imx8mm: evk: enable bd71837 pmic

Enable bd71837 pmic for i.MX8MM EVK board, need to set voltage for
DRAM and linux suspend voltage requirement.

Signed-off-by: Peng Fan <peng.fan@nxp.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/board/freescale/imx8mm_evk/spl.c b/board/freescale/imx8mm_evk/spl.c
index 2a5fb27a73..2d08f9a563 100644
--- a/board/freescale/imx8mm_evk/spl.c
+++ b/board/freescale/imx8mm_evk/spl.c
@@ -18,6 +18,9 @@
 #include <dm/uclass-internal.h>
 #include <dm/device-internal.h>
 
+#include <power/pmic.h>
+#include <power/bd71837.h>
+
 DECLARE_GLOBAL_DATA_PTR;
 
 int spl_board_boot_device(enum boot_device boot_dev_spl)
@@ -79,6 +82,42 @@ int board_early_init_f(void)
 	return 0;
 }
 
+int power_init_board(void)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = pmic_get("pmic@4b", &dev);
+	if (ret == -ENODEV) {
+		puts("No pmic\n");
+		return 0;
+	}
+	if (ret != 0)
+		return ret;
+
+	/* decrease RESET key long push time from the default 10s to 10ms */
+	pmic_reg_write(dev, BD718XX_PWRONCONFIG1, 0x0);
+
+	/* unlock the PMIC regs */
+	pmic_reg_write(dev, BD718XX_REGLOCK, 0x1);
+
+	/* increase VDD_SOC to typical value 0.85v before first DRAM access */
+	pmic_reg_write(dev, BD718XX_BUCK1_VOLT_RUN, 0x0f);
+
+	/* increase VDD_DRAM to 0.975v for 3Ghz DDR */
+	pmic_reg_write(dev, BD718XX_1ST_NODVS_BUCK_VOLT, 0x83);
+
+#ifndef CONFIG_IMX8M_LPDDR4
+	/* increase NVCC_DRAM_1V2 to 1.2v for DDR4 */
+	pmic_reg_write(dev, BD718XX_4TH_NODVS_BUCK_VOLT, 0x28);
+#endif
+
+	/* lock the PMIC regs */
+	pmic_reg_write(dev, BD718XX_REGLOCK, 0x11);
+
+	return 0;
+}
+
 void board_init_f(ulong dummy)
 {
 	struct udevice *dev;
@@ -113,6 +152,8 @@ void board_init_f(ulong dummy)
 
 	enable_tzc380();
 
+	power_init_board();
+
 	/* DDR initialization */
 	spl_dram_init();