[PATCH v1 2/2] apalis-imx6: use dynamic DDR calibration

[Francesco Dolcini]

Enable dynamic DDR calibration to have a reliable behavior on edge
temperatures conditions.

Signed-off-by: Max Krummenacher <max.krummenacher at toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini at toradex.com>

---

 board/toradex/apalis_imx6/apalis_imx6.c | 19 +++++++++++++++++++
 configs/apalis_imx6_defconfig           |  1 +
 2 files changed, 20 insertions(+)

diff --git a/board/toradex/apalis_imx6/apalis_imx6.c b/board/toradex/apalis_imx6/apalis_imx6.c
index 74060daadd..ce64ace0d4 100644
--- a/board/toradex/apalis_imx6/apalis_imx6.c
+++ b/board/toradex/apalis_imx6/apalis_imx6.c
@@ -1077,6 +1077,24 @@ static void ddr_init(int *table, int size)
 		writel(table[2 * i + 1], table[2 * i]);
 }
 
+/* Perform DDR DRAM calibration */
+static void spl_dram_perform_cal(void)
+{
+#ifdef CONFIG_MX6_DDRCAL
+	int err;
+	struct mx6_ddr_sysinfo ddr_sysinfo = {
+		.dsize = 2,
+	};
+
+	err = mmdc_do_write_level_calibration(&ddr_sysinfo);
+	if (err)
+		printf("error %d from write level calibration\n", err);
+	err = mmdc_do_dqs_calibration(&ddr_sysinfo);
+	if (err)
+		printf("error %d from dqs calibration\n", err);
+#endif
+}
+
 static void spl_dram_init(void)
 {
 	int minc, maxc;
@@ -1095,6 +1113,7 @@ static void spl_dram_init(void)
 		break;
 	};
 	udelay(100);
+	spl_dram_perform_cal();
 }
 
 void board_init_f(ulong dummy)
diff --git a/configs/apalis_imx6_defconfig b/configs/apalis_imx6_defconfig
index a0e85ba23a..0e06e75818 100644
--- a/configs/apalis_imx6_defconfig
+++ b/configs/apalis_imx6_defconfig
@@ -10,6 +10,7 @@ CONFIG_SYS_MEMTEST_END=0x10010000
 CONFIG_ENV_SIZE=0x2000
 CONFIG_ENV_OFFSET=0xFFFFDE00
 CONFIG_MX6Q=y
+CONFIG_MX6_DDRCAL=y
 CONFIG_TARGET_APALIS_IMX6=y
 CONFIG_DM_GPIO=y
 CONFIG_DEFAULT_DEVICE_TREE="imx6-apalis"
-- 
2.25.1