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ixp4xx: fix the i2c pld driver for 2.6.37 - i2c uses a rt_mutex instead of a mutex now

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25725 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2011-02-26 06:23:23 +00:00
parent 28b7905f64
commit c81ca95c1b
1 changed files with 13 additions and 13 deletions
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26
target/linux/ixp4xx/patches-2.6.37/020-gateworks_i2c_pld.patch
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@ -51,7 +51,7 @@
+/*
+ * The Gateworks I2C PLD chip does not properly send the acknowledge bit
+ * thus we cannot use standard i2c_smbus functions. We have recreated
+ * our own here, but we still use the mutex_lock to lock the i2c_bus
+ * our own here, but we still use the rt_mutex_lock to lock the i2c_bus
+ * as the device still exists on the I2C bus.
+*/
+
@ -179,21 +179,21 @@
+ int ret;
+ struct gw_i2c_pld *gpio = container_of(chip, struct gw_i2c_pld, chip);
+ struct i2c_adapter *adap = gpio->client->adapter;
+
+
+ if (in_atomic() || irqs_disabled()) {
+ ret = mutex_trylock(&adap->bus_lock);
+ ret = rt_mutex_trylock(&adap->bus_lock);
+ if (!ret)
+ /* I2C activity is ongoing. */
+ return -EAGAIN;
+ } else {
+ mutex_lock_nested(&adap->bus_lock, adap->level);
+ rt_mutex_lock(&adap->bus_lock);
+ }
+
+ gpio->out |= (1 << offset);
+
+ ret = i2c_pld_write_byte(gpio->client->addr, gpio->out);
+
+ mutex_unlock(&adap->bus_lock);
+ rt_mutex_unlock(&adap->bus_lock);
+
+ return ret;
+}
@ -204,19 +204,19 @@
+ s32 value;
+ struct gw_i2c_pld *gpio = container_of(chip, struct gw_i2c_pld, chip);
+ struct i2c_adapter *adap = gpio->client->adapter;
+
+
+ if (in_atomic() || irqs_disabled()) {
+ ret = mutex_trylock(&adap->bus_lock);
+ ret = rt_mutex_trylock(&adap->bus_lock);
+ if (!ret)
+ /* I2C activity is ongoing. */
+ return -EAGAIN;
+ } else {
+ mutex_lock_nested(&adap->bus_lock, adap->level);
+ rt_mutex_lock(&adap->bus_lock);
+ }
+
+ value = i2c_pld_read_byte(gpio->client->addr);
+
+ mutex_unlock(&adap->bus_lock);
+ rt_mutex_unlock(&adap->bus_lock);
+
+ return (value < 0) ? 0 : (value & (1 << offset));
+}
@ -229,14 +229,14 @@
+ struct i2c_adapter *adap = gpio->client->adapter;
+
+ unsigned bit = 1 << offset;
+
+
+ if (in_atomic() || irqs_disabled()) {
+ ret = mutex_trylock(&adap->bus_lock);
+ ret = rt_mutex_trylock(&adap->bus_lock);
+ if (!ret)
+ /* I2C activity is ongoing. */
+ return -EAGAIN;
+ } else {
+ mutex_lock_nested(&adap->bus_lock, adap->level);
+ rt_mutex_lock(&adap->bus_lock);
+ }
+
+
@ -247,7 +247,7 @@
+
+ ret = i2c_pld_write_byte(gpio->client->addr, gpio->out);
+
+ mutex_unlock(&adap->bus_lock);
+ rt_mutex_unlock(&adap->bus_lock);
+
+ return ret;
+}