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ADC and battery fixes * Fix concurrent battery readings * Add missing kfree in battery driver remove * Fix disabling of a ADC component

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SVN-Revision: 23670
This commit is contained in:
Lars-Peter Clausen 2010-10-27 14:11:36 +00:00
parent 98cc28e7d7
commit 4b67cfb58c
2 changed files with 89 additions and 0 deletions
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64
target/linux/xburst/patches-2.6.36/300-battery-fixes.patch Normal file
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@ -0,0 +1,64 @@
From 2d435d52c63e4dd544938bad638ecd518cc04d1c Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Tue, 26 Oct 2010 20:13:40 +0200
Subject: [PATCH] POWER: jz4740-battery: Protect against concurrent battery readings
We can not handle more then one ADC request at a time to the battery. The patch
adds a mutex around the ADC read code to ensure this.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
jz4740-battery: Add missing kfree(jz_battery) in jz_battery_remove()
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-By: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
---
drivers/power/jz4740-battery.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
--- a/drivers/power/jz4740-battery.c
+++ b/drivers/power/jz4740-battery.c
@@ -47,6 +47,8 @@ struct jz_battery {
struct power_supply battery;
struct delayed_work work;
+
+ struct mutex lock;
};
static inline struct jz_battery *psy_to_jz_battery(struct power_supply *psy)
@@ -68,6 +70,8 @@ static long jz_battery_read_voltage(stru
unsigned long val;
long voltage;
+ mutex_lock(&battery->lock);
+
INIT_COMPLETION(battery->read_completion);
enable_irq(battery->irq);
@@ -91,6 +95,8 @@ static long jz_battery_read_voltage(stru
battery->cell->disable(battery->pdev);
disable_irq(battery->irq);
+ mutex_unlock(&battery->lock);
+
return voltage;
}
@@ -291,6 +297,7 @@ static int __devinit jz_battery_probe(st
jz_battery->pdev = pdev;
init_completion(&jz_battery->read_completion);
+ mutex_init(&jz_battery->lock);
INIT_DELAYED_WORK(&jz_battery->work, jz_battery_work);
@@ -383,6 +390,7 @@ static int __devexit jz_battery_remove(s
iounmap(jz_battery->base);
release_mem_region(jz_battery->mem->start, resource_size(jz_battery->mem));
+ kfree(jz_battery);
return 0;
}

25
target/linux/xburst/patches-2.6.36/301-mfd-adc-fixes.patch Normal file
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@ -0,0 +1,25 @@
From 1abac8c26df9112efee5da078f163b1c32075037 Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@gmail.com>
Date: Thu, 7 Oct 2010 15:51:20 +0800
Subject: [PATCH] mfd: Fix jz4740_adc_set_enabled
When enabled is false, clear BIT(engine) of JZ_REG_ADC_ENABLE register.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
---
drivers/mfd/jz4740-adc.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
--- a/drivers/mfd/jz4740-adc.c
+++ b/drivers/mfd/jz4740-adc.c
@@ -154,7 +154,7 @@ static inline void jz4740_adc_set_enable
if (enabled)
val |= BIT(engine);
else
- val &= BIT(engine);
+ val &= ~BIT(engine);
writeb(val, adc->base + JZ_REG_ADC_ENABLE);
spin_unlock_irqrestore(&adc->lock, flags);