diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-06 16:34:43 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-06 16:34:43 -0400 |
commit | 44598f98b98e54beca34dc836b38eaea40be1abf (patch) | |
tree | 42a498e0267b23289ffe240907fd9bacb9156a2c /drivers/video | |
parent | b4b50fd78b1e31989940dfc647e64453d0f7176a (diff) | |
parent | 4e5f67fa538ded704c904157e3ca23ceef9c7e64 (diff) |
Merge tag 'boards-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC board updates from Olof Johansson:
"Board updates for 3.12. Again, a bit of domain overlap with SoC and
DT branches, but most of this is around legacy code and board support.
We've found that platform maintainers have a hard time separating all
of these out and might move towards fewer branches for next release.
- Removal of a number of Marvell Kirkwood board files, since contents
is now common and mostly configured via DT.
- Device-tree updates for Marvell Dove, including irqchip and
clocksource setup.
- Defconfig updates. Gotta go somewhere. One new one for Renesas
Lager.
- New backlight drivers for backlights used on Renesas shmobile
platforms.
- Removal of Renesas leds driver.
- Shuffling of some of the new Broadcom platforms to give room for
others in the same mach directory. More in 3.13"
* tag 'boards-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (67 commits)
mmc: sdhci-bcm-kona: Staticize sdhci_bcm_kona_card_event
mmc: sdhci-bcm-kona: Remove unneeded version.h inclusion
ARM: bcm: Make secure API call optional
ARM: DT: binding fixup to align with vendor-prefixes.txt (drivers)
ARM: mmc: fix NONREMOVABLE test in sdhci-bcm-kona
ARM: bcm: Rename board_bcm
mmc: sdhci-bcm-kona: make linker-section warning go away
ARM: tegra: defconfig updates
ARM: dove: add initial DT file for Globalscale D2Plug
ARM: dove: add GPIO IR receiver node to SolidRun CuBox
ARM: dove: add common pinmux functions to DT
ARM: dove: add cpu device tree node
ARM: dove: update dove_defconfig with SI5351, PCI, and xHCI
arch/arm/mach-kirkwood: Avoid using ARRAY_AND_SIZE(e) as a function argument
ARM: kirkwood: fix DT building and update defconfig
ARM: kirkwood: Remove all remaining trace of DNS-320/325 platform code
ARM: configs: disable DEBUG_LL in bcm_defconfig
ARM: bcm281xx: Board specific reboot code
ARM bcm281xx: Turn on socket & network support.
ARM: bcm281xx: Turn on L2 cache.
...
Diffstat (limited to 'drivers/video')
-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 |
5 files changed, 539 insertions, 0 deletions
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 | |||
425 | If you have an Austrian Microsystems AS3711 say Y to enable the | 425 | If you have an Austrian Microsystems AS3711 say Y to enable the |
426 | backlight driver. | 426 | backlight driver. |
427 | 427 | ||
428 | config BACKLIGHT_GPIO | ||
429 | tristate "Generic GPIO based Backlight Driver" | ||
430 | depends on GPIOLIB | ||
431 | help | ||
432 | If you have a LCD backlight adjustable by GPIO, say Y to enable | ||
433 | this driver. | ||
434 | |||
435 | config BACKLIGHT_LV5207LP | ||
