Re: [PATCH] hwmon/ltc2990: Generalise DT to fwnode support

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Hi Max,

On Fri, Aug 16, 2019 at 11:09 AM Max Staudt <max@xxxxxxxxx> wrote:
ltc2990 will now use device_property_read_u32_array() instead of
of_property_read_u32_array() - allowing the use of software nodes
via fwnode_create_software_node().

This allows code using i2c_new_device() to specify a default
measurement mode for the LTC2990 via fwnode_create_software_node().

Signed-off-by: Max Staudt <max@xxxxxxxxx>

Thanks for your patch!

Reviewed-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>

One minor nit: as the driver no longer uses any of_*() symbols, you can replace
#include <linux/of.h> by #include <linux/property.h>.

--- a/drivers/hwmon/ltc2990.c
+++ b/drivers/hwmon/ltc2990.c
@@ -206,7 +206,6 @@ static int ltc2990_i2c_probe(struct i2c_client *i2c,
        int ret;
        struct device *hwmon_dev;
        struct ltc2990_data *data;
-       struct device_node *of_node = i2c->dev.of_node;

        if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA |
                                     I2C_FUNC_SMBUS_WORD_DATA))
@@ -218,9 +217,10 @@ static int ltc2990_i2c_probe(struct i2c_client *i2c,

        data->i2c = i2c;

-       if (of_node) {
-               ret = of_property_read_u32_array(of_node, "lltc,meas-mode",
-                                                data->mode, 2);
+       if (dev_fwnode(&i2c->dev)) {
+               ret = device_property_read_u32_array(&i2c->dev,
+                                                    "lltc,meas-mode",
+                                                    data->mode, 2);
                if (ret < 0)
                        return ret;

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds



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