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at86rf230: add support for devicetree 

This patch adds devicetree support for the at86rf230 driver.

Possible gpios to configure are "reset-gpio" and "sleep-gpio".
Also add support to configure the "irq-type" for the irq polarity
register.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Aring 2014-03-15 09:29:07 +01:00 committed by David S. Miller
parent 3fa2757124
commit fa2d3e9471
1 changed files with 47 additions and 1 deletions
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48
drivers/net/ieee802154/at86rf230.c
View File

@ -31,6 +31,7 @@
#include <linux/spi/spi.h>
#include <linux/spi/at86rf230.h>
#include <linux/skbuff.h>
#include <linux/of_gpio.h>
#include <net/mac802154.h>
#include <net/wpan-phy.h>
@ -1035,6 +1036,40 @@ static int at86rf230_hw_init(struct at86rf230_local *lp)
return 0;
}
static struct at86rf230_platform_data *
at86rf230_get_pdata(struct spi_device *spi)
{
struct at86rf230_platform_data *pdata;
const char *irq_type;
if (!IS_ENABLED(CONFIG_OF) || !spi->dev.of_node)
return spi->dev.platform_data;
pdata = devm_kzalloc(&spi->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
goto done;
pdata->rstn = of_get_named_gpio(spi->dev.of_node, "reset-gpio", 0);
pdata->slp_tr = of_get_named_gpio(spi->dev.of_node, "sleep-gpio", 0);
pdata->irq_type = IRQF_TRIGGER_RISING;
of_property_read_string(spi->dev.of_node, "irq-type", &irq_type);
if (!strcmp(irq_type, "level-high"))
pdata->irq_type = IRQF_TRIGGER_HIGH;
else if (!strcmp(irq_type, "level-low"))
pdata->irq_type = IRQF_TRIGGER_LOW;
else if (!strcmp(irq_type, "edge-rising"))
pdata->irq_type = IRQF_TRIGGER_RISING;
else if (!strcmp(irq_type, "edge-falling"))
pdata->irq_type = IRQF_TRIGGER_FALLING;
else
dev_warn(&spi->dev, "wrong irq-type specified using edge-rising\n");
spi->dev.platform_data = pdata;
done:
return pdata;
}
static int at86rf230_probe(struct spi_device *spi)
{
struct at86rf230_platform_data *pdata;
@ -1053,7 +1088,7 @@ static int at86rf230_probe(struct spi_device *spi)
return -EINVAL;
}
pdata = spi->dev.platform_data;
pdata = at86rf230_get_pdata(spi);
if (!pdata) {
dev_err(&spi->dev, "no platform_data\n");
return -EINVAL;
@ -1231,8 +1266,19 @@ static int at86rf230_remove(struct spi_device *spi)
return 0;
}
#if IS_ENABLED(CONFIG_OF)
static struct of_device_id at86rf230_of_match[] = {
{ .compatible = "atmel,at86rf230", },
{ .compatible = "atmel,at86rf231", },
{ .compatible = "atmel,at86rf233", },
{ .compatible = "atmel,at86rf212", },
{ },
};
#endif
static struct spi_driver at86rf230_driver = {
.driver = {
.of_match_table = of_match_ptr(at86rf230_of_match),
.name = "at86rf230",
.owner = THIS_MODULE,
},