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mfd: palmas: Add support for external control configuration

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Some of Palmas resources like clock, SMPSs, LDOs etc can be controlled
by external pins ENABLE1, ENABLE2 or NSLEEP.

Add support to configure these resources to externally controlled.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Laxman Dewangan 2013-08-13 13:23:11 +05:30 committed by Samuel Ortiz
parent a0e08b8606
commit cc01b4639c
2 changed files with 146 additions and 0 deletions
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97
drivers/mfd/palmas.c
View File

@ -25,6 +25,52 @@
#include <linux/mfd/palmas.h>
#include <linux/of_device.h>
#define PALMAS_EXT_REQ (PALMAS_EXT_CONTROL_ENABLE1 | \
PALMAS_EXT_CONTROL_ENABLE2 | \
PALMAS_EXT_CONTROL_NSLEEP)
struct palmas_sleep_requestor_info {
int id;
int reg_offset;
int bit_pos;
};
#define EXTERNAL_REQUESTOR(_id, _offset, _pos) \
[PALMAS_EXTERNAL_REQSTR_ID_##_id] = { \
.id = PALMAS_EXTERNAL_REQSTR_ID_##_id, \
.reg_offset = _offset, \
.bit_pos = _pos, \
}
static struct palmas_sleep_requestor_info sleep_req_info[] = {
EXTERNAL_REQUESTOR(REGEN1, 0, 0),
EXTERNAL_REQUESTOR(REGEN2, 0, 1),
EXTERNAL_REQUESTOR(SYSEN1, 0, 2),
EXTERNAL_REQUESTOR(SYSEN2, 0, 3),
EXTERNAL_REQUESTOR(CLK32KG, 0, 4),
EXTERNAL_REQUESTOR(CLK32KGAUDIO, 0, 5),
EXTERNAL_REQUESTOR(REGEN3, 0, 6),
EXTERNAL_REQUESTOR(SMPS12, 1, 0),
EXTERNAL_REQUESTOR(SMPS3, 1, 1),
EXTERNAL_REQUESTOR(SMPS45, 1, 2),
EXTERNAL_REQUESTOR(SMPS6, 1, 3),
EXTERNAL_REQUESTOR(SMPS7, 1, 4),
EXTERNAL_REQUESTOR(SMPS8, 1, 5),
EXTERNAL_REQUESTOR(SMPS9, 1, 6),
EXTERNAL_REQUESTOR(SMPS10, 1, 7),
EXTERNAL_REQUESTOR(LDO1, 2, 0),
EXTERNAL_REQUESTOR(LDO2, 2, 1),
EXTERNAL_REQUESTOR(LDO3, 2, 2),
EXTERNAL_REQUESTOR(LDO4, 2, 3),
EXTERNAL_REQUESTOR(LDO5, 2, 4),
EXTERNAL_REQUESTOR(LDO6, 2, 5),
EXTERNAL_REQUESTOR(LDO7, 2, 6),
EXTERNAL_REQUESTOR(LDO8, 2, 7),
EXTERNAL_REQUESTOR(LDO9, 3, 0),
EXTERNAL_REQUESTOR(LDOLN, 3, 1),
EXTERNAL_REQUESTOR(LDOUSB, 3, 2),
};
static const struct regmap_config palmas_regmap_config[PALMAS_NUM_CLIENTS] = {
{
.reg_bits = 8,
@ -186,6 +232,57 @@ static struct regmap_irq_chip palmas_irq_chip = {
PALMAS_INT1_MASK),
};
int palmas_ext_control_req_config(struct palmas *palmas,
enum palmas_external_requestor_id id, int ext_ctrl, bool enable)
{
int preq_mask_bit = 0;
int reg_add = 0;
int bit_pos;
int ret;
if (!(ext_ctrl & PALMAS_EXT_REQ))
return 0;
if (id >= PALMAS_EXTERNAL_REQSTR_ID_MAX)
return 0;
if (ext_ctrl & PALMAS_EXT_CONTROL_NSLEEP) {
reg_add = PALMAS_NSLEEP_RES_ASSIGN;
preq_mask_bit = 0;
} else if (ext_ctrl & PALMAS_EXT_CONTROL_ENABLE1) {
reg_add = PALMAS_ENABLE1_RES_ASSIGN;
preq_mask_bit = 1;
} else if (ext_ctrl & PALMAS_EXT_CONTROL_ENABLE2) {
reg_add = PALMAS_ENABLE2_RES_ASSIGN;
preq_mask_bit = 2;
}
bit_pos = sleep_req_info[id].bit_pos;
reg_add += sleep_req_info[id].reg_offset;
if (enable)
ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE,
reg_add, BIT(bit_pos), BIT(bit_pos));
else
ret = palmas_update_bits(palmas, PALMAS_RESOURCE_BASE,
reg_add, BIT(bit_pos), 0);
if (ret < 0) {
dev_err(palmas->dev, "Resource reg 0x%02x update failed %d\n",
reg_add, ret);
return ret;
}
/* Unmask the PREQ */
ret = palmas_update_bits(palmas, PALMAS_PMU_CONTROL_BASE,
PALMAS_POWER_CTRL, BIT(preq_mask_bit), 0);
if (ret < 0) {
dev_err(palmas->dev, "POWER_CTRL register update failed %d\n",
ret);
return ret;
}
return ret;
}
EXPORT_SYMBOL_GPL(palmas_ext_control_req_config);
static int palmas_set_pdata_irq_flag(struct i2c_client *i2c,
struct palmas_platform_data *pdata)
{

