Re: [PATCH 1/2] pinctrl: meson: separate soc drivers

[Neil Armstrong <narmstrong@xxxxxxxxxxxx>]

On 09/10/2017 12:17, Jerome Brunet wrote:
> When meson pinctrl is enabled, all meson platforms pinctrl drivers are
> built in the kernel, with a significant amount of data.
> 
> This leads to situation where pinctrl drivers targeting an architecture
> are also compiled and shipped on another one (ex: meson8 - ARM - compiled
> and shipped on ARM64 builds). This is a waste of memory we can easily
> avoid.
> 
> This change makes 4 pinctrl drivers (1 per SoC) out the original single
> driver, allowing to compile and ship only the ones required.
> 
> Signed-off-by: Jerome Brunet <jbrunet@xxxxxxxxxxxx>
> ---
>  drivers/pinctrl/Kconfig                    | 11 +------
>  drivers/pinctrl/meson/Kconfig              | 36 +++++++++++++++++++++
>  drivers/pinctrl/meson/Makefile             |  8 +++--
>  drivers/pinctrl/meson/pinctrl-meson-gxbb.c | 25 +++++++++++++--
>  drivers/pinctrl/meson/pinctrl-meson-gxl.c  | 25 +++++++++++++--
>  drivers/pinctrl/meson/pinctrl-meson.c      | 51 ++----------------------------
>  drivers/pinctrl/meson/pinctrl-meson.h      | 11 ++-----
>  drivers/pinctrl/meson/pinctrl-meson8.c     | 25 +++++++++++++--
>  drivers/pinctrl/meson/pinctrl-meson8b.c    | 25 +++++++++++++--
>  9 files changed, 140 insertions(+), 77 deletions(-)
>  create mode 100644 drivers/pinctrl/meson/Kconfig
> 
> diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
> index 1778cf4f81c7..15b5b3b76ba9 100644
> --- a/drivers/pinctrl/Kconfig
> +++ b/drivers/pinctrl/Kconfig
> @@ -167,16 +167,6 @@ config PINCTRL_MCP23S08
>  	  This provides a GPIO interface supporting inputs and outputs.
>  	  The I2C versions of the chips can be used as interrupt-controller.
>  
> -config PINCTRL_MESON
> -	bool
> -	depends on OF
> -	select PINMUX
> -	select PINCONF
> -	select GENERIC_PINCONF
> -	select GPIOLIB
> -	select OF_GPIO
> -	select REGMAP_MMIO
> -
>  config PINCTRL_OXNAS
>  	bool
>  	depends on OF
> @@ -368,6 +358,7 @@ source "drivers/pinctrl/uniphier/Kconfig"
>  source "drivers/pinctrl/vt8500/Kconfig"
>  source "drivers/pinctrl/mediatek/Kconfig"
>  source "drivers/pinctrl/zte/Kconfig"
> +source "drivers/pinctrl/meson/Kconfig"
>  
>  config PINCTRL_XWAY
>  	bool
> diff --git a/drivers/pinctrl/meson/Kconfig b/drivers/pinctrl/meson/Kconfig
> new file mode 100644
> index 000000000000..15655bfd39b6
> --- /dev/null
> +++ b/drivers/pinctrl/meson/Kconfig
> @@ -0,0 +1,36 @@
> +menuconfig PINCTRL_MESON
> +	bool "Amlogic SoC pinctrl drivers"
> +	depends on ARCH_MESON || COMPILE_TEST
> +	depends on OF
> +	select PINMUX
> +	select PINCONF
> +	select GENERIC_PINCONF
> +	select GPIOLIB
> +	select OF_GPIO
> +	select REGMAP_MMIO
> +	select PINMUX
> +	select GENERIC_PINCONF
> +
> +if PINCTRL_MESON
> +
> +config PINCTRL_MESON8
> +	bool "Meson 8 SoC pinctrl driver"
> +	depends on ARM
> +	default y
> +
> +config PINCTRL_MESON8B
> +	bool "Meson 8b SoC pinctrl driver"
> +	depends on ARM
> +	default y
> +
> +config PINCTRL_MESON_GXBB
> +	bool "Meson gxbb SoC pinctrl driver"
> +	depends on ARM64
> +	default y
> +
> +config PINCTRL_MESON_GXL
> +	bool "Meson gxl SoC pinctrl driver"
