From: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> All device helpers that are defined in plat-s5pc1xx are S5PC100 specific. This patch moves them to mach-s5pc100 directory to make use of newly created sub-platform support. Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> --- arch/arm/mach-s5pc100/Kconfig | 32 ++++++++++-- arch/arm/mach-s5pc100/Makefile | 4 ++ arch/arm/mach-s5pc100/setup-fb-24bpp.c | 49 +++++++++++++++++ arch/arm/mach-s5pc100/setup-i2c0.c | 30 ++++++++++ arch/arm/mach-s5pc100/setup-i2c1.c | 30 ++++++++++ arch/arm/mach-s5pc100/setup-sdhci-gpio.c | 86 ++++++++++++++++++++++++++++++ arch/arm/plat-s5pc1xx/Kconfig | 24 -------- arch/arm/plat-s5pc1xx/Makefile | 4 -- arch/arm/plat-s5pc1xx/setup-fb-24bpp.c | 49 ----------------- arch/arm/plat-s5pc1xx/setup-i2c0.c | 30 ---------- arch/arm/plat-s5pc1xx/setup-i2c1.c | 30 ---------- arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c | 86 ------------------------------ 12 files changed, 227 insertions(+), 227 deletions(-) create mode 100644 arch/arm/mach-s5pc100/setup-fb-24bpp.c create mode 100644 arch/arm/mach-s5pc100/setup-i2c0.c create mode 100644 arch/arm/mach-s5pc100/setup-i2c1.c create mode 100644 arch/arm/mach-s5pc100/setup-sdhci-gpio.c delete mode 100644 arch/arm/plat-s5pc1xx/setup-fb-24bpp.c delete mode 100644 arch/arm/plat-s5pc1xx/setup-i2c0.c delete mode 100644 arch/arm/plat-s5pc1xx/setup-i2c1.c delete mode 100644 arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c diff --git a/arch/arm/mach-s5pc100/Kconfig b/arch/arm/mach-s5pc100/Kconfig index c393ae6..21d5cdd 100644 --- a/arch/arm/mach-s5pc100/Kconfig +++ b/arch/arm/mach-s5pc100/Kconfig @@ -12,12 +12,36 @@ config CPU_S5PC100 help Enable S5PC100 CPU support +config S5PC100_SETUP_FB_24BPP + bool + help + Common setup code for S5PC1XX with an 24bpp RGB display helper. + +config S5PC100_SETUP_I2C0 + bool + default y + help + Common setup code for i2c bus 0. + + Note, currently since i2c0 is always compiled, this setup helper + is always compiled with it. + +config S5PC100_SETUP_I2C1 + bool + help + Common setup code for i2c bus 1. + config S5PC100_SETUP_SDHCI bool - select S5PC1XX_SETUP_SDHCI_GPIO + select S5PC100_SETUP_SDHCI_GPIO help Internal helper functions for S5PC100 based SDHCI systems +config S5PC100_SETUP_SDHCI_GPIO + bool + help + Common setup code for SDHCI gpio. + config MACH_SMDKC100 bool "SMDKC100" select CPU_S5PC100 @@ -26,9 +50,9 @@ config MACH_SMDKC100 select S3C_DEV_HSMMC select S3C_DEV_HSMMC1 select S3C_DEV_HSMMC2 - select S5PC1XX_SETUP_I2C0 - select S5PC1XX_SETUP_I2C1 - select S5PC1XX_SETUP_FB_24BPP + select S5PC100_SETUP_I2C0 + select S5PC100_SETUP_I2C1 + select S5PC100_SETUP_FB_24BPP select S5PC100_SETUP_SDHCI help Machine support for the Samsung SMDKC100 diff --git a/arch/arm/mach-s5pc100/Makefile b/arch/arm/mach-s5pc100/Makefile index 8d29ea1..b0664ce 100644 --- a/arch/arm/mach-s5pc100/Makefile +++ b/arch/arm/mach-s5pc100/Makefile @@ -19,7 +19,11 @@ obj-$(CONFIG_CPU_S5PC100) += uarts.o # Helper and device support +obj-$(CONFIG_S5PC100_SETUP_FB_24BPP) += setup-fb-24bpp.o +obj-$(CONFIG_S5PC100_SETUP_I2C0) += setup-i2c0.o +obj-$(CONFIG_S5PC100_SETUP_I2C1) += setup-i2c1.o