diff options
Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.26/1090-fix-lis302dl-suspend-gpio.patch.patch')
| -rwxr-xr-x | target/linux/s3c24xx/patches-2.6.26/1090-fix-lis302dl-suspend-gpio.patch.patch | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.26/1090-fix-lis302dl-suspend-gpio.patch.patch b/target/linux/s3c24xx/patches-2.6.26/1090-fix-lis302dl-suspend-gpio.patch.patch deleted file mode 100755 index 9a9c6051..0000000 --- a/target/linux/s3c24xx/patches-2.6.26/1090-fix-lis302dl-suspend-gpio.patch.patch +++ /dev/null @@ -1,122 +0,0 @@ -From f97c81869175362f755488bd50ddf85570236ce8 Mon Sep 17 00:00:00 2001 -From: Andy Green <andy@openmoko.com> -Date: Fri, 25 Jul 2008 23:06:02 +0100 -Subject: [PATCH] fix-lis302dl-suspend-gpio.patch - Add platform stuff to deal with going in and out of suspend - so the motion sensor IO is not driving high into unpowered sensors - -Signed-off-by: Andy Green <andy@openmoko.com> ---- - arch/arm/mach-s3c2440/mach-gta02.c | 28 +++++++++++++++++++++++++++- - drivers/input/misc/lis302dl.c | 15 +++++++++++++++ - include/linux/lis302dl.h | 1 + - 3 files changed, 43 insertions(+), 1 deletions(-) - -diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c -index 5bd68a6..99206ee 100644 ---- a/arch/arm/mach-s3c2440/mach-gta02.c -+++ b/arch/arm/mach-s3c2440/mach-gta02.c -@@ -887,7 +887,31 @@ void gat02_lis302dl_bitbang_read(struct lis302dl_info *lis) - } - - --struct lis302dl_platform_data lis302_pdata[] = { -+void gat02_lis302dl_suspend_io(struct lis302dl_info *lis, int resume) -+{ -+ struct lis302dl_platform_data *pdata = lis->pdata; -+ -+ if (!resume) { -+ /* -+ * we don't want to power them with a high level -+ * because GSENSOR_3V3 is not up during suspend -+ */ -+ s3c2410_gpio_setpin(pdata->pin_chip_select, 0); -+ s3c2410_gpio_setpin(pdata->pin_clk, 0); -+ s3c2410_gpio_setpin(pdata->pin_mosi, 0); -+ /* misnomer: it is a pullDOWN in 2442 */ -+ s3c2410_gpio_pullup(pdata->pin_miso, 1); -+ return; -+ } -+ -+ /* back to normal */ -+ s3c2410_gpio_setpin(pdata->pin_chip_select, 1); -+ s3c2410_gpio_setpin(pdata->pin_clk, 1); -+ /* misnomer: it is a pullDOWN in 2442 */ -+ s3c2410_gpio_pullup(pdata->pin_miso, 0); -+} -+ -+const struct lis302dl_platform_data lis302_pdata[] = { - { - .name = "lis302-1 (top)", - .pin_chip_select= S3C2410_GPD12, -@@ -896,6 +920,7 @@ struct lis302dl_platform_data lis302_pdata[] = { - .pin_miso = S3C2410_GPG5, - .open_drain = 1, /* altered at runtime by PCB rev */ - .lis302dl_bitbang_read = gat02_lis302dl_bitbang_read, -+ .lis302dl_suspend_io = gat02_lis302dl_suspend_io, - }, { - .name = "lis302-2 (bottom)", - .pin_chip_select= S3C2410_GPD13, -@@ -904,6 +929,7 @@ struct lis302dl_platform_data lis302_pdata[] = { - .pin_miso = S3C2410_GPG5, - .open_drain = 1, /* altered at runtime by PCB rev */ - .lis302dl_bitbang_read = gat02_lis302dl_bitbang_read, -+ .lis302dl_suspend_io = gat02_lis302dl_suspend_io, - }, - }; - -diff --git a/drivers/input/misc/lis302dl.c b/drivers/input/misc/lis302dl.c -index 36bdcf7..2be816a 100644 ---- a/drivers/input/misc/lis302dl.c -+++ b/drivers/input/misc/lis302dl.c -@@ -428,6 +428,15 @@ static int lis302dl_suspend(struct spi_device *spi, pm_message_t state) - disable_irq(lis->spi_dev->irq); - local_save_flags(flags); - -+ /* -+ * When we share SPI over multiple sensors, there is a race here -+ * that one or more sensors will lose. In that case, the shared -+ * SPI bus GPIO will be in sleep mode and partially pulled down. So -+ * we explicitly put our IO into "wake" mode here before the final -+ * traffic to the sensor. -+ */ -+ (lis->pdata->lis302dl_suspend_io)(lis, 1); -+ - /* save registers */ - lis->regs[LIS302DL_REG_CTRL1] = reg_read(lis, LIS302DL_REG_CTRL1); - lis->regs[LIS302DL_REG_CTRL2] = reg_read(lis, LIS302DL_REG_CTRL2); -@@ -467,6 +476,9 @@ static int lis302dl_suspend(struct spi_device *spi, pm_message_t state) - reg_write(lis, LIS302DL_REG_CTRL1, tmp); - } - -+ /* place our IO to the device in sleep-compatible states */ -+ (lis->pdata->lis302dl_suspend_io)(lis, 0); -+ - local_irq_restore(flags); - - return 0; -@@ -479,6 +491,9 @@ static int lis302dl_resume(struct spi_device *spi) - - local_save_flags(flags); - -+ /* get our IO to the device back in operational states */ -+ (lis->pdata->lis302dl_suspend_io)(lis, 1); -+ - /* restore registers after resume */ - reg_write(lis, LIS302DL_REG_CTRL1, lis->regs[LIS302DL_REG_CTRL1]); - reg_write(lis, LIS302DL_REG_CTRL2, lis->regs[LIS302DL_REG_CTRL2]); -diff --git a/include/linux/lis302dl.h b/include/linux/lis302dl.h -index 2dea813..0d6b4c4 100644 ---- a/include/linux/lis302dl.h -+++ b/include/linux/lis302dl.h -@@ -16,6 +16,7 @@ struct lis302dl_platform_data { - unsigned long pin_miso; - int open_drain; - void (*lis302dl_bitbang_read)(struct lis302dl_info *); -+ void (*lis302dl_suspend_io)(struct lis302dl_info *, int resuming); - }; - - struct lis302dl_info { --- -1.5.6.3 - |