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authorVaibhav Hiremath <vaibhav.hiremath@linaro.org>2015-07-14 13:06:45 +0530
committerWolfram Sang <wsa@the-dreams.de>2015-08-10 08:37:31 +0200
commit51fcce86a70f6f63d733619afc425821118838dc (patch)
treeda72f1d68d1cc484ebba3e10653461bd3dc61ac5
parent3a2dc1677b60af250bea85d470ef5151c70a1264 (diff)
i2c: pxa: Use devm_ variants in probe function
This patch cleans up i2c_pxa_probe() function, - Use devm_ variants wherever This will clean both probe exit and i2c_pxa_remove() functions - Check platform resource before parsing any other data from DT/platform - Use dev_err on failure from i2c_add_numbered_adapter() - Use pr_info instead of printk for KERN_INFO Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> [wsa: removed unneeded error prinout after devm_ioremap_resource] Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
-rw-r--r--drivers/i2c/busses/i2c-pxa.c77
1 files changed, 26 insertions, 51 deletions
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index beeed7c53f2d..645e4b79d968 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -1158,10 +1158,19 @@ static int i2c_pxa_probe(struct platform_device *dev)
struct resource *res = NULL;
int ret, irq;
- i2c = kzalloc(sizeof(struct pxa_i2c), GFP_KERNEL);
- if (!i2c) {
- ret = -ENOMEM;
- goto emalloc;
+ i2c = devm_kzalloc(&dev->dev, sizeof(struct pxa_i2c), GFP_KERNEL);
+ if (!i2c)
+ return -ENOMEM;
+
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ i2c->reg_base = devm_ioremap_resource(&dev->dev, res);
+ if (IS_ERR(i2c->reg_base))
+ return PTR_ERR(i2c->reg_base);
+
+ irq = platform_get_irq(dev, 0);
+ if (irq < 0) {
+ dev_err(&dev->dev, "no irq resource: %d\n", irq);
+ return irq;
}
/* Default adapter num to device id; i2c_pxa_probe_dt can override. */
@@ -1171,19 +1180,7 @@ static int i2c_pxa_probe(struct platform_device *dev)
if (ret > 0)
ret = i2c_pxa_probe_pdata(dev, i2c, &i2c_type);
if (ret < 0)
- goto eclk;
-
- res = platform_get_resource(dev, IORESOURCE_MEM, 0);
- irq = platform_get_irq(dev, 0);
- if (res == NULL || irq < 0) {
- ret = -ENODEV;
- goto eclk;
- }
-
- if (!request_mem_region(res->start, resource_size(res), res->name)) {
- ret = -ENOMEM;
- goto eclk;
- }
+ return ret;
i2c->adap.owner = THIS_MODULE;
i2c->adap.retries = 5;
@@ -1193,16 +1190,10 @@ static int i2c_pxa_probe(struct platform_device *dev)
strlcpy(i2c->adap.name, "pxa_i2c-i2c", sizeof(i2c->adap.name));
- i2c->clk = clk_get(&dev->dev, NULL);
+ i2c->clk = devm_clk_get(&dev->dev, NULL);
if (IS_ERR(i2c->clk)) {
- ret = PTR_ERR(i2c->clk);
- goto eclk;
- }
-
- i2c->reg_base = ioremap(res->start, resource_size(res));
- if (!i2c->reg_base) {
- ret = -EIO;
- goto eremap;
+ dev_err(&dev->dev, "failed to get the clk: %ld\n", PTR_ERR(i2c->clk));
+ return PTR_ERR(i2c->clk);
}
i2c->reg_ibmr = i2c->reg_base + pxa_reg_layout[i2c_type].ibmr;
@@ -1244,11 +1235,13 @@ static int i2c_pxa_probe(struct platform_device *dev)
i2c->adap.algo = &i2c_pxa_pio_algorithm;
} else {
i2c->adap.algo = &i2c_pxa_algorithm;
- ret = request_irq(irq, i2c_pxa_handler,
+ ret = devm_request_irq(&dev->dev, irq, i2c_pxa_handler,
IRQF_SHARED | IRQF_NO_SUSPEND,
dev_name(&dev->dev), i2c);
- if (ret)
+ if (ret) {
+ dev_err(&dev->dev, "failed to request irq: %d\n", ret);
goto ereqirq;
+ }
}
i2c_pxa_reset(i2c);
@@ -1261,33 +1254,22 @@ static int i2c_pxa_probe(struct platform_device *dev)
ret = i2c_add_numbered_adapter(&i2c->adap);
if (ret < 0) {
- printk(KERN_INFO "I2C: Failed to add bus\n");
- goto eadapt;
+ dev_err(&dev->dev, "failed to add bus: %d\n", ret);
+ goto ereqirq;
}
platform_set_drvdata(dev, i2c);
#ifdef CONFIG_I2C_PXA_SLAVE
- printk(KERN_INFO "I2C: %s: PXA I2C adapter, slave address %d\n",
- dev_name(&i2c->adap.dev), i2c->slave_addr);
+ dev_info(&i2c->adap.dev, " PXA I2C adapter, slave address %d\n",
+ i2c->slave_addr);
#else
- printk(KERN_INFO "I2C: %s: PXA I2C adapter\n",
- dev_name(&i2c->adap.dev));
+ dev_info(&i2c->adap.dev, " PXA I2C adapter\n");
#endif
return 0;
-eadapt:
- if (!i2c->use_pio)
- free_irq(irq, i2c);
ereqirq:
clk_disable_unprepare(i2c->clk);
- iounmap(i2c->reg_base);
-eremap:
- clk_put(i2c->clk);
-eclk:
- kfree(i2c);
-emalloc:
- release_mem_region(res->start, resource_size(res));
return ret;
}
@@ -1296,15 +1278,8 @@ static int i2c_pxa_remove(struct platform_device *dev)
struct pxa_i2c *i2c = platform_get_drvdata(dev);
i2c_del_adapter(&i2c->adap);
- if (!i2c->use_pio)
- free_irq(i2c->irq, i2c);
clk_disable_unprepare(i2c->clk);
- clk_put(i2c->clk);
-
- iounmap(i2c->reg_base);
- release_mem_region(i2c->iobase, i2c->iosize);
- kfree(i2c);
return 0;
}