436 | tristate "Sanyo LV5207LP Backlight" | ||
437 | depends on I2C | ||
438 | help | ||
439 | If you have a Sanyo LV5207LP say Y to enable the backlight driver. | ||
440 | |||
441 | config BACKLIGHT_BD6107 | ||
442 | tristate "Rohm BD6107 Backlight" | ||
443 | depends on I2C | ||
444 | help | ||
445 | If you have a Rohm BD6107 say Y to enable the backlight driver. | ||
446 | |||
428 | endif # BACKLIGHT_CLASS_DEVICE | 447 | endif # BACKLIGHT_CLASS_DEVICE |
429 | 448 | ||
430 | endif # BACKLIGHT_LCD_SUPPORT | 449 | 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-$(CONFIG_BACKLIGHT_ADP8870) += adp8870_bl.o | |||
26 | obj-$(CONFIG_BACKLIGHT_APPLE) += apple_bl.o | 26 | obj-$(CONFIG_BACKLIGHT_APPLE) += apple_bl.o |
27 | obj-$(CONFIG_BACKLIGHT_AS3711) += as3711_bl.o | 27 | obj-$(CONFIG_BACKLIGHT_AS3711) += as3711_bl.o |
28 | obj-$(CONFIG_BACKLIGHT_ATMEL_PWM) += atmel-pwm-bl.o | 28 | obj-$(CONFIG_BACKLIGHT_ATMEL_PWM) += atmel-pwm-bl.o |
29 | obj-$(CONFIG_BACKLIGHT_BD6107) += bd6107.o | ||
29 | obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o | 30 | obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o |
30 | obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o | 31 | obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o |
31 | obj-$(CONFIG_BACKLIGHT_DA903X) += da903x_bl.o | 32 | obj-$(CONFIG_BACKLIGHT_DA903X) += da903x_bl.o |
32 | obj-$(CONFIG_BACKLIGHT_DA9052) += da9052_bl.o | 33 | obj-$(CONFIG_BACKLIGHT_DA9052) += da9052_bl.o |
33 | obj-$(CONFIG_BACKLIGHT_EP93XX) += ep93xx_bl.o | 34 | obj-$(CONFIG_BACKLIGHT_EP93XX) += ep93xx_bl.o |
34 | obj-$(CONFIG_BACKLIGHT_GENERIC) += generic_bl.o | 35 | obj-$(CONFIG_BACKLIGHT_GENERIC) += generic_bl.o |
36 | obj-$(CONFIG_BACKLIGHT_GPIO) += gpio_backlight.o | ||
35 | obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o | 37 | obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o |
36 | obj-$(CONFIG_BACKLIGHT_HP700) += jornada720_bl.o | 38 | obj-$(CONFIG_BACKLIGHT_HP700) += jornada720_bl.o |
37 | obj-$(CONFIG_BACKLIGHT_LM3533) += lm3533_bl.o | 39 | obj-$(CONFIG_BACKLIGHT_LM3533) += lm3533_bl.o |
@@ -40,6 +42,7 @@ obj-$(CONFIG_BACKLIGHT_LM3639) += lm3639_bl.o | |||
40 | obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o | 42 | obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o |
41 | obj-$(CONFIG_BACKLIGHT_LP855X) += lp855x_bl.o | 43 | obj-$(CONFIG_BACKLIGHT_LP855X) += lp855x_bl.o |
42 | obj-$(CONFIG_BACKLIGHT_LP8788) += lp8788_bl.o | 44 | obj-$(CONFIG_BACKLIGHT_LP8788) += lp8788_bl.o |
45 | obj-$(CONFIG_BACKLIGHT_LV5207LP) += lv5207lp.o | ||
43 | obj-$(CONFIG_BACKLIGHT_MAX8925) += max8925_bl.o | 46 | obj-$(CONFIG_BACKLIGHT_MAX8925) += max8925_bl.o |
44 | obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o | 47 | obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o |
45 | obj-$(CONFIG_BACKLIGHT_OT200) += ot200_bl.o | 48 | 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 @@ | |||
1 | /* | ||
2 | * ROHM Semiconductor BD6107 LED Driver | ||
3 | * | ||
4 | * Copyright (C) 2013 Ideas on board SPRL | ||