> +	depends on ARM64
> +	default y
> +
> +endif
> diff --git a/drivers/pinctrl/meson/Makefile b/drivers/pinctrl/meson/Makefile
> index 27c5b5126008..a6ef5ff4e9b1 100644
> --- a/drivers/pinctrl/meson/Makefile
> +++ b/drivers/pinctrl/meson/Makefile
> @@ -1,3 +1,5 @@
> -obj-y	+= pinctrl-meson8.o pinctrl-meson8b.o
> -obj-y	+= pinctrl-meson-gxbb.o pinctrl-meson-gxl.o
> -obj-y	+= pinctrl-meson.o
> +obj-y += pinctrl-meson.o
> +obj-$(CONFIG_PINCTRL_MESON8) += pinctrl-meson8.o
> +obj-$(CONFIG_PINCTRL_MESON8B) += pinctrl-meson8b.o
> +obj-$(CONFIG_PINCTRL_MESON_GXBB) += pinctrl-meson-gxbb.o
> +obj-$(CONFIG_PINCTRL_MESON_GXL) += pinctrl-meson-gxl.o
> diff --git a/drivers/pinctrl/meson/pinctrl-meson-gxbb.c b/drivers/pinctrl/meson/pinctrl-meson-gxbb.c
> index 1881d4a0eca2..a87bdb17414b 100644
> --- a/drivers/pinctrl/meson/pinctrl-meson-gxbb.c
> +++ b/drivers/pinctrl/meson/pinctrl-meson-gxbb.c
> @@ -824,7 +824,7 @@ static struct meson_bank meson_gxbb_aobus_banks[] = {
>  	BANK("AO",   GPIOAO_0,  GPIOAO_13, 0, 13, 0,  0,  0, 16,  0,  0,  0, 16,  1,  0),
>  };
>  
> -struct meson_pinctrl_data meson_gxbb_periphs_pinctrl_data = {
> +static struct meson_pinctrl_data meson_gxbb_periphs_pinctrl_data = {
>  	.name		= "periphs-banks",
>  	.pins		= meson_gxbb_periphs_pins,
>  	.groups		= meson_gxbb_periphs_groups,
> @@ -836,7 +836,7 @@ struct meson_pinctrl_data meson_gxbb_periphs_pinctrl_data = {
>  	.num_banks	= ARRAY_SIZE(meson_gxbb_periphs_banks),
>  };
>  
> -struct meson_pinctrl_data meson_gxbb_aobus_pinctrl_data = {
> +static struct meson_pinctrl_data meson_gxbb_aobus_pinctrl_data = {
>  	.name		= "aobus-banks",
>  	.pins		= meson_gxbb_aobus_pins,
>  	.groups		= meson_gxbb_aobus_groups,
> @@ -847,3 +847,24 @@ struct meson_pinctrl_data meson_gxbb_aobus_pinctrl_data = {
>  	.num_funcs	= ARRAY_SIZE(meson_gxbb_aobus_functions),
>  	.num_banks	= ARRAY_SIZE(meson_gxbb_aobus_banks),
>  };
> +
> +static const struct of_device_id meson_gxbb_pinctrl_dt_match[] = {
> +	{
> +		.compatible = "amlogic,meson-gxbb-periphs-pinctrl",
> +		.data = &meson_gxbb_periphs_pinctrl_data,
> +	},
> +	{
> +		.compatible = "amlogic,meson-gxbb-aobus-pinctrl",
> +		.data = &meson_gxbb_aobus_pinctrl_data,
> +	},
> +	{ },
> +};
> +
> +static struct platform_driver meson_gxbb_pinctrl_driver = {
> +	.probe		= meson_pinctrl_probe,
> +	.driver = {
> +		.name	= "meson-gxbb-pinctrl",
> +		.of_match_table = meson_gxbb_pinctrl_dt_match,
> +	},
> +};
> +builtin_platform_driver(meson_gxbb_pinctrl_driver);
> diff --git a/drivers/pinctrl/meson/pinctrl-meson-gxl.c b/drivers/pinctrl/meson/pinctrl-meson-gxl.c
> index 3a14ecae9f31..088ac94f76b0 100644
> --- a/drivers/pinctrl/meson/pinctrl-meson-gxl.c
> +++ b/drivers/pinctrl/meson/pinctrl-meson-gxl.c
> @@ -809,7 +809,7 @@ static struct meson_bank meson_gxl_aobus_banks[] = {
>  	BANK("AO",   GPIOAO_0,  GPIOAO_9, 0, 9, 0,  0,  0, 16,  0,  0,  0, 16,  1,  0),
>  };
>  
> -struct meson_pinctrl_data meson_gxl_periphs_pinctrl_data = {
> +static struct meson_pinctrl_data meson_gxl_periphs_pinctrl_data = {
>  	.name		= "periphs-banks",
>  	.pins		= meson_gxl_periphs_pins,
>  	.groups		= meson_gxl_periphs_groups,
