Re: [PATCH v8 2/3] ARM: S3C64XX: Enabling samsung-usbphy driver

[Tomasz Figa <tomasz.figa@gmail.com>]

Hi Praveen,

On Wednesday 14 of November 2012 16:15:37 Praveen Paneri wrote:
> Adding platform device for samsung-usbphy driver. Enabling it for
> s3c64xx based machines using s3c-hsotg.
> 
> Signed-off-by: Praveen Paneri <p.paneri@samsung.com>
> ---
>  arch/arm/mach-s3c64xx/include/mach/map.h     |    2 +
>  arch/arm/mach-s3c64xx/mach-crag6410.c        |    7 ++++++
>  arch/arm/mach-s3c64xx/mach-smartq.c          |    8 +++++++
>  arch/arm/mach-s3c64xx/mach-smdk6410.c        |    7 ++++++
>  arch/arm/mach-s3c64xx/setup-usb-phy.c        |   14 +++++++++++++
>  arch/arm/plat-samsung/devs.c                 |   28
> ++++++++++++++++++++++++++ arch/arm/plat-samsung/include/plat/devs.h   
> |    1 +
>  arch/arm/plat-samsung/include/plat/usb-phy.h |    1 +
>  8 files changed, 68 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/mach-s3c64xx/include/mach/map.h
> b/arch/arm/mach-s3c64xx/include/mach/map.h index 8e2097b..dc482bb
> 100644
> --- a/arch/arm/mach-s3c64xx/include/mach/map.h
> +++ b/arch/arm/mach-s3c64xx/include/mach/map.h
> @@ -65,6 +65,7 @@
> 
>  #define S3C64XX_PA_NAND		(0x70200000)
>  #define S3C64XX_PA_FB		(0x77100000)
> +#define S3C64XX_PA_USB_HSPHY	(0x7C100000)
>  #define S3C64XX_PA_USB_HSOTG	(0x7C000000)
>  #define S3C64XX_PA_WATCHDOG	(0x7E004000)
>  #define S3C64XX_PA_RTC		(0x7E005000)
> @@ -113,6 +114,7 @@
>  #define S3C_PA_FB		S3C64XX_PA_FB
>  #define S3C_PA_USBHOST		S3C64XX_PA_USBHOST
>  #define S3C_PA_USB_HSOTG	S3C64XX_PA_USB_HSOTG
> +#define S3C_PA_USB_PHY		S3C64XX_PA_USB_HSPHY
>  #define S3C_PA_RTC		S3C64XX_PA_RTC
>  #define S3C_PA_WDT		S3C64XX_PA_WATCHDOG
>  #define S3C_PA_SPI0		S3C64XX_PA_SPI0
> diff --git a/arch/arm/mach-s3c64xx/mach-crag6410.c
> b/arch/arm/mach-s3c64xx/mach-crag6410.c index 48f4a2d..c602379 100644
> --- a/arch/arm/mach-s3c64xx/mach-crag6410.c
> +++ b/arch/arm/mach-s3c64xx/mach-crag6410.c
> @@ -31,6 +31,7 @@
>  #include <linux/spi/spi.h>
> 
>  #include <linux/i2c/pca953x.h>
> +#include <linux/platform_data/samsung-usbphy.h>
> 
>  #include <video/platform_lcd.h>
> 
> @@ -69,6 +70,7 @@
>  #include <plat/adc.h>
>  #include <linux/platform_data/i2c-s3c2410.h>
>  #include <plat/pm.h>
> +#include <plat/usb-phy.h>
> 
>  #include "common.h"
> 
> @@ -353,6 +355,7 @@ static struct platform_device wallvdd_device = {
>  };
> 
>  static struct platform_device *crag6410_devices[] __initdata = {
> +	&samsung_device_usbphy,
>  	&s3c_device_hsmmc0,
>  	&s3c_device_hsmmc2,
>  	&s3c_device_i2c0,
> @@ -804,6 +807,9 @@ static const struct gpio_led_platform_data
> gpio_leds_pdata = { .num_leds = ARRAY_SIZE(gpio_leds),
>  };
> 
> +static struct samsung_usbphy_data crag6410_usbphy_pdata __initdata = {
> +	.pmu_isolation = s5p_usb_phy_pmu_isolation,
> +};

Why not define default platform data somewhere and always use it for 
s3c64xx, without redefining the same structure in all boards?

