diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-designware-platdrv.c | 50 |
1 files changed, 23 insertions, 27 deletions
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index 809579ecb5a4..06061b5a71b3 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -36,6 +36,7 @@ #include <linux/platform_device.h> #include <linux/pm.h> #include <linux/pm_runtime.h> +#include <linux/property.h> #include <linux/io.h> #include <linux/slab.h> #include <linux/acpi.h> @@ -129,10 +130,10 @@ static inline int dw_i2c_acpi_configure(struct platform_device *pdev) static int dw_i2c_plat_probe(struct platform_device *pdev) { + struct dw_i2c_platform_data *pdata = dev_get_platdata(&pdev->dev); struct dw_i2c_dev *dev; struct i2c_adapter *adap; struct resource *mem; - struct dw_i2c_platform_data *pdata; int irq, r; u32 clk_freq, ht = 0; @@ -156,33 +157,28 @@ static int dw_i2c_plat_probe(struct platform_device *pdev) /* fast mode by default because of legacy reasons */ clk_freq = 400000; - if (has_acpi_companion(&pdev->dev)) { - dw_i2c_acpi_configure(pdev); - } else if (pdev->dev.of_node) { - of_property_read_u32(pdev->dev.of_node, - "i2c-sda-hold-time-ns", &ht); - - of_property_read_u32(pdev->dev.of_node, - "i2c-sda-falling-time-ns", - &dev->sda_falling_time); - of_property_read_u32(pdev->dev.of_node, - "i2c-scl-falling-time-ns", - &dev->scl_falling_time); - - of_property_read_u32(pdev->dev.of_node, "clock-frequency", - &clk_freq); - - /* Only standard mode at 100kHz and fast mode at 400kHz - * are supported. - */ - if (clk_freq != 100000 && clk_freq != 400000) { - dev_err(&pdev->dev, "Only 100kHz and 400kHz supported"); - return -EINVAL; - } + if (pdata) { + clk_freq = pdata->i2c_scl_freq; } else { - pdata = dev_get_platdata(&pdev->dev); - if (pdata) - clk_freq = pdata->i2c_scl_freq; + device_property_read_u32(&pdev->dev, "i2c-sda-hold-time-ns", + &ht); + device_property_read_u32(&pdev->dev, "i2c-sda-falling-time-ns", + &dev->sda_falling_time); + device_property_read_u32(&pdev->dev, "i2c-scl-falling-time-ns", + &dev->scl_falling_time); + device_property_read_u32(&pdev->dev, "clock-frequency", + &clk_freq); + } + + if (has_acpi_companion(&pdev->dev)) + dw_i2c_acpi_configure(pdev); + + /* + * Only standard mode at 100kHz and fast mode at 400kHz are supported. + */ + if (clk_freq != 100000 && clk_freq != 400000) { + dev_err(&pdev->dev, "Only 100kHz and 400kHz supported"); + return -EINVAL; } r = i2c_dw_eval_lock_support(dev); |