obj-$(CONFIG_S5PC100_SETUP_SDHCI) += setup-sdhci.o +obj-$(CONFIG_S5PC100_SETUP_SDHCI_GPIO) += setup-sdhci-gpio.o # machine support obj-$(CONFIG_MACH_SMDKC100) += mach-smdkc100.o diff --git a/arch/arm/mach-s5pc100/setup-fb-24bpp.c b/arch/arm/mach-s5pc100/setup-fb-24bpp.c new file mode 100644 index 0000000..1a63768 --- /dev/null +++ b/arch/arm/mach-s5pc100/setup-fb-24bpp.c @@ -0,0 +1,49 @@ +/* + * linux/arch/arm/plat-s5pc100/setup-fb-24bpp.c + * + * Copyright 2009 Samsung Electronics + * + * Base S5PC1XX setup information for 24bpp LCD framebuffer + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/fb.h> +#include <linux/gpio.h> + +#include <mach/regs-fb.h> +#include <mach/map.h> +#include <plat/fb.h> +#include <plat/gpio-cfg.h> +#include <plat/gpio-cfg-s5pc1xx.h> + +#define DISR_OFFSET 0x7008 + +void s5pc100_fb_gpio_setup_24bpp(void) +{ + unsigned int gpio = 0; + + for (gpio = S5PC100_GPF0(0); gpio <= S5PC100_GPF0(7); gpio++) { + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } + + for (gpio = S5PC100_GPF1(0); gpio <= S5PC100_GPF1(7); gpio++) { + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } + + for (gpio = S5PC100_GPF2(0); gpio <= S5PC100_GPF2(7); gpio++) { + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } + + for (gpio = S5PC100_GPF3(0); gpio <= S5PC100_GPF3(3); gpio++) { + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } +} diff --git a/arch/arm/mach-s5pc100/setup-i2c0.c b/arch/arm/mach-s5pc100/setup-i2c0.c new file mode 100644 index 0000000..5e4a7c3 --- /dev/null +++ b/arch/arm/mach-s5pc100/setup-i2c0.c @@ -0,0 +1,30 @@ +/* linux/arch/arm/plat-s5pc1xx/setup-i2c0.c + * + * Copyright 2009 Samsung Electronics Co. + * Byungho Min <bhmin@xxxxxxxxxxx> + * + * Base S5PC1XX I2C bus 0 gpio configuration + * + * Based on plat-s3c64xx/setup-i2c0.c + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <linux/kernel.h> +#include <linux/types.h> + +struct platform_device; /* don't need the contents */ + +#include <linux/gpio.h> +#include <plat/iic.h> +#include <plat/gpio-cfg.h> + +void s3c_i2c0_cfg_gpio(struct platform_device *dev) +{ + s3c_gpio_cfgpin(S5PC100_GPD(3), S3C_GPIO_SFN(2)); + s3c_gpio_setpull(S5PC100_GPD(3), S3C_GPIO_PULL_UP); + s3c_gpio_cfgpin(S5PC100_GPD(4), S3C_GPIO_SFN(2)); + s3c_gpio_setpull(S5PC100_GPD(4), S3C_GPIO_PULL_UP); +} diff --git a/arch/arm/mach-s5pc100/setup-i2c1.c b/arch/arm/mach-s5pc100/setup-i2c1.c new file mode 100644 index 0000000..a0a8b4a --- /dev/null +++ b/arch/arm/mach-s5pc100/setup-i2c1.c @@ -0,0 +1,30 @@ +/* linux/arch/arm/plat-s3c64xx/setup-i2c1.c + * + * Copyright 2009 Samsung Electronics Co. + * Byungho Min <bhmin@xxxxxxxxxxx> + * + * Base S5PC1XX I2C bus 1 gpio configuration + * + * Based on plat-s3c64xx/setup-i2c1.c + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <linux/kernel.h> +#include <linux/types.h> + +struct platform_device; /* don't need the contents */ + +#include <linux/gpio.h> +#include <plat/iic.h> +#include <plat/gpio-cfg.h> + +void s3c_i2c1_cfg_gpio(struct platform_device *dev) +{ + s3c_gpio_cfgpin(S5PC100_GPD(5), S3C_GPIO_SFN(2)); + s3c_gpio_setpull(S5PC100_GPD(5), S3C_GPIO_PULL_UP); + s3c_gpio_cfgpin(S5PC100_GPD(6), S3C_GPIO_SFN(2)); + s3c_gpio_setpull(S5PC100_GPD(6), S3C_GPIO_PULL_UP); +} diff --git a/arch/arm/mach-s5pc100/setup-sdhci-gpio.c b/arch/arm/mach-s5pc100/setup-sdhci-gpio.c new file mode 100644 index 0000000..185c894 --- /dev/null +++ b/arch/arm/mach-s5pc100/setup-sdhci-gpio.c @@ -0,0 +1,86 @@ +/* linux/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c + * + * Copyright 2009 Samsung Eletronics + * + * S5PC1XX - Helper functions for setting up SDHCI device(s) GPIO (HSMMC) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/gpio.h> +#include <linux/mmc/host.h> +#include <linux/mmc/card.h> + +#include <plat/gpio-cfg.h> +#include <plat/regs-sdhci.h> + +void s5pc100_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width) +{ + unsigned int gpio; + unsigned int end; + unsigned int num; + + num = width; + /* In case of 8 width, we should decrease the 2 */ + if (width == 8) + num = width - 2; + + end = S5PC100_GPG0(2 + num); + + /* Set all the necessary GPG0/GPG1 pins to special-function 0 */ + for (gpio = S5PC100_GPG0(0); gpio < end; gpio++) { + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } + + if (width == 8) { + for (gpio = S5PC100_GPG1(0); gpio <= S5PC100_GPG1(1); gpio++) { + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } + } + + s3c_gpio_setpull(S5PC100_GPG1(2), S3C_GPIO_PULL_UP); + s3c_gpio_cfgpin(S5PC100_GPG1(2), S3C_GPIO_SFN(2)); +} + +void s5pc100_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width) +{ + unsigned int gpio; + unsigned int end; + + end = S5PC100_GPG2(2 + width); + + /* Set all the necessary GPG2 pins to special-function 2 */ + for (gpio = S5PC100_GPG2(0); gpio < end; gpio++) { + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } + + s3c_gpio_setpull(S5PC100_GPG2(6), S3C_GPIO_PULL_UP); + s3c_gpio_cfgpin(S5PC100_GPG2(6), S3C_GPIO_SFN(2)); +} + +void s5pc100_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width) +{ + unsigned int gpio; + unsigned int end; + + end = S5PC100_GPG3(2 + width); + + /* Set all the necessary GPG3 pins to special-function 2 */ + for (gpio = S5PC100_GPG3(0); gpio < end; gpio++) { + s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); + s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); + } + + s3c_gpio_setpull(S5PC100_GPG3(6), S3C_GPIO_PULL_UP); + s3c_gpio_cfgpin(S5PC100_GPG3(6), S3C_GPIO_SFN(2)); +} diff --git a/arch/arm/plat-s5pc1xx/Kconfig b/arch/arm/plat-s5pc1xx/Kconfig index 33a3e79..10c9130 100644 --- a/arch/arm/plat-s5pc1xx/Kconfig +++ b/arch/arm/plat-s5pc1xx/Kconfig @@ -38,28 +38,4 @@ endchoice # platform specific device setup -config S5PC1XX_SETUP_FB_24BPP - bool - help - Common setup code for S5PC1XX with an 24bpp RGB display helper. - -config S5PC1XX_SETUP_I2C0 - bool - default y - help - Common setup code for i2c bus 0. - - Note, currently since i2c0 is always compiled, this setup helper - is always compiled with it. - -config S5PC1XX_SETUP_I2C1 - bool - help - Common setup code for i2c bus 1. - -config S5PC1XX_SETUP_SDHCI_GPIO - bool - help - Common setup code for SDHCI gpio. - endif diff --git a/arch/arm/plat-s5pc1xx/Makefile b/arch/arm/plat-s5pc1xx/Makefile index 39dd0a1..ad187b2 100644 --- a/arch/arm/plat-s5pc1xx/Makefile +++ b/arch/arm/plat-s5pc1xx/Makefile @@ -21,7 +21,3 @@ obj-y += gpiolib.o # Device setup obj-$(CONFIG_S5P_GPIO_CFG_S5PC1XX) += gpio-config.o -obj-$(CONFIG_S5PC1XX_SETUP_FB_24BPP) += setup-fb-24bpp.o -obj-$(CONFIG_S5PC1XX_SETUP_I2C0) += setup-i2c0.o -obj-$(CONFIG_S5PC1XX_SETUP_I2C1) += setup-i2c1.o -obj-$(CONFIG_S5PC1XX_SETUP_SDHCI_GPIO) += setup-sdhci-gpio.o diff --git a/arch/arm/plat-s5pc1xx/setup-fb-24bpp.c b/arch/arm/plat-s5pc1xx/setup-fb-24bpp.c deleted file mode 100644 index 1a63768..0000000 --- a/arch/arm/plat-s5pc1xx/setup-fb-24bpp.c +++ /dev/null @@ -1,49 +0,0 @@ -/* - * linux/arch/arm/plat-s5pc100/setup-fb-24bpp.c - * - * Copyright 2009 Samsung Electronics - * - * Base S5PC1XX setup information for 24bpp LCD framebuffer - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/fb.h> -#include <linux/gpio.h> - -#include <mach/regs-fb.h> -#include <mach/map.h> -#include <plat/fb.h> -#include <plat/gpio-cfg.h> -#include <plat/gpio-cfg-s5pc1xx.h> - -#define DISR_OFFSET 0x7008 - -void s5pc100_fb_gpio_setup_24bpp(void) -{ - unsigned int gpio = 0; - - for (gpio = S5PC100_GPF0(0); gpio <= S5PC100_GPF0(7); gpio++) { - s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); - s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); - } - - for (gpio = S5PC100_GPF1(0); gpio <= S5PC100_GPF1(7); gpio++) { - s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); - s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); - } - - for (gpio = S5PC100_GPF2(0); gpio <= S5PC100_GPF2(7); gpio++) { - s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); - s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); - } - - for (gpio = S5PC100_GPF3(0); gpio <= S5PC100_GPF3(3); gpio++) { - s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); - s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); - } -} diff --git a/arch/arm/plat-s5pc1xx/setup-i2c0.c b/arch/arm/plat-s5pc1xx/setup-i2c0.c deleted file mode 100644 index 5e4a7c3..0000000 --- a/arch/arm/plat-s5pc1xx/setup-i2c0.c +++ /dev/null @@ -1,30 +0,0 @@ -/* linux/arch/arm/plat-s5pc1xx/setup-i2c0.c - * - * Copyright 2009 Samsung Electronics Co. - * Byungho Min <bhmin@xxxxxxxxxxx> - * - * Base S5PC1XX I2C bus 0 gpio configuration - * - * Based on plat-s3c64xx/setup-i2c0.c - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -#include <linux/kernel.h> -#include <linux/types.h> - -struct platform_device; /* don't need the contents */ - -#include <linux/gpio.h> -#include <plat/iic.h> -#include <plat/gpio-cfg.h> - -void s3c_i2c0_cfg_gpio(struct platform_device *dev) -{ - s3c_gpio_cfgpin(S5PC100_GPD(3), S3C_GPIO_SFN(2)); - s3c_gpio_setpull(S5PC100_GPD(3), S3C_GPIO_PULL_UP); - s3c_gpio_cfgpin(S5PC100_GPD(4), S3C_GPIO_SFN(2)); - s3c_gpio_setpull(S5PC100_GPD(4), S3C_GPIO_PULL_UP); -} diff --git a/arch/arm/plat-s5pc1xx/setup-i2c1.c b/arch/arm/plat-s5pc1xx/setup-i2c1.c deleted file mode 100644 index a0a8b4a..0000000 --- a/arch/arm/plat-s5pc1xx/setup-i2c1.c +++ /dev/null @@ -1,30 +0,0 @@ -/* linux/arch/arm/plat-s3c64xx/setup-i2c1.c - * - * Copyright 2009 Samsung Electronics Co. - * Byungho Min <bhmin@xxxxxxxxxxx> - * - * Base S5PC1XX I2C bus 1 gpio configuration - * - * Based