diff options
| author | Tony Lindgren <tony@atomide.com> | 2021-04-17 11:38:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-28 13:19:14 +0200 |
| commit | dbb355960ef9c12caac7a0694cc4376a4f3314fd (patch) | |
| tree | c6d29f6da36242d3bef19b9d4ed00ee33be88dec /drivers/gpio | |
| parent | 835c8d688e1e84b00204d2a142a33b3b0dda962e (diff) | |
gpio: omap: Save and restore sysconfig
[ Upstream commit ddd8d94ca31e768c76cf8bfe34ba7b10136b3694 ]
As we are using cpu_pm to save and restore context, we must also save and
restore the GPIO sysconfig register. This is needed because we are not
calling PM runtime functions at all with cpu_pm.
We need to save the sysconfig on idle as it's value can get reconfigured by
PM runtime and can be different from the init time value. Device specific
flags like "ti,no-idle-on-init" can affect the init value.
Fixes: b764a5863fd8 ("gpio: omap: Remove custom PM calls and use cpu_pm instead")
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Adam Ford <aford173@gmail.com>
Cc: Andreas Kemnade <andreas@kemnade.info>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-omap.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index d0f27084a942..ce6954390cfd 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -29,6 +29,7 @@ #define OMAP4_GPIO_DEBOUNCINGTIME_MASK 0xFF struct gpio_regs { + u32 sysconfig; u32 irqenable1; u32 irqenable2; u32 wake_en; @@ -1058,6 +1059,7 @@ static void omap_gpio_init_context(struct gpio_bank *p) const struct omap_gpio_reg_offs *regs = p->regs; void __iomem *base = p->base; + p->context.sysconfig = readl_relaxed(base + regs->sysconfig); p->context.ctrl = readl_relaxed(base + regs->ctrl); p->context.oe = readl_relaxed(base + regs->direction); p->context.wake_en = readl_relaxed(base + regs->wkup_en); @@ -1077,6 +1079,7 @@ static void omap_gpio_restore_context(struct gpio_bank *bank) const struct omap_gpio_reg_offs *regs = bank->regs; void __iomem *base = bank->base; + writel_relaxed(bank->context.sysconfig, base + regs->sysconfig); writel_relaxed(bank->context.wake_en, base + regs->wkup_en); writel_relaxed(bank->context.ctrl, base + regs->ctrl); writel_relaxed(bank->context.leveldetect0, base + regs->leveldetect0); @@ -1104,6 +1107,10 @@ static void omap_gpio_idle(struct gpio_bank *bank, bool may_lose_context) bank->saved_datain = readl_relaxed(base + bank->regs->datain); + /* Save syconfig, it's runtime value can be different from init value */ + if (bank->loses_context) + bank->context.sysconfig = readl_relaxed(base + bank->regs->sysconfig); + if (!bank->enabled_non_wakeup_gpios) goto update_gpio_context_count; @@ -1259,6 +1266,7 @@ static int gpio_omap_cpu_notifier(struct notifier_block *nb, static const struct omap_gpio_reg_offs omap2_gpio_regs = { .revision = OMAP24XX_GPIO_REVISION, + .sysconfig = OMAP24XX_GPIO_SYSCONFIG, .direction = OMAP24XX_GPIO_OE, .datain = OMAP24XX_GPIO_DATAIN, .dataout = OMAP24XX_GPIO_DATAOUT, @@ -1282,6 +1290,7 @@ static const struct omap_gpio_reg_offs omap2_gpio_regs = { static const struct omap_gpio_reg_offs omap4_gpio_regs = { .revision = OMAP4_GPIO_REVISION, + .sysconfig = OMAP4_GPIO_SYSCONFIG, .direction = OMAP4_GPIO_OE, .datain = OMAP4_GPIO_DATAIN, .dataout = OMAP4_GPIO_DATAOUT, |