From: Thierry Reding <thierry.reding@gmail.com>
To: Sowjanya Komatineni <skomatineni@nvidia.com>
Cc: jonathanh@nvidia.com, tglx@linutronix.de, jason@lakedaemon.net,
marc.zyngier@arm.com, linus.walleij@linaro.org, stefan@agner.ch,
mark.rutland@arm.com, pdeschrijver@nvidia.com,
pgaikwad@nvidia.com, sboyd@kernel.org, linux-clk@vger.kernel.org,
linux-gpio@vger.kernel.org, jckuo@nvidia.com, josephl@nvidia.com,
talho@nvidia.com, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org, mperttunen@nvidia.com,
spatra@nvidia.com, robh+dt@kernel.org, digetx@gmail.com,
devicetree@vger.kernel.org
Subject: Re: [PATCH V3 03/17] gpio: tegra: use resume_noirq for tegra gpio resume
Date: Tue, 18 Jun 2019 13:39:46 +0200 [thread overview]
Message-ID: <20190618113946.GF28892@ulmo> (raw)
In-Reply-To: <1560843991-24123-4-git-send-email-skomatineni@nvidia.com>
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On Tue, Jun 18, 2019 at 12:46:17AM -0700, Sowjanya Komatineni wrote:
> During SC7 resume, PARKED bit clear from the pinmux registers may
> cause a glitch on the GPIO lines.
>
> So, Tegra GPIOs restore should happen prior to restoring Tegra pinmux
> to keep the GPIO lines in a known good state prior to clearing PARKED
> bit.
>
> This patch has fix for this by moving Tegra GPIO restore to happen
> during resume_noirq.
>
> Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
> ---
> drivers/gpio/gpio-tegra.c | 17 +++++++++++------
> 1 file changed, 11 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c
> index f57bfc07ae22..f3c58c597ab9 100644
> --- a/drivers/gpio/gpio-tegra.c
> +++ b/drivers/gpio/gpio-tegra.c
> @@ -410,7 +410,7 @@ static void tegra_gpio_irq_handler(struct irq_desc *desc)
> }
>
> #ifdef CONFIG_PM_SLEEP
> -static int tegra_gpio_resume(struct device *dev)
> +static int tegra_gpio_resume_noirq(struct device *dev)
> {
> struct tegra_gpio_info *tgi = dev_get_drvdata(dev);
> unsigned long flags;
> @@ -506,6 +506,15 @@ static int tegra_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
>
> return irq_set_irq_wake(bank->irq, enable);
> }
> +
> +static const struct dev_pm_ops tegra_gpio_pm_ops = {
> + .suspend = &tegra_gpio_suspend,
> + .resume_noirq = &tegra_gpio_resume_noirq
> +};
> +
> +#define TEGRA_GPIO_PM (&tegra_gpio_pm_ops)
> +#else
> +#define TEGRA_GPIO_PM NULL
This seems completely unnecessary...
> #endif
>
> #ifdef CONFIG_DEBUG_FS
> @@ -553,10 +562,6 @@ static inline void tegra_gpio_debuginit(struct tegra_gpio_info *tgi)
>
> #endif
>
> -static const struct dev_pm_ops tegra_gpio_pm_ops = {
> - SET_SYSTEM_SLEEP_PM_OPS(tegra_gpio_suspend, tegra_gpio_resume)
> -};
> -
... because this should work correctly irrespective of how PM_SLEEP is
configured. So I think you just need to:
s/tegra_gpio_resume/tegra_gpio_resume_noirq/
in the above to make this work. No need for this preprocessor macro
business.