on plat-s3c64xx/setup-i2c1.c - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -#include <linux/kernel.h> -#include <linux/types.h> - -struct platform_device; /* don't need the contents */ - -#include <linux/gpio.h> -#include <plat/iic.h> -#include <plat/gpio-cfg.h> - -void s3c_i2c1_cfg_gpio(struct platform_device *dev) -{ - s3c_gpio_cfgpin(S5PC100_GPD(5), S3C_GPIO_SFN(2)); - s3c_gpio_setpull(S5PC100_GPD(5), S3C_GPIO_PULL_UP); - s3c_gpio_cfgpin(S5PC100_GPD(6), S3C_GPIO_SFN(2)); - s3c_gpio_setpull(S5PC100_GPD(6), S3C_GPIO_PULL_UP); -} diff --git a/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c b/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c deleted file mode 100644 index 185c894..0000000 --- a/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c +++ /dev/null @@ -1,86 +0,0 @@ -/* linux/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c - * - * Copyright 2009 Samsung Eletronics - * - * S5PC1XX - Helper functions for setting up SDHCI device(s) GPIO (HSMMC) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/interrupt.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/gpio.h> -#include <linux/mmc/host.h> -#include <linux/mmc/card.h> - -#include <plat/gpio-cfg.h> -#include <plat/regs-sdhci.h> - -void s5pc100_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width) -{ - unsigned int gpio; - unsigned int end; - unsigned int num; - - num = width; - /* In case of 8 width, we should decrease the 2 */ - if (width == 8) - num = width - 2; - - end = S5PC100_GPG0(2 + num); - - /* Set all the necessary GPG0/GPG1 pins to special-function 0 */ - for (gpio = S5PC100_GPG0(0); gpio < end; gpio++) { - s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); - s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); - } - - if (width == 8) { - for (gpio = S5PC100_GPG1(0); gpio <= S5PC100_GPG1(1); gpio++) { - s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); - s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); - } - } - - s3c_gpio_setpull(S5PC100_GPG1(2), S3C_GPIO_PULL_UP); - s3c_gpio_cfgpin(S5PC100_GPG1(2), S3C_GPIO_SFN(2)); -} - -void s5pc100_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width) -{ - unsigned int gpio; - unsigned int end; - - end = S5PC100_GPG2(2 + width); - - /* Set all the necessary GPG2 pins to special-function 2 */ - for (gpio = S5PC100_GPG2(0); gpio < end; gpio++) { - s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); - s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); - } - - s3c_gpio_setpull(S5PC100_GPG2(6), S3C_GPIO_PULL_UP); - s3c_gpio_cfgpin(S5PC100_GPG2(6), S3C_GPIO_SFN(2)); -} - -void s5pc100_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width) -{ - unsigned int gpio; - unsigned int end; - - end = S5PC100_GPG3(2 + width); - - /* Set all the necessary GPG3 pins to special-function 2 */ - for (gpio = S5PC100_GPG3(0); gpio < end; gpio++) { - s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); - s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE); - } - - s3c_gpio_setpull(S5PC100_GPG3(6), S3C_GPIO_PULL_UP); - s3c_gpio_cfgpin(S5PC100_GPG3(6), S3C_GPIO_SFN(2)); -} -- 1.6.4 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html