[PATCH] pico-imx7d: Add support for the 2GB variant

[Fabio Estevam]

Add the board detection mechanism to be able to support
the 2GB variant.

Based on the code from TechNexion U-Boot downstream tree.

Signed-off-by: Fabio Estevam <festevam at denx.de>
---
 board/technexion/pico-imx7d/spl.c | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/board/technexion/pico-imx7d/spl.c b/board/technexion/pico-imx7d/spl.c
index df5f058577..f86fee9c88 100644
--- a/board/technexion/pico-imx7d/spl.c
+++ b/board/technexion/pico-imx7d/spl.c
@@ -61,6 +61,8 @@ static struct ddrc ddrc_regs_val = {
 	.dramtmg0	= 0x09081109,
 	.addrmap0	= 0x0000001f,
 	.addrmap1	= 0x00080808,
+	.addrmap2	= 0x00000000,
+	.addrmap3	= 0x00000000,
 	.addrmap4	= 0x00000f0f,
 	.addrmap5	= 0x07070707,
 	.addrmap6	= 0x0f0f0707,
@@ -100,16 +102,38 @@ static void gpr_init(void)
 	writel(0x4F400005, &gpr_regs->gpr[1]);
 }
 
-static bool is_1g(void)
+/*
+ * Revision Detection
+ *
+ *   GPIO1_12           GPIO1_13
+ *     0                0           1GB DDR3
+ *     0                1           2GB DDR3
+ *     1                0           512MB DDR3
+ */
+
+static int imx7d_pico_detect_board(void)
 {
 	gpio_direction_input(IMX_GPIO_NR(1, 12));
-	return !gpio_get_value(IMX_GPIO_NR(1, 12));
+	gpio_direction_input(IMX_GPIO_NR(1, 13));
+
+	return gpio_get_value(IMX_GPIO_NR(1, 12)) << 1 |
+	       gpio_get_value(IMX_GPIO_NR(1, 13));
 }
 
 static void ddr_init(void)
 {
-	if (is_1g())
+	switch (imx7d_pico_detect_board()) {
+	case 0:
 		ddrc_regs_val.addrmap6	= 0x0f070707;
+		break;
+	case 1:
+		ddrc_regs_val.addrmap0	= 0x0000001f;
+		ddrc_regs_val.addrmap1	= 0x00181818;
+		ddrc_regs_val.addrmap4	= 0x00000f0f;
+		ddrc_regs_val.addrmap5	= 0x04040404;
+		ddrc_regs_val.addrmap6	= 0x04040404;
+		break;
+	}
 
 	mx7_dram_cfg(&ddrc_regs_val, &ddrc_mp_val, &ddr_phy_regs_val,
 		     &calib_param);
-- 
2.25.1