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Message-Id: <20230905184252.222742-2-biju.das.jz@bp.renesas.com>
Date: Tue, 5 Sep 2023 19:42:51 +0100
From: Biju Das <biju.das.jz@...renesas.com>
To: Eric Tremblay <etremblay@...tech-controls.com>,
Jean Delvare <jdelvare@...e.com>,
Guenter Roeck <linux@...ck-us.net>
Cc: Biju Das <biju.das.jz@...renesas.com>, linux-hwmon@...r.kernel.org,
linux-kernel@...r.kernel.org, Biju Das <biju.das.au@...il.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v4 1/2] hwmon: tmp513: Add max_channels variable to struct tmp51x_data
The tmp512 chip has 3 channels whereas tmp513 has 4 channels. Avoid
using tmp51x_ids for this HW difference by replacing OF/ID table
data with maximum channels supported by the device.
Replace id->max_channels variable from struct tmp51x_data and drop the
macros TMP51{2,3}_TEMP_CONFIG_DEFAULT as it can be derived from the macro
TMP51X_TEMP_CONFIG_DEFAULT and update the logic in tmp51x_is_visible(),
tmp51x_read_properties() and tmp51x_init() using max_channels.
While at it, drop enum tmp51x_ids as there is no user and remove
trailing comma in the terminator entry for OF table.
Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
---
v3->v4:
* Updated commit description
* Updated macros TMP51X_TEMP_CONFIG_DEFAULT and TMP51X_TEMP_CHANNEL_MASK.
* Removed trailing comma in the terminator entry for OF table.
v2->v3:
* Updated the macro TMP51X_TEMP_CONFIG_DEFAULT by adding bit definitions.
* Dropped unused macros TMP51{2,3}_TEMP_CONFIG_DEFAULT.
* Avoided Yoda style logic.
* Replaced OF/ID data from tmp51x_ids->max_channels
v2:
* New patch.
---
drivers/hwmon/tmp513.c | 51 +++++++++++++++++++++---------------------
1 file changed, 25 insertions(+), 26 deletions(-)
diff --git a/drivers/hwmon/tmp513.c b/drivers/hwmon/tmp513.c
index 9a180b1030c9..7c531fa4453e 100644
--- a/drivers/hwmon/tmp513.c
+++ b/drivers/hwmon/tmp513.c
@@ -19,6 +19,7 @@
* the Free Software Foundation; version 2 of the License.
*/
+#include <linux/bitfield.h>
#include <linux/err.h>
#include <linux/hwmon.h>
#include <linux/i2c.h>
@@ -73,9 +74,6 @@
#define TMP51X_PGA_DEFAULT 8
#define TMP51X_MAX_REGISTER_ADDR 0xFF
-#define TMP512_TEMP_CONFIG_DEFAULT 0xBF80
-#define TMP513_TEMP_CONFIG_DEFAULT 0xFF80
-
// Mask and shift
#define CURRENT_SENSE_VOLTAGE_320_MASK 0x1800
#define CURRENT_SENSE_VOLTAGE_160_MASK 0x1000
@@ -113,6 +111,18 @@
#define MAX_TEMP_HYST 127500
+#define TMP512_MAX_CHANNELS 3
+#define TMP513_MAX_CHANNELS 4
+
+#define TMP51X_TEMP_CONFIG_CONV_RATE FIELD_PREP(GENMASK(9, 7), 0x7)
+#define TMP51X_TEMP_CONFIG_RC BIT(10)
+#define TMP51X_TEMP_CHANNEL_MASK(n) FIELD_PREP(GENMASK(14, 11), \
+ GENMASK((n) - 1, 0))
+#define TMP51X_TEMP_CONFIG_CONT BIT(15)
+#define TMP51X_TEMP_CONFIG_DEFAULT(n) (TMP51X_TEMP_CONFIG_CONT | \
+ TMP51X_TEMP_CHANNEL_MASK(n) | \
+ TMP51X_TEMP_CONFIG_CONV_RATE | TMP51X_TEMP_CONFIG_RC)
