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SubjectRe: [PATCH V3 02/17] pinctrl: tegra: add suspend and resume support
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18.06.2019 12:22, Dmitry Osipenko пишет:
> 18.06.2019 10:46, Sowjanya Komatineni пишет:
>> This patch adds suspend and resume support for Tegra pinctrl driver
>> and registers them to syscore so the pinmux settings are restored
>> before the devices resume.
>>
>> Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
>> ---
>> drivers/pinctrl/tegra/pinctrl-tegra.c | 62 ++++++++++++++++++++++++++++++++
>> drivers/pinctrl/tegra/pinctrl-tegra.h | 5 +++
>> drivers/pinctrl/tegra/pinctrl-tegra114.c | 1 +
>> drivers/pinctrl/tegra/pinctrl-tegra124.c | 1 +
>> drivers/pinctrl/tegra/pinctrl-tegra20.c | 1 +
>> drivers/pinctrl/tegra/pinctrl-tegra210.c | 13 +++++++
>> drivers/pinctrl/tegra/pinctrl-tegra30.c | 1 +
>> 7 files changed, 84 insertions(+)
>>
>> diff --git a/drivers/pinctrl/tegra/pinctrl-tegra.c b/drivers/pinctrl/tegra/pinctrl-tegra.c
>> index 34596b246578..ceced30d8bd1 100644
>> --- a/drivers/pinctrl/tegra/pinctrl-tegra.c
>> +++ b/drivers/pinctrl/tegra/pinctrl-tegra.c
>> @@ -20,11 +20,16 @@
>> #include <linux/pinctrl/pinmux.h>
>> #include <linux/pinctrl/pinconf.h>
>> #include <linux/slab.h>
>> +#include <linux/syscore_ops.h>
>>
>> #include "../core.h"
>> #include "../pinctrl-utils.h"
>> #include "pinctrl-tegra.h"
>>
>> +#define EMMC2_PAD_CFGPADCTRL_0 0x1c8
>> +#define EMMC4_PAD_CFGPADCTRL_0 0x1e0
>> +#define EMMC_DPD_PARKING (0x1fff << 14)
>> +
>> static inline u32 pmx_readl(struct tegra_pmx *pmx, u32 bank, u32 reg)
>> {
>> return readl(pmx->regs[bank] + reg);
>> @@ -619,6 +624,48 @@ static void tegra_pinctrl_clear_parked_bits(struct tegra_pmx *pmx)
>> pmx_writel(pmx, val, g->mux_bank, g->mux_reg);
>> }
>> }
>> +
>> + if (pmx->soc->has_park_padcfg) {
>> + val = pmx_readl(pmx, 0, EMMC2_PAD_CFGPADCTRL_0);
>> + val &= ~EMMC_DPD_PARKING;
>> + pmx_writel(pmx, val, 0, EMMC2_PAD_CFGPADCTRL_0);
>> +
>> + val = pmx_readl(pmx, 0, EMMC4_PAD_CFGPADCTRL_0);
>> + val &= ~EMMC_DPD_PARKING;
>> + pmx_writel(pmx, val, 0, EMMC4_PAD_CFGPADCTRL_0);
>> + }
>> +}
>
> Is there any reason why parked_bit can't be changed to parked_bitmask like I was
> asking in a comment to v2?
>
> I suppose that it's more preferable to keep pinctrl-tegra.c platform-agnostic for
> consistency when possible, hence adding platform specifics here should be discouraged.
> And then the parked_bitmask will also result in a proper hardware description in the code.
>

I'm now also vaguely recalling that Stephen Warren had some kind of a "code generator"
for the pinctrl drivers. So I guess all those tables were auto-generated initially.

Stephen, maybe you could adjust the generator to take into account the bitmask (of
course if that's a part of the generated code) and then re-gen it all for Sowjanya?

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