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Date: Tue, 13 Mar 2012 06:40:48 +0800
From: Axel Lin <axel.lin@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Margarita Olaya Cabrera <magi@...mlogic.co.uk>,
Liam Girdwood <lrg@...com>,
Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH] regulator: Use simple equations to get register address
The address of ctrl and sel registers can be calculated by simple equations.
This patch simplifies the implementation in tps65912_get_ctrl_register and
implements tps65912_get_sel_register to replace tps65912_get_dcdc_sel_register
and tps65912_get_ldo_sel_register.
Signed-off-by: Axel Lin <axel.lin@...il.com>
---
drivers/regulator/tps65912-regulator.c | 162 ++++----------------------------
1 files changed, 18 insertions(+), 144 deletions(-)
diff --git a/drivers/regulator/tps65912-regulator.c b/drivers/regulator/tps65912-regulator.c
index b685757..9c4d827 100644
--- a/drivers/regulator/tps65912-regulator.c
+++ b/drivers/regulator/tps65912-regulator.c
@@ -219,146 +219,30 @@ static unsigned long tps65912_vsel_to_uv_ldo(u8 vsel)
static int tps65912_get_ctrl_register(int id)
{
- switch (id) {
- case TPS65912_REG_DCDC1:
- return TPS65912_DCDC1_AVS;
- case TPS65912_REG_DCDC2:
- return TPS65912_DCDC2_AVS;
- case TPS65912_REG_DCDC3:
- return TPS65912_DCDC3_AVS;
- case TPS65912_REG_DCDC4:
- return TPS65912_DCDC4_AVS;
- case TPS65912_REG_LDO1:
- return TPS65912_LDO1_AVS;
- case TPS65912_REG_LDO2:
- return TPS65912_LDO2_AVS;
- case TPS65912_REG_LDO3:
- return TPS65912_LDO3_AVS;
- case TPS65912_REG_LDO4:
- return TPS65912_LDO4_AVS;
- case TPS65912_REG_LDO5:
- return TPS65912_LDO5;
- case TPS65912_REG_LDO6:
- return TPS65912_LDO6;
- case TPS65912_REG_LDO7:
- return TPS65912_LDO7;
- case TPS65912_REG_LDO8:
- return TPS65912_LDO8;
- case TPS65912_REG_LDO9:
- return TPS65912_LDO9;
- case TPS65912_REG_LDO10:
- return TPS65912_LDO10;
- default:
+ if (id >= TPS65912_REG_DCDC1 && id <= TPS65912_REG_LDO4)
+ return id * 3 + TPS65912_DCDC1_AVS;
+ else if (id >= TPS65912_REG_LDO5 && id <= TPS65912_REG_LDO10)
+ return id - TPS65912_REG_LDO5 + TPS65912_LDO5;
+ else
return -EINVAL;
- }
}
-static int tps65912_get_dcdc_sel_register(struct tps65912_reg *pmic, int id)
+static int tps65912_get_sel_register(struct tps65912_reg *pmic, int id)
{
struct tps65912 *mfd = pmic->mfd;
- int opvsel = 0, sr = 0;
+ int opvsel;
u8 reg = 0;
- if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_DCDC4)
- return -EINVAL;
-
- switch (id) {
- case TPS65912_REG_DCDC1:
- opvsel = tps65912_reg_read(mfd, TPS65912_DCDC1_OP);
- sr = ((opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT);
- if (sr)
- reg = TPS65912_DCDC1_AVS;
+ if (id >= TPS65912_REG_DCDC1 && id <= TPS65912_REG_LDO4) {
+ opvsel = tps65912_reg_read(mfd, id * 3 + TPS65912_DCDC1_OP);
+ if (opvsel & OP_SELREG_MASK)
+ reg = id * 3 + TPS65912_DCDC1_AVS;
else
- reg = TPS65912_DCDC1_OP;
- break;
- case TPS65912_REG_DCDC2:
- opvsel = tps65912_reg_read(mfd, TPS65912_DCDC2_OP);
- sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
- if (sr)
- reg = TPS65912_DCDC2_AVS;
- else
- reg = TPS65912_DCDC2_OP;
- break;
- case TPS65912_REG_DCDC3:
- opvsel = tps65912_reg_read(mfd, TPS65912_DCDC3_OP);
- sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
- if (sr)
- reg = TPS65912_DCDC3_AVS;
- else
