[PATCH] arm: baltos: enable mPCIe slot and configure external GPIO controller

[yegorslists at googlemail.com]

From: Yegor Yefremov <yegorslists at googlemail.com>

Baltos devices provide a mPCIe slot, whose power is turned off by
default. This patch activates mPCIe slot in barebox, so that for example
GSM modem can be already available in user space.

Also configure external GPIO controller via setting its output pins to
low.

Signed-off-by: Yegor Yefremov <yegorslists at googlemail.com>
---
 arch/arm/boards/vscom-baltos/board.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/boards/vscom-baltos/board.c b/arch/arm/boards/vscom-baltos/board.c
index fea992d..39f40a6 100644
--- a/arch/arm/boards/vscom-baltos/board.c
+++ b/arch/arm/boards/vscom-baltos/board.c
@@ -41,6 +41,7 @@
 #include <linux/err.h>
 #include <mach/bbu.h>
 #include <libfile.h>
+#include <gpio.h>
 
 static struct omap_barebox_part baltos_barebox_part = {
 	.nand_offset = SZ_512K,
@@ -109,6 +110,17 @@ static int baltos_read_eeprom(void)
 	sprintf(var_buf, "%d", hw_param.SystemId);
 	globalvar_add_simple("board.id", var_buf);
 
+	/* enable mPCIe slot */
+	gpio_direction_output(100, 1);
+
+	/* configure output signals of the external GPIO controller */
+	if (hw_param.SystemId == 210 || hw_param.SystemId == 211) {
+		gpio_direction_output(132, 0);
+		gpio_direction_output(133, 0);
+		gpio_direction_output(134, 0);
+		gpio_direction_output(135, 0);
+	}
+
 	return 0;
 }
 environment_initcall(baltos_read_eeprom);
-- 
2.1.4