ARM: imx6: configure ddrcode pins in spl DHCOM i.MX6 PDK

Preperation for conditional DDR3 initialization based on GPIO codes.

Signed-off-by: Ludwig Zenz <lzenz@dh-electronics.de>

diff --git a/board/dhelectronics/dh_imx6/dh_imx6_spl.c b/board/dhelectronics/dh_imx6/dh_imx6_spl.c
index beda38955ef44288bb6d2fad2240c0edaa42f304..eafb86d84fd2d4df230ffa3e061728ba97624ed2 100644 (file)
--- a/board/dhelectronics/dh_imx6/dh_imx6_spl.c
+++ b/board/dhelectronics/dh_imx6/dh_imx6_spl.c
@@ -208,6 +208,45 @@ static void setup_iomux_boardid(void)
        SETUP_IOMUX_PADS(hwcode_pads);
 }
 
+/* DDR Code */
+static iomux_v3_cfg_t const ddrcode_pads[] = {
+       IOMUX_PADS(PAD_EIM_A16__GPIO2_IO22      | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
+       IOMUX_PADS(PAD_EIM_A17__GPIO2_IO21      | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
+};
+
+static void setup_iomux_ddrcode(void)
+{
+       /* ddr code pins */
+       SETUP_IOMUX_PADS(ddrcode_pads);
+}
+
+enum dhcom_ddr3_code {
+       DH_DDR3_SIZE_256MIB = 0x00,
+       DH_DDR3_SIZE_512MIB = 0x01,
+       DH_DDR3_SIZE_1GIB   = 0x02,
+       DH_DDR3_SIZE_2GIB   = 0x03
+};
+
+#define DDR3_CODE_BIT_0   IMX_GPIO_NR(2, 22)
+#define DDR3_CODE_BIT_1   IMX_GPIO_NR(2, 21)
+
+enum dhcom_ddr3_code dhcom_get_ddr3_code(void)
+{
+       enum dhcom_ddr3_code ddr3_code;
+
+       gpio_request(DDR3_CODE_BIT_0, "DDR3_CODE_BIT_0");
+       gpio_request(DDR3_CODE_BIT_1, "DDR3_CODE_BIT_1");
+
+       gpio_direction_input(DDR3_CODE_BIT_0);
+       gpio_direction_input(DDR3_CODE_BIT_1);
+
+       /* 256MB = 0b00; 512MB = 0b01; 1GB = 0b10; 2GB = 0b11 */
+       ddr3_code = (!!gpio_get_value(DDR3_CODE_BIT_1) << 1)
+            | (!!gpio_get_value(DDR3_CODE_BIT_0));
+
+       return ddr3_code;
+}
+
 /* GPIO */
 static iomux_v3_cfg_t const gpio_pads[] = {
        IOMUX_PADS(PAD_GPIO_2__GPIO1_IO02       | MUX_PAD_CTRL(GPIO_PAD_CTRL)),
@@ -365,6 +404,7 @@ void board_init_f(ulong dummy)
        timer_init();
 
        setup_iomux_boardid();
+       setup_iomux_ddrcode();
        setup_iomux_gpio();
        setup_iomux_enet();
        setup_iomux_sd();