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mfd: Make anatop register accessor more flexible and rename meaningfully

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- rename to anatop_read_reg and anatop_write_reg
 - anatop_read_reg directly return reg value
 - anatop_write_reg write reg with mask

Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Reviewed-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Richard Zhao 2012-05-13 09:18:02 +08:00 committed by Samuel Ortiz
parent 08b4c118af
commit b09530ef84
3 changed files with 21 additions and 36 deletions
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35
drivers/mfd/anatop-mfd.c
View File

@ -41,39 +41,26 @@
#include <linux/of_address.h>
#include <linux/mfd/anatop.h>
u32 anatop_get_bits(struct anatop *adata, u32 addr, int bit_shift,
int bit_width)
u32 anatop_read_reg(struct anatop *adata, u32 addr)
{
u32 val, mask;
if (bit_width == 32)
mask = ~0;
else
mask = (1 << bit_width) - 1;
val = readl(adata->ioreg + addr);
val = (val >> bit_shift) & mask;
return val;
return readl(adata->ioreg + addr);
}
EXPORT_SYMBOL_GPL(anatop_get_bits);
EXPORT_SYMBOL_GPL(anatop_read_reg);
void anatop_set_bits(struct anatop *adata, u32 addr, int bit_shift,
int bit_width, u32 data)
void anatop_write_reg(struct anatop *adata, u32 addr, u32 data, u32 mask)
{
u32 val, mask;
u32 val;
if (bit_width == 32)
mask = ~0;
else
mask = (1 << bit_width) - 1;
data &= mask;
spin_lock(&adata->reglock);
val = readl(adata->ioreg + addr) & ~(mask << bit_shift);
writel((data << bit_shift) | val, adata->ioreg + addr);
val = readl(adata->ioreg + addr);
val &= ~mask;
val |= data;
writel(val, adata->ioreg + addr);
spin_unlock(&adata->reglock);
}
EXPORT_SYMBOL_GPL(anatop_set_bits);
EXPORT_SYMBOL_GPL(anatop_write_reg);
static const struct of_device_id of_anatop_match[] = {
{ .compatible = "fsl,imx6q-anatop", },

18
drivers/regulator/anatop-regulator.c
View File

@ -47,7 +47,7 @@ static int anatop_set_voltage(struct regulator_dev *reg, int min_uV,
int max_uV, unsigned *selector)
{
struct anatop_regulator *anatop_reg = rdev_get_drvdata(reg);
u32 val, sel;
u32 val, sel, mask;
int uv;
uv = min_uV;
@ -71,11 +71,10 @@ static int anatop_set_voltage(struct regulator_dev *reg, int min_uV,
val = anatop_reg->min_bit_val + sel;
*selector = sel;
dev_dbg(&reg->dev, "%s: calculated val %d\n", __func__, val);
anatop_set_bits(anatop_reg->mfd,
anatop_reg->control_reg,
anatop_reg->vol_bit_shift,
anatop_reg->vol_bit_width,
val);
mask = ((1 << anatop_reg->vol_bit_width) - 1) <<
anatop_reg->vol_bit_shift;
val <<= anatop_reg->vol_bit_shift;
anatop_write_reg(anatop_reg->mfd, anatop_reg->control_reg, val, mask);
return 0;
}
@ -88,10 +87,9 @@ static int anatop_get_voltage_sel(struct regulator_dev *reg)
if (!anatop_reg->control_reg)
return -ENOTSUPP;
val = anatop_get_bits(anatop_reg->mfd,
anatop_reg->control_reg,
anatop_reg->vol_bit_shift,
anatop_reg->vol_bit_width);
val = anatop_read_reg(anatop_reg->mfd, anatop_reg->control_reg);
val = (val & ((1 << anatop_reg->vol_bit_width) - 1)) >>
anatop_reg->vol_bit_shift;
return val - anatop_reg->min_bit_val;
}

4
include/linux/mfd/anatop.h
View File

@ -34,7 +34,7 @@ struct anatop {
spinlock_t reglock;
};
extern u32 anatop_get_bits(struct anatop *, u32, int, int);
extern void anatop_set_bits(struct anatop *, u32, int, int, u32);
extern u32 anatop_read_reg(struct anatop *, u32);
extern void anatop_write_reg(struct anatop *, u32, u32, u32);
#endif /* __LINUX_MFD_ANATOP_H */