diff options
Diffstat (limited to 'target/linux/s3c24xx/patches/0137-s3c24xx-pwm-platform-driver.patch.patch')
| -rwxr-xr-x | target/linux/s3c24xx/patches/0137-s3c24xx-pwm-platform-driver.patch.patch | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches/0137-s3c24xx-pwm-platform-driver.patch.patch b/target/linux/s3c24xx/patches/0137-s3c24xx-pwm-platform-driver.patch.patch new file mode 100755 index 0000000000..e4cb87b67c --- /dev/null +++ b/target/linux/s3c24xx/patches/0137-s3c24xx-pwm-platform-driver.patch.patch @@ -0,0 +1,127 @@ +From 6563c08a68d30e3b53b6a3a2b1916b129f4afc68 Mon Sep 17 00:00:00 2001 +From: matt_hsu <matt_hsu@openmoko.org> +Date: Fri, 25 Jul 2008 23:06:08 +0100 +Subject: [PATCH] s3c24xx-pwm-platform-driver.patch + +This patch is to register pwm as platform driver to keep the PWM-related +config when system is in suspend/resume. This could fix the following +issue after resume: + +- HDQ read timeout +- LEDs blinked abnormally(if LEDs is driven by PWM) + +Signed-off-by: Matt Hsu <matt_hsu@openmoko.org> +--- + arch/arm/mach-s3c2410/pwm.c | 63 ++++++++++++++++++++++++++++++++++++ + arch/arm/mach-s3c2440/mach-gta02.c | 6 +++ + 2 files changed, 69 insertions(+), 0 deletions(-) + +diff --git a/arch/arm/mach-s3c2410/pwm.c b/arch/arm/mach-s3c2410/pwm.c +index 23738c1..86a4faa 100644 +--- a/arch/arm/mach-s3c2410/pwm.c ++++ b/arch/arm/mach-s3c2410/pwm.c +@@ -20,10 +20,17 @@ + #include <linux/kernel.h> + #include <linux/init.h> + #include <linux/clk.h> ++#include <linux/device.h> + #include <asm/hardware.h> + #include <asm/plat-s3c/regs-timer.h> + #include <asm/arch/pwm.h> + ++#ifdef CONFIG_PM ++ static unsigned long standby_reg_tcon; ++ static unsigned long standby_reg_tcfg0; ++ static unsigned long standby_reg_tcfg1; ++#endif ++ + int s3c2410_pwm_disable(struct s3c2410_pwm *pwm) + { + unsigned long tcon; +@@ -212,3 +219,59 @@ int s3c2410_pwm_dumpregs(void) + return 0; + } + EXPORT_SYMBOL_GPL(s3c2410_pwm_dumpregs); ++ ++static int __init s3c24xx_pwm_probe(struct platform_device *pdev) ++{ ++ dev_info(&pdev->dev, "s3c24xx_pwm is registered \n"); ++ ++ return 0; ++} ++ ++#ifdef CONFIG_PM ++static int s3c24xx_pwm_suspend(struct platform_device *pdev, pm_message_t state) ++{ ++ /* PWM config should be kept in suspending */ ++ standby_reg_tcon = __raw_readl(S3C2410_TCON); ++ standby_reg_tcfg0 = __raw_readl(S3C2410_TCFG0); ++ standby_reg_tcfg1 = __raw_readl(S3C2410_TCFG1); ++ ++ return 0; ++} ++ ++static int s3c24xx_pwm_resume(struct platform_device *pdev) ++{ ++ __raw_writel(standby_reg_tcon, S3C2410_TCON); ++ __raw_writel(standby_reg_tcfg0, S3C2410_TCFG0); ++ __raw_writel(standby_reg_tcfg1, S3C2410_TCFG1); ++ ++ return 0; ++} ++#else ++#define sc32440_pwm_suspend NULL ++#define sc32440_pwm_resume NULL ++#endif ++ ++static struct platform_driver s3c24xx_pwm_driver = { ++ .driver = { ++ .name = "s3c24xx_pwm", ++ .owner = THIS_MODULE, ++ }, ++ .probe = s3c24xx_pwm_probe, ++ .suspend = s3c24xx_pwm_suspend, ++ .resume = s3c24xx_pwm_resume, ++}; ++ ++static int __init s3c24xx_pwm_init(void) ++{ ++ return platform_driver_register(&s3c24xx_pwm_driver); ++} ++ ++static void __exit s3c24xx_pwm_exit(void) ++{ ++} ++ ++MODULE_AUTHOR("Javi Roman <javiroman@kernel-labs.org>"); ++MODULE_LICENSE("GPL"); ++ ++module_init(s3c24xx_pwm_init); ++module_exit(s3c24xx_pwm_exit); +diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c +index 27babc9..1954121 100644 +--- a/arch/arm/mach-s3c2440/mach-gta02.c ++++ b/arch/arm/mach-s3c2440/mach-gta02.c +@@ -719,6 +719,11 @@ static struct platform_device gta02_sdio_dev = { + .num_resources = ARRAY_SIZE(gta02_sdio_resources), + }; + ++struct platform_device s3c24xx_pwm_device = { ++ .name = "s3c24xx_pwm", ++ .num_resources = 0, ++}; ++ + static struct platform_device *gta02_devices[] __initdata = { + &s3c_device_usb, + &s3c_device_wdt, +@@ -731,6 +736,7 @@ static struct platform_device *gta02_devices[] __initdata = { + >a02_nor_flash, + &sc32440_fiq_device, + >a02_version_device, ++ &s3c24xx_pwm_device, + }; + + static struct s3c2410_nand_set gta02_nand_sets[] = { +-- +1.5.6.3 + |