[U-Boot] [PATCH 08/12] imx:mx6slevk add ldo mode set function

[Peng Fan]

Add ldo_mode_set function. 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>
---
 board/freescale/mx6slevk/mx6slevk.c | 61 ++++++++++++++++++++++++++++++++++---
 include/configs/mx6slevk.h          |  2 ++
 2 files changed, 59 insertions(+), 4 deletions(-)

diff --git a/board/freescale/mx6slevk/mx6slevk.c 
b/board/freescale/mx6slevk/mx6slevk.c
index f74b237..fdb6672 100644
--- a/board/freescale/mx6slevk/mx6slevk.c
+++ b/board/freescale/mx6slevk/mx6slevk.c
@@ -247,16 +247,69 @@ struct i2c_pads_info i2c_pad_info1 = {
        },
 };
 
+static struct pmic *pfuze;
+
+#ifdef CONFIG_LDO_BYPASS_CHECK
+void ldo_mode_set(int ldo_bypass)
+{
+       u32 value;
+       int is_400M;
+       struct pmic *p = pfuze;
+
+       if (!p)
+               return;
+
+       /* swith to ldo_bypass mode */
+       if (ldo_bypass) {
+               prep_anatop_bypass();
+
+               /* decrease VDDARM to 1.1V */
+               pmic_reg_read(p, PFUZE100_SW1ABVOL, &value);
+               value &= ~0x3f;
+               value |= PFUZE100_SW1ABC_SETP(11000);
+               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);
+
+               is_400M = set_anatop_bypass(0);
+
+               /*
+                * MX6SL: VDDARM:1.175V@800M; VDDSOC:1.175V@800M
+                *        VDDARM:0.975V@400M; VDDSOC:1.175V@400M
+                */
+               pmic_reg_read(p, PFUZE100_SW1ABVOL, &value);
+               value &= ~0x3f;
+               if (is_400M)
+                       value |= PFUZE100_SW1ABC_SETP(9750);
+               else
+                       value |= PFUZE100_SW1ABC_SETP(11750);
+               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
+
 int power_init_board(void)
 {
-       struct pmic *p;
        unsigned int ret;
 
-       p = pfuze_common_init(I2C_PMIC);
-       if (!p)
+       pfuze = pfuze_common_init(I2C_PMIC);
+       if (!pfuze)
                return -ENODEV;
 
-       ret = pfuze_mode_init(p, APS_PFM);
+       ret = pfuze_mode_init(pfuze, APS_PFM);
        if (ret < 0)
                return -EIO;
 
diff --git a/include/configs/mx6slevk.h b/include/configs/mx6slevk.h
index 9fd7619..56c2faf 100644
--- a/include/configs/mx6slevk.h
+++ b/include/configs/mx6slevk.h
@@ -60,6 +60,8 @@
 #define CONFIG_POWER_PFUZE100
 #define CONFIG_POWER_PFUZE100_I2C_ADDR 0x08
 
+#define CONFIG_LDO_BYPASS_CHECK
+
 #define CONFIG_CMD_PING
 #define CONFIG_CMD_DHCP
 #define CONFIG_CMD_MII
-- 
1.8.4


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