49
include/linux/mfd/palmas.h
View File

@ -183,6 +183,50 @@ enum palmas_regulators {
PALMAS_NUM_REGS,
};
/* External controll signal name */
enum {
PALMAS_EXT_CONTROL_ENABLE1 = 0x1,
PALMAS_EXT_CONTROL_ENABLE2 = 0x2,
PALMAS_EXT_CONTROL_NSLEEP = 0x4,
};
/*
* Palmas device resources can be controlled externally for
* enabling/disabling it rather than register write through i2c.
* Add the external controlled requestor ID for different resources.
*/
enum palmas_external_requestor_id {
PALMAS_EXTERNAL_REQSTR_ID_REGEN1,
PALMAS_EXTERNAL_REQSTR_ID_REGEN2,
PALMAS_EXTERNAL_REQSTR_ID_SYSEN1,
PALMAS_EXTERNAL_REQSTR_ID_SYSEN2,
PALMAS_EXTERNAL_REQSTR_ID_CLK32KG,
PALMAS_EXTERNAL_REQSTR_ID_CLK32KGAUDIO,
PALMAS_EXTERNAL_REQSTR_ID_REGEN3,
PALMAS_EXTERNAL_REQSTR_ID_SMPS12,
PALMAS_EXTERNAL_REQSTR_ID_SMPS3,
PALMAS_EXTERNAL_REQSTR_ID_SMPS45,
PALMAS_EXTERNAL_REQSTR_ID_SMPS6,
PALMAS_EXTERNAL_REQSTR_ID_SMPS7,
PALMAS_EXTERNAL_REQSTR_ID_SMPS8,
PALMAS_EXTERNAL_REQSTR_ID_SMPS9,
PALMAS_EXTERNAL_REQSTR_ID_SMPS10,
PALMAS_EXTERNAL_REQSTR_ID_LDO1,
PALMAS_EXTERNAL_REQSTR_ID_LDO2,
PALMAS_EXTERNAL_REQSTR_ID_LDO3,
PALMAS_EXTERNAL_REQSTR_ID_LDO4,
PALMAS_EXTERNAL_REQSTR_ID_LDO5,
PALMAS_EXTERNAL_REQSTR_ID_LDO6,
PALMAS_EXTERNAL_REQSTR_ID_LDO7,
PALMAS_EXTERNAL_REQSTR_ID_LDO8,
PALMAS_EXTERNAL_REQSTR_ID_LDO9,
PALMAS_EXTERNAL_REQSTR_ID_LDOLN,
PALMAS_EXTERNAL_REQSTR_ID_LDOUSB,
/* Last entry */
PALMAS_EXTERNAL_REQSTR_ID_MAX,
};
struct palmas_pmic_platform_data {
/* An array of pointers to regulator init data indexed by regulator
* ID
@ -2866,4 +2910,9 @@ static inline int palmas_irq_get_virq(struct palmas *palmas, int irq)
return regmap_irq_get_virq(palmas->irq_data, irq);
}
int palmas_ext_control_req_config(struct palmas *palmas,
enum palmas_external_requestor_id ext_control_req_id,
int ext_ctrl, bool enable);
#endif /* __LINUX_MFD_PALMAS_H */