>  static void __init crag6410_machine_init(void)
>  {
> @@ -829,6 +835,7 @@ static void __init crag6410_machine_init(void)
>  	s3c_i2c0_set_platdata(&i2c0_pdata);
>  	s3c_i2c1_set_platdata(&i2c1_pdata);
>  	s3c_fb_set_platdata(&crag6410_lcd_pdata);
> +	samsung_usbphy_set_pdata(&crag6410_usbphy_pdata);
> 
>  	i2c_register_board_info(0, i2c_devs0, ARRAY_SIZE(i2c_devs0));
>  	i2c_register_board_info(1, i2c_devs1, ARRAY_SIZE(i2c_devs1));
> diff --git a/arch/arm/mach-s3c64xx/mach-smartq.c
> b/arch/arm/mach-s3c64xx/mach-smartq.c index 59bb34c..f18a0ab 100644
> --- a/arch/arm/mach-s3c64xx/mach-smartq.c
> +++ b/arch/arm/mach-s3c64xx/mach-smartq.c
> @@ -18,6 +18,7 @@
>  #include <linux/serial_core.h>
>  #include <linux/spi/spi_gpio.h>
>  #include <linux/usb/gpio_vbus.h>
> +#include <linux/platform_data/samsung-usbphy.h>
> 
>  #include <asm/mach-types.h>
>  #include <asm/mach/map.h>
> @@ -36,6 +37,7 @@
>  #include <linux/platform_data/usb-ohci-s3c2410.h>
>  #include <plat/sdhci.h>
>  #include <linux/platform_data/touchscreen-s3c2410.h>
> +#include <plat/usb-phy.h>
> 
>  #include <video/platform_lcd.h>
> 
> @@ -234,6 +236,7 @@ static struct i2c_board_info smartq_i2c_devs[]
> __initdata = { };
> 
>  static struct platform_device *smartq_devices[] __initdata = {
> +	&samsung_device_usbphy,
>  	&s3c_device_hsmmc1,	/* Init iNAND first, ... */
>  	&s3c_device_hsmmc0,	/* ... then the external SD card */
>  	&s3c_device_hsmmc2,
> @@ -380,9 +383,14 @@ void __init smartq_map_io(void)
>  	smartq_lcd_mode_set();
>  }
> 
> +static struct samsung_usbphy_data smartq_usbphy_pdata __initdata = {
> +	.pmu_isolation = s5p_usb_phy_pmu_isolation,
> +};
> +
>  void __init smartq_machine_init(void)
>  {
>  	s3c_i2c0_set_platdata(NULL);
> +	samsung_usbphy_set_pdata(&smartq_usbphy_pdata);
>  	s3c_hwmon_set_platdata(&smartq_hwmon_pdata);
>  	s3c_sdhci1_set_platdata(&smartq_internal_hsmmc_pdata);
>  	s3c_sdhci2_set_platdata(&smartq_internal_hsmmc_pdata);
> diff --git a/arch/arm/mach-s3c64xx/mach-smdk6410.c
> b/arch/arm/mach-s3c64xx/mach-smdk6410.c index 123f452..00e46a6 100644
> --- a/arch/arm/mach-s3c64xx/mach-smdk6410.c
> +++ b/arch/arm/mach-s3c64xx/mach-smdk6410.c
> @@ -30,6 +30,7 @@
>  #include <linux/regulator/fixed.h>
>  #include <linux/regulator/machine.h>
>  #include <linux/pwm_backlight.h>
> +#include <linux/platform_data/samsung-usbphy.h>
> 
>  #ifdef CONFIG_SMDK6410_WM1190_EV1
>  #include <linux/mfd/wm8350/core.h>
> @@ -72,6 +73,7 @@
>  #include <linux/platform_data/touchscreen-s3c2410.h>
>  #include <plat/keypad.h>
>  #include <plat/backlight.h>
> +#include <plat/usb-phy.h>
> 
>  #include "common.h"
> 
> @@ -263,6 +265,7 @@ static struct samsung_keypad_platdata
> smdk6410_keypad_data __initdata = { static struct map_desc
> smdk6410_iodesc[] = {};
> 
>  static struct platform_device *smdk6410_devices[] __initdata = {
> +	&samsung_device_usbphy,
>  #ifdef CONFIG_SMDK6410_SD_CH0
>  	&s3c_device_hsmmc0,
>  #endif
> @@ -626,6 +629,9 @@ static struct platform_pwm_backlight_data
> smdk6410_bl_data = { .pwm_id = 1,
>  };
> 
> +static struct samsung_usbphy_data smdk6410_usbphy_pdata __initdata = {
> +	.pmu_isolation = s5p_usb_phy_pmu_isolation,
> +};
> 
>  static void __init smdk6410_map_io(void)
>  {
> @@ -655,6 +661,7 @@ static void __init smdk6410_machine_init(void)
>  	s3c_i2c0_set_platdata(NULL);
>  	s3c_i2c1_set_platdata(NULL);
>  	s3c_fb_set_platdata(&smdk6410_lcd_pdata);
> +	samsung_usbphy_set_pdata(&smdk6410_usbphy_pdata);
> 
>  	samsung_keypad_set_platdata(&smdk6410_keypad_data);
> 
> diff --git a/arch/arm/mach-s3c64xx/setup-usb-phy.c
> b/arch/arm/mach-s3c64xx/setup-usb-phy.c index 7a09553..3aee778 100644
> --- a/arch/arm/mach-s3c64xx/setup-usb-phy.c
> +++ b/arch/arm/mach-s3c64xx/setup-usb-phy.c
> @@ -9,3 +9,17 @@
>   *
>   */
> 
> +#include <linux/io.h>
> +#include <mach/map.h>
> +#include <mach/regs-sys.h>
> +
> +void s5p_usb_phy_pmu_isolation(int on)
> +{
> +	if (on) {
> +		writel(readl(S3C64XX_OTHERS) & ~S3C64XX_OTHERS_USBMASK,
> +			S3C64XX_OTHERS);
> +	} else {
> +		writel(readl(S3C64XX_OTHERS) | S3C64XX_OTHERS_USBMASK,
> +			S3C64XX_OTHERS);
> +	}

