sunxi: support for a second SD card socket

Hello,

this patchset enables the full-size SD card socket on the A20-Olimex-SOM-EVB baseboard in u-boot and adds support for including this kind of secondary socket into the boot environment provided by config_distro_bootcmd.h on sunxi-based systems.

The latter is particularly useful on the A20-Olimex-SOM-EVB as changing the card in the primary micro-SD socket is kind of fiddly when the SOM is plugged into the baseboard.

Changes since V1:
I had botched the patch generation for V1 so that the posted patch was incomplete. This is now the complete patch.

Regards,
Karsten

Karsten Merker (2):
sunxi: A20-Olimex-SOM-EVB defconfig: enable mmc3
sunxi: Enable a second mmc socket as boot target in the environment

 configs/A20-Olimex-SOM-EVB_defconfig | 3 +++
 include/configs/sunxi-common.h       | 7 +++++++
 2 files changed, 10 insertions(+)

2.1.4

The Olimex A20-SOM-EVB is an evaluation board for the Olimex A20-SOM system-on-module. The baseboard provides a full-size SD socket (connected to mmc3) in addition to the micro-SD socket on the SOM itself (which is connected to mmc0).

Enable the mmc3 controller in the board defconfig.

---
 configs/A20-Olimex-SOM-EVB_defconfig | 3 +++
 1 file changed, 3 insertions(+)

index 5166c06..34b3f36 100644
@@ -3,6 +3,9 @@ CONFIG_ARCH_SUNXI=y
 CONFIG_MACH_SUN7I=y
 CONFIG_DRAM_CLK=480
 CONFIG_MMC0_CD_PIN="PH1"
+CONFIG_MMC3_CD_PIN="PH0"
+CONFIG_MMC3_PINS="PH"
+CONFIG_MMC_SUNXI_SLOT_EXTRA=3
 CONFIG_USB0_VBUS_PIN="PB9"
 CONFIG_USB0_VBUS_DET="PH5"
 CONFIG_DEFAULT_DEVICE_TREE="sun7i-a20-olimex-som-evb"

2.1.4

Some sunxi-based boards (such as the Olimex A20-SOM-EVB) have a second MMC socket. This socket is not bootable hardware-wise, i.e. u-boot itself cannot be loaded from it, but once u-boot has started, the second socket can be used in the boot process provided by config_distro_bootcmd.h.

If a second MMC socket is present, place it in the boot order after the first MMC socket.

---
 include/configs/sunxi-common.h | 7 +++++++
 1 file changed, 7 insertions(+)

index 98a2c74..33f765c 100644
@@ -418,8 +418,14 @@ extern int soft_i2c_gpio_scl;
 
 #ifdef CONFIG_MMC
 #define BOOT_TARGET_DEVICES_MMC(func) func(MMC, mmc, 0)
+#if CONFIG_MMC_SUNXI_SLOT_EXTRA != -1
+#define BOOT_TARGET_DEVICES_MMC_EXTRA(func) func(MMC, mmc, 1)
+#else
+#define BOOT_TARGET_DEVICES_MMC_EXTRA(func)
+#endif
 #else
 #define BOOT_TARGET_DEVICES_MMC(func)
+#define BOOT_TARGET_DEVICES_MMC_EXTRA(func)
 #endif
 
 #ifdef CONFIG_AHCI

@@ -447,6 +453,7 @@ extern int soft_i2c_gpio_scl;
 #define BOOT_TARGET_DEVICES(func) \
 	func(FEL, fel, na) \
 	BOOT_TARGET_DEVICES_MMC(func) \
+	BOOT_TARGET_DEVICES_MMC_EXTRA(func) \
 	BOOT_TARGET_DEVICES_SCSI(func) \
 	BOOT_TARGET_DEVICES_USB(func) \
 	func(PXE, pxe, na) \

2.1.4

Hi,

Thanks, both patches look good to me. I've added them to my sunxi-wip tree (for now) and I will include them in the next sunxi pull-req.

Regards,

Hans