> @@ -821,7 +821,7 @@ struct meson_pinctrl_data meson_gxl_periphs_pinctrl_data = {
>  	.num_banks	= ARRAY_SIZE(meson_gxl_periphs_banks),
>  };
>  
> -struct meson_pinctrl_data meson_gxl_aobus_pinctrl_data = {
> +static struct meson_pinctrl_data meson_gxl_aobus_pinctrl_data = {
>  	.name		= "aobus-banks",
>  	.pins		= meson_gxl_aobus_pins,
>  	.groups		= meson_gxl_aobus_groups,
> @@ -832,3 +832,24 @@ struct meson_pinctrl_data meson_gxl_aobus_pinctrl_data = {
>  	.num_funcs	= ARRAY_SIZE(meson_gxl_aobus_functions),
>  	.num_banks	= ARRAY_SIZE(meson_gxl_aobus_banks),
>  };
> +
> +static const struct of_device_id meson_gxl_pinctrl_dt_match[] = {
> +	{
> +		.compatible = "amlogic,meson-gxl-periphs-pinctrl",
> +		.data = &meson_gxl_periphs_pinctrl_data,
> +	},
> +	{
> +		.compatible = "amlogic,meson-gxl-aobus-pinctrl",
> +		.data = &meson_gxl_aobus_pinctrl_data,
> +	},
> +	{ },
> +};
> +
> +static struct platform_driver meson_gxl_pinctrl_driver = {
> +	.probe		= meson_pinctrl_probe,
> +	.driver = {
> +		.name	= "meson-gxl-pinctrl",
> +		.of_match_table = meson_gxl_pinctrl_dt_match,
> +	},
> +};
> +builtin_platform_driver(meson_gxl_pinctrl_driver);
> diff --git a/drivers/pinctrl/meson/pinctrl-meson.c b/drivers/pinctrl/meson/pinctrl-meson.c
> index 71bccb7acbf8..8fc1f1b45435 100644
> --- a/drivers/pinctrl/meson/pinctrl-meson.c
> +++ b/drivers/pinctrl/meson/pinctrl-meson.c
> @@ -481,42 +481,6 @@ static int meson_gpio_get(struct gpio_chip *chip, unsigned gpio)
>  	return !!(val & BIT(bit));
>  }
>  
> -static const struct of_device_id meson_pinctrl_dt_match[] = {
> -	{
> -		.compatible = "amlogic,meson8-cbus-pinctrl",
> -		.data = &meson8_cbus_pinctrl_data,
> -	},
> -	{
> -		.compatible = "amlogic,meson8b-cbus-pinctrl",
> -		.data = &meson8b_cbus_pinctrl_data,
> -	},
> -	{
> -		.compatible = "amlogic,meson8-aobus-pinctrl",
> -		.data = &meson8_aobus_pinctrl_data,
> -	},
> -	{
> -		.compatible = "amlogic,meson8b-aobus-pinctrl",
> -		.data = &meson8b_aobus_pinctrl_data,
> -	},
> -	{
> -		.compatible = "amlogic,meson-gxbb-periphs-pinctrl",
> -		.data = &meson_gxbb_periphs_pinctrl_data,
> -	},
> -	{
> -		.compatible = "amlogic,meson-gxbb-aobus-pinctrl",
> -		.data = &meson_gxbb_aobus_pinctrl_data,
> -	},
> -	{
> -		.compatible = "amlogic,meson-gxl-periphs-pinctrl",
> -		.data = &meson_gxl_periphs_pinctrl_data,
> -	},
> -	{
> -		.compatible = "amlogic,meson-gxl-aobus-pinctrl",
> -		.data = &meson_gxl_aobus_pinctrl_data,
> -	},
> -	{ },
> -};
> -
>  static int meson_gpiolib_register(struct meson_pinctrl *pc)
>  {
>  	int ret;
> @@ -624,7 +588,7 @@ static int meson_pinctrl_parse_dt(struct meson_pinctrl *pc,
>  	return 0;
>  }
>  
> -static int meson_pinctrl_probe(struct platform_device *pdev)
> +int meson_pinctrl_probe(struct platform_device *pdev)
>  {
>  	const struct of_device_id *match;
>  	struct device *dev = &pdev->dev;
> @@ -636,10 +600,10 @@ static int meson_pinctrl_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  
>  	pc->dev = dev;
> -	match = of_match_node(meson_pinctrl_dt_match, pdev->dev.of_node);
> +	match = of_match_node(dev->driver->of_match_table, dev->of_node);


Minor comment, maybe you could use of_device_get_match_data(dev) here, it will be simpler.

