[PATCH] i2c: at91: add support of device tree
Raphaël Poggi
poggi.raph at gmail.com
Wed Sep 24 05:57:04 PDT 2014
Signed-off-by: Raphaël Poggi <poggi.raph at gmail.com>
---
drivers/i2c/busses/i2c-at91.c | 41 ++++++++++++++++++++++++++++++++++-------
1 file changed, 34 insertions(+), 7 deletions(-)
diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c
index 9490822..a2236ed 100644
--- a/drivers/i2c/busses/i2c-at91.c
+++ b/drivers/i2c/busses/i2c-at91.c
@@ -376,18 +376,44 @@ static struct platform_device_id at91_twi_devtypes[] = {
}
};
+static struct of_device_id at91_twi_dt_ids[] = {
+ {
+ .compatible = "atmel,at91rm9200-i2c",
+ .data = (unsigned long) &at91rm9200_config,
+ } , {
+ .compatible = "atmel,at91sam9260-i2c",
+ .data = (unsigned long) &at91sam9260_config,
+ } , {
+ .compatible = "atmel,at91sam9261-i2c",
+ .data = (unsigned long) &at91sam9261_config,
+ } , {
+ .compatible = "atmel,at91sam9g20-i2c",
+ .data = (unsigned long) &at91sam9g20_config,
+ } , {
+ .compatible = "atmel,at91sam9g10-i2c",
+ .data = (unsigned long) &at91sam9g10_config,
+ }, {
+ .compatible = "atmel,at91sam9x5-i2c",
+ .data = (unsigned long) &at91sam9x5_config,
+ }, {
+ /* sentinel */
+ }
+};
+
static int at91_twi_probe(struct device_d *dev)
{
struct at91_twi_dev *i2c_at91;
struct at91_twi_pdata *i2c_data;
- int rc;
+ int rc = 0;
u32 bus_clk_rate;
i2c_at91 = xzalloc(sizeof(struct at91_twi_dev));
rc = dev_get_drvdata(dev, (unsigned long *)&i2c_data);
- if (rc)
+ if (rc < 0) {
+ dev_err(dev, "failed to retrieve driver data\n");
goto out_free;
+ }
i2c_at91->pdata = i2c_data;
@@ -398,7 +424,7 @@ static int at91_twi_probe(struct device_d *dev)
goto out_free;
}
- i2c_at91->clk = clk_get(dev, "twi_clk");
+ i2c_at91->clk = clk_get(dev, NULL);
if (IS_ERR(i2c_at91->clk)) {
dev_err(dev, "no clock defined\n");
rc = -ENODEV;
@@ -427,17 +453,18 @@ static int at91_twi_probe(struct device_d *dev)
return 0;
out_adap_fail:
- clk_disable(i2c_at91->clk);
- clk_put(i2c_at91->clk);
+ clk_disable(i2c_at91->clk);
+ clk_put(i2c_at91->clk);
out_free:
- kfree(i2c_at91);
- return rc;
+ kfree(i2c_at91);
+ return rc;
}
static struct driver_d at91_twi_driver = {
.name = "at91-twi",
.probe = at91_twi_probe,
.id_table = at91_twi_devtypes,
+ .of_compatible = DRV_OF_COMPAT(at91_twi_dt_ids),
};
device_platform_driver(at91_twi_driver);
--
2.1.0
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