diff options
Diffstat (limited to 'recipes-kernel/linux/linux-yocto-dev/h3600/0004-fb-backlight-add-driver-for-iPAQ-micro-backlight.patch')
| -rw-r--r-- | recipes-kernel/linux/linux-yocto-dev/h3600/0004-fb-backlight-add-driver-for-iPAQ-micro-backlight.patch | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/recipes-kernel/linux/linux-yocto-dev/h3600/0004-fb-backlight-add-driver-for-iPAQ-micro-backlight.patch b/recipes-kernel/linux/linux-yocto-dev/h3600/0004-fb-backlight-add-driver-for-iPAQ-micro-backlight.patch new file mode 100644 index 0000000..2c81a9b --- /dev/null +++ b/recipes-kernel/linux/linux-yocto-dev/h3600/0004-fb-backlight-add-driver-for-iPAQ-micro-backlight.patch @@ -0,0 +1,147 @@ +From 2444e6fcd6c313e3cfdee58d692fe88a4bbc8fb8 Mon Sep 17 00:00:00 2001 +From: Linus Walleij <linus.walleij@linaro.org> +Date: Fri, 8 Nov 2013 10:09:13 +0100 +Subject: [PATCH 4/7] fb: backlight: add driver for iPAQ micro backlight + +This adds a driver for the backlight controlled by the microcontroller +on the Compaq iPAQ series of handheld computers: h3100, h3600 +and h3700. + +Signed-off-by: Linus Walleij <linus.walleij@linaro.org> +--- + drivers/video/backlight/Kconfig | 9 ++++ + drivers/video/backlight/Makefile | 1 + + drivers/video/backlight/ipaq_micro_bl.c | 89 +++++++++++++++++++++++++++++++++ + 3 files changed, 99 insertions(+) + create mode 100644 drivers/video/backlight/ipaq_micro_bl.c + +diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig +index 5a3eb2ecb525..ed2d61062907 100644 +--- a/drivers/video/backlight/Kconfig ++++ b/drivers/video/backlight/Kconfig +@@ -207,6 +207,15 @@ config BACKLIGHT_GENERIC + known as the Corgi backlight driver. If you have a Sharp Zaurus + SL-C7xx, SL-Cxx00 or SL-6000x say y. + ++config BACKLIGHT_IPAQ_MICRO ++ tristate "iPAQ microcontroller backlight driver" ++ depends on MFD_IPAQ_MICRO ++ default y ++ help ++ Say y to enable the backlight driver for Compaq iPAQ handheld ++ computers. Say yes if you have one of the h3100/h3600/h3700 ++ machines. ++ + config BACKLIGHT_LM3533 + tristate "Backlight Driver for LM3533" + depends on BACKLIGHT_CLASS_DEVICE +diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile +index bb820024f346..a9ea34a39cad 100644 +--- a/drivers/video/backlight/Makefile ++++ b/drivers/video/backlight/Makefile +@@ -36,6 +36,7 @@ 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-$(CONFIG_BACKLIGHT_IPAQ_MICRO) += ipaq_micro_bl.o + obj-$(CONFIG_BACKLIGHT_LM3533) += lm3533_bl.o + obj-$(CONFIG_BACKLIGHT_LM3630A) += lm3630a_bl.o + obj-$(CONFIG_BACKLIGHT_LM3639) += lm3639_bl.o +diff --git a/drivers/video/backlight/ipaq_micro_bl.c b/drivers/video/backlight/ipaq_micro_bl.c +new file mode 100644 +index 000000000000..b7ec8c453b61 +--- /dev/null ++++ b/drivers/video/backlight/ipaq_micro_bl.c +@@ -0,0 +1,89 @@ ++/* ++ * 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. ++ * ++ * iPAQ microcontroller backlight support ++ * Author : Linus Walleij <linus.walleij@linaro.org> ++ */ ++ ++#include <linux/module.h> ++#include <linux/init.h> ++#include <linux/platform_device.h> ++#include <linux/backlight.h> ++#include <linux/mfd/ipaq-micro.h> ++#include <linux/fb.h> ++#include <linux/err.h> ++ ++static int micro_bl_update_status(struct backlight_device *bd) ++{ ++ struct ipaq_micro *micro = dev_get_drvdata(&bd->dev); ++ int intensity = bd->props.brightness; ++ struct ipaq_micro_msg msg = { ++ .id = MSG_BACKLIGHT, ++ .tx_len = 3, ++ }; ++ ++ if (bd->props.power != FB_BLANK_UNBLANK) ++ intensity = 0; ++ if (bd->props.state & BL_CORE_FBBLANK) ++ intensity = 0; ++ if (bd->props.state & BL_CORE_SUSPENDED) ++ intensity = 0; ++ ++ msg.tx_data[0] = 0x01; ++ msg.tx_data[1] = intensity > 0 ? 1 : 0; ++ msg.tx_data[2] = intensity; ++ return ipaq_micro_tx_msg_sync(micro, &msg); ++} ++ ++static const struct backlight_ops micro_bl_ops = { ++ .options = BL_CORE_SUSPENDRESUME, ++ .update_status = micro_bl_update_status, ++}; ++ ++static struct backlight_properties micro_bl_props = { ++ .type = BACKLIGHT_RAW, ++ .max_brightness = 255, ++ .power = FB_BLANK_UNBLANK, ++ .brightness = 64, ++}; ++ ++static int micro_backlight_probe(struct platform_device *pdev) ++{ ++ struct backlight_device *bd; ++ struct ipaq_micro *micro = dev_get_drvdata(pdev->dev.parent); ++ ++ bd = devm_backlight_device_register( ++ &pdev->dev, ++ "ipaq-micro-backlight", ++ &pdev->dev, ++ micro, ++ µ_bl_ops, ++ µ_bl_props); ++ if (IS_ERR(bd)) ++ return PTR_ERR(bd); ++ platform_set_drvdata(pdev, bd); ++ backlight_update_status(bd); ++ dev_info(&pdev->dev, "iPAQ micro backlight driver\n"); ++ ++ return 0; ++} ++ ++static int micro_backlight_remove(struct platform_device *pdev) ++{ ++ return 0; ++} ++ ++struct platform_driver micro_backlight_device_driver = { ++ .driver = { ++ .name = "ipaq-micro-backlight", ++ }, ++ .probe = micro_backlight_probe, ++ .remove = micro_backlight_remove, ++}; ++module_platform_driver(micro_backlight_device_driver); ++ ++MODULE_LICENSE("GPL"); ++MODULE_DESCRIPTION("driver for iPAQ Atmel micro backlight"); ++MODULE_ALIAS("platform:ipaq-micro-backlight"); +-- +1.9.0 + |