diff options
author | Olof Johansson <olof@lixom.net> | 2013-08-04 12:20:23 -0700 |
---|---|---|
committer | Olof Johansson <olof@lixom.net> | 2013-08-04 12:20:23 -0700 |
commit | 16649596d701c0f4f767bbcad7da4d6343ba8a9e (patch) | |
tree | 271e71f83890ac9789d75902a1761a47a82f57b7 | |
parent | ad81f0545ef01ea651886dddac4bef6cec930092 (diff) | |
parent | 0fb19cdabfc3f8884bac53fd81b02bf61c7904af (diff) | |
download | linux-stable-16649596d701c0f4f767bbcad7da4d6343ba8a9e.tar.gz linux-stable-16649596d701c0f4f767bbcad7da4d6343ba8a9e.tar.bz2 linux-stable-16649596d701c0f4f767bbcad7da4d6343ba8a9e.zip |
Merge tag 'renesas-backlight-for-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/boards
From Simon Horman:
Renesas ARM and SH based SoC backlight drivers for v3.12
Backlight drivers used by SH and ARM SH-Mobile boards.
* tag 'renesas-backlight-for-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
ARM: mach-shmobile: ag5evm: Use bd6107 backlight driver
sh: kfr2r09: Use lv5207lp backlight
sh: ecovec24: Use gpio-backlight
ARM: mach-shmobile: mackerel: Use gpio-backlight
backlight: Add ROHM BD6107 backlight driver
backlight: Add Sanyo LV5207LP backlight driver
backlight: Add GPIO-based backlight driver
Signed-off-by: Olof Johansson <olof@lixom.net>
-rw-r--r-- | arch/arm/mach-shmobile/board-ag5evm.c | 65 | ||||
-rw-r--r-- | arch/arm/mach-shmobile/board-mackerel.c | 34 | ||||
-rw-r--r-- | arch/sh/boards/mach-ecovec24/setup.c | 37 | ||||
-rw-r--r-- | arch/sh/boards/mach-kfr2r09/lcd_wqvga.c | 48 | ||||
-rw-r--r-- | arch/sh/boards/mach-kfr2r09/setup.c | 19 | ||||
-rw-r--r-- | arch/sh/include/mach-kfr2r09/mach/kfr2r09.h | 2 | ||||
-rw-r--r-- | drivers/video/backlight/Kconfig | 19 | ||||
-rw-r--r-- | drivers/video/backlight/Makefile | 3 | ||||
-rw-r--r-- | drivers/video/backlight/bd6107.c | 213 | ||||
-rw-r--r-- | drivers/video/backlight/gpio_backlight.c | 133 | ||||
-rw-r--r-- | drivers/video/backlight/lv5207lp.c | 171 | ||||
-rw-r--r-- | include/linux/platform_data/bd6107.h | 19 | ||||
-rw-r--r-- | include/linux/platform_data/gpio_backlight.h | 21 | ||||
-rw-r--r-- | include/linux/platform_data/lv5207lp.h | 19 |
14 files changed, 665 insertions, 138 deletions
diff --git a/arch/arm/mach-shmobile/board-ag5evm.c b/arch/arm/mach-shmobile/board-ag5evm.c index c7540710906f..f6d64495c405 100644 --- a/arch/arm/mach-shmobile/board-ag5evm.c +++ b/arch/arm/mach-shmobile/board-ag5evm.c @@ -41,6 +41,7 @@ #include <linux/mmc/sh_mmcif.h> #include <linux/mmc/sh_mobile_sdhi.h> #include <linux/mfd/tmio.h> +#include <linux/platform_data/bd6107.h> #include <linux/sh_clk.h> #include <linux/irqchip/arm-gic.h> #include <video/sh_mobile_lcdc.h> @@ -291,47 +292,7 @@ static struct platform_device mipidsi0_device = { }, }; -static unsigned char lcd_backlight_seq[3][2] = { - { 0x04, 0x07 }, - { 0x23, 0x80 }, - { 0x03, 0x01 }, -}; - -static int lcd_backlight_set_brightness(int brightness) -{ - struct i2c_adapter *adap; - struct i2c_msg msg; - unsigned int i; - int ret; - - if (brightness == 0) { - /* Reset the chip */ - gpio_set_value(235, 0); - mdelay(24); - gpio_set_value(235, 1); - return 0; - } - - adap = i2c_get_adapter(1); - if (adap == NULL) - return -ENODEV; - - for (i = 0; i < ARRAY_SIZE(lcd_backlight_seq); i++) { - msg.addr = 0x6d; - msg.buf = &lcd_backlight_seq[i][0]; - msg.len = 2; - msg.flags = 0; - - ret = i2c_transfer(adap, &msg, 1); - if (ret < 0) - break; - } - - i2c_put_adapter(adap); - return ret < 0 ? ret : 0; -} - -/* LCDC0 */ +/* LCDC0 and backlight */ static const struct fb_videomode lcdc0_modes[] = { { .name = "R63302(QHD)", @@ -361,11 +322,6 @@ static struct sh_mobile_lcdc_info lcdc0_info = { .width = 44, .height = 79, }, - .bl_info = { - .name = "sh_mobile_lcdc_bl", - .max_brightness = 1, - .set_brightness = lcd_backlight_set_brightness, - }, .tx_dev = &mipidsi0_device, } }; @@ -394,6 +350,17 @@ static struct platform_device lcdc0_device = { }, }; +static struct bd6107_platform_data backlight_data = { + .fbdev = &lcdc0_device.dev, + .reset = 235, + .def_value = 0, +}; + +static struct i2c_board_info backlight_board_info = { + I2C_BOARD_INFO("bd6107", 0x6d), + .platform_data = &backlight_data, +}; + /* Fixed 2.8V regulators to be used by SDHI0 */ static struct regulator_consumer_supply fixed2v8_power_consumers[] = { @@ -648,15 +615,15 @@ static void __init ag5evm_init(void) gpio_set_value(217, 1); mdelay(100); - /* LCD backlight controller */ - gpio_request_one(235, GPIOF_OUT_INIT_LOW, NULL); /* RESET */ - lcd_backlight_set_brightness(0); #ifdef CONFIG_CACHE_L2X0 /* Shared attribute override enable, 64K*8way */ l2x0_init(IOMEM(0xf0100000), 0x00460000, 0xc2000fff); #endif sh73a0_add_standard_devices(); + + i2c_register_board_info(1, &backlight_board_info, 1); + platform_add_devices(ag5evm_devices, ARRAY_SIZE(ag5evm_devices)); } diff --git a/arch/arm/mach-shmobile/board-mackerel.c b/arch/arm/mach-shmobile/board-mackerel.c index 85f51a849a50..af06753eb809 100644 --- a/arch/arm/mach-shmobile/board-mackerel.c +++ b/arch/arm/mach-shmobile/board-mackerel.c @@ -41,6 +41,7 @@ #include <linux/mtd/physmap.h> #include <linux/mtd/sh_flctl.h> #include <linux/pinctrl/machine.h> +#include <linux/platform_data/gpio_backlight.h> #include <linux/pm_clock.h> #include <linux/regulator/fixed.h> #include <linux/regulator/machine.h> @@ -49,7 +50,6 @@ #include <linux/tca6416_keypad.h> #include <linux/usb/renesas_usbhs.h> #include <linux/dma-mapping.h> - #include <video/sh_mobile_hdmi.h> #include <video/sh_mobile_lcdc.h> #include <media/sh_mobile_ceu.h> @@ -346,7 +346,7 @@ static struct platform_device meram_device = { }, }; -/* LCDC */ +/* LCDC and backlight */ static struct fb_videomode mackerel_lcdc_modes[] = { { .name = "WVGA Panel", @@ -362,13 +362,6 @@ static struct fb_videomode mackerel_lcdc_modes[] = { }, }; -static int mackerel_set_brightness(int brightness) -{ - gpio_set_value(31, brightness); - - return 0; -} - static const struct sh_mobile_meram_cfg lcd_meram_cfg = { .icb[0] = { .meram_size = 0x40, @@ -393,11 +386,6 @@ static struct sh_mobile_lcdc_info lcdc_info = { .width = 152, .height = 91, }, - .bl_info = { - .name = "sh_mobile_lcdc_bl", - .max_brightness = 1, - .set_brightness = mackerel_set_brightness, - }, .meram_cfg = &lcd_meram_cfg, } }; @@ -425,6 +413,20 @@ static struct platform_device lcdc_device = { }, }; +static struct gpio_backlight_platform_data gpio_backlight_data = { + .fbdev = &lcdc_device.dev, + .gpio = 31, + .def_value = 1, + .name = "backlight", +}; + +static struct platform_device gpio_backlight_device = { + .name = "gpio-backlight", + .dev = { + .platform_data = &gpio_backlight_data, + }, +}; + /* HDMI */ static struct sh_mobile_hdmi_info hdmi_info = { .flags = HDMI_SND_SRC_SPDIF, @@ -1231,6 +1233,7 @@ static struct platform_device *mackerel_devices[] __initdata = { &nor_flash_device, &smc911x_device, &lcdc_device, + &gpio_backlight_device, &usbhs0_device, &usbhs1_device, &leds_device, @@ -1441,9 +1444,6 @@ static void __init mackerel_init(void) ARRAY_SIZE(mackerel_pinctrl_map)); sh7372_pinmux_init(); - /* backlight, off by default */ - gpio_request_one(31, GPIOF_OUT_INIT_LOW, NULL); - gpio_request_one(151, GPIOF_OUT_INIT_HIGH, NULL); /* LCDDON */ /* USBHS0 */ diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c index 61fade0ffa96..bcbb86bd659e 100644 --- a/arch/sh/boards/mach-ecovec24/setup.c +++ b/arch/sh/boards/mach-ecovec24/setup.c @@ -30,6 +30,7 @@ #include <linux/spi/mmc_spi.h> #include <linux/input.h> #include <linux/input/sh_keysc.h> +#include <linux/platform_data/gpio_backlight.h> #include <linux/sh_eth.h> #include <linux/sh_intc.h> #include <linux/videodev2.h> @@ -303,7 +304,7 @@ static struct platform_device usbhs_device = { .resource = usbhs_resources, }; -/* LCDC */ +/* LCDC and backlight */ static const struct fb_videomode ecovec_lcd_modes[] = { { .name = "Panel", @@ -334,13 +335,6 @@ static const struct fb_videomode ecovec_dvi_modes[] = { }, }; -static int ecovec24_set_brightness(int brightness) -{ - gpio_set_value(GPIO_PTR1, brightness); - - return 0; -} - static struct sh_mobile_lcdc_info lcdc_info = { .ch[0] = { .interface_type = RGB18, @@ -350,11 +344,6 @@ static struct sh_mobile_lcdc_info lcdc_info = { .width = 152, .height = 91, }, - .bl_info = { - .name = "sh_mobile_lcdc_bl", - .max_brightness = 1, - .set_brightness = ecovec24_set_brightness, - }, } }; @@ -380,6 +369,20 @@ static struct platform_device lcdc_device = { }, }; +static struct gpio_backlight_platform_data gpio_backlight_data = { + .fbdev = &lcdc_device.dev, + .gpio = GPIO_PTR1, + .def_value = 1, + .name = "backlight", +}; + +static struct platform_device gpio_backlight_device = { + .name = "gpio-backlight", + .dev = { + .platform_data = &gpio_backlight_data, + }, +}; + /* CEU0 */ static struct sh_mobile_ceu_info sh_mobile_ceu0_info = { .flags = SH_CEU_FLAG_USE_8BIT_BUS, @@ -1049,6 +1052,7 @@ static struct platform_device *ecovec_devices[] __initdata = { &usb1_common_device, &usbhs_device, &lcdc_device, + &gpio_backlight_device, &ceu0_device, &ceu1_device, &keysc_device, @@ -1239,11 +1243,9 @@ static int __init arch_setup(void) gpio_request(GPIO_PTE6, NULL); gpio_request(GPIO_PTU1, NULL); - gpio_request(GPIO_PTR1, NULL); gpio_request(GPIO_PTA2, NULL); gpio_direction_input(GPIO_PTE6); gpio_direction_output(GPIO_PTU1, 0); - gpio_direction_output(GPIO_PTR1, 0); gpio_direction_output(GPIO_PTA2, 0); /* I/O buffer drive ability is high */ @@ -1256,6 +1258,9 @@ static int __init arch_setup(void) lcdc_info.ch[0].lcd_modes = ecovec_dvi_modes; lcdc_info.ch[0].num_modes = ARRAY_SIZE(ecovec_dvi_modes); + /* No backlight */ + gpio_backlight_data.fbdev = NULL; + gpio_set_value(GPIO_PTA2, 1); gpio_set_value(GPIO_PTU1, 1); } else { @@ -1265,8 +1270,6 @@ static int __init arch_setup(void) lcdc_info.ch[0].lcd_modes = ecovec_lcd_modes; lcdc_info.ch[0].num_modes = ARRAY_SIZE(ecovec_lcd_modes); - gpio_set_value(GPIO_PTR1, 1); - /* FIXME * * LCDDON control is needed for Panel, diff --git a/arch/sh/boards/mach-kfr2r09/lcd_wqvga.c b/arch/sh/boards/mach-kfr2r09/lcd_wqvga.c index c62050332629..355a78a3b313 100644 --- a/arch/sh/boards/mach-kfr2r09/lcd_wqvga.c +++ b/arch/sh/boards/mach-kfr2r09/lcd_wqvga.c @@ -276,51 +276,3 @@ void kfr2r09_lcd_start(void *sohandle, struct sh_mobile_lcdc_sys_bus_ops *so) { write_memory_start(sohandle, so); } - -#define CTRL_CKSW 0x10 -#define CTRL_C10 0x20 -#define CTRL_CPSW 0x80 -#define MAIN_MLED4 0x40 -#define MAIN_MSW 0x80 - -int kfr2r09_lcd_set_brightness(int brightness) -{ - struct i2c_adapter *a; - struct i2c_msg msg; - unsigned char buf[2]; - int ret; - - a = i2c_get_adapter(0); - if (!a) - return -ENODEV; - - buf[0] = 0x00; - if (brightness) - buf[1] = CTRL_CPSW | CTRL_C10 | CTRL_CKSW; - else - buf[1] = 0; - - msg.addr = 0x75; - msg.buf = buf; - msg.len = 2; - msg.flags = 0; - ret = i2c_transfer(a, &msg, 1); - if (ret != 1) - return -ENODEV; - - buf[0] = 0x01; - if (brightness) - buf[1] = MAIN_MSW | MAIN_MLED4 | 0x0c; - else - buf[1] = 0; - - msg.addr = 0x75; - msg.buf = buf; - msg.len = 2; - msg.flags = 0; - ret = i2c_transfer(a, &msg, 1); - if (ret != 1) - return -ENODEV; - - return 0; -} diff --git a/arch/sh/boards/mach-kfr2r09/setup.c b/arch/sh/boards/mach-kfr2r09/setup.c index ab502f12ef57..1df4398f8375 100644 --- a/arch/sh/boards/mach-kfr2r09/setup.c +++ b/arch/sh/boards/mach-kfr2r09/setup.c @@ -21,6 +21,7 @@ #include <linux/input.h> #include <linux/input/sh_keysc.h> #include <linux/i2c.h> +#include <linux/platform_data/lv5207lp.h> #include <linux/regulator/fixed.h> #include <linux/regulator/machine.h> #include <linux/usb/r8a66597.h> @@ -159,11 +160,6 @@ static struct sh_mobile_lcdc_info kfr2r09_sh_lcdc_info = { .setup_sys = kfr2r09_lcd_setup, .start_transfer = kfr2r09_lcd_start, }, - .bl_info = { - .name = "sh_mobile_lcdc_bl", - .max_brightness = 1, - .set_brightness = kfr2r09_lcd_set_brightness, - }, .sys_bus_cfg = { .ldmt2r = 0x07010904, .ldmt3r = 0x14012914, @@ -195,6 +191,17 @@ static struct platform_device kfr2r09_sh_lcdc_device = { }, }; +static struct lv5207lp_platform_data kfr2r09_backlight_data = { + .fbdev = &kfr2r09_sh_lcdc_device.dev, + .def_value = 13, + .max_value = 13, +}; + +static struct i2c_board_info kfr2r09_backlight_board_info = { + I2C_BOARD_INFO("lv5207lp", 0x75), + .platform_data = &kfr2r09_backlight_data, +}; + static struct r8a66597_platdata kfr2r09_usb0_gadget_data = { .on_chip = 1, }; @@ -627,6 +634,8 @@ static int __init kfr2r09_devices_setup(void) gpio_request(GPIO_FN_SDHI0CMD, NULL); gpio_request(GPIO_FN_SDHI0CLK, NULL); + i2c_register_board_info(0, &kfr2r09_backlight_board_info, 1); + return platform_add_devices(kfr2r09_devices, ARRAY_SIZE(kfr2r09_devices)); } diff --git a/arch/sh/include/mach-kfr2r09/mach/kfr2r09.h b/arch/sh/include/mach-kfr2r09/mach/kfr2r09.h index c20c9e5f5eab..79f154e5cb9c 100644 --- a/arch/sh/include/mach-kfr2r09/mach/kfr2r09.h +++ b/arch/sh/include/mach-kfr2r09/mach/kfr2r09.h @@ -4,13 +4,11 @@ #include <video/sh_mobile_lcdc.h> #if defined(CONFIG_FB_SH_MOBILE_LCDC) || defined(CONFIG_FB_SH_MOBILE_LCDC_MODULE) -int kfr2r09_lcd_set_brightness(int brightness); int kfr2r09_lcd_setup(void *sys_ops_handle, struct sh_mobile_lcdc_sys_bus_ops *sys_ops); void kfr2r09_lcd_start(void *sys_ops_handle, struct sh_mobile_lcdc_sys_bus_ops *sys_ops); #else -static int kfr2r09_lcd_set_brightness(int brightness) {} static int kfr2r09_lcd_setup(void *sys_ops_handle, struct sh_mobile_lcdc_sys_bus_ops *sys_ops) { diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index d5ab6583f440..d4a7a351d67c 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -425,6 +425,25 @@ config BACKLIGHT_AS3711 If you have an Austrian Microsystems AS3711 say Y to enable the backlight driver. +config BACKLIGHT_GPIO + tristate "Generic GPIO based Backlight Driver" + depends on GPIOLIB + help + If you have a LCD backlight adjustable by GPIO, say Y to enable + this driver. + +config BACKLIGHT_LV5207LP + tristate "Sanyo LV5207LP Backlight" + depends on I2C + help + If you have a Sanyo LV5207LP say Y to enable the backlight driver. + +config BACKLIGHT_BD6107 + tristate "Rohm BD6107 Backlight" + depends on I2C + help + If you have a Rohm BD6107 say Y to enable the backlight driver. + endif # BACKLIGHT_CLASS_DEVICE endif # BACKLIGHT_LCD_SUPPORT diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index 92711fe60464..38e1babb1946 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -26,12 +26,14 @@ obj-$(CONFIG_BACKLIGHT_ADP8870) += adp8870_bl.o obj-$(CONFIG_BACKLIGHT_APPLE) += apple_bl.o obj-$(CONFIG_BACKLIGHT_AS3711) += as3711_bl.o obj-$(CONFIG_BACKLIGHT_ATMEL_PWM) += atmel-pwm-bl.o +obj-$(CONFIG_BACKLIGHT_BD6107) += bd6107.o obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o obj-$(CONFIG_BACKLIGHT_DA903X) += da903x_bl.o obj-$(CONFIG_BACKLIGHT_DA9052) += da9052_bl.o obj-$(CONFIG_BACKLIGHT_EP93XX) += ep93xx_bl.o obj-$(CONFIG_BACKLIGHT_GENERIC) += generic_bl.o +obj-$(CONFIG_BACKLIGHT_GPIO) += gpio_backlight.o obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o obj-$(CONFIG_BACKLIGHT_HP700) += jornada720_bl.o obj-$(CONFIG_BACKLIGHT_LM3533) += lm3533_bl.o @@ -40,6 +42,7 @@ obj-$(CONFIG_BACKLIGHT_LM3639) += lm3639_bl.o obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o obj-$(CONFIG_BACKLIGHT_LP855X) += lp855x_bl.o obj-$(CONFIG_BACKLIGHT_LP8788) += lp8788_bl.o +obj-$(CONFIG_BACKLIGHT_LV5207LP) += lv5207lp.o obj-$(CONFIG_BACKLIGHT_MAX8925) += max8925_bl.o obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o obj-$(CONFIG_BACKLIGHT_OT200) += ot200_bl.o diff --git a/drivers/video/backlight/bd6107.c b/drivers/video/backlight/bd6107.c new file mode 100644 index 000000000000..15e3294b29fe --- /dev/null +++ b/drivers/video/backlight/bd6107.c @@ -0,0 +1,213 @@ +/* + * ROHM Semiconductor BD6107 LED Driver + * + * Copyright (C) 2013 Ideas on board SPRL + * + * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com> + * + * 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/backlight.