5 | * | ||
6 | * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com> | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify | ||
9 | * it under the terms of the GNU General Public License version 2 as | ||
10 | * published by the Free Software Foundation. | ||
11 | */ | ||
12 | |||
13 | #include <linux/backlight.h> | ||
14 | #include <linux/delay.h> | ||
15 | #include <linux/err.h> | ||
16 | #include <linux/fb.h> | ||
17 | #include <linux/gpio.h> | ||
18 | #include <linux/i2c.h> | ||
19 | #include <linux/module.h> | ||
20 | #include <linux/platform_data/bd6107.h> | ||
21 | #include <linux/slab.h> | ||
22 | |||
23 | #define BD6107_PSCNT1 0x00 | ||
24 | #define BD6107_PSCNT1_PSCNTREG2 (1 << 2) | ||
25 | #define BD6107_PSCNT1_PSCNTREG1 (1 << 0) | ||
26 | #define BD6107_REGVSET 0x02 | ||
27 | #define BD6107_REGVSET_REG1VSET_2_85V (1 << 2) | ||
28 | #define BD6107_REGVSET_REG1VSET_2_80V (0 << 2) | ||
29 | #define BD6107_LEDCNT1 0x03 | ||
30 | #define BD6107_LEDCNT1_LEDONOFF2 (1 << 1) | ||
31 | #define BD6107_LEDCNT1_LEDONOFF1 (1 << 0) | ||
32 | #define BD6107_PORTSEL 0x04 | ||
33 | #define BD6107_PORTSEL_LEDM(n) (1 << (n)) | ||
34 | #define BD6107_RGB1CNT1 0x05 | ||
35 | #define BD6107_RGB1CNT2 0x06 | ||
36 | #define BD6107_RGB1CNT3 0x07 | ||
37 | #define BD6107_RGB1CNT4 0x08 | ||
38 | #define BD6107_RGB1CNT5 0x09 | ||
39 | #define BD6107_RGB1FLM 0x0a | ||
40 | #define BD6107_RGB2CNT1 0x0b | ||
41 | #define BD6107_RGB2CNT2 0x0c | ||
42 | #define BD6107_RGB2CNT3 0x0d | ||
43 | #define BD6107_RGB2CNT4 0x0e | ||
44 | #define BD6107_RGB2CNT5 0x0f | ||
45 | #define BD6107_RGB2FLM 0x10 | ||
46 | #define BD6107_PSCONT3 0x11 | ||
47 | #define BD6107_SMMONCNT 0x12 | ||
48 | #define BD6107_DCDCCNT 0x13 | ||
49 | #define BD6107_IOSEL 0x14 | ||
50 | #define BD6107_OUT1 0x15 | ||
51 | #define BD6107_OUT2 0x16 | ||
52 | #define BD6107_MASK1 0x17 | ||
53 | #define BD6107_MASK2 0x18 | ||
54 | #define BD6107_FACTOR1 0x19 | ||
55 | #define BD6107_FACTOR2 0x1a | ||
56 | #define BD6107_CLRFACT1 0x1b | ||
57 | #define BD6107_CLRFACT2 0x1c | ||
58 | #define BD6107_STATE1 0x1d | ||
59 | #define BD6107_LSIVER 0x1e | ||
60 | #define BD6107_GRPSEL 0x1f | ||
61 | #define BD6107_LEDCNT2 0x20 | ||
62 | #define BD6107_LEDCNT3 0x21 | ||
63 | #define BD6107_MCURRENT 0x22 | ||
64 | #define BD6107_MAINCNT1 0x23 | ||
65 | #define BD6107_MAINCNT2 0x24 | ||
66 | #define BD6107_SLOPECNT 0x25 | ||
67 | #define BD6107_MSLOPE 0x26 | ||
68 | #define BD6107_RGBSLOPE 0x27 | ||
69 | #define BD6107_TEST 0x29 | ||
70 | #define BD6107_SFTRST 0x2a | ||
71 | #define BD6107_SFTRSTGD 0x2b | ||
72 | |||
73 | struct bd6107 { | ||
74 | struct i2c_client *client; | ||
75 | struct backlight_device *backlight; | ||
76 | struct bd6107_platform_data *pdata; | ||
77 | }; | ||
78 | |||
79 | static int bd6107_write(struct bd6107 *bd, u8 reg, u8 data) | ||
80 | { | ||
81 | return i2c_smbus_write_byte_data(bd->client, reg, data); | ||
82 | } | ||
83 | |||
84 | static int bd6107_backlight_update_status(struct backlight_device *backlight) | ||
