mfd: Make anatop register accessor more flexible and rename meaningfully
- 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>
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@ -41,39 +41,26 @@
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#include <linux/of_address.h>
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#include <linux/mfd/anatop.h>
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u32 anatop_get_bits(struct anatop *adata, u32 addr, int bit_shift,
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int bit_width)
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u32 anatop_read_reg(struct anatop *adata, u32 addr)
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{
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u32 val, mask;
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if (bit_width == 32)
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mask = ~0;
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else
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mask = (1 << bit_width) - 1;
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val = readl(adata->ioreg + addr);
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val = (val >> bit_shift) & mask;
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return val;
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return readl(adata->ioreg + addr);
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}
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EXPORT_SYMBOL_GPL(anatop_get_bits);
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EXPORT_SYMBOL_GPL(anatop_read_reg);
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void anatop_set_bits(struct anatop *adata, u32 addr, int bit_shift,
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int bit_width, u32 data)
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void anatop_write_reg(struct anatop *adata, u32 addr, u32 data, u32 mask)
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{
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u32 val, mask;
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u32 val;
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if (bit_width == 32)
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mask = ~0;
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else
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mask = (1 << bit_width) - 1;
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data &= mask;
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spin_lock(&adata->reglock);
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val = readl(adata->ioreg + addr) & ~(mask << bit_shift);
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writel((data << bit_shift) | val, adata->ioreg + addr);
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val = readl(adata->ioreg + addr);
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val &= ~mask;
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val |= data;
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writel(val, adata->ioreg + addr);
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spin_unlock(&adata->reglock);
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}
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EXPORT_SYMBOL_GPL(anatop_set_bits);
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EXPORT_SYMBOL_GPL(anatop_write_reg);
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static const struct of_device_id of_anatop_match[] = {
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{ .compatible = "fsl,imx6q-anatop", },
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@ -47,7 +47,7 @@ static int anatop_set_voltage(struct regulator_dev *reg, int min_uV,
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int max_uV, unsigned *selector)
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{
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struct anatop_regulator *anatop_reg = rdev_get_drvdata(reg);
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u32 val, sel;
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u32 val, sel, mask;
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int uv;
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uv = min_uV;
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@ -71,11 +71,10 @@ static int anatop_set_voltage(struct regulator_dev *reg, int min_uV,
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val = anatop_reg->min_bit_val + sel;
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*selector = sel;
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dev_dbg(®->dev, "%s: calculated val %d\n", __func__, val);
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anatop_set_bits(anatop_reg->mfd,
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anatop_reg->control_reg,
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anatop_reg->vol_bit_shift,
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anatop_reg->vol_bit_width,
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val);
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mask = ((1 << anatop_reg->vol_bit_width) - 1) <<
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anatop_reg->vol_bit_shift;
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val <<= anatop_reg->vol_bit_shift;
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anatop_write_reg(anatop_reg->mfd, anatop_reg->control_reg, val, mask);
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return 0;
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}
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@ -88,10 +87,9 @@ static int anatop_get_voltage_sel(struct regulator_dev *reg)
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if (!anatop_reg->control_reg)
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return -ENOTSUPP;
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val = anatop_get_bits(anatop_reg->mfd,
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anatop_reg->control_reg,
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anatop_reg->vol_bit_shift,
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anatop_reg->vol_bit_width);
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val = anatop_read_reg(anatop_reg->mfd, anatop_reg->control_reg);
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val = (val & ((1 << anatop_reg->vol_bit_width) - 1)) >>
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anatop_reg->vol_bit_shift;
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return val - anatop_reg->min_bit_val;
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}
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@ -34,7 +34,7 @@ struct anatop {
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spinlock_t reglock;
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};
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extern u32 anatop_get_bits(struct anatop *, u32, int, int);
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extern void anatop_set_bits(struct anatop *, u32, int, int, u32);
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extern u32 anatop_read_reg(struct anatop *, u32);
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extern void anatop_write_reg(struct anatop *, u32, u32, u32);
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#endif /* __LINUX_MFD_ANATOP_H */
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