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/fb.h> +#include <linux/gpio.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/platform_data/bd6107.h> +#include <linux/slab.h> + +#define BD6107_PSCNT1 0x00 +#define BD6107_PSCNT1_PSCNTREG2 (1 << 2) +#define BD6107_PSCNT1_PSCNTREG1 (1 << 0) +#define BD6107_REGVSET 0x02 +#define BD6107_REGVSET_REG1VSET_2_85V (1 << 2) +#define BD6107_REGVSET_REG1VSET_2_80V (0 << 2) +#define BD6107_LEDCNT1 0x03 +#define BD6107_LEDCNT1_LEDONOFF2 (1 << 1) +#define BD6107_LEDCNT1_LEDONOFF1 (1 << 0) +#define BD6107_PORTSEL 0x04 +#define BD6107_PORTSEL_LEDM(n) (1 << (n)) +#define BD6107_RGB1CNT1 0x05 +#define BD6107_RGB1CNT2 0x06 +#define BD6107_RGB1CNT3 0x07 +#define BD6107_RGB1CNT4 0x08 +#define BD6107_RGB1CNT5 0x09 +#define BD6107_RGB1FLM 0x0a +#define BD6107_RGB2CNT1 0x0b +#define BD6107_RGB2CNT2 0x0c +#define BD6107_RGB2CNT3 0x0d +#define BD6107_RGB2CNT4 0x0e +#define BD6107_RGB2CNT5 0x0f +#define BD6107_RGB2FLM 0x10 +#define BD6107_PSCONT3 0x11 +#define BD6107_SMMONCNT 0x12 +#define BD6107_DCDCCNT 0x13 +#define BD6107_IOSEL 0x14 +#define BD6107_OUT1 0x15 +#define BD6107_OUT2 0x16 +#define BD6107_MASK1 0x17 +#define BD6107_MASK2 0x18 +#define BD6107_FACTOR1 0x19 +#define BD6107_FACTOR2 0x1a +#define BD6107_CLRFACT1 0x1b +#define BD6107_CLRFACT2 0x1c +#define BD6107_STATE1 0x1d +#define BD6107_LSIVER 0x1e +#define BD6107_GRPSEL 0x1f +#define BD6107_LEDCNT2 0x20 +#define BD6107_LEDCNT3 0x21 +#define BD6107_MCURRENT 0x22 +#define BD6107_MAINCNT1 0x23 +#define BD6107_MAINCNT2 0x24 +#define BD6107_SLOPECNT 0x25 +#define BD6107_MSLOPE 0x26 +#define BD6107_RGBSLOPE 0x27 +#define BD6107_TEST 0x29 +#define BD6107_SFTRST 0x2a +#define BD6107_SFTRSTGD 0x2b + +struct bd6107 { + struct i2c_client *client; + struct backlight_device *backlight; + struct bd6107_platform_data *pdata; +}; + +static int bd6107_write(struct bd6107 *bd, u8 reg, u8 data) +{ + return i2c_smbus_write_byte_data(bd->client, reg, data); +} + +static int bd6107_backlight_update_status(struct backlight_device *backlight) +{ + struct bd6107 *bd = bl_get_data(backlight); + int brightness = backlight->props.brightness; + + if (backlight->props.power != FB_BLANK_UNBLANK || + backlight->props.fb_blank != FB_BLANK_UNBLANK || + backlight->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) + brightness = 0; + + if (brightness) { + bd6107_write(bd, BD6107_PORTSEL, BD6107_PORTSEL_LEDM(2) | + BD6107_PORTSEL_LEDM(1) | BD6107_PORTSEL_LEDM(0)); + bd6107_write(bd, BD6107_MAINCNT1, brightness); + bd6107_write(bd, BD6107_LEDCNT1, BD6107_LEDCNT1_LEDONOFF1); + } else { + gpio_set_value(bd->pdata->reset, 0); + msleep(24); + gpio_set_value(bd->pdata->reset, 1); + } + + return 0; +} + +static int bd6107_backlight_get_brightness(struct backlight_device *backlight) +{ + return backlight->props.brightness; +} + +static int bd6107_backlight_check_fb(struct backlight_device *backlight, + struct fb_info *info) +{ + struct bd6107 *bd = bl_get_data(backlight); + + return bd->pdata->fbdev == NULL || bd->pdata->fbdev == info->dev; +} + +static const struct backlight_ops bd6107_backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = bd6107_backlight_update_status, + .get_brightness = bd6107_backlight_get_brightness, + .check_fb = bd6107_backlight_check_fb, +}; + +static int