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>
diff --git a/board/freescale/imx8mm_evk/spl.c b/board/freescale/imx8mm_evk/spl.c
index 2a5fb27..2d08f9a 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 @@
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 @@
enable_tzc380();
+ power_init_board();
+
/* DDR initialization */
spl_dram_init();