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pinctrl: sirf: save the status in suspend and restore after resuming 

this patch saves the status of pinctrl registers and restore them while
resuming. this makes all drivers have coherent status for pinmux after
suspending and resuming.

Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Barry Song 2013-05-16 11:17:09 +08:00 committed by Linus Walleij
parent 44d5f7bbea
commit bc8d25a405
1 changed files with 56 additions and 0 deletions
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56
drivers/pinctrl/sirf/pinctrl-sirf.c
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@ -390,11 +390,67 @@ out_no_rsc_remap:
return ret;
}
#ifdef CONFIG_PM_SLEEP
static int sirfsoc_pinmux_suspend_noirq(struct device *dev)
{
int i, j;
struct sirfsoc_pmx *spmx = dev_get_drvdata(dev);
for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) {
for (j = 0; j < SIRFSOC_GPIO_BANK_SIZE; j++) {
spmx->gpio_regs[i][j] = readl(spmx->gpio_virtbase +
SIRFSOC_GPIO_CTRL(i, j));
}
spmx->ints_regs[i] = readl(spmx->gpio_virtbase +
SIRFSOC_GPIO_INT_STATUS(i));
spmx->paden_regs[i] = readl(spmx->gpio_virtbase +
SIRFSOC_GPIO_PAD_EN(i));
}
spmx->dspen_regs = readl(spmx->gpio_virtbase + SIRFSOC_GPIO_DSP_EN0);
for (i = 0; i < 3; i++)
spmx->rsc_regs[i] = readl(spmx->rsc_virtbase + 4 * i);
return 0;
}
static int sirfsoc_pinmux_resume_noirq(struct device *dev)
{
int i, j;
struct sirfsoc_pmx *spmx = dev_get_drvdata(dev);
for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) {
for (j = 0; j < SIRFSOC_GPIO_BANK_SIZE; j++) {
writel(spmx->gpio_regs[i][j], spmx->gpio_virtbase +
SIRFSOC_GPIO_CTRL(i, j));
}
writel(spmx->ints_regs[i], spmx->gpio_virtbase +
SIRFSOC_GPIO_INT_STATUS(i));
writel(spmx->paden_regs[i], spmx->gpio_virtbase +
SIRFSOC_GPIO_PAD_EN(i));
}
writel(spmx->dspen_regs, spmx->gpio_virtbase + SIRFSOC_GPIO_DSP_EN0);
for (i = 0; i < 3; i++)
writel(spmx->rsc_regs[i], spmx->rsc_virtbase + 4 * i);
return 0;
}
static const struct dev_pm_ops sirfsoc_pinmux_pm_ops = {
.suspend_noirq = sirfsoc_pinmux_suspend_noirq,
.resume_noirq = sirfsoc_pinmux_resume_noirq,
};
#endif
static struct platform_driver sirfsoc_pinmux_driver = {
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
.of_match_table = pinmux_ids,
#ifdef CONFIG_PM_SLEEP
.pm = &sirfsoc_pinmux_pm_ops,
#endif
},
.probe = sirfsoc_pinmux_probe,
};