Allow the lm70 to be probed from a device tree. Signed-off-by: Rabin Vincent <rabin@xxxxxx> --- Documentation/devicetree/bindings/hwmon/lm70.txt | 21 +++++++++++++++ drivers/hwmon/lm70.c | 34 +++++++++++++++++++++++- 2 files changed, 54 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/hwmon/lm70.txt diff --git a/Documentation/devicetree/bindings/hwmon/lm70.txt b/Documentation/devicetree/bindings/hwmon/lm70.txt new file mode 100644 index 0000000..e7fd921 --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/lm70.txt @@ -0,0 +1,21 @@ +* LM70/TMP121/LM71/LM74 thermometer. + +Required properties: +- compatible: one of + "ti,lm70" + "ti,tmp121" + "ti,lm71" + "ti,lm74" + +See Documentation/devicetree/bindings/spi/spi-bus.txt for more required and +optional properties. + +Example: + +spi_master { + temperature-sensor@0 { + compatible = "ti,lm70"; + reg = <0>; + spi-max-frequency = <1000000>; + }; +}; diff --git a/drivers/hwmon/lm70.c b/drivers/hwmon/lm70.c index 97204dc..9296e9d 100644 --- a/drivers/hwmon/lm70.c +++ b/drivers/hwmon/lm70.c @@ -37,6 +37,7 @@ #include <linux/mod_devicetable.h> #include <linux/spi/spi.h> #include <linux/slab.h> +#include <linux/of_device.h> #define DRVNAME "lm70" @@ -130,11 +131,41 @@ ATTRIBUTE_GROUPS(lm70); /*----------------------------------------------------------------------*/ +#ifdef CONFIG_OF +static const struct of_device_id lm70_of_ids[] = { + { + .compatible = "ti,lm70", + .data = (void *) LM70_CHIP_LM70, + }, + { + .compatible = "ti,tmp121", + .data = (void *) LM70_CHIP_TMP121, + }, + { + .compatible = "ti,lm71", + .data = (void *) LM70_CHIP_LM71, + }, + { + .compatible = "ti,lm74", + .data = (void *) LM70_CHIP_LM74, + }, + {}, +}; +MODULE_DEVICE_TABLE(of, lm70_of_ids); +#endif + static int lm70_probe(struct spi_device *spi) { - int chip = spi_get_device_id(spi)->driver_data; + const struct of_device_id *match; struct device *hwmon_dev; struct lm70 *p_lm70; + int chip; + + match = of_match_device(lm70_of_ids, &spi->dev); + if (match) + chip = (int)(uintptr_t)match->data; + else + chip = spi_get_device_id(spi)->driver_data; /* signaling is SPI_MODE_0 */ if (spi->mode & (SPI_CPOL | SPI_CPHA)) @@ -169,6 +200,7 @@ static struct spi_driver lm70_driver = { .driver = { .name = "lm70", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(lm70_of_ids), }, .id_table = lm70_ids, .probe = lm70_probe, -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html