Re: [PATCH v4 2/3] ARM: S5PV210: Add keypad device helpers

[Joonyoung Shim <jy0922.shim@samsung.com>]

On 6/14/2010 2:18 PM, Kukjin Kim wrote:
> Joonyoung Shim wrote:
>> This patch adds the keypad device platform helpers for S5PV210 cpu.
>>
>> Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
>> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
>> ---
>>  arch/arm/mach-s5pv210/Kconfig            |    5 ++++
>>  arch/arm/mach-s5pv210/Makefile           |    1 +
>>  arch/arm/mach-s5pv210/cpu.c              |    4 +++
>>  arch/arm/mach-s5pv210/include/mach/map.h |    3 ++
>>  arch/arm/mach-s5pv210/setup-keypad.c     |   34
>> ++++++++++++++++++++++++++++++
>>  5 files changed, 47 insertions(+), 0 deletions(-)
>>  create mode 100644 arch/arm/mach-s5pv210/setup-keypad.c
>>
>> diff --git a/arch/arm/mach-s5pv210/Kconfig b/arch/arm/mach-s5pv210/Kconfig
>> index 0761eac..692d01c 100644
>> --- a/arch/arm/mach-s5pv210/Kconfig
>> +++ b/arch/arm/mach-s5pv210/Kconfig
>> @@ -32,6 +32,11 @@ config S5PV210_SETUP_FB_24BPP
>>  	help
>>            Common setup code for S5PV210 with an 24bpp RGB display helper.
>>
>> +config S5PV210_SETUP_KEYPAD
>> +	bool
>> +	help
>> +	  Common setup code for keypad.
>> +
>>  config S5PV210_SETUP_SDHCI
>>          bool
>>          select S5PV210_SETUP_SDHCI_GPIO
>> diff --git a/arch/arm/mach-s5pv210/Makefile
> b/arch/arm/mach-s5pv210/Makefile
>> index 30be9a6..aae592a 100644
>> --- a/arch/arm/mach-s5pv210/Makefile
>> +++ b/arch/arm/mach-s5pv210/Makefile
>> @@ -31,5 +31,6 @@ obj-$(CONFIG_S5PC110_DEV_ONENAND) += dev-onenand.o
>>  obj-$(CONFIG_S5PV210_SETUP_FB_24BPP)	+= setup-fb-24bpp.o
>>  obj-$(CONFIG_S5PV210_SETUP_I2C1) 	+= setup-i2c1.o
>>  obj-$(CONFIG_S5PV210_SETUP_I2C2) 	+= setup-i2c2.o
>> +obj-$(CONFIG_S5PV210_SETUP_KEYPAD)	+= setup-keypad.o
>>  obj-$(CONFIG_S5PV210_SETUP_SDHCI)       += setup-sdhci.o
>>  obj-$(CONFIG_S5PV210_SETUP_SDHCI_GPIO)	+= setup-sdhci-gpio.o
>> diff --git a/arch/arm/mach-s5pv210/cpu.c b/arch/arm/mach-s5pv210/cpu.c
>> index 411a4a9..a3034ac 100644
>> --- a/arch/arm/mach-s5pv210/cpu.c
>> +++ b/arch/arm/mach-s5pv210/cpu.c
>> @@ -80,6 +80,10 @@ void __init s5pv210_map_io(void)
>>  	s3c_device_adc.name	= "s3c64xx-adc";
>>  #endif
>>
>> +#ifdef CONFIG_SAMSUNG_DEV_KEYPAD
>> +	samsung_device_keypad.name = "s5pv210-keypad";
>> +#endif
>> +
> 
> Please use one method. See Kyungmin Park's prev. comments on the subject.
> 

I cannot understand this comment meaning and where is Kyungmin's
comments? Please let me know detailed thing.

>>  	iotable_init(s5pv210_iodesc, ARRAY_SIZE(s5pv210_iodesc));
>>
>>  	/* initialise device information early */
>> diff --git a/arch/arm/mach-s5pv210/include/mach/map.h b/arch/arm/mach-
>> s5pv210/include/mach/map.h
>> index 34eb168..e2f6e2a 100644
>> --- a/arch/arm/mach-s5pv210/include/mach/map.h
>> +++ b/arch/arm/mach-s5pv210/include/mach/map.h
>> @@ -32,6 +32,8 @@
>>  #define S5PV210_PA_SPI0		0xE1300000
>>  #define S5PV210_PA_SPI1		0xE1400000
>>
>> +#define S5PV210_PA_KEYPAD	(0xE1600000)
>> +
>>  #define S5PV210_PA_IIC0		(0xE1800000)
>>  #define S5PV210_PA_IIC1		(0xFAB00000)
>>  #define S5PV210_PA_IIC2		(0xE1A00000)
>> @@ -104,5 +106,6 @@
>>  #define S3C_PA_WDT		S5PV210_PA_WATCHDOG
>>
>>  #define SAMSUNG_PA_ADC		S5PV210_PA_ADC
>> +#define SAMSUNG_PA_KEYPAD	S5PV210_PA_KEYPAD
>>
>>  #endif /* __ASM_ARCH_MAP_H */
>> diff --git a/arch/arm/mach-s5pv210/setup-keypad.c
> b/arch/arm/mach-s5pv210/setup-
>> keypad.c
>> new file mode 100644
>> index 0000000..f51bf8d
>> --- /dev/null
>> +++ b/arch/arm/mach-s5pv210/setup-keypad.c
>> @@ -0,0 +1,34 @@
>> +/*
>> + * linux/arch/arm/mach-s5pv210/setup-keypad.c
>> + *
>> + * Copyright (C) 2010 Samsung Electronics Co.Ltd
>> + * Author: Joonyoung Shim <jy0922.shim@samsung.com>
>> + *
>> + *  This program is free software; you can redistribute  it and/or modify
> it
>> + *  under  the terms of  the GNU General  Public License as published by
> the
>> + *  Free Software Foundation;  either version 2 of the  License, or (at
> your
>> + *  option) any later version.
>> + *
>> + */
>> +
>> +#include <linux/gpio.h>
>> +#include <plat/gpio-cfg.h>
>> +
>> +void samsung_keypad_cfg_gpio(unsigned int rows, unsigned int cols)
>> +{
>> +	unsigned int gpio, end;
>> +
>> +	/* Set all the necessary GPH3 pins to special-function 3 */
> 
> What's the special-function 3?

I refered s3c_gpio_cfgpin() comments of
arch/arm/plat-samsung/include/plat/gpio-cfg.h

I think this is enough comments but if you want more specific comments
still, i can add it.

Thanks.

> How about 'special function KP_ROWs'?
> 
>> +	end = S5PV210_GPH3(rows);
>> +	for (gpio = S5PV210_GPH3(0); gpio < end; gpio++) {
>> +		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
>> +		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
>> +	}
>> +
>> +	/* Set all the necessary GPH2 pins to special-function 3 */
> 
> How about 'special function KP_COLs'?
> 
>> +	end = S5PV210_GPH2(cols);
>> +	for (gpio = S5PV210_GPH2(0); gpio < end; gpio++) {
>> +		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(3));
>> +		s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
>> +	}
>> +}
>> --
> 
> 
> Thanks.
> 
> Best regards,
> Kgene.
> --
> Kukjin Kim <kgene.kim@samsung.com>, Senior Engineer,
> SW Solution Development Team, Samsung Electronics Co., Ltd.
> 
>