220 lines
6.9 KiB
Diff
220 lines
6.9 KiB
Diff
From 80b4a26a51a75a92ddbb64b342068b741ef88416 Mon Sep 17 00:00:00 2001
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From: Andy Green <andy@openmoko.com>
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Date: Wed, 2 Jul 2008 22:42:39 +0100
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Subject: [PATCH] fix-pcf50633-migrate-gta02-peripherals-out.patch
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pcf50633.c shouldn't know GTAxx at all. Move to using a
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platform callback to allow definition of platform devices
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with pcf50633 as parent device (good for enforcing suspend /
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resume ordering). Remove all code references to GTAxx from
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the sources (one string left for compatability).
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Signed-off-by: Andy Green <andy@openmoko.com>
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---
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arch/arm/mach-s3c2440/mach-gta02.c | 30 +++++++++++++++++++-
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drivers/i2c/chips/pcf50633.c | 54 ++++++++++++++++++-----------------
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include/linux/pcf50633.h | 9 +++++-
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3 files changed, 65 insertions(+), 28 deletions(-)
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diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
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index 309e484..fd746fd 100644
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--- a/arch/arm/mach-s3c2440/mach-gta02.c
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+++ b/arch/arm/mach-s3c2440/mach-gta02.c
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@@ -464,6 +464,29 @@ static int pmu_callback(struct device *dev, unsigned int feature,
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return 0;
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}
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+static struct platform_device gta01_pm_gps_dev = {
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+ .name = "neo1973-pm-gps",
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+};
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+
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+static struct platform_device gta01_pm_bt_dev = {
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+ .name = "neo1973-pm-bt",
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+};
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+
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+/* this is called when pc50633 is probed, unfortunately quite late in the
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+ * day since it is an I2C bus device. Here we can belatedly define some
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+ * platform devices with the advantage that we can mark the pcf50633 as the
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+ * parent. This makes them get suspended and resumed with their parent
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+ * the pcf50633 still around.
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+ */
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+
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+static void gta02_pcf50633_attach_child_devices(struct device *parent_device)
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+{
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+ gta01_pm_gps_dev.dev.parent = parent_device;
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+ gta01_pm_bt_dev.dev.parent = parent_device;
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+ platform_device_register(>a01_pm_bt_dev);
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+ platform_device_register(>a01_pm_gps_dev);
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+}
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+
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static struct pcf50633_platform_data gta02_pcf_pdata = {
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.used_features = PCF50633_FEAT_MBC |
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PCF50633_FEAT_BBC |
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@@ -478,6 +501,7 @@ static struct pcf50633_platform_data gta02_pcf_pdata = {
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.r_fix_batt = 10000,
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.r_fix_batt_par = 10000,
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.r_sense_milli = 220,
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+ .flag_use_apm_emulation = 0,
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.resumers = {
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[0] = PCF50633_INT1_USBINS |
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PCF50633_INT1_USBREM |
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@@ -577,7 +601,9 @@ static struct pcf50633_platform_data gta02_pcf_pdata = {
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},
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},
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.defer_resume_backlight = 1,
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- .resume_backlight_ramp_speed = 5
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+ .resume_backlight_ramp_speed = 5,
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+ .attach_child_devices = gta02_pcf50633_attach_child_devices
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+
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};
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#if 0 /* currently unused */
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@@ -772,6 +798,7 @@ struct platform_device s3c24xx_pwm_device = {
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.num_resources = 0,
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};
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+
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static struct platform_device *gta02_devices[] __initdata = {
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&s3c_device_usb,
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&s3c_device_wdt,
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@@ -786,6 +813,7 @@ static struct platform_device *gta02_devices[] __initdata = {
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>a02_version_device,
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>a02_resume_reason_device,
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&s3c24xx_pwm_device,
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+
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};
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static struct s3c2410_nand_set gta02_nand_sets[] = {
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diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
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index a697ee1..0f40f3f 100644
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--- a/drivers/i2c/chips/pcf50633.c
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+++ b/drivers/i2c/chips/pcf50633.c
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@@ -50,7 +50,6 @@
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#include <linux/jiffies.h>
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#include <asm/mach-types.h>
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-#include <asm/arch/gta02.h>
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#include "pcf50633.h"
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#include <linux/resume-dependency.h>
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@@ -2011,18 +2010,6 @@ static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL);
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* Driver initialization
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***********************************************************************/
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-#ifdef CONFIG_MACH_NEO1973_GTA02
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-/* We currently place those platform devices here to make sure the device
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- * suspend/resume order is correct */
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-static struct platform_device gta01_pm_gps_dev = {
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- .name = "neo1973-pm-gps",
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-};
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-
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-static struct platform_device gta01_pm_bt_dev = {
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- .name = "neo1973-pm-bt",
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-};
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-#endif
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-
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/*
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* CARE! This table is modified at runtime!
