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sh: pfc: Unlock register support

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Add PFC support for a 32-bit unlock register. Needed to
drive the r8a7779 PFC that comes with a funky PMMR register.

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 01:01:14 +09:00 committed by Paul Mundt
parent f78a26f55b
commit e499ada829
2 changed files with 12 additions and 12 deletions
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22
drivers/sh/pfc.c
View File

@ -210,7 +210,7 @@ static void write_config_reg(struct pinmux_info *gpioc,
unsigned long field, unsigned long value)
{
void __iomem *mapped_reg;
unsigned long mask, pos;
unsigned long mask, pos, data;
config_reg_helper(gpioc, crp, field, &mapped_reg, &mask, &pos);
@ -221,17 +221,15 @@ static void write_config_reg(struct pinmux_info *gpioc,
mask = ~(mask << pos);
value = value << pos;
switch (crp->reg_width) {
case 8:
iowrite8((ioread8(mapped_reg) & mask) | value, mapped_reg);
break;
case 16:
iowrite16((ioread16(mapped_reg) & mask) | value, mapped_reg);
break;
case 32:
iowrite32((ioread32(mapped_reg) & mask) | value, mapped_reg);
break;
}
data = gpio_read_raw_reg(mapped_reg, crp->reg_width);
data &= mask;
data |= value;
if (gpioc->unlock_reg)
gpio_write_raw_reg(pfc_phys_to_virt(gpioc, gpioc->unlock_reg),
32, ~data);
gpio_write_raw_reg(mapped_reg, crp->reg_width, data);
}
static int setup_data_reg(struct pinmux_info *gpioc, unsigned gpio)

2
include/linux/sh_pfc.h
View File

@ -116,6 +116,8 @@ struct pinmux_info {
unsigned int num_resources;
struct pfc_window *window;
unsigned long unlock_reg;
struct gpio_chip chip;
};