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omap5: pbias ldo9 turn on

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Add omap5 pbias configuration for mmc1/sd lines
and set voltage for sd data i/o lines

Signed-off-by: Balaji T K <balajitk@ti.com>
This commit is contained in:
Balaji T K 2012-03-12 02:25:49 +00:00 committed by Albert ARIBAUD
parent 2114429896
commit dd23e59d59
4 changed files with 63 additions and 3 deletions
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7
arch/arm/include/asm/arch-omap5/omap.h
View file

@ -125,9 +125,10 @@
/* CONTROL_EFUSE_2 */
#define CONTROL_EFUSE_2_NMOS_PMOS_PTV_CODE_1 0x00ffc000
#define MMC1_PWRDNZ (1 << 26)
#define MMC1_PBIASLITE_PWRDNZ (1 << 22)
#define MMC1_PBIASLITE_VMODE (1 << 21)
#define SDCARD_PWRDNZ (1 << 26)
#define SDCARD_BIAS_HIZ_MODE (1 << 25)
#define SDCARD_BIAS_PWRDNZ (1 << 22)
#define SDCARD_PBIASLITE_VMODE (1 << 21)
#ifndef __ASSEMBLY__

33
drivers/mmc/omap_hsmmc.c
View file

@ -29,6 +29,7 @@
#include <i2c.h>
#include <twl4030.h>
#include <twl6030.h>
#include <twl6035.h>
#include <asm/io.h>
#include <asm/arch/mmc_host_def.h>
#include <asm/arch/sys_proto.h>
@ -60,6 +61,34 @@ static void omap4_vmmc_pbias_config(struct mmc *mmc)
}
#endif
#if defined(CONFIG_OMAP54XX) && defined(CONFIG_TWL6035_POWER)
static void omap5_pbias_config(struct mmc *mmc)
{
u32 value = 0;
struct omap_sys_ctrl_regs *const ctrl =
(struct omap_sys_ctrl_regs *) SYSCTRL_GENERAL_CORE_BASE;
value = readl(&ctrl->control_pbias);
value &= ~(SDCARD_PWRDNZ | SDCARD_BIAS_PWRDNZ);
value |= SDCARD_BIAS_HIZ_MODE;
writel(value, &ctrl->control_pbias);
twl6035_mmc1_poweron_ldo();
value = readl(&ctrl->control_pbias);
value &= ~SDCARD_BIAS_HIZ_MODE;
value |= SDCARD_PBIASLITE_VMODE | SDCARD_PWRDNZ | SDCARD_BIAS_PWRDNZ;
writel(value, &ctrl->control_pbias);
value = readl(&ctrl->control_pbias);
if (value & (1 << 23)) {
value &= ~(SDCARD_PWRDNZ | SDCARD_BIAS_PWRDNZ);
value |= SDCARD_BIAS_HIZ_MODE;
writel(value, &ctrl->control_pbias);
}
}
#endif
unsigned char mmc_board_init(struct mmc *mmc)
{
#if defined(CONFIG_TWL4030_POWER)
@ -99,6 +128,10 @@ unsigned char mmc_board_init(struct mmc *mmc)
if (mmc->block_dev.dev == 0)
omap4_vmmc_pbias_config(mmc);
#endif
#if defined(CONFIG_OMAP54XX) && defined(CONFIG_TWL6035_POWER)
if (mmc->block_dev.dev == 0)
omap5_pbias_config(mmc);
#endif
return 0;
}

25
drivers/power/twl6035.c
View file

@ -34,7 +34,32 @@ int twl6035_i2c_read_u8(u8 chip_no, u8 *val, u8 reg)
return i2c_read(chip_no, reg, 1, val, 1);
}
/* To align with i2c mw/mr address, reg, val command syntax */
static inline int palmas_write_u8(u8 chip_no, u8 reg, u8 val)
{
return i2c_write(chip_no, reg, 1, &val, 1);
}
static inline int palmas_read_u8(u8 chip_no, u8 reg, u8 *val)
{
return i2c_read(chip_no, reg, 1, val, 1);
}
void twl6035_init_settings(void)
{
return;
}
void twl6035_mmc1_poweron_ldo(void)
{
u8 val = 0;
/* set LDO9 TWL6035 to 3V */
val = 0x2b; /* (3 -.9)*28 +1 */
palmas_write_u8(0x48, LDO9_VOLTAGE, val);
/* TURN ON LDO9 */
val = LDO_ON | LDO_MODE_SLEEP | LDO_MODE_ACTIVE;
palmas_write_u8(0x48, LDO9_CTRL, val);
return;
}

1
include/twl6035.h
View file

@ -39,3 +39,4 @@
int twl6035_i2c_write_u8(u8 chip_no, u8 val, u8 reg);
int twl6035_i2c_read_u8(u8 chip_no, u8 *val, u8 reg);
void twl6035_init_settings(void);
void twl6035_mmc1_poweron_ldo(void);