- reg = TPS65912_DCDC3_OP;
- break;
- case TPS65912_REG_DCDC4:
- opvsel = tps65912_reg_read(mfd, TPS65912_DCDC4_OP);
- sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
- if (sr)
- reg = TPS65912_DCDC4_AVS;
- else
- reg = TPS65912_DCDC4_OP;
- break;
- }
- return reg;
-}
-
-static int tps65912_get_ldo_sel_register(struct tps65912_reg *pmic, int id)
-{
- struct tps65912 *mfd = pmic->mfd;
- int opvsel = 0, sr = 0;
- u8 reg = 0;
-
- if (id < TPS65912_REG_LDO1 || id > TPS65912_REG_LDO10)
+ reg = id * 3 + TPS65912_DCDC1_OP;
+ } else if (id >= TPS65912_REG_LDO5 && id <= TPS65912_REG_LDO10) {
+ reg = id - TPS65912_REG_LDO5 + TPS65912_LDO5;
+ } else {
return -EINVAL;
-
- switch (id) {
- case TPS65912_REG_LDO1:
- opvsel = tps65912_reg_read(mfd, TPS65912_LDO1_OP);
- sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
- if (sr)
- reg = TPS65912_LDO1_AVS;
- else
- reg = TPS65912_LDO1_OP;
- break;
- case TPS65912_REG_LDO2:
- opvsel = tps65912_reg_read(mfd, TPS65912_LDO2_OP);
- sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
- if (sr)
- reg = TPS65912_LDO2_AVS;
- else
- reg = TPS65912_LDO2_OP;
- break;
- case TPS65912_REG_LDO3:
- opvsel = tps65912_reg_read(mfd, TPS65912_LDO3_OP);
- sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
- if (sr)
- reg = TPS65912_LDO3_AVS;
- else
- reg = TPS65912_LDO3_OP;
- break;
- case TPS65912_REG_LDO4:
- opvsel = tps65912_reg_read(mfd, TPS65912_LDO4_OP);
- sr = (opvsel & OP_SELREG_MASK) >> OP_SELREG_SHIFT;
- if (sr)
- reg = TPS65912_LDO4_AVS;
- else
- reg = TPS65912_LDO4_OP;
- break;
- case TPS65912_REG_LDO5:
- reg = TPS65912_LDO5;
- break;
- case TPS65912_REG_LDO6:
- reg = TPS65912_LDO6;
- break;
- case TPS65912_REG_LDO7:
- reg = TPS65912_LDO7;
- break;
- case TPS65912_REG_LDO8:
- reg = TPS65912_LDO8;
- break;
- case TPS65912_REG_LDO9:
- reg = TPS65912_LDO9;
- break;
- case TPS65912_REG_LDO10:
- reg = TPS65912_LDO10;
- break;
}
return reg;
@@ -597,7 +481,7 @@ static int tps65912_set_voltage_dcdc(struct regulator_dev *dev,
int value;
u8 reg;
- reg = tps65912_get_dcdc_sel_register(pmic, id);
+ reg = tps65912_get_sel_register(pmic, id);
value = tps65912_reg_read(mfd, reg);
value &= 0xC0;
return tps65912_reg_write(mfd, reg, selector | value);
@@ -611,7 +495,7 @@ static int tps65912_get_voltage_ldo(struct regulator_dev *dev)
int vsel = 0;
u8 reg;
- reg = tps65912_get_ldo_sel_register(pmic, id);
+ reg = tps65912_get_sel_register(pmic, id);
vsel = tps65912_reg_read(mfd, reg);
vsel &= 0x3F;
@@ -625,7 +509,7 @@ static int tps65912_set_voltage_ldo(struct regulator_dev *dev,
struct tps65912 *mfd = pmic->mfd;
int id = rdev_get_id(dev), reg, value;
- reg = tps65912_get_ldo_sel_register(pmic, id);
+ reg = tps65912_get_sel_register(pmic, id);
value = tps65912_reg_read(mfd, reg);
value &= 0xC0;
return tps65912_reg_write(mfd, reg, selector | value);
@@ -748,22 +632,12 @@ static struct platform_driver tps65912_driver = {
.remove = __devexit_p(tps65912_remove),
};
-/**
- * tps65912_init
- *
- * Module init function
- */
static int __init tps65912_init(void)
{
return platform_driver_register(&tps65912_driver);
}
subsys_initcall(tps65912_init);
-/**
- * tps65912_cleanup
- *
- * Module exit function
- */
static void __exit tps65912_cleanup(void)
{
platform_driver_unregister(&tps65912_driver);
--
1.7.5.4
--
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