85 | { | ||
86 | struct bd6107 *bd = bl_get_data(backlight); | ||
87 | int brightness = backlight->props.brightness; | ||
88 | |||
89 | if (backlight->props.power != FB_BLANK_UNBLANK || | ||
90 | backlight->props.fb_blank != FB_BLANK_UNBLANK || | ||
91 | backlight->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) | ||
92 | brightness = 0; | ||
93 | |||
94 | if (brightness) { | ||
95 | bd6107_write(bd, BD6107_PORTSEL, BD6107_PORTSEL_LEDM(2) | | ||
96 | BD6107_PORTSEL_LEDM(1) | BD6107_PORTSEL_LEDM(0)); | ||
97 | bd6107_write(bd, BD6107_MAINCNT1, brightness); | ||
98 | bd6107_write(bd, BD6107_LEDCNT1, BD6107_LEDCNT1_LEDONOFF1); | ||
99 | } else { | ||
100 | gpio_set_value(bd->pdata->reset, 0); | ||
101 | msleep(24); | ||
102 | gpio_set_value(bd->pdata->reset, 1); | ||
103 | } | ||
104 | |||
105 | return 0; | ||
106 | } | ||
107 | |||
108 | static int bd6107_backlight_get_brightness(struct backlight_device *backlight) | ||
109 | { | ||
110 | return backlight->props.brightness; | ||
111 | } | ||
112 | |||
113 | static int bd6107_backlight_check_fb(struct backlight_device *backlight, | ||
114 | struct fb_info *info) | ||
115 | { | ||
116 | struct bd6107 *bd = bl_get_data(backlight); | ||
117 | |||
118 | return bd->pdata->fbdev == NULL || bd->pdata->fbdev == info->dev; | ||
119 | } | ||
120 | |||
121 | static const struct backlight_ops bd6107_backlight_ops = { | ||
122 | .options = BL_CORE_SUSPENDRESUME, | ||
123 | .update_status = bd6107_backlight_update_status, | ||
124 | .get_brightness = bd6107_backlight_get_brightness, | ||
125 | .check_fb = bd6107_backlight_check_fb, | ||
126 | }; | ||
127 | |||
128 | static int bd6107_probe(struct i2c_client *client, | ||
129 | const struct i2c_device_id *id) | ||
130 | { | ||
131 | struct bd6107_platform_data *pdata = client->dev.platform_data; | ||
132 | struct backlight_device *backlight; | ||
133 | struct backlight_properties props; | ||
134 | struct bd6107 *bd; | ||
135 | int ret; | ||
136 | |||
137 | if (pdata == NULL || !pdata->reset) { | ||
138 | dev_err(&client->dev, "No reset GPIO in platform data\n"); | ||
139 | return -EINVAL; | ||
140 | } | ||
141 | |||
142 | if (!i2c_check_functionality(client->adapter, | ||
143 | I2C_FUNC_SMBUS_BYTE_DATA)) { | ||
144 | dev_warn(&client->dev, | ||
145 | "I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n"); | ||
146 | return -EIO; | ||
147 | } | ||
148 | |||
149 | bd = devm_kzalloc(&client->dev, sizeof(*bd), GFP_KERNEL); | ||
150 | if (!bd) | ||
151 | return -ENOMEM; | ||
152 | |||
153 | bd->client = client; | ||
154 | bd->pdata = pdata; | ||
155 | |||
156 | ret = devm_gpio_request_one(&client->dev, pdata->reset, | ||
157 | GPIOF_DIR_OUT | GPIOF_INIT_LOW, "reset"); | ||
158 | if (ret < 0) { | ||
159 | dev_err(&client->dev, "unable to request reset GPIO\n"); | ||
160 | return ret; | ||
161 | } | ||
162 | |||
163 | memset(&props, 0, sizeof(props)); | ||
164 | props.type = BACKLIGHT_RAW; | ||
165 | props.max_brightness = 128; | ||
166 | props.brightness = clamp_t(unsigned int, pdata->def_value, 0, | ||
