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Diffstat (limited to 'src/mainboard/google/snow')
-rw-r--r--src/mainboard/google/snow/romstage.c54
1 files changed, 49 insertions, 5 deletions
diff --git a/src/mainboard/google/snow/romstage.c b/src/mainboard/google/snow/romstage.c
index 39069b2d95..ca7ba9c23b 100644
--- a/src/mainboard/google/snow/romstage.c
+++ b/src/mainboard/google/snow/romstage.c
@@ -35,6 +35,9 @@
#include <console/console.h>
#include <arch/stages.h>
+#include <drivers/maxim/max77686/max77686.h>
+#include <device/i2c.h>
+
#include "mainboard.h"
#define MMC0_GPIO_PIN (58)
@@ -52,6 +55,45 @@ static int board_wakeup_permitted(void)
}
#endif
+static int setup_pmic(void)
+{
+ int error = 0;
+
+ /*
+ * We're using CR1616 coin cell battery that is non-rechargeable
+ * battery. But, BBCHOSTEN bit of the BBAT Charger Register in
+ * MAX77686 is enabled by default for charging coin cell.
+ *
+ * Also, we cannot meet the coin cell reverse current spec. in UL
+ * standard if BBCHOSTEN bit is enabled.
+ *
+ * Disable Coin BATT Charging
+ */
+ error = max77686_disable_backup_batt();
+
+ error |= max77686_volsetting(PMIC_BUCK2, CONFIG_VDD_ARM_MV,
+ REG_ENABLE, MAX77686_MV);
+ error |= max77686_volsetting(PMIC_BUCK3, CONFIG_VDD_INT_UV,
+ REG_ENABLE, MAX77686_UV);
+ error |= max77686_volsetting(PMIC_BUCK1, CONFIG_VDD_MIF_MV,
+ REG_ENABLE, MAX77686_MV);
+ error |= max77686_volsetting(PMIC_BUCK4, CONFIG_VDD_G3D_MV,
+ REG_ENABLE, MAX77686_MV);
+ error |= max77686_volsetting(PMIC_LDO2, CONFIG_VDD_LDO2_MV,
+ REG_ENABLE, MAX77686_MV);
+ error |= max77686_volsetting(PMIC_LDO3, CONFIG_VDD_LDO3_MV,
+ REG_ENABLE, MAX77686_MV);
+ error |= max77686_volsetting(PMIC_LDO5, CONFIG_VDD_LDO5_MV,
+ REG_ENABLE, MAX77686_MV);
+ error |= max77686_volsetting(PMIC_LDO10, CONFIG_VDD_LDO10_MV,
+ REG_ENABLE, MAX77686_MV);
+
+ if (error)
+ printk(BIOS_CRIT, "%s: Error during PMIC setup\n", __func__);
+
+ return error;
+}
+
static void initialize_s5p_mshc(void)
{
/* MMC0: Fixed, 8 bit mode, connected with GPIO. */
@@ -90,11 +132,13 @@ void main(void)
system_clock_init(mem, arm_ratios);
console_init();
- /*
- * FIXME: Do necessary I2C init so low-level PMIC code doesn't need to.
- * Also, we should only call power_init() on cold boot.
- */
- power_init();
+
+ i2c_set_early_reg(0x12c60000);
+ i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+ if (power_init())
+ power_shutdown();
+ if (setup_pmic())
+ power_shutdown();
if (!mem) {
printk(BIOS_CRIT, "Unable to auto-detect memory timings\n");