>  	pc->data = (struct meson_pinctrl_data *) match->data;
>  
> -	ret = meson_pinctrl_parse_dt(pc, pdev->dev.of_node);
> +	ret = meson_pinctrl_parse_dt(pc, dev->of_node);
>  	if (ret)
>  		return ret;
>  
> @@ -659,12 +623,3 @@ static int meson_pinctrl_probe(struct platform_device *pdev)
>  
>  	return meson_gpiolib_register(pc);
>  }
> -
> -static struct platform_driver meson_pinctrl_driver = {
> -	.probe		= meson_pinctrl_probe,
> -	.driver = {
> -		.name	= "meson-pinctrl",
> -		.of_match_table = meson_pinctrl_dt_match,
> -	},
> -};
> -builtin_platform_driver(meson_pinctrl_driver);
> diff --git a/drivers/pinctrl/meson/pinctrl-meson.h b/drivers/pinctrl/meson/pinctrl-meson.h
> index 7ed0a80fd9dc..284157d43612 100644
> --- a/drivers/pinctrl/meson/pinctrl-meson.h
> +++ b/drivers/pinctrl/meson/pinctrl-meson.h
> @@ -13,6 +13,7 @@
>  
>  #include <linux/gpio.h>
>  #include <linux/pinctrl/pinctrl.h>
> +#include <linux/platform_device.h>
>  #include <linux/regmap.h>
>  #include <linux/types.h>
>  
> @@ -165,11 +166,5 @@ struct meson_pinctrl {
>  
>  #define MESON_PIN(x) PINCTRL_PIN(x, #x)
>  
> -extern struct meson_pinctrl_data meson8_cbus_pinctrl_data;
> -extern struct meson_pinctrl_data meson8_aobus_pinctrl_data;
> -extern struct meson_pinctrl_data meson8b_cbus_pinctrl_data;
> -extern struct meson_pinctrl_data meson8b_aobus_pinctrl_data;
> -extern struct meson_pinctrl_data meson_gxbb_periphs_pinctrl_data;
> -extern struct meson_pinctrl_data meson_gxbb_aobus_pinctrl_data;
> -extern struct meson_pinctrl_data meson_gxl_periphs_pinctrl_data;
> -extern struct meson_pinctrl_data meson_gxl_aobus_pinctrl_data;
> +/* Common probe function */
> +int meson_pinctrl_probe(struct platform_device *pdev);
> diff --git a/drivers/pinctrl/meson/pinctrl-meson8.c b/drivers/pinctrl/meson/pinctrl-meson8.c
> index fbf8ecd1c2b6..68b345fc105a 100644
> --- a/drivers/pinctrl/meson/pinctrl-meson8.c
> +++ b/drivers/pinctrl/meson/pinctrl-meson8.c
> @@ -1044,7 +1044,7 @@ static struct meson_bank meson8_aobus_banks[] = {
>  	BANK("AO",   GPIOAO_0, GPIO_TEST_N, 0, 13, 0,  0,  0, 16,  0,  0,  0, 16,  1,  0),
>  };
>  
> -struct meson_pinctrl_data meson8_cbus_pinctrl_data = {
> +static struct meson_pinctrl_data meson8_cbus_pinctrl_data = {
>  	.name		= "cbus-banks",
>  	.pins		= meson8_cbus_pins,
>  	.groups		= meson8_cbus_groups,
> @@ -1056,7 +1056,7 @@ struct meson_pinctrl_data meson8_cbus_pinctrl_data = {
>  	.num_banks	= ARRAY_SIZE(meson8_cbus_banks),
>  };
>  
> -struct meson_pinctrl_data meson8_aobus_pinctrl_data = {
> +static struct meson_pinctrl_data meson8_aobus_pinctrl_data = {
>  	.name		= "ao-bank",
>  	.pins		= meson8_aobus_pins,