+
static const u8 TMP51X_TEMP_INPUT[4] = {
TMP51X_LOCAL_TEMP_RESULT,
TMP51X_REMOTE_TEMP_RESULT_1,
@@ -152,10 +162,6 @@ static struct regmap_config tmp51x_regmap_config = {
.max_register = TMP51X_MAX_REGISTER_ADDR,
};
-enum tmp51x_ids {
- tmp512, tmp513
-};
-
struct tmp51x_data {
u16 shunt_config;
u16 pga_gain;
@@ -169,7 +175,7 @@ struct tmp51x_data {
u32 curr_lsb_ua;
u32 pwr_lsb_uw;
- enum tmp51x_ids id;
+ u8 max_channels;
struct regmap *regmap;
};
@@ -434,7 +440,7 @@ static umode_t tmp51x_is_visible(const void *_data,
switch (type) {
case hwmon_temp:
- if (data->id == tmp512 && channel == 3)
+ if (channel >= data->max_channels)
return 0;
switch (attr) {
case hwmon_temp_input:
@@ -585,7 +591,7 @@ static int tmp51x_init(struct tmp51x_data *data)
if (ret < 0)
return ret;
- if (data->id == tmp513) {
+ if (data->max_channels == TMP513_MAX_CHANNELS) {
ret = regmap_write(data->regmap, TMP513_N_FACTOR_3,
data->nfactor[2] << 8);
if (ret < 0)
@@ -601,22 +607,16 @@ static int tmp51x_init(struct tmp51x_data *data)
}
static const struct i2c_device_id tmp51x_id[] = {
- { "tmp512", tmp512 },
- { "tmp513", tmp513 },
+ { "tmp512", TMP512_MAX_CHANNELS },
+ { "tmp513", TMP513_MAX_CHANNELS },
{ }
};
MODULE_DEVICE_TABLE(i2c, tmp51x_id);
static const struct of_device_id tmp51x_of_match[] = {
- {
- .compatible = "ti,tmp512",
- .data = (void *)tmp512
- },
- {
- .compatible = "ti,tmp513",
- .data = (void *)tmp513
- },
- { },
+ { .compatible = "ti,tmp512", .data = (void *)TMP512_MAX_CHANNELS },
+ { .compatible = "ti,tmp513", .data = (void *)TMP513_MAX_CHANNELS },
+ { }
};
MODULE_DEVICE_TABLE(of, tmp51x_of_match);
@@ -674,9 +674,9 @@ static int tmp51x_read_properties(struct device *dev, struct tmp51x_data *data)
return ret;
ret = device_property_read_u32_array(dev, "ti,nfactor", nfactor,
- (data->id == tmp513) ? 3 : 2);
+ data->max_channels - 1);
if (ret >= 0)
- memcpy(data->nfactor, nfactor, (data->id == tmp513) ? 3 : 2);
+ memcpy(data->nfactor, nfactor, data->max_channels - 1);
// Check if shunt value is compatible with pga-gain
if (data->shunt_uohms > data->pga_gain * 40 * 1000 * 1000) {
@@ -698,8 +698,7 @@ static void tmp51x_use_default(struct tmp51x_data *data)
static int tmp51x_configure(struct device *dev, struct tmp51x_data *data)
{
data->shunt_config = TMP51X_SHUNT_CONFIG_DEFAULT;
- data->temp_config = (data->id == tmp513) ?
- TMP513_TEMP_CONFIG_DEFAULT : TMP512_TEMP_CONFIG_DEFAULT;
+ data->temp_config = TMP51X_TEMP_CONFIG_DEFAULT(data->max_channels);
if (dev->of_node)
return tmp51x_read_properties(dev, data);
@@ -720,7 +719,7 @@ static int tmp51x_probe(struct i2c_client *client)
if (!data)
return -ENOMEM;
- data->id = (uintptr_t)i2c_get_match_data(client);
+ data->max_channels = (uintptr_t)i2c_get_match_data(client);
ret = tmp51x_configure(dev, data);
if (ret < 0) {
--
2.25.1
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