On 8/13/19 3:10 AM, Max Staudt wrote:
On 08/13/2019 10:02 AM, Guenter Roeck wrote:
On Tue, Aug 13, 2019 at 01:52:36AM +0200, Max Staudt wrote:
This allows code using i2c_new_device() to specify a measurement mode.
Signed-off-by: Max Staudt <max@xxxxxxxxx>
Reviewed-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
---
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;
I would prefer if the driver was modified to accept device
properties, and if those were set using the appropriate
fwnode function. Any reason for not doing that ?
The driver does have DT support implemented right above my new platform_data code, and DT takes precedence. However, I can't set DT data programatically when instantiating the client using i2c_new_device() - hence the platform_data support.
Sorry, I don't understand. Why exactly can't you replace of_property_read_u32_array()
with device_property_read_u32_array() and use fwnode_create_software_node()
in the calling code to set the properties ?
Guenter