nitpick: Unnecessary braces for one line if/else.

> +}
> diff --git a/arch/arm/plat-samsung/devs.c b/arch/arm/plat-samsung/devs.c
> index bc50b20..4031c77 100644
> --- a/arch/arm/plat-samsung/devs.c
> +++ b/arch/arm/plat-samsung/devs.c
> @@ -31,6 +31,7 @@
>  #include <linux/ioport.h>
>  #include <linux/platform_data/s3c-hsudc.h>
>  #include <linux/platform_data/s3c-hsotg.h>
> +#include <linux/platform_data/samsung-usbphy.h>
> 
>  #include <media/s5p_hdmi.h>
> 
> @@ -1367,6 +1368,30 @@ struct platform_device s5p_device_mixer = {
> 
>  /* USB */
> 
> +#ifdef CONFIG_ARCH_S3C64XX
> +/* USB PHY*/
> +static struct resource samsung_usbphy_resource[] = {
> +	[0] = {
> +		.start = S3C_PA_USB_PHY,
> +		.end   = S3C_PA_USB_PHY + SZ_16 - 1,
> +		.flags = IORESOURCE_MEM,
> +	},
> +};
> +
> +struct platform_device samsung_device_usbphy = {
> +	.name		= "s3c64xx-usbphy",
> +	.id		= -1,
> +	.num_resources	= ARRAY_SIZE(samsung_usbphy_resource),
> +	.resource	= samsung_usbphy_resource,
> +};
> +
> +void __init samsung_usbphy_set_pdata(struct samsung_usbphy_data *pd)
> +{
> +	s3c_set_platdata(pd, sizeof(struct samsung_usbphy_data),
> +			&samsung_device_usbphy);
> +}

This is strange. samsung_usbphy_set_pdata is declared unconditionally in 
linux/platform_data/samsung-usbphy.h , but it's defined only for S3C64XX?

Maybe the condition should be CONFIG_SAMSUNG_USBPHY not 
CONFIG_ARCH_S3C64XX and in case of CONFIG_SAMSUNG_USBPHY disabled a dummy 
inline samsung_usphy_set_pdata should be defined in the header?

Best regards,
Tomasz Figa