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Diffstat (limited to 'drivers/i2c/busses/i2c-davinci.c')
-rw-r--r--drivers/i2c/busses/i2c-davinci.c77
1 files changed, 25 insertions, 52 deletions
diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c
index 7d1e590a7bb..cf20e06a88e 100644
--- a/drivers/i2c/busses/i2c-davinci.c
+++ b/drivers/i2c/busses/i2c-davinci.c
@@ -137,7 +137,7 @@ static inline u16 davinci_i2c_read_reg(struct davinci_i2c_dev *i2c_dev, int reg)
}
/* Generate a pulse on the i2c clock pin. */
-static void generic_i2c_clock_pulse(unsigned int scl_pin)
+static void davinci_i2c_clock_pulse(unsigned int scl_pin)
{
u16 i;
@@ -155,7 +155,7 @@ static void generic_i2c_clock_pulse(unsigned int scl_pin)
/* This routine does i2c bus recovery as specified in the
* i2c protocol Rev. 03 section 3.16 titled "Bus clear"
*/
-static void i2c_recover_bus(struct davinci_i2c_dev *dev)
+static void davinci_i2c_recover_bus(struct davinci_i2c_dev *dev)
{
u32 flag = 0;
struct davinci_i2c_platform_data *pdata = dev->pdata;
@@ -166,7 +166,7 @@ static void i2c_recover_bus(struct davinci_i2c_dev *dev)
flag |= DAVINCI_I2C_MDR_NACK;
/* write the data into mode register */
davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, flag);
- generic_i2c_clock_pulse(pdata->scl_pin);
+ davinci_i2c_clock_pulse(pdata->scl_pin);
/* Send STOP */
flag = davinci_i2c_read_reg(dev, DAVINCI_I2C_MDR_REG);
flag |= DAVINCI_I2C_MDR_STP;
@@ -289,7 +289,7 @@ static int i2c_davinci_wait_bus_not_busy(struct davinci_i2c_dev *dev,
return -ETIMEDOUT;
} else {
to_cnt = 0;
- i2c_recover_bus(dev);
+ davinci_i2c_recover_bus(dev);
i2c_davinci_init(dev);
}
}
@@ -379,7 +379,7 @@ i2c_davinci_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg, int stop)
dev->adapter.timeout);
if (r == 0) {
dev_err(dev->dev, "controller timed out\n");
- i2c_recover_bus(dev);
+ davinci_i2c_recover_bus(dev);
i2c_davinci_init(dev);
dev->buf_len = 0;
return -ETIMEDOUT;
@@ -643,7 +643,7 @@ static int davinci_i2c_probe(struct platform_device *pdev)
{
struct davinci_i2c_dev *dev;
struct i2c_adapter *adap;
- struct resource *mem, *irq, *ioarea;
+ struct resource *mem, *irq;
int r;
/* NOTE: driver uses the static register mapping */
@@ -659,24 +659,18 @@ static int davinci_i2c_probe(struct platform_device *pdev)
return -ENODEV;
}
- ioarea = request_mem_region(mem->start, resource_size(mem),
- pdev->name);
- if (!ioarea) {
- dev_err(&pdev->dev, "I2C region already claimed\n");
- return -EBUSY;
- }
-
- dev = kzalloc(sizeof(struct davinci_i2c_dev), GFP_KERNEL);
+ dev = devm_kzalloc(&pdev->dev, sizeof(struct davinci_i2c_dev),
+ GFP_KERNEL);
if (!dev) {
- r = -ENOMEM;
- goto err_release_region;
+ dev_err(&pdev->dev, "Memory allocation failed\n");
+ return -ENOMEM;
}
init_completion(&dev->cmd_complete);
#ifdef CONFIG_CPU_FREQ
init_completion(&dev->xfr_complete);
#endif
- dev->dev = get_device(&pdev->dev);
+ dev->dev = &pdev->dev;
dev->irq = irq->start;
dev->pdata = dev->dev->platform_data;
platform_set_drvdata(pdev, dev);
@@ -686,10 +680,9 @@ static int davinci_i2c_probe(struct platform_device *pdev)
dev->pdata = devm_kzalloc(&pdev->dev,
sizeof(struct davinci_i2c_platform_data), GFP_KERNEL);
- if (!dev->pdata) {
- r = -ENOMEM;
- goto err_free_mem;
- }
+ if (!dev->pdata)
+ return -ENOMEM;
+
memcpy(dev->pdata, &davinci_i2c_platform_data_default,
sizeof(struct davinci_i2c_platform_data));
if (!of_property_read_u32(pdev->dev.of_node, "clock-frequency",
@@ -699,22 +692,21 @@ static int davinci_i2c_probe(struct platform_device *pdev)
dev->pdata = &davinci_i2c_platform_data_default;
}
- dev->clk = clk_get(&pdev->dev, NULL);
- if (IS_ERR(dev->clk)) {
- r = -ENODEV;
- goto err_free_mem;
- }
+ dev->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(dev->clk))
+ return -ENODEV;
clk_prepare_enable(dev->clk);
- dev->base = ioremap(mem->start, resource_size(mem));
- if (!dev->base) {
- r = -EBUSY;
- goto err_mem_ioremap;
+ dev->base = devm_ioremap_resource(&pdev->dev, mem);
+ if (IS_ERR(dev->base)) {
+ r = PTR_ERR(dev->base);
+ goto err_unuse_clocks;
}
i2c_davinci_init(dev);
- r = request_irq(dev->irq, i2c_davinci_isr, 0, pdev->name, dev);
+ r = devm_request_irq(&pdev->dev, dev->irq, i2c_davinci_isr, 0,
+ pdev->name, dev);
if (r) {
dev_err(&pdev->dev, "failure requesting irq %i\n", dev->irq);
goto err_unuse_clocks;
@@ -723,7 +715,7 @@ static int davinci_i2c_probe(struct platform_device *pdev)
r = i2c_davinci_cpufreq_register(dev);
if (r) {
dev_err(&pdev->dev, "failed to register cpufreq\n");
- goto err_free_irq;
+ goto err_unuse_clocks;
}
adap = &dev->adapter;
@@ -740,50 +732,31 @@ static int davinci_i2c_probe(struct platform_device *pdev)
r = i2c_add_numbered_adapter(adap);
if (r) {
dev_err(&pdev->dev, "failure adding adapter\n");
- goto err_free_irq;
+ goto err_unuse_clocks;
}
of_i2c_register_devices(adap);
return 0;
-err_free_irq:
- free_irq(dev->irq, dev);
err_unuse_clocks:
- iounmap(dev->base);
-err_mem_ioremap:
clk_disable_unprepare(dev->clk);
- clk_put(dev->clk);
dev->clk = NULL;
-err_free_mem:
- put_device(&pdev->dev);
- kfree(dev);
-err_release_region:
- release_mem_region(mem->start, resource_size(mem));
-
return r;
}
static int davinci_i2c_remove(struct platform_device *pdev)
{
struct davinci_i2c_dev *dev = platform_get_drvdata(pdev);
- struct resource *mem;
i2c_davinci_cpufreq_deregister(dev);
i2c_del_adapter(&dev->adapter);
- put_device(&pdev->dev);
clk_disable_unprepare(dev->clk);
- clk_put(dev->clk);
dev->clk = NULL;
davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, 0);
- free_irq(dev->irq, dev);
- iounmap(dev->base);
- kfree(dev);
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(mem->start, resource_size(mem));
return 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-26 01:40:01 +0000