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Date: Wed, 16 Feb 2011 22:28:20 +0000 (GMT)
From: Daniel Drake <dsd@...top.org>
To: dwmw2@...radead.org
Cc: dmitry.torokhov@...il.com
Subject: [PATCH v3] olpc_battery: convert to platform device
This is needed so that suspend/resume (wakeup) support can be added.
Signed-off-by: Daniel Drake <dsd@...top.org>
---
arch/x86/platform/olpc/olpc.c | 15 +++++++++++
drivers/power/olpc_battery.c | 53 +++++++++++++++++++++++-----------------
2 files changed, 45 insertions(+), 23 deletions(-)
v2: add MODULE_ALIAS thanks to Dmitry Torokhov
v3: fix __devexit annotation thanks to Dmitry
diff --git a/arch/x86/platform/olpc/olpc.c b/arch/x86/platform/olpc/olpc.c
index edaf3fe..a5fb933 100644
--- a/arch/x86/platform/olpc/olpc.c
+++ b/arch/x86/platform/olpc/olpc.c
@@ -239,6 +239,17 @@ static int __init add_xo1_platform_devices(void)
return 0;
}
+static int __init add_common_platform_devices(void)
+{
+ struct platform_device *pdev;
+
+ pdev = platform_device_register_simple("olpc-battery", -1, NULL, 0);
+ if (IS_ERR(pdev))
+ return PTR_ERR(pdev);
+
+ return 0;
+}
+
static int __init olpc_init(void)
{
int r = 0;
@@ -269,6 +280,10 @@ static int __init olpc_init(void)
olpc_platform_info.boardrev >> 4,
olpc_platform_info.ecver);
+ r = add_common_platform_devices();
+ if (r)
+ return r;
+
if (olpc_platform_info.boardrev < olpc_board_pre(0xd0)) { /* XO-1 */
r = add_xo1_platform_devices();
if (r)
diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
index 0b0ff3a..18580b4 100644
--- a/drivers/power/olpc_battery.c
+++ b/drivers/power/olpc_battery.c
@@ -519,8 +519,6 @@ static struct device_attribute olpc_bat_error = {
* Initialisation
*********************************************************************/
-static struct platform_device *bat_pdev;
-
static struct power_supply olpc_bat = {
.get_property = olpc_bat_get_property,
.use_for_apm = 1,
@@ -534,14 +532,11 @@ void olpc_battery_trigger_uevent(unsigned long cause)
kobject_uevent(&olpc_bat.dev->kobj, KOBJ_CHANGE);
}
-static int __init olpc_bat_init(void)
+static int __devinit olpc_battery_probe(struct platform_device *pdev)
{
- int ret = 0;
+ int ret;
uint8_t status;
- if (!olpc_platform_info.ecver)
- return -ENXIO;
-
/*
* We've seen a number of EC protocol changes; this driver requires
* the latest EC protocol, supported by 0x44 and above.
@@ -552,21 +547,16 @@ static int __init olpc_bat_init(void)
return -ENXIO;
}
+ /* Ignore the status. It doesn't actually matter */
ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1);
if (ret)
return ret;
- /* Ignore the status. It doesn't actually matter */
-
- bat_pdev = platform_device_register_simple("olpc-battery", 0, NULL, 0);
- if (IS_ERR(bat_pdev))
- return PTR_ERR(bat_pdev);
-
- ret = power_supply_register(&bat_pdev->dev, &olpc_ac);
+ ret = power_supply_register(&pdev->dev, &olpc_ac);
if (ret)
- goto ac_failed;
+ return ret;
- olpc_bat.name = bat_pdev->name;
+ olpc_bat.name = pdev->name;
if (olpc_board_at_least(olpc_board_pre(0xd0))) { /* XO-1.5 */
olpc_bat.properties = olpc_xo15_bat_props;
olpc_bat.num_properties = ARRAY_SIZE(olpc_xo15_bat_props);
@@ -575,7 +565,7 @@ static int __init olpc_bat_init(void)
olpc_bat.num_properties = ARRAY_SIZE(olpc_xo1_bat_props);
}
- ret = power_supply_register(&bat_pdev->dev, &olpc_bat);
+ ret = power_supply_register(&pdev->dev, &olpc_bat);
if (ret)
goto battery_failed;
@@ -587,7 +577,7 @@ static int __init olpc_bat_init(void)
if (ret)
goto error_failed;
- goto success;
+ return 0;
error_failed:
device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
@@ -595,19 +585,35 @@ eeprom_failed:
power_supply_unregister(&olpc_bat);
battery_failed:
power_supply_unregister(&olpc_ac);
-ac_failed:
- platform_device_unregister(bat_pdev);
-success:
return ret;
}
-static void __exit olpc_bat_exit(void)
+static int __devexit olpc_battery_remove(struct platform_device *pdev)
{
device_remove_file(olpc_bat.dev, &olpc_bat_error);
device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
power_supply_unregister(&olpc_bat);
power_supply_unregister(&olpc_ac);
- platform_device_unregister(bat_pdev);
+ return 0;
+}
+
+static struct platform_driver olpc_battery_drv = {
+ .driver = {
+ .name = "olpc-battery",
+ .owner = THIS_MODULE,
+ },
+ .probe = olpc_battery_probe,
+ .remove = __devexit_p(olpc_battery_remove),
+};
+
+static int __init olpc_bat_init(void)
+{
+ return platform_driver_register(&olpc_battery_drv);
+}
+
+static void __exit olpc_bat_exit(void)
+{
+ platform_driver_unregister(&olpc_battery_drv);
}
module_init(olpc_bat_init);
@@ -616,3 +622,4 @@ module_exit(olpc_bat_exit);
MODULE_AUTHOR("David Woodhouse <dwmw2@...radead.org>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Battery driver for One Laptop Per Child 'XO' machine");
+MODULE_ALIAS("platform:olpc-battery");
--
1.7.4
--
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