Thierry
> static int tegra_gpio_probe(struct platform_device *pdev)
> {
> struct tegra_gpio_info *tgi;
> @@ -706,7 +711,7 @@ static const struct of_device_id tegra_gpio_of_match[] = {
> static struct platform_driver tegra_gpio_driver = {
> .driver = {
> .name = "tegra-gpio",
> - .pm = &tegra_gpio_pm_ops,
> + .pm = TEGRA_GPIO_PM,
> .of_match_table = tegra_gpio_of_match,
> },
> .probe = tegra_gpio_probe,
> --
> 2.7.4
>
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next prev parent reply other threads:[~2019-06-18 11:39 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-18 7:46 [PATCH V3 00/17] SC7 entry and exit support for Tegra210 Sowjanya Komatineni
2019-06-18 7:46 ` [PATCH V3 01/17] irqchip: tegra: do not disable COP IRQ during suspend Sowjanya Komatineni
2019-06-18 9:19 ` Marc Zyngier
2019-06-18 10:58 ` Thierry Reding
2019-06-18 7:46 ` [PATCH V3 02/17] pinctrl: tegra: add suspend and resume support Sowjanya Komatineni
2019-06-18 9:22 ` Dmitry Osipenko
2019-06-18 9:30 ` Dmitry Osipenko
2019-06-18 15:41 ` Stephen Warren
2019-06-18 16:50 ` Sowjanya Komatineni
2019-06-18 17:34 ` Sowjanya Komatineni
2019-06-18 20:00 ` Dmitry Osipenko
2019-06-18 20:04 ` Sowjanya Komatineni
2019-06-19 8:31 ` Thierry Reding
2019-06-19 8:40 ` Dmitry Osipenko
2019-06-19 8:33 ` Thierry Reding
2019-06-19 8:57 ` Thierry Reding
2019-06-18 11:31 ` Thierry Reding
2019-06-18 7:46 ` [PATCH V3 03/17] gpio: tegra: use resume_noirq for tegra gpio resume Sowjanya Komatineni
2019-06-18 11:39 ` Thierry Reding [this message]
2019-06-18 7:46 ` [PATCH V3 04/17] clk: tegra: save and restore divider rate Sowjanya Komatineni
2019-06-18 11:40 ` Thierry Reding
2019-06-18 7:46 ` [PATCH V3 05/17] clk: tegra: pllout: save and restore pllout context Sowjanya Komatineni
2019-06-18 11:41 ` Thierry Reding
2019-06-18 7:46 ` [PATCH V3 06/17] clk: tegra: pll: save and restore pll context Sowjanya Komatineni
2019-06-18 11:45 ` Thierry Reding
2019-06-25 20:46 ` Stephen Boyd
2019-06-25 21:22 ` Sowjanya Komatineni
2019-06-18 7:46 ` [PATCH V3 07/17] clk: tegra: save and restore CPU and System clocks context Sowjanya Komatineni
2019-06-18 11:48 ` Thierry Reding
2019-06-18 7:46 ` [PATCH V3 08/17] clk: tegra: add support for peripheral clock suspend and resume Sowjanya Komatineni
2019-06-18 11:50 ` Thierry Reding
2019-06-18 7:46 ` [PATCH V3 09/17] clk: tegra: support for saving and restoring OSC clock context Sowjanya Komatineni
2019-06-18 11:51 ` Thierry Reding
2019-06-18 7:46 ` [PATCH V3 10/17] clk: tegra: add suspend resume support for DFLL Sowjanya Komatineni
2019-06-18 11:59 ` Thierry Reding
2019-06-18 7:46 ` [PATCH V3 11/17] clk: tegra210: support for Tegra210 clocks suspend and resume Sowjanya Komatineni
2019-06-18 12:16 ` Thierry Reding
2019-06-18 17:58 ` Sowjanya Komatineni
2019-06-19 8:15 ` Thierry Reding
2019-06-21 20:44 ` Sowjanya Komatineni
2019-06-18 7:46 ` [PATCH V3 12/17] soc/tegra: pmc: allow support for more tegra wake Sowjanya Komatineni
2019-06-18 9:26 ` Marc Zyngier
2019-06-18 7:46 ` [PATCH V3 13/17] soc/tegra: pmc: add pmc wake support for tegra210 Sowjanya Komatineni
2019-06-18 7:46 ` [PATCH V3 14/17] arm64: tegra: enable wake from deep sleep on RTC alarm Sowjanya Komatineni
2019-06-18 7:46 ` [PATCH V3 15/17] soc/tegra: pmc: configure core power request polarity Sowjanya Komatineni
2019-06-18 7:46 ` [PATCH V3 16/17] soc/tegra: pmc: configure deep sleep control settings Sowjanya Komatineni
2019-06-18 7:46 ` [PATCH V3 17/17] arm64: dts: tegra210-p2180: Jetson TX1 SC7 timings Sowjanya Komatineni
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