bd6107_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct bd6107_platform_data *pdata = client->dev.platform_data; + struct backlight_device *backlight; + struct backlight_properties props; + struct bd6107 *bd; + int ret; + + if (pdata == NULL || !pdata->reset) { + dev_err(&client->dev, "No reset GPIO in platform data\n"); + return -EINVAL; + } + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_warn(&client->dev, + "I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n"); + return -EIO; + } + + bd = devm_kzalloc(&client->dev, sizeof(*bd), GFP_KERNEL); + if (!bd) + return -ENOMEM; + + bd->client = client; + bd->pdata = pdata; + + ret = devm_gpio_request_one(&client->dev, pdata->reset, + GPIOF_DIR_OUT | GPIOF_INIT_LOW, "reset"); + if (ret < 0) { + dev_err(&client->dev, "unable to request reset GPIO\n"); + return ret; + } + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; + props.max_brightness = 128; + props.brightness = clamp_t(unsigned int, pdata->def_value, 0, + props.max_brightness); + + backlight = backlight_device_register(dev_name(&client->dev), + &bd->client->dev, bd, + &bd6107_backlight_ops, &props); + if (IS_ERR(backlight)) { + dev_err(&client->dev, "failed to register backlight\n"); + return PTR_ERR(backlight); + } + + backlight_update_status(backlight); + i2c_set_clientdata(client, backlight); + + return 0; +} + +static int bd6107_remove(struct i2c_client *client) +{ + struct backlight_device *backlight = i2c_get_clientdata(client); + + backlight->props.brightness = 0; + backlight_update_status(backlight); + backlight_device_unregister(backlight); + + return 0; +} + +static const struct i2c_device_id bd6107_ids[] = { + { "bd6107", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, bd6107_ids); + +static struct i2c_driver bd6107_driver = { + .driver = { + .name = "bd6107", + }, + .probe = bd6107_probe, + .remove = bd6107_remove, + .id_table = bd6107_ids, +}; + +module_i2c_driver(bd6107_driver); + +MODULE_DESCRIPTION("Rohm BD6107 Backlight Driver"); +MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/gpio_backlight.c b/drivers/video/backlight/gpio_backlight.c new file mode 100644 index 000000000000..5fa217f9f445 --- /dev/null +++ b/drivers/video/backlight/gpio_backlight.c @@ -0,0 +1,133 @@ +/* + * gpio_backlight.c - Simple GPIO-controlled backlight + * + * 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/backlight.h> +#include <linux/err.h> +#include <linux/fb.h> +#include <linux/gpio.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_data/gpio_backlight.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +struct gpio_backlight { + struct device *dev; + struct device *fbdev; + + int gpio; + int active; +}; + +static int gpio_backlight_update_status(struct backlight_device *bl) +{ + struct gpio_backlight *gbl = bl_get_data(bl); + int brightness = bl->props.brightness; + + if (bl->props.power != FB_BLANK_UNBLANK || + bl->props.fb_blank != FB_BLANK_UNBLANK || + bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) + brightness = 0; + + gpio_set_value(gbl->gpio, brightness ? gbl->active : !gbl->active); + + return 0; +} + +static int gpio_backlight_get_brightness(struct backlight_device *bl) +{ + return bl->props.brightness; +} + +static int gpio_backlight_check_fb(struct backlight_device *bl, + struct fb_info *info) +{ + struct gpio_backlight *gbl = bl_get_data(bl); + + return gbl->fbdev == NULL || gbl->fbdev == info->dev; +} + +static const struct backlight_ops gpio_backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = gpio_backlight_update_status, + .get_brightness = gpio_backlight_get_brightness, + .check_fb = gpio_backlight_check_fb, +}; + +static int gpio_backlight_probe(struct platform_device *pdev) +{ + struct gpio_backlight_platform_data *pdata = pdev->dev.platform_data; + struct backlight_properties props; + struct backlight_device *bl; + struct gpio_backlight *gbl; + int ret; + + if (!pdata) { + dev_err(&pdev->dev, "failed to find platform data\n"); + return -ENODEV; + } + + gbl = devm_kzalloc(&pdev->dev, sizeof(*gbl), GFP_KERNEL); + if (gbl == NULL) + return -ENOMEM; + + gbl->dev = &pdev->dev; + gbl->fbdev = pdata->fbdev; + gbl->gpio = pdata->gpio; + gbl->active = pdata->active_low ? 