167 | props.max_brightness); | ||
168 | |||
169 | backlight = backlight_device_register(dev_name(&client->dev), | ||
170 | &bd->client->dev, bd, | ||
171 | &bd6107_backlight_ops, &props); | ||
172 | if (IS_ERR(backlight)) { | ||
173 | dev_err(&client->dev, "failed to register backlight\n"); | ||
174 | return PTR_ERR(backlight); | ||
175 | } | ||
176 | |||
177 | backlight_update_status(backlight); | ||
178 | i2c_set_clientdata(client, backlight); | ||
179 | |||
180 | return 0; | ||
181 | } | ||
182 | |||
183 | static int bd6107_remove(struct i2c_client *client) | ||
184 | { | ||
185 | struct backlight_device *backlight = i2c_get_clientdata(client); | ||
186 | |||
187 | backlight->props.brightness = 0; | ||
188 | backlight_update_status(backlight); | ||
189 | backlight_device_unregister(backlight); | ||
190 | |||
191 | return 0; | ||
192 | } | ||
193 | |||
194 | static const struct i2c_device_id bd6107_ids[] = { | ||
195 | { "bd6107", 0 }, | ||
196 | { } | ||
197 | }; | ||
198 | MODULE_DEVICE_TABLE(i2c, bd6107_ids); | ||
199 | |||
200 | static struct i2c_driver bd6107_driver = { | ||
201 | .driver = { | ||
202 | .name = "bd6107", | ||
203 | }, | ||
204 | .probe = bd6107_probe, | ||
205 | .remove = bd6107_remove, | ||
206 | .id_table = bd6107_ids, | ||
207 | }; | ||
208 | |||
209 | module_i2c_driver(bd6107_driver); | ||
210 | |||
211 | MODULE_DESCRIPTION("Rohm BD6107 Backlight Driver"); | ||
212 | MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); | ||
213 | 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 @@ | |||
1 | /* | ||
2 | * gpio_backlight.c - Simple GPIO-controlled backlight | ||
3 | * | ||
4 | * This program is free software; you can redistribute it and/or modify | ||
5 | * it under the terms of the GNU General Public License version 2 as | ||
6 | * published by the Free Software Foundation. | ||
7 | */ | ||
8 | |||
9 | #include <linux/backlight.h> | ||
10 | #include <linux/err.h> | ||
11 | #include <linux/fb.h> | ||
12 | #include <linux/gpio.h> | ||
13 | #include <linux/init.h> | ||
14 | #include <linux/kernel.h> | ||
15 | #include <linux/module.h> | ||
16 | #include <linux/platform_data/gpio_backlight.h> | ||
17 | #include <linux/platform_device.h> | ||
18 | #include <linux/slab.h> | ||
19 | |||
20 | struct gpio_backlight { | ||
21 | struct device *dev; | ||
22 | struct device *fbdev; | ||
23 | |||
24 | int gpio; | ||
25 | int active; | ||
26 | }; | ||
27 | |||
28 | static int gpio_backlight_update_status(struct backlight_device *bl) | ||
29 | { | ||
30 | struct gpio_backlight *gbl = bl_get_data(bl); | ||
31 | int brightness = bl->props.brightness; | ||
32 | |||
33 | if (bl->props.power != FB_BLANK_UNBLANK || | ||
34 | bl->props.fb_blank != FB_BLANK_UNBLANK || | ||
35 | bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) | ||
36 | brightness = 0; | ||
37 | |||
38 | gpio_set_value(gbl->gpio, brightness ? gbl->active : !gbl->active); | ||
39 | |||
40 | return 0; | ||
41 | } | ||
42 | |||
43 | static int gpio_backlight_get_brightness(struct backlight_device *bl) | ||