>  	.groups		= meson8_aobus_groups,
> @@ -1067,3 +1067,24 @@ struct meson_pinctrl_data meson8_aobus_pinctrl_data = {
>  	.num_funcs	= ARRAY_SIZE(meson8_aobus_functions),
>  	.num_banks	= ARRAY_SIZE(meson8_aobus_banks),
>  };
> +
> +static const struct of_device_id meson8_pinctrl_dt_match[] = {
> +	{
> +		.compatible = "amlogic,meson8-cbus-pinctrl",
> +		.data = &meson8_cbus_pinctrl_data,
> +	},
> +	{
> +		.compatible = "amlogic,meson8-aobus-pinctrl",
> +		.data = &meson8_aobus_pinctrl_data,
> +	},
> +	{ },
> +};
> +
> +static struct platform_driver meson8_pinctrl_driver = {
> +	.probe		= meson_pinctrl_probe,
> +	.driver = {
> +		.name	= "meson8-pinctrl",
> +		.of_match_table = meson8_pinctrl_dt_match,
> +	},
> +};
> +builtin_platform_driver(meson8_pinctrl_driver);
> diff --git a/drivers/pinctrl/meson/pinctrl-meson8b.c b/drivers/pinctrl/meson/pinctrl-meson8b.c
> index 7af296db48c8..4d61df09bc3f 100644
> --- a/drivers/pinctrl/meson/pinctrl-meson8b.c
> +++ b/drivers/pinctrl/meson/pinctrl-meson8b.c
> @@ -904,7 +904,7 @@ static struct meson_bank meson8b_aobus_banks[] = {
>  	BANK("AO",   GPIOAO_0, GPIO_TEST_N, 0, 13, 0,  0,  0, 16,  0,  0,  0, 16,  1,  0),
>  };
>  
> -struct meson_pinctrl_data meson8b_cbus_pinctrl_data = {
> +static struct meson_pinctrl_data meson8b_cbus_pinctrl_data = {
>  	.name		= "cbus-banks",
>  	.pins		= meson8b_cbus_pins,
>  	.groups		= meson8b_cbus_groups,
> @@ -916,7 +916,7 @@ struct meson_pinctrl_data meson8b_cbus_pinctrl_data = {
>  	.num_banks	= ARRAY_SIZE(meson8b_cbus_banks),
>  };
>  
> -struct meson_pinctrl_data meson8b_aobus_pinctrl_data = {
> +static struct meson_pinctrl_data meson8b_aobus_pinctrl_data = {
>  	.name		= "aobus-banks",
>  	.pins		= meson8b_aobus_pins,
>  	.groups		= meson8b_aobus_groups,
> @@ -927,3 +927,24 @@ struct meson_pinctrl_data meson8b_aobus_pinctrl_data = {
>  	.num_funcs	= ARRAY_SIZE(meson8b_aobus_functions),
>  	.num_banks	= ARRAY_SIZE(meson8b_aobus_banks),
>  };
> +
> +static const struct of_device_id meson8b_pinctrl_dt_match[] = {
> +	{
> +		.compatible = "amlogic,meson8b-cbus-pinctrl",
> +		.data = &meson8b_cbus_pinctrl_data,
> +	},
> +	{
> +		.compatible = "amlogic,meson8b-aobus-pinctrl",
> +		.data = &meson8b_aobus_pinctrl_data,
> +	},
> +	{ },
> +};
> +
> +static struct platform_driver meson8b_pinctrl_driver = {
> +	.probe		= meson_pinctrl_probe,
> +	.driver = {
> +		.name	= "meson8b-pinctrl",
> +		.of_match_table = meson8b_pinctrl_dt_match,
> +	},
> +};
> +builtin_platform_driver(meson8b_pinctrl_driver);
> 

Apart the comment on of_device_get_match_data() :

Reviewed-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
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