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sh: pfc: Add gpio_read_bit() for data register access

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Introduce gpio_read_bit() for data register read access
and modify sh_gpio_get_value() to make use of the new
function instead of gpio_read_reg(). The purpose of
this change is to update the code to only use the
gpio_read_reg() function for config register access.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2011-12-14 01:00:37 +09:00 committed by Paul Mundt
parent b0e10211cb
commit 92554d97c6
1 changed files with 14 additions and 1 deletions
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15
drivers/sh/pfc.c
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@ -135,6 +135,19 @@ static void gpio_write_raw_reg(void __iomem *mapped_reg,
BUG();
}
static int gpio_read_bit(struct pinmux_data_reg *dr,
unsigned long in_pos)
{
unsigned long pos;
pos = dr->reg_width - (in_pos + 1);
pr_debug("read_bit: addr = %lx, pos = %ld, "
"r_width = %ld\n", dr->reg, pos, dr->reg_width);
return (gpio_read_raw_reg(dr->mapped_reg, dr->reg_width) >> pos) & 1;
}
static void gpio_write_bit(struct pinmux_data_reg *dr,
unsigned long in_pos, unsigned long value)
{
@ -644,7 +657,7 @@ static int sh_gpio_get_value(struct pinmux_info *gpioc, unsigned gpio)
if (!gpioc || get_data_reg(gpioc, gpio, &dr, &bit) != 0)
return -EINVAL;
return gpio_read_reg(dr->mapped_reg, dr->reg_width, 1, bit, dr->reg);
return gpio_read_bit(dr, bit);
}
static int sh_gpio_get(struct gpio_chip *chip, unsigned offset)