..df24aa0 100644 (file)
--- a/arch/x86/dts/edison.dts
+++ b/arch/x86/dts/edison.dts
@@ -84,15 +84,10 @@
                reg = <0xff3fc000 0x1000>;
        };
 
-/*
- * FIXME: For now U-Boot DM model doesn't allow to power up this controller.
- * Enabling it will make U-Boot hang.
- *
        sdcard: mmc@ff3fa000 {
                compatible = "intel,sdhci-tangier";
                reg = <0xff3fa000 0x1000>;
        };
- */
 
        pmu: power@ff00b000 {
                compatible = "intel,pmu-mid";

diff --git a/board/intel/edison/edison.c b/board/intel/edison/edison.c
index 5faf3c5..d80ee3a 100644 (file)
--- a/board/intel/edison/edison.c
+++ b/board/intel/edison/edison.c
@@ -13,9 +13,19 @@
 #include <linux/usb/gadget.h>
 
 #include <asm/cache.h>
+#include <asm/pmu.h>
 #include <asm/scu.h>
 #include <asm/u-boot-x86.h>
 
+/* List of Intel Tangier LSSs */
+#define PMU_LSS_TANGIER_SDIO0_01       1
+
+int board_early_init_r(void)
+{
+       pmu_turn_power(PMU_LSS_TANGIER_SDIO0_01, true);
+       return 0;
+}
+
 static struct dwc3_device dwc3_device_data = {
        .maximum_speed = USB_SPEED_HIGH,
        .base = CONFIG_SYS_USB_OTG_BASE,

diff --git a/configs/edison_defconfig b/configs/edison_defconfig
index 4687544..cac6e42 100644 (file)
--- a/configs/edison_defconfig
+++ b/configs/edison_defconfig
@@ -4,6 +4,7 @@ CONFIG_NR_DRAM_BANKS=3
 CONFIG_VENDOR_INTEL=y
 CONFIG_TARGET_EDISON=y
 CONFIG_SMP=y
+CONFIG_BOARD_EARLY_INIT_R=y
 CONFIG_LAST_STAGE_INIT=y
 CONFIG_HUSH_PARSER=y
 # CONFIG_CMDLINE_EDITING is not set