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ARM: OMAP5: Power: Add more functionality to Palmas driver

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Add some useful functions, and the corresponding definitions.

Add support for powering on the dra7xx_evm SD/MMC LDO
(courtesy Lokesh Vutla <lokeshvutla@ti.com>).

Signed-off-by: Lubomir Popov <lpopov@mm-sol.com>
Reviewed-by: Tom Rini <trini@ti.com>
master
Lubomir Popov 11 years ago committed by Tom Rini
parent 92b0482c17
commit e9090fa45a
2 changed files with 204 additions and 19 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 133
      drivers/power/palmas.c
  2. 90
      include/palmas.h

133
drivers/power/palmas.c
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@ -25,28 +25,137 @@
void palmas_init_settings(void)
{
return;
#ifdef CONFIG_PALMAS_SMPS7_FPWM
int err;
/*
* Set SMPS7 (1.8 V I/O supply on platforms with TWL6035/37) to
* forced PWM mode. This reduces noise (but affects efficiency).
*/
u8 val = SMPS_MODE_SLP_FPWM | SMPS_MODE_ACT_FPWM;
err = palmas_i2c_write_u8(TWL603X_CHIP_P1, SMPS7_CTRL, val);
if (err)
printf("palmas: could not force PWM for SMPS7: err = %d\n",
err);
#endif
}
int palmas_mmc1_poweron_ldo(void)
{
u8 val = 0;
/* set LDO9 TWL6035 to 3V */
val = 0x2b; /* (3 -.9)*28 +1 */
if (palmas_i2c_write_u8(0x48, LDO9_VOLTAGE, val)) {
printf("twl6035: could not set LDO9 voltage.\n");
#if defined(CONFIG_DRA7XX)
/*
* Currently valid for the dra7xx_evm board:
* Set TPS659038 LDO1 to 3.0 V
*/
val = LDO_VOLT_3V0;
if (palmas_i2c_write_u8(TPS65903X_CHIP_P1, LDO1_VOLTAGE, val)) {
printf("tps65903x: could not set LDO1 voltage.\n");
return 1;
}
/* TURN ON LDO1 */
val = RSC_MODE_SLEEP | RSC_MODE_ACTIVE;
if (palmas_i2c_write_u8(TPS65903X_CHIP_P1, LDO1_CTRL, val)) {
printf("tps65903x: could not turn on LDO1.\n");
return 1;
}
return 0;
#else
/*
* We assume that this is a OMAP543X + TWL603X board:
* Set TWL6035/37 LDO9 to 3.0 V
*/
val = LDO_VOLT_3V0;
return twl603x_mmc1_set_ldo9(val);
#endif
}
/* TURN ON LDO9 */
val = LDO_ON | LDO_MODE_SLEEP | LDO_MODE_ACTIVE;
/*
* On some OMAP5 + TWL603X hardware the SD card socket and LDO9_IN are
* powered by an external 3.3 V regulator, while the output of LDO9
* supplies VDDS_SDCARD for the OMAP5 interface only. This implies that
* LDO9 could be set to 'bypass' mode when required (e.g. for 3.3 V cards).
*/
int twl603x_mmc1_set_ldo9(u8 vsel)
{
u8 cval = 0, vval = 0; /* Off by default */
int err;
if (palmas_i2c_write_u8(0x48, LDO9_CTRL, val)) {
printf("twl6035: could not turn on LDO9.\n");
return 1;
if (vsel) {
/* Turn on */
if (vsel > LDO_VOLT_3V3) {
/* Put LDO9 in bypass */
cval = LDO9_BYP_EN | RSC_MODE_SLEEP | RSC_MODE_ACTIVE;
vval = LDO_VOLT_3V3;
} else {
cval = RSC_MODE_SLEEP | RSC_MODE_ACTIVE;
vval = vsel & 0x3f;
}
}
err = palmas_i2c_write_u8(TWL603X_CHIP_P1, LDO9_VOLTAGE, vval);
if (err) {
printf("twl603x: could not set LDO9 %s: err = %d\n",
vsel > LDO_VOLT_3V3 ? "bypass" : "voltage", err);
return err;
}
err = palmas_i2c_write_u8(TWL603X_CHIP_P1, LDO9_CTRL, cval);
if (err)
printf("twl603x: could not turn %s LDO9: err = %d\n",
cval ? "on" : "off", err);
return err;
}
return 0;
#ifdef CONFIG_PALMAS_AUDPWR
/*
* Turn audio codec power and 32 kHz clock on/off. Use for
* testing OMAP543X + TWL603X + TWL604X boards only.
*/
int twl603x_audio_power(u8 on)
{
u8 cval = 0, vval = 0, c32k = 0;
int err;
if (on) {
vval = SMPS_VOLT_2V1;
cval = SMPS_MODE_SLP_AUTO | SMPS_MODE_ACT_AUTO;
c32k = RSC_MODE_SLEEP | RSC_MODE_ACTIVE;
}
/* Set SMPS9 to 2.1 V (for TWL604x), or to 0 (off) */
err = palmas_i2c_write_u8(TWL603X_CHIP_P1, SMPS9_VOLTAGE, vval);
if (err) {
printf("twl603x: could not set SMPS9 voltage: err = %d\n",
err);
return err;
}
/* Turn on or off SMPS9 */
err = palmas_i2c_write_u8(TWL603X_CHIP_P1, SMPS9_CTRL, cval);
if (err) {
printf("twl603x: could not turn SMPS9 %s: err = %d\n",
cval ? "on" : "off", err);
return err;
}
/* Output 32 kHz clock on or off */
err = palmas_i2c_write_u8(TWL603X_CHIP_P1, CLK32KGAUDIO_CTRL, c32k);
if (err)
printf("twl603x: could not turn CLK32KGAUDIO %s: err = %d\n",
c32k ? "on" : "off", err);
return err;
}
#endif
/*
* Enable/disable back-up battery (or super cap) charging on TWL6035/37.
* Please use defined BB_xxx values.
*/
int twl603x_enable_bb_charge(u8 bb_fields)
{
u8 val = bb_fields & 0x0f;
int err;
val |= (VRTC_EN_SLP | VRTC_EN_OFF | VRTC_PWEN);
err = palmas_i2c_write_u8(TWL603X_CHIP_P1, BB_VRTC_CTRL, val);
if (err)
printf("twl603x: could not set BB_VRTC_CTRL to 0x%02x: err = %d\n",
val, err);
return err;
}

