If runs at 1.2GHz, enable ldo, and adjust voltage.
If ldo_bypass is true, it will adjust voltage. If not, do nothing.
This function is board specific, so implement it in board file.
Signed-off-by: Peng Fan <peng....@freescale.com>
Signed-off-by: Robin Gong <b38...@freescale.com>
Signed-off-by: Nitin Garg <nitin.g...@freescale.com>
---
board/freescale/mx6sabresd/mx6sabresd.c | 85 +++++++++++++++++++++++++++++++++
include/configs/mx6sabresd.h | 2 +
2 files changed, 87 insertions(+)
diff --git a/board/freescale/mx6sabresd/mx6sabresd.c
b/board/freescale/mx6sabresd/mx6sabresd.c
index 59544d9..9e0a8ae 100644
--- a/board/freescale/mx6sabresd/mx6sabresd.c
+++ b/board/freescale/mx6sabresd/mx6sabresd.c
@@ -628,6 +628,7 @@ int board_init(void)
return 0;
}
+static struct pmic *pfuze;
int power_init_board(void)
{
struct pmic *p;
@@ -636,6 +637,7 @@ int power_init_board(void)
p = pfuze_common_init(I2C_PMIC);
if (!p)
return -ENODEV;
+ pfuze = p;
ret = pfuze_mode_init(p, APS_PFM);
if (ret < 0)
@@ -656,6 +658,89 @@ int power_init_board(void)
return 0;
}
+#ifdef CONFIG_LDO_BYPASS_CHECK
+void ldo_mode_set(int ldo_bypass)
+{
+ unsigned int value;
+ int is_400M;
+ unsigned char vddarm;
+ struct pmic *p = pfuze;
+
+ /* increase VDDARM/VDDSOC to support 1.2G chip */
+ if (check_1_2G()) {
+ ldo_bypass = 0; /* ldo_enable on 1.2G chip */
+ printf("1.2G chip, increase VDDARM_IN/VDDSOC_IN\n");
+ /* increase VDDARM to 1.425V */
+ pmic_reg_read(p, PFUZE100_SW1ABVOL, &value);
+ value &= ~0x3f;
+ value |= PFUZE100_SW1ABC_SETP(14250);
+ pmic_reg_write(p, PFUZE100_SW1ABVOL, value);
+
+ /* increase VDDSOC to 1.425V */
+ pmic_reg_read(p, PFUZE100_SW1CVOL, &value);
+ value &= ~0x3f;
+ value |= PFUZE100_SW1ABC_SETP(14250);
+ pmic_reg_write(p, PFUZE100_SW1CVOL, value);
+ }
+ /* switch to ldo_bypass mode , boot on 800Mhz */
+ if (ldo_bypass) {
+ prep_anatop_bypass();
+
+ /* decrease VDDARM for 400Mhz DQ:1.1V, DL:1.275V */
+ pmic_reg_read(p, PFUZE100_SW1ABVOL, &value);
+ value &= ~0x3f;
+#if defined(CONFIG_MX6DL)
+ value |= PFUZE100_SW1ABC_SETP(12750);
+#else
+ value |= PFUZE100_SW1ABC_SETP(11000);
+#endif
+ pmic_reg_write(p, PFUZE100_SW1ABVOL, value);
+
+ /* increase VDDSOC to 1.3V */
+ pmic_reg_read(p, PFUZE100_SW1CVOL, &value);
+ value &= ~0x3f;
+ value |= PFUZE100_SW1ABC_SETP(13000);
+ pmic_reg_write(p, PFUZE100_SW1CVOL, value);
+
+ /*
+ * MX6Q:
+ * VDDARM:1.15V@800M; VDDSOC:1.175V@800M
+ * VDDARM:0.975V@400M; VDDSOC:1.175V@400M
+ * MX6DL:
+ * VDDARM:1.175V@800M; VDDSOC:1.175V@800M
+ * VDDARM:1.075V@400M; VDDSOC:1.175V@400M
+ */
+ is_400M = set_anatop_bypass(2);
+ if (is_400M)
+#if defined(CONFIG_MX6DL)
+ vddarm = PFUZE100_SW1ABC_SETP(10750);
+#else
+ vddarm = PFUZE100_SW1ABC_SETP(9750);
+#endif
+ else
+#if defined(CONFIG_MX6DL)
+ vddarm = PFUZE100_SW1ABC_SETP(11750);
+#else
+ vddarm = PFUZE100_SW1ABC_SETP(11500);
+#endif
+
+ pmic_reg_read(p, PFUZE100_SW1ABVOL, &value);
+ value &= ~0x3f;
+ value |= vddarm;
+ pmic_reg_write(p, PFUZE100_SW1ABVOL, value);
+
+ /* decrease VDDSOC to 1.175V */
+ pmic_reg_read(p, PFUZE100_SW1CVOL, &value);
+ value &= ~0x3f;
+ value |= PFUZE100_SW1ABC_SETP(11750);
+ pmic_reg_write(p, PFUZE100_SW1CVOL, value);
+
+ finish_anatop_bypass();
+ printf("switch to ldo_bypass mode!\n");
+ }
+}
+#endif
+
#ifdef CONFIG_MXC_SPI
int board_spi_cs_gpio(unsigned bus, unsigned cs)
{
diff --git a/include/configs/mx6sabresd.h b/include/configs/mx6sabresd.h
index 99d9d4d..70dbf30 100644
--- a/include/configs/mx6sabresd.h
+++ b/include/configs/mx6sabresd.h
@@ -60,6 +60,8 @@
#define CONFIG_POWER_PFUZE100
#define CONFIG_POWER_PFUZE100_I2C_ADDR 0x08
+#define CONFIG_LDO_BYPASS_CHECK
+
/* USB Configs */
#define CONFIG_CMD_USB
#ifdef CONFIG_CMD_USB
--
1.8.4
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