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

Dmitry Osipenko
2019-07-21T22:09:15Z

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 ..".