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*/
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@@ -2217,14 +2204,16 @@ static int pcf50633_detect(struct i2c_adapter *adapter, int address, int kind)
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data->probe_completed = 1;
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- if (machine_is_neo1973_gta02()) {
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- gta01_pm_gps_dev.dev.parent = &new_client->dev;
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- gta01_pm_bt_dev.dev.parent = &new_client->dev;
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- platform_device_register(>a01_pm_bt_dev);
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- platform_device_register(>a01_pm_gps_dev);
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- } else
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+ if (data->pdata->flag_use_apm_emulation)
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apm_get_power_status = pcf50633_get_power_status;
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+ /* if platform was interested, give him a chance to register
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+ * platform devices that switch power with us as the parent
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+ * at registration time -- ensures suspend / resume ordering
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+ */
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+ if (data->pdata->attach_child_devices)
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+ (data->pdata->attach_child_devices)(&new_client->dev);
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+
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return 0;
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exit_rtc:
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if (data->pdata->used_features & PCF50633_FEAT_RTC)
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@@ -2268,13 +2257,6 @@ static int pcf50633_detach_client(struct i2c_client *client)
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if (pcf->pdata->used_features & PCF50633_FEAT_RTC)
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rtc_device_unregister(pcf->rtc);
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-#ifdef CONFIG_MACH_NEO1973_GTA02
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- if (machine_is_neo1973_gta02()) {
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- platform_device_unregister(>a01_pm_bt_dev);
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- platform_device_unregister(>a01_pm_gps_dev);
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- }
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-#endif
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-
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sysfs_remove_group(&client->dev.kobj, &pcf_attr_group);
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pm_power_off = NULL;
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@@ -2472,6 +2454,26 @@ int pcf50633_ready(struct pcf50633_data *pcf)
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}
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EXPORT_SYMBOL_GPL(pcf50633_ready);
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+int pcf50633_wait_for_ready(struct pcf50633_data *pcf, int timeout_ms,
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+ char *name)
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+{
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+ /* so we always go once */
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+ timeout_ms += 5;
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+
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+ while ((timeout_ms >= 5) && (pcf50633_ready(pcf))) {
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+ timeout_ms -= 5; /* well, it isn't very accurate, but OK */
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+ msleep(5);
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+ }
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+
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+ if (timeout_ms < 5) {
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+ printk(KERN_ERR"pcf50633_wait_for_ready: "
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+ "%s BAILING on timeout\n", name);
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+ return -EBUSY;
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+ }
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+
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+ return 0;
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+}
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+EXPORT_SYMBOL_GPL(pcf50633_wait_for_ready);
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/*
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* if backlight resume is selected to be deferred by platform, then it
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diff --git a/include/linux/pcf50633.h b/include/linux/pcf50633.h
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index b94b72a..4653285 100644
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--- a/include/linux/pcf50633.h
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+++ b/include/linux/pcf50633.h
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@@ -132,7 +132,9 @@ pcf50633_register_resume_dependency(struct pcf50633_data *pcf,
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extern int
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pcf50633_notify_usb_current_limit_change(struct pcf50633_data *pcf,
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unsigned int ma);
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-
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+extern int
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+pcf50633_wait_for_ready(struct pcf50633_data *pcf, int timeout_ms,
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+ char *name);
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/* 0 = initialized and resumed and ready to roll, !=0 = either not
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* initialized or not resumed yet
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@@ -155,6 +157,10 @@ struct pcf50633_platform_data {
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unsigned int onkey_seconds_sig_init;
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unsigned int onkey_seconds_shutdown;
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+ /* callback to attach platform children (to enforce suspend / resume
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+ * ordering */
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+ void (*attach_child_devices)(struct device *parent_device);
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+
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/* voltage regulator related */
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struct pmu_voltage_rail rails[__NUM_PCF50633_REGULATORS];
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unsigned int used_regulators;
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@@ -163,6 +169,7 @@ struct pcf50633_platform_data {
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unsigned int r_fix_batt;
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unsigned int r_fix_batt_par;
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unsigned int r_sense_milli;
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+ int flag_use_apm_emulation;
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unsigned char resumers[5];
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--
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1.5.6.5
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