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Message-ID: <50b7293c-8c4d-0162-2810-a74d59e7d03e@linux.alibaba.com>
Date: Tue, 12 Sep 2023 16:28:35 +0800
From: Baolin Wang <baolin.wang@...ux.alibaba.com>
To: Linhua Xu <Linhua.xu@...soc.com>,
Linus Walleij <linus.walleij@...aro.org>
Cc: Orson Zhai <orsonzhai@...il.com>,
Chunyan Zhang <zhang.lyra@...il.com>,
linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
lh xu <xulh0829@...il.com>,
Zhirong Qiu <zhirong.qiu@...soc.com>,
Xiongpeng Wu <xiongpeng.wu@...soc.com>
Subject: Re: [PATCH V2 2/6] pinctrl: sprd: Fix the incorrect mask and shift
definition
On 9/8/2023 1:51 PM, Linhua Xu wrote:
> From: Linhua Xu <Linhua.Xu@...soc.com>
>
> Pull-up and pull-down are mutually exclusive. When setting one of them,
> the bit of the other needs to be clear. Now, there are cases where pull-up
> and pull-down are set at the same time in the code, thus fix them.
>
> Signed-off-by: Linhua Xu <Linhua.Xu@...soc.com>
> ---
> drivers/pinctrl/sprd/pinctrl-sprd.c | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/pinctrl/sprd/pinctrl-sprd.c b/drivers/pinctrl/sprd/pinctrl-sprd.c
> index 25fb9ce9ad78..5b9126b2cde2 100644
> --- a/drivers/pinctrl/sprd/pinctrl-sprd.c
> +++ b/drivers/pinctrl/sprd/pinctrl-sprd.c
> @@ -58,21 +58,21 @@
> #define DRIVE_STRENGTH_SHIFT 19
>
> #define SLEEP_PULL_DOWN BIT(2)
> -#define SLEEP_PULL_DOWN_MASK 0x1
> +#define SLEEP_PULL_DOWN_MASK GENMASK(1, 0)
> #define SLEEP_PULL_DOWN_SHIFT 2
>
> #define PULL_DOWN BIT(6)
> -#define PULL_DOWN_MASK 0x1
> +#define PULL_DOWN_MASK (GENMASK(1, 0) | BIT(6))
> #define PULL_DOWN_SHIFT 6
>
> #define SLEEP_PULL_UP BIT(3)
> -#define SLEEP_PULL_UP_MASK 0x1
> -#define SLEEP_PULL_UP_SHIFT 3
> +#define SLEEP_PULL_UP_MASK GENMASK(1, 0)
> +#define SLEEP_PULL_UP_SHIFT 2
>
> #define PULL_UP_4_7K (BIT(12) | BIT(7))
> #define PULL_UP_20K BIT(7)
> -#define PULL_UP_MASK 0x21
> -#define PULL_UP_SHIFT 7
> +#define PULL_UP_MASK (GENMASK(1, 0) | BIT(6))
> +#define PULL_UP_SHIFT 6
This change looks weird, BIT(6) is for PULL_DOWN. So I am curious these
changes are backward compatibility?
Now I can not access the SPRD Spec, Chunyan, can you help to confirm
these changes? Thanks.
>
> #define INPUT_SCHMITT BIT(11)
> #define INPUT_SCHMITT_MASK 0x1
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