0 : 1; + + ret = devm_gpio_request_one(gbl->dev, gbl->gpio, GPIOF_DIR_OUT | + (gbl->active ? GPIOF_INIT_LOW + : GPIOF_INIT_HIGH), + pdata->name); + if (ret < 0) { + dev_err(&pdev->dev, "unable to request GPIO\n"); + return ret; + } + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; + props.max_brightness = 1; + bl = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, gbl, + &gpio_backlight_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + + bl->props.brightness = pdata->def_value; + backlight_update_status(bl); + + platform_set_drvdata(pdev, bl); + return 0; +} + +static int gpio_backlight_remove(struct platform_device *pdev) +{ + struct backlight_device *bl = platform_get_drvdata(pdev); + + backlight_device_unregister(bl); + return 0; +} + +static struct platform_driver gpio_backlight_driver = { + .driver = { + .name = "gpio-backlight", + .owner = THIS_MODULE, + }, + .probe = gpio_backlight_probe, + .remove = gpio_backlight_remove, +}; + +module_platform_driver(gpio_backlight_driver); + +MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); +MODULE_DESCRIPTION("GPIO-based Backlight Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:gpio-backlight"); diff --git a/drivers/video/backlight/lv5207lp.c b/drivers/video/backlight/lv5207lp.c new file mode 100644 index 000000000000..498fd73d59b9 --- /dev/null +++ b/drivers/video/backlight/lv5207lp.c @@ -0,0 +1,171 @@ +/* + * Sanyo LV5207LP LED Driver + * + * Copyright (C) 2013 Ideas on board SPRL + * + * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com> + * + * 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/backlight.h> +#include <linux/err.h> +#include <linux/fb.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/platform_data/lv5207lp.h> +#include <linux/slab.h> + +#define LV5207LP_CTRL1 0x00 +#define LV5207LP_CPSW (1 << 7) +#define LV5207LP_SCTEN (1 << 6) +#define LV5207LP_C10 (1 << 5) +#define LV5207LP_CKSW (1 << 4) +#define LV5207LP_RSW (1 << 3) +#define LV5207LP_GSW (1 << 2) +#define LV5207LP_BSW (1 << 1) +#define LV5207LP_CTRL2 0x01 +#define LV5207LP_MSW (1 << 7) +#define LV5207LP_MLED4 (1 << 6) +#define LV5207LP_RED 0x02 +#define LV5207LP_GREEN 0x03 +#define LV5207LP_BLUE 0x04 + +#define LV5207LP_MAX_BRIGHTNESS 32 + +struct lv5207lp { + struct i2c_client *client; + struct backlight_device *backlight; + struct lv5207lp_platform_data *pdata; +}; + +static int lv5207lp_write(struct lv5207lp *lv, u8 reg, u8 data) +{ + return i2c_smbus_write_byte_data(lv->client, reg, data); +} + +static int lv5207lp_backlight_update_status(struct backlight_device *backlight) +{ + struct lv5207lp *lv = bl_get_data(backlight); + int brightness = backlight->props.brightness; + + if (backlight->props.power != FB_BLANK_UNBLANK || + backlight->props.fb_blank != FB_BLANK_UNBLANK || + backlight->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) + brightness = 0; + + if (brightness) { + lv5207lp_write(lv, LV5207LP_CTRL1, + LV5207LP_CPSW | LV5207LP_C10 | LV5207LP_CKSW); + lv5207lp_write(lv, LV5207LP_CTRL2, + LV5207LP_MSW | LV5207LP_MLED4 | + (brightness - 1)); + } else { + lv5207lp_write(lv, LV5207LP_CTRL1, 0); + lv5207lp_write(lv, LV5207LP_CTRL2, 0); + } + + return 0; +} + +static int lv5207lp_backlight_get_brightness(struct backlight_device *backlight) +{ + return backlight->props.brightness; +} + +static int lv5207lp_backlight_check_fb(struct backlight_device *backlight, + struct fb_info *info) +{ + struct lv5207lp *lv = bl_get_data(backlight); + + return lv->pdata->fbdev == NULL || lv->pdata->fbdev == info->dev; +} + +static const struct backlight_ops lv5207lp_backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = lv5207lp_backlight_update_status, + .get_brightness = lv5207lp_backlight_get_brightness, + .check_fb = lv5207lp_backlight_check_fb, +}; + +static int lv5207lp_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct lv5207lp_platform_data *pdata = client->dev.platform_data; + struct backlight_device *backlight; + struct backlight_properties props; + struct lv5207lp *lv; + + if (pdata == NULL) { + dev_err(&client->dev, "No platform data supplied\n"); + return -EINVAL; + } + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA)) { + dev_warn(&client->dev, + "I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n"); + return -EIO; + } + + lv = devm_kzalloc(&client->dev, sizeof(*lv), GFP_KERNEL); + if (!lv) + return -ENOMEM; + + lv->client = client; + lv->pdata = pdata; + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_RAW; + props.max_brightness = min_t(unsigned int, pdata->max_value, + LV5207LP_MAX_BRIGHTNESS); + props.brightness = clamp_t(unsigned int, pdata->def_value, 0, + props.max_brightness); + + backlight = backlight_device_register(dev_name(&client->dev), + &lv->client->dev, lv, + &lv5207lp_backlight_ops, &props); + if (IS_ERR(backlight)) { + dev_err(&client->dev, "failed to register backlight\n"); + return PTR_ERR(backlight); + } + + backlight_update_status(backlight); + i2c_set_clientdata(client, backlight); + + return 0; +} + +static int lv5207lp_remove(struct i2c_client *client) +{ + struct backlight_device *backlight = i2c_get_clientdata(client); + + backlight->props.brightness = 0; + backlight_update_status(backlight); + backlight_device_unregister(backlight); + + return 0; +} + +static const struct i2c_device_id lv5207lp_ids[] = { + { "lv5207lp", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, lv5207lp_ids); + +static struct i2c_driver lv5207lp_driver = { + .driver = { + .name = "lv5207lp", + }, + .probe = lv5207lp_probe, + .remove = lv5207lp_remove, + .id_table = lv5207lp_ids, +}; + +module_i2c_driver(lv5207lp_driver); + +MODULE_DESCRIPTION("Sanyo LV5207LP Backlight Driver"); +MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/platform_data/bd6107.h b/include/linux/platform_data/bd6107.h new file mode 100644 index 000000000000..671d6502d241 --- /dev/null +++ b/include/linux/platform_data/bd6107.h @@ -0,0 +1,19 @@ +/* + * bd6107.h - Rohm BD6107 LEDs Driver + * + * 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. + */ +#ifndef __BD6107_H__ +#define __BD6107_H__ + +struct device; + +struct bd6107_platform_data { + struct device *fbdev; + int reset; /* Reset GPIO */ + unsigned int def_value; +}; + +#endif diff --git a/include/linux/platform_data/gpio_backlight.h b/include/linux/platform_data/gpio_backlight.h new file mode 100644 index 000000000000..5ae0d9c80d4d --- /dev/null +++ b/include/linux/platform_data/gpio_backlight.h @@ -0,0 +1,21 @@ +/* + * gpio_backlight.h - Simple GPIO-controlled backlight + * + * 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. + */ +#ifndef __GPIO_BACKLIGHT_H__ +#define __GPIO_BACKLIGHT_H__ + +struct device; + +struct gpio_backlight_platform_data { + struct device *fbdev; + int gpio; + int def_value; + bool active_low; + const char *name; +}; + +#endif diff --git a/include/linux/platform_data/lv5207lp.h b/include/linux/platform_data/lv5207lp.h new file mode 100644 index 000000000000..7dc4d9a219a6 --- /dev/null +++ b/include/linux/platform_data/lv5207lp.h @@ -0,0 +1,19 @@ +/* + * lv5207lp.h - Sanyo LV5207LP LEDs Driver + * + * 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. + */ +#ifndef __LV5207LP_H__ +#define __LV5207LP_H__ + +struct device; + +struct lv5207lp_platform_data { + struct device *fbdev; + unsigned int max_value; + unsigned int def_value; +}; + +#endif |