[0/2] Add pinctrl driver support for Amlogic C3 SoCs

This patch adds pinctrl driver support for Amloigc C3 SoC (C308L and C302X)

Huqiang Qin (2):
  dt-bindings: gpio: Add a header file for Amlogic C3 SoCs
  pinctrl: Add driver support for Amlogic C3 SoCs

 .../pinctrl/amlogic,meson-pinctrl-a1.yaml     |    1 +
 drivers/pinctrl/meson/Kconfig                 |    6 +
 drivers/pinctrl/meson/Makefile                |    1 +
 drivers/pinctrl/meson/pinctrl-amlogic-c3.c    | 1110 +++++++++++++++++
 include/dt-bindings/gpio/amlogic-c3-gpio.h    |   72 ++
 5 files changed, 1190 insertions(+)
 create mode 100644 drivers/pinctrl/meson/pinctrl-amlogic-c3.c
 create mode 100644 include/dt-bindings/gpio/amlogic-c3-gpio.h

Hi Andy Shevchenko,


On 2023/7/6 20:29, Andy Shevchenko wrote:
> 
> On Thu, Jul 06, 2023 at 07:45:22PM +0800, Huqiang Qin wrote:
>> Add new pinctrl driver for Amlogic C3 SoCs which share the
> 
> a new

Okay

> 
>> same register layout as the previous Amloigc S4
> 
> Missing period at the end.

Okay

> 
> ...
> 
>> +config PINCTRL_AMLOGIC_C3
>> +     tristate "Amlogic C3 SoC pinctrl driver"
>> +     depends on ARM64
>> +     select PINCTRL_MESON_AXG_PMX
>> +     default y
> 
> This default seems a bad cargo cult. Why ARM64 kernel should have all them be
> opt-out, instead of opt-in? Shouldn't this be a distro problem?

The Kconfig structure is as follows:

menuconfig PINCTRL_MESON
	tristate "Amlogic SoC pinctrl drivers"
	depends on ARCH_MESON || COMPILE_TEST
	...

if PINCTRL_MESON
...
config PINCTRL_AMLOGIC_C3
	tristate "Amlogic C3 SoC pinctrl driver"
	depends on ARM64
	select PINCTRL_MESON_AXG_PMX
	default y

endif

When ARCH_MESON is not selected, all pinctrl drivers of Amlogic will not be compiled by default

> 
> ...
> 
>> +     MESON_PIN(GPIO_TEST_N)
> 
> Is it real one?

Yes, it's real GPIO and supports interrupts, similar to Amlogic S4 SoC

> 
>> +};
> 
> ...
> 
>> +     /* Bank A func6 */
>> +     GROUP(spi_a_mosi_a,             6),
>> +     GROUP(gen_clk_a4,               6),
>> +     GROUP(clk12_24_a,               6)
> 
> Leave trailing comma here as it's not a terminator.

Okay

> 
> ...
> 
>> +static const char * const i2c2_groups[] = {
>> +     "i2c2_sda", "i2c2_scl"
> 
> Ditto.

Okay

> 
>> +};
>> +
>> +static const char * const i2c3_groups[] = {
>> +     "i2c3_sda_c", "i2c3_scl_c",
>> +     "i2c3_sda_x", "i2c3_scl_x",
>> +     "i2c3_sda_d", "i2c3_scl_d"
> 
> Ditto.

Okay

> 
>> +};
> 
> ...
> 
>> +#ifdef CONFIG_OF
> 
> Drop this ugly ifdeffery.

Okay

> 
>> +static const struct of_device_id c3_pinctrl_dt_match[] = {
>> +     {
>> +             .compatible = "amlogic,c3-periphs-pinctrl",
>> +             .data = &c3_periphs_pinctrl_data,
>> +     },
>> +     { },
> 
> No comma for the terminator.

Okay

> 
>> +};
>> +MODULE_DEVICE_TABLE(of, c3_pinctrl_dt_match);
>> +#endif /* CONFIG_OF */
>> +
>> +static struct platform_driver c3_pinctrl_driver = {
>> +     .probe  = meson_pinctrl_probe,
>> +     .driver = {
>> +             .name = "amlogic-c3-pinctrl",
> 
>> +             .of_match_table = of_match_ptr(c3_pinctrl_dt_match),
> 
> Drop the rather problematic of_match_ptr().

Okay

> 
>> +     },
>> +};
> 
> --
> With Best Regards,
> Andy Shevchenko
> 
> 
> 


Best Regards,
Huqiang Qin