Re: [PATCH V6 02/21] pinctrl: tegra: Add suspend and resume support

Sowjanya Komatineni
2019-07-21T22:47:54Z

On 7/21/19 3:09 PM, Dmitry Osipenko wrote:
> 22.07.2019 1:03, Dmitry Osipenko пишет:
>> 21.07.2019 22:40, Sowjanya Komatineni пишет:
>>> This patch adds support for Tegra pinctrl driver suspend and resume.
>>>
>>> During suspend, context of all pinctrl registers are stored and
>>> on resume they are all restored to have all the pinmux and pad
>>> configuration for normal operation.
>>>
>>> Acked-by: Thierry Reding <treding@nvidia.com>
>>> Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
>>> ---
>>> drivers/pinctrl/tegra/pinctrl-tegra.c | 59 +++++++++++++++++++++++++++++++++++
>>> drivers/pinctrl/tegra/pinctrl-tegra.h | 3 ++
>>> 2 files changed, 62 insertions(+)
>>>
>>> diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.c b/drivers/pinctrl/tegra/pinctrl-tegra.c
>>> index 186ef98e7b2b..e3a237534281 100644
>>> --- a/drivers/pinctrl/tegra/pinctrl-tegra.c
>>> +++ b/drivers/pinctrl/tegra/pinctrl-tegra.c
>>> @@ -631,6 +631,58 @@ static void tegra_pinctrl_clear_parked_bits(struct tegra_pmx *pmx)
>>> }
>>> }
>>>
>>> +static size_t tegra_pinctrl_get_bank_size(struct device *dev,
>>> + unsigned int bank_id)
>>> +{
>>> + struct platform_device *pdev = to_platform_device(dev);
>>> + struct resource *res;
>>> +
>>> + res = platform_get_resource(pdev, IORESOURCE_MEM, bank_id);
>>> +
>>> + return resource_size(res) / 4;
>>> +}
>>> +
>>> +static int tegra_pinctrl_suspend(struct device *dev)
>>> +{
>>> + struct tegra_pmx *pmx = dev_get_drvdata(dev);
>>> + u32 *backup_regs = pmx->backup_regs;
>>> + u32 *regs;
>>> + size_t bank_size;
>>> + unsigned int i, k;
>>> +
>>> + for (i = 0; i < pmx->nbanks; i++) {
>>> + bank_size = tegra_pinctrl_get_bank_size(dev, i);
>>> + regs = pmx->regs[i];
>>> + for (k = 0; k < bank_size; k++)
>>> + *backup_regs++ = readl_relaxed(regs++);
>>> + }
>>> +
>>> + return pinctrl_force_sleep(pmx->pctl);
>>> +}
>>> +
>>> +static int tegra_pinctrl_resume(struct device *dev)
>>> +{
>>> + struct tegra_pmx *pmx = dev_get_drvdata(dev);
>>> + u32 *backup_regs = pmx->backup_regs;
>>> + u32 *regs;
>>> + size_t bank_size;
>>> + unsigned int i, k;
>>> +
>>> + for (i = 0; i < pmx->nbanks; i++) {
>>> + bank_size = tegra_pinctrl_get_bank_size(dev, i);
>>> + regs = pmx->regs[i];
>>> + for (k = 0; k < bank_size; k++)
>>> + writel_relaxed(*backup_regs++, regs++);
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +const struct dev_pm_ops tegra_pinctrl_pm = {
>>> + .suspend = &tegra_pinctrl_suspend,
>>> + .resume = &tegra_pinctrl_resume
>>> +};
>>> +
>>> static bool gpio_node_has_range(const char *compatible)
>>> {
>>> struct device_node *np;
>>> @@ -655,6 +707,7 @@ int tegra_pinctrl_probe(struct platform_device *pdev,
>>> int i;
>>> const char **group_pins;
>>> int fn, gn, gfn;
>>> + unsigned long backup_regs_size = 0;
>>>
>>> pmx = devm_kzalloc(&pdev->dev, sizeof(*pmx), GFP_KERNEL);
>>> if (!pmx)
>>> @@ -707,6 +760,7 @@ int tegra_pinctrl_probe(struct platform_device *pdev,
>>> res = platform_get_resource(pdev, IORESOURCE_MEM, i);
>>> if (!res)
>>> break;
>>> + backup_regs_size += resource_size(res);
>>> }
>>> pmx->nbanks = i;
>>>
>>> @@ -715,6 +769,11 @@ int tegra_pinctrl_probe(struct platform_device *pdev,
>>> if (!pmx->regs)
>>> return -ENOMEM;
>>>
>>> + pmx->backup_regs = devm_kzalloc(&pdev->dev, backup_regs_size,
>>> + GFP_KERNEL);
>>> + if (!pmx->backup_regs)
>>> + return -ENOMEM;
>>> +
>>> for (i = 0; i < pmx->nbanks; i++) {
>>> res = platform_get_resource(pdev, IORESOURCE_MEM, i);
>>> pmx->regs[i] = devm_ioremap_resource(&pdev->dev, res);
>>> diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.h b/drivers/pinctrl/tegra/pinctrl-tegra.h
>>> index 105309774079..0fc82eea9cf1 100644
>>> --- a/drivers/pinctrl/tegra/pinctrl-tegra.h
>>> +++ b/drivers/pinctrl/tegra/pinctrl-tegra.h
>>> @@ -17,6 +17,7 @@ struct tegra_pmx {
>>>
>>> int nbanks;
>>> void __iomem **regs;
>>> + u32 *backup_regs;
>>> };
>>>
>>> enum tegra_pinconf_param {
>>> @@ -193,6 +194,8 @@ struct tegra_pinctrl_soc_data {
>>> bool drvtype_in_mux;
>>> };
>>>
>>> +extern const struct dev_pm_ops tegra_pinctrl_pm;
>>> +
>>> int tegra_pinctrl_probe(struct platform_device *pdev,
>>> const struct tegra_pinctrl_soc_data *soc_data);
>>> #endif
>>>
>> Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
>>
> BTW, you should remove Thierry's ACK from all patches that were modified
> if he didn't re-ACK the new version.
>
> Also, it looks to me that you're manually adding versioning to the
> patches because git usually uses lowercase for 'v'. You could use "git
> format-patch -v6 ..".

ok, Reg. version I am using git format-patch --subject-prefix='PATCH V6'

will change to lower case v