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

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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 @@ static int sirfsoc_pinmux_probe(struct platform_device *pdev)
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,
};