90
include/palmas.h
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@ -26,17 +26,90 @@
#include <common.h>
#include <i2c.h>
/* I2C chip addresses */
#define PALMAS_CHIP_ADDR 0x48
/* I2C chip addresses, TW6035/37 */
#define TWL603X_CHIP_P1 0x48 /* Page 1 */
#define TWL603X_CHIP_P2 0x49 /* Page 2 */
#define TWL603X_CHIP_P3 0x4a /* Page 3 */
/* 0x1XY translates to page 1, register address 0xXY */
/* TPS659038/39 */
#define TPS65903X_CHIP_P1 0x58 /* Page 1 */
/* Page 1 registers (0x1XY translates to page 1, reg addr 0xXY): */
/* LDO1 control/voltage */
#define LDO1_CTRL 0x50
#define LDO1_VOLTAGE 0x51
/* LDO9 control/voltage */
#define LDO9_CTRL 0x60
#define LDO9_VOLTAGE 0x61
/* Bit field definitions for LDOx_CTRL */
#define LDO_ON (1 << 4)
#define LDO_MODE_SLEEP (1 << 2)
#define LDO_MODE_ACTIVE (1 << 0)
/* LDOUSB control/voltage */
#define LDOUSB_CTRL 0x64
#define LDOUSB_VOLTAGE 0x65
/* Control of 32 kHz audio clock */
#define CLK32KGAUDIO_CTRL 0xd5
/* SYSEN2_CTRL for VCC_3v3_AUX supply on the sEVM */
#define SYSEN2_CTRL 0xd9
/*
* Bit field definitions for LDOx_CTRL, SYSENx_CTRL
* and some other xxx_CTRL resources:
*/
#define LDO9_BYP_EN (1 << 6) /* LDO9 only! */
#define RSC_STAT_ON (1 << 4) /* RO status bit! */
#define RSC_MODE_SLEEP (1 << 2)
#define RSC_MODE_ACTIVE (1 << 0)
/* Some LDO voltage values */
#define LDO_VOLT_OFF 0
#define LDO_VOLT_1V8 0x13
#define LDO_VOLT_3V0 0x2b
#define LDO_VOLT_3V3 0x31
/* Request bypass, LDO9 only */
#define LDO9_BYPASS 0x3f
/* SMPS7_CTRL */
#define SMPS7_CTRL 0x30
/* SMPS9_CTRL */
#define SMPS9_CTRL 0x38
#define SMPS9_VOLTAGE 0x3b
/* Bit field definitions for SMPSx_CTRL */
#define SMPS_MODE_ACT_AUTO 1
#define SMPS_MODE_ACT_ECO 2
#define SMPS_MODE_ACT_FPWM 3
#define SMPS_MODE_SLP_AUTO (1 << 2)
#define SMPS_MODE_SLP_ECO (2 << 2)
#define SMPS_MODE_SLP_FPWM (3 << 2)
/*
* Some popular SMPS voltages, all with RANGE=1; note
* that RANGE cannot be changed on the fly
*/
#define SMPS_VOLT_OFF 0
#define SMPS_VOLT_1V2 0x90
#define SMPS_VOLT_1V8 0xae
#define SMPS_VOLT_2V1 0xbd
#define SMPS_VOLT_3V0 0xea
#define SMPS_VOLT_3V3 0xf9
/* Backup Battery & VRTC Control */
#define BB_VRTC_CTRL 0xa8
/* Bit definitions for BB_VRTC_CTRL */
#define VRTC_EN_SLP (1 << 6)
#define VRTC_EN_OFF (1 << 5)
#define VRTC_PWEN (1 << 4)
#define BB_LOW_ICHRG (1 << 3)
#define BB_HIGH_ICHRG (0 << 3)
#define BB_VSEL_3V0 (0 << 1)
#define BB_VSEL_2V5 (1 << 1)
#define BB_VSEL_3V15 (2 << 1)
#define BB_VSEL_VBAT (3 << 1)
#define BB_CHRG_EN (1 << 0)
/*
* Functions to read and write from TPS659038/TWL6035/TWL6037
@ -54,5 +127,8 @@ static inline int palmas_i2c_read_u8(u8 chip_no, u8 reg, u8 *val)
void palmas_init_settings(void);
int palmas_mmc1_poweron_ldo(void);
int twl603x_mmc1_set_ldo9(u8 vsel);
int twl603x_audio_power(u8 on);
int twl603x_enable_bb_charge(u8 bb_fields);
#endif /* PALMAS_H */

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