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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 <[email protected]>
Reviewed-by: Ying-Chun Liu (PaulLiu) <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
This commit is contained in:
Richard Zhao 2012-05-13 09:18:02 +08:00 • committed by Samuel Ortiz
commit b09530ef84
3 changed files with 21 additions and 36 deletions
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35
drivers/mfd/anatop-mfd.c
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@ -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", },