44 | { | ||
45 | return bl->props.brightness; | ||
46 | } | ||
47 | |||
48 | static int gpio_backlight_check_fb(struct backlight_device *bl, | ||
49 | struct fb_info *info) | ||
50 | { | ||
51 | struct gpio_backlight *gbl = bl_get_data(bl); | ||
52 | |||
53 | return gbl->fbdev == NULL || gbl->fbdev == info->dev; | ||
54 | } | ||
55 | |||
56 | static const struct backlight_ops gpio_backlight_ops = { | ||
57 | .options = BL_CORE_SUSPENDRESUME, | ||
58 | .update_status = gpio_backlight_update_status, | ||
59 | .get_brightness = gpio_backlight_get_brightness, | ||
60 | .check_fb = gpio_backlight_check_fb, | ||
61 | }; | ||
62 | |||
63 | static int gpio_backlight_probe(struct platform_device *pdev) | ||
64 | { | ||
65 | struct gpio_backlight_platform_data *pdata = pdev->dev.platform_data; | ||
66 | struct backlight_properties props; | ||
67 | struct backlight_device *bl; | ||
68 | struct gpio_backlight *gbl; | ||
69 | int ret; | ||
70 | |||
71 | if (!pdata) { | ||
72 | dev_err(&pdev->dev, "failed to find platform data\n"); | ||
73 | return -ENODEV; | ||
74 | } | ||
75 | |||
76 | gbl = devm_kzalloc(&pdev->dev, sizeof(*gbl), GFP_KERNEL); | ||
77 | if (gbl == NULL) | ||
78 | return -ENOMEM; | ||
79 | |||
80 | gbl->dev = &pdev->dev; | ||
81 | gbl->fbdev = pdata->fbdev; | ||
82 | gbl->gpio = pdata->gpio; | ||
83 | gbl->active = pdata->active_low ? 0 : 1; | ||
84 | |||
85 | ret = devm_gpio_request_one(gbl->dev, gbl->gpio, GPIOF_DIR_OUT | | ||
86 | (gbl->active ? GPIOF_INIT_LOW | ||
87 | : GPIOF_INIT_HIGH), | ||
88 | pdata->name); | ||
89 | if (ret < 0) { | ||
90 | dev_err(&pdev->dev, "unable to request GPIO\n"); | ||
91 | return ret; | ||
92 | } | ||
93 | |||
94 | memset(&props, 0, sizeof(props)); | ||
95 | props.type = BACKLIGHT_RAW; | ||
96 | props.max_brightness = 1; | ||
97 | bl = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, gbl, | ||
98 | &gpio_backlight_ops, &props); | ||
99 | if (IS_ERR(bl)) { | ||
100 | dev_err(&pdev->dev, "failed to register backlight\n"); | ||
101 | return PTR_ERR(bl); | ||
102 | } | ||
103 | |||
104 | bl->props.brightness = pdata->def_value; | ||
105 | backlight_update_status(bl); | ||
106 | |||
107 | platform_set_drvdata(pdev, bl); | ||
108 | return 0; | ||
109 | } | ||
110 | |||
111 | static int gpio_backlight_remove(struct platform_device *pdev) | ||
112 | { | ||
113 | struct backlight_device *bl = platform_get_drvdata(pdev); | ||
114 | |||
115 | backlight_device_unregister(bl); | ||
116 | return 0; | ||
117 | } | ||
118 | |||
119 | static struct platform_driver gpio_backlight_driver = { | ||
120 | .driver = { | ||
121 | .name = "gpio-backlight", | ||
122 | .owner = THIS_MODULE, | ||
123 | }, | ||
124 | .probe = gpio_backlight_probe, | ||
125 | .remove = gpio_backlight_remove, | ||
126 | }; | ||
127 | |||
128 | module_platform_driver(gpio_backlight_driver); | ||
129 | |||
130 | MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); | ||
131 | MODULE_DESCRIPTION("GPIO-based Backlight Driver"); | ||
132 | MODULE_LICENSE("GPL"); | ||
