[PATCH v2 3/4] hwmon/ltc2990: Add platform_data support

Max Staudt
2019-08-12T23:53:21Z

This allows code using i2c_new_device() to specify a measurement mode.

Signed-off-by: Max Staudt <max@enpas.org>
---
drivers/hwmon/ltc2990.c | 9 +++++++++
include/linux/platform_data/ltc2990.h | 11 +++++++++++
2 files changed, 20 insertions(+)
create mode 100644 include/linux/platform_data/ltc2990.h

diff --git a/drivers/hwmon/ltc2990.c b/drivers/hwmon/ltc2990.c
index f9431ad43..f19b9c50c 100644
--- a/drivers/hwmon/ltc2990.c
+++ b/drivers/hwmon/ltc2990.c
@@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/platform_data/ltc2990.h>

#define LTC2990_STATUS 0x00
#define LTC2990_CONTROL 0x01
@@ -206,6 +207,7 @@ static int ltc2990_i2c_probe(struct i2c_client *i2c,
int ret;
struct device *hwmon_dev;
struct ltc2990_data *data;
+ struct ltc2990_platform_data *pdata = dev_get_platdata(&i2c->dev);
struct device_node *of_node = i2c->dev.of_node;

if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA |
@@ -227,6 +229,13 @@ static int ltc2990_i2c_probe(struct i2c_client *i2c,
if (data->mode[0] & ~LTC2990_MODE0_MASK ||
data->mode[1] & ~LTC2990_MODE1_MASK)
return -EINVAL;
+ } else if (pdata) {
+ data->mode[0] = pdata->meas_mode[0];
+ data->mode[1] = pdata->meas_mode[1];
+
+ if (data->mode[0] & ~LTC2990_MODE0_MASK ||
+ data->mode[1] & ~LTC2990_MODE1_MASK)
+ return -EINVAL;
} else {
ret = i2c_smbus_read_byte_data(i2c, LTC2990_CONTROL);
if (ret < 0)
diff --git a/include/linux/platform_data/ltc2990.h b/include/linux/platform_data/ltc2990.h
new file mode 100644
index 000000000..7ec89e784
--- /dev/null
+++ b/include/linux/platform_data/ltc2990.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef LTC2990_PDATA_H
+#define LTC2990_PDATA_H
+
+#include <linux/types.h>
+
+struct ltc2990_platform_data {
+ u8 meas_mode[2];
+};
+
+#endif /* LTC2990_PDATA_H */
--
2.11.0