Thread (16 messages) 16 messages, 6 authors, 2021-04-02

Re: [PATCH v3 3/3] gpio: xilinx: Utilize generic bitmap_get_value and _set_value

From: Syed Nayyar Waris <hidden>
Date: 2021-04-01 18:55:14
Also in: linux-arch, linux-gpio, linux-pm, lkml

On Mon, Mar 29, 2021 at 8:54 PM Andy Shevchenko
[off-list ref] wrote:
On Sat, Mar 06, 2021 at 07:36:30PM +0530, Syed Nayyar Waris wrote:
quoted
This patch reimplements the xgpio_set_multiple() function in
drivers/gpio/gpio-xilinx.c to use the new generic functions:
bitmap_get_value() and bitmap_set_value(). The code is now simpler
to read and understand. Moreover, instead of looping for each bit
in xgpio_set_multiple() function, now we can check each channel at
a time and save cycles.
...
quoted
+     u32 *const state = chip->gpio_state;
Looking at this... What's the point of the const here?

Am I right that this tells: pointer is a const, while the data underneath
can be modified?
quoted
+     unsigned int *const width = chip->gpio_width;
Ditto.

Putting const:s here and there for sake of the const is not good practice.
It makes code harder to read.

--
With Best Regards,
Andy Shevchenko
Okay. I will incorporate your comments in my next submission. Thank You.

Regards
Syed Nayyar Waris

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