133 | 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 @@ | |||
1 | /* | ||
2 | * Sanyo LV5207LP LED Driver | ||
3 | * | ||
4 | * Copyright (C) 2013 Ideas on board SPRL | ||
5 | * | ||
6 | * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com> | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify | ||
9 | * it under the terms of the GNU General Public License version 2 as | ||
10 | * published by the Free Software Foundation. | ||
11 | */ | ||
12 | |||
13 | #include <linux/backlight.h> | ||
14 | #include <linux/err.h> | ||
15 | #include <linux/fb.h> | ||
16 | #include <linux/i2c.h> | ||
17 | #include <linux/module.h> | ||
18 | #include <linux/platform_data/lv5207lp.h> | ||
19 | #include <linux/slab.h> | ||
20 | |||
21 | #define LV5207LP_CTRL1 0x00 | ||
22 | #define LV5207LP_CPSW (1 << 7) | ||
23 | #define LV5207LP_SCTEN (1 << 6) | ||
24 | #define LV5207LP_C10 (1 << 5) | ||
25 | #define LV5207LP_CKSW (1 << 4) | ||
26 | #define LV5207LP_RSW (1 << 3) | ||
27 | #define LV5207LP_GSW (1 << 2) | ||
28 | #define LV5207LP_BSW (1 << 1) | ||
29 | #define LV5207LP_CTRL2 0x01 | ||
30 | #define LV5207LP_MSW (1 << 7) | ||
31 | #define LV5207LP_MLED4 (1 << 6) | ||
32 | #define LV5207LP_RED 0x02 | ||
33 | #define LV5207LP_GREEN 0x03 | ||
34 | #define LV5207LP_BLUE 0x04 | ||
35 | |||
36 | #define LV5207LP_MAX_BRIGHTNESS 32 | ||
37 | |||
38 | struct lv5207lp { | ||
39 | struct i2c_client *client; | ||
40 | struct backlight_device *backlight; | ||
41 | struct lv5207lp_platform_data *pdata; | ||
42 | }; | ||
43 | |||
44 | static int lv5207lp_write(struct lv5207lp *lv, u8 reg, u8 data) | ||
45 | { | ||
46 | return i2c_smbus_write_byte_data(lv->client, reg, data); | ||
47 | } | ||
48 | |||
49 | static int lv5207lp_backlight_update_status(struct backlight_device *backlight) | ||
50 | { | ||
51 | struct lv5207lp *lv = bl_get_data(backlight); | ||
52 | int brightness = backlight->props.brightness; | ||
53 | |||
54 | if (backlight->props.power != FB_BLANK_UNBLANK || | ||
55 | backlight->props.fb_blank != FB_BLANK_UNBLANK || | ||
56 | backlight->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) | ||
57 | brightness = 0; | ||
58 | |||
59 | if (brightness) { | ||
60 | lv5207lp_write(lv, LV5207LP_CTRL1, | ||
61 | LV5207LP_CPSW | LV5207LP_C10 | LV5207LP_CKSW); | ||
62 | lv5207lp_write(lv, LV5207LP_CTRL2, | ||
63 | LV5207LP_MSW | LV5207LP_MLED4 | | ||
64 | (brightness - 1)); | ||
65 | } else { | ||
66 | lv5207lp_write(lv, LV5207LP_CTRL1, 0); | ||
67 | lv5207lp_write(lv, LV5207LP_CTRL2, 0); | ||
68 | } | ||
69 | |||
70 | return 0; | ||
71 | } | ||
72 | |||
73 | static int lv5207lp_backlight_get_brightness(struct backlight_device *backlight) | ||
74 | { | ||
75 | return backlight->props.brightness; | ||
76 | } | ||
77 | |||
78 | static int lv5207lp_backlight_check_fb(struct backlight_device *backlight, | ||
79 | struct fb_info *info) | ||
80 | { | ||
81 | struct lv5207lp *lv = bl_get_data(backlight); | ||
82 | |||
83 | return lv->pdata->fbdev == NULL || lv->pdata->fbdev == info->dev; | ||
84 | } | ||
85 | |||
