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Subject[PATCH v1 5/5] mfd: max77620: Support device-tree properly
Date
For some unknown reason the driver for Max77620 doesn't wire up the
device-tree support properly and nothing in kernel creates I2C device
for the driver (and never did), moreover device-tree files for NVIDIA
Tegra210/186/194 boards already have nodes for Max77620. Hence add the
missing of_match_table to make driver actually usable.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/mfd/max77620.c | 33 ++++++++++++++++++++++++++-------
1 file changed, 26 insertions(+), 7 deletions(-)

diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c
index 3b6dded0595c..ef313604ca47 100644
--- a/drivers/mfd/max77620.c
+++ b/drivers/mfd/max77620.c
@@ -37,6 +37,10 @@
#include <linux/regmap.h>
#include <linux/slab.h>

+struct max77620_desc {
+ enum max77620_chip_id chip_id;
+};
+
static const struct resource gpio_resources[] = {
DEFINE_RES_IRQ(MAX77620_IRQ_TOP_GPIO),
};
@@ -486,6 +490,7 @@ static int max77620_probe(struct i2c_client *client,
const struct regmap_config *rmap_config;
struct max77620_chip *chip;
const struct mfd_cell *mfd_cells;
+ const struct max77620_desc *desc;
int n_mfd_cells;
int ret;

@@ -493,11 +498,13 @@ static int max77620_probe(struct i2c_client *client,
if (!chip)
return -ENOMEM;

+ desc = of_device_get_match_data(&client->dev);
+
i2c_set_clientdata(client, chip);
chip->dev = &client->dev;
chip->irq_base = -1;
chip->chip_irq = client->irq;
- chip->chip_id = (enum max77620_chip_id)id->driver_data;
+ chip->chip_id = desc->chip_id;

switch (chip->chip_id) {
case MAX77620:
@@ -665,11 +672,23 @@ static int max77620_i2c_resume(struct device *dev)
}
#endif

-static const struct i2c_device_id max77620_id[] = {
- {"max77620", MAX77620},
- {"max20024", MAX20024},
- {"max77663", MAX77663},
- {},
+static const struct max77620_desc max77620_desc = {
+ .chip_id = MAX77620,
+};
+
+static const struct max77620_desc max20024_desc = {
+ .chip_id = MAX20024,
+};
+
+static const struct max77620_desc max77663_desc = {
+ .chip_id = MAX77663,
+};
+
+static const struct of_device_id max77620_of_match[] = {
+ { .compatible = "maxim,max77620", .data = &max77620_desc },
+ { .compatible = "maxim,max20024", .data = &max20024_desc },
+ { .compatible = "maxim,max77663", .data = &max77663_desc },
+ { },
};

static const struct dev_pm_ops max77620_pm_ops = {
@@ -680,8 +699,8 @@ static struct i2c_driver max77620_driver = {
.driver = {
.name = "max77620",
.pm = &max77620_pm_ops,
+ .of_match_table = of_match_ptr(max77620_of_match),
},
.probe = max77620_probe,
- .id_table = max77620_id,
};
builtin_i2c_driver(max77620_driver);
--
2.21.0
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