86 | static const struct backlight_ops lv5207lp_backlight_ops = { | ||
87 | .options = BL_CORE_SUSPENDRESUME, | ||
88 | .update_status = lv5207lp_backlight_update_status, | ||
89 | .get_brightness = lv5207lp_backlight_get_brightness, | ||
90 | .check_fb = lv5207lp_backlight_check_fb, | ||
91 | }; | ||
92 | |||
93 | static int lv5207lp_probe(struct i2c_client *client, | ||
94 | const struct i2c_device_id *id) | ||
95 | { | ||
96 | struct lv5207lp_platform_data *pdata = client->dev.platform_data; | ||
97 | struct backlight_device *backlight; | ||
98 | struct backlight_properties props; | ||
99 | struct lv5207lp *lv; | ||
100 | |||
101 | if (pdata == NULL) { | ||
102 | dev_err(&client->dev, "No platform data supplied\n"); | ||
103 | return -EINVAL; | ||
104 | } | ||
105 | |||
106 | if (!i2c_check_functionality(client->adapter, | ||
107 | I2C_FUNC_SMBUS_BYTE_DATA)) { | ||
108 | dev_warn(&client->dev, | ||
109 | "I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n"); | ||
110 | return -EIO; | ||
111 | } | ||
112 | |||
113 | lv = devm_kzalloc(&client->dev, sizeof(*lv), GFP_KERNEL); | ||
114 | if (!lv) | ||
115 | return -ENOMEM; | ||
116 | |||
117 | lv->client = client; | ||
118 | lv->pdata = pdata; | ||
119 | |||
120 | memset(&props, 0, sizeof(props)); | ||
121 | props.type = BACKLIGHT_RAW; | ||
122 | props.max_brightness = min_t(unsigned int, pdata->max_value, | ||
123 | LV5207LP_MAX_BRIGHTNESS); | ||
124 | props.brightness = clamp_t(unsigned int, pdata->def_value, 0, | ||
125 | props.max_brightness); | ||
126 | |||
127 | backlight = backlight_device_register(dev_name(&client->dev), | ||
128 | &lv->client->dev, lv, | ||
129 | &lv5207lp_backlight_ops, &props); | ||
130 | if (IS_ERR(backlight)) { | ||
131 | dev_err(&client->dev, "failed to register backlight\n"); | ||
132 | return PTR_ERR(backlight); | ||
133 | } | ||
134 | |||
135 | backlight_update_status(backlight); | ||
136 | i2c_set_clientdata(client, backlight); | ||
137 | |||
138 | return 0; | ||
139 | } | ||
140 | |||
141 | static int lv5207lp_remove(struct i2c_client *client) | ||
142 | { | ||
143 | struct backlight_device *backlight = i2c_get_clientdata(client); | ||
144 | |||
145 | backlight->props.brightness = 0; | ||
146 | backlight_update_status(backlight); | ||
147 | backlight_device_unregister(backlight); | ||
148 | |||
149 | return 0; | ||
150 | } | ||
151 | |||
152 | static const struct i2c_device_id lv5207lp_ids[] = { | ||
153 | { "lv5207lp", 0 }, | ||
154 | { } | ||
155 | }; | ||
156 | MODULE_DEVICE_TABLE(i2c, lv5207lp_ids); | ||
157 | |||
158 | static struct i2c_driver lv5207lp_driver = { | ||
159 | .driver = { | ||
160 | .name = "lv5207lp", | ||
161 | }, | ||
162 | .probe = lv5207lp_probe, | ||
163 | .remove = lv5207lp_remove, | ||
164 | .id_table = lv5207lp_ids, | ||
165 | }; | ||
166 | |||
167 | module_i2c_driver(lv5207lp_driver); | ||
168 | |||
169 | MODULE_DESCRIPTION("Sanyo LV5207LP Backlight Driver"); | ||
170 | MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>"); | ||
171 | MODULE_LICENSE("GPL"); | ||