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Message-ID: <20240902075319.585656-4-patrick.rudolph@9elements.com>
Date: Mon, 2 Sep 2024 09:53:15 +0200
From: Patrick Rudolph <patrick.rudolph@...ements.com>
To: linux-kernel@...r.kernel.org
Cc: jdelvare@...e.com,
linux@...ck-us.net,
Patrick Rudolph <patrick.rudolph@...ements.com>,
linux-hwmon@...r.kernel.org
Subject: [PATCH v3 4/5] hwmon: pmbus: zl6100: Use generic code
Use generic pmbus bus access delay.
Signed-off-by: Patrick Rudolph <patrick.rudolph@...ements.com>
---
Changelog v2:
- Drop now unused variables to make it compile
Changelog v3:
- Added changelog
drivers/hwmon/pmbus/zl6100.c | 66 +++++-------------------------------
1 file changed, 8 insertions(+), 58 deletions(-)
diff --git a/drivers/hwmon/pmbus/zl6100.c b/drivers/hwmon/pmbus/zl6100.c
index 83458df0d0cf..7920a16203e1 100644
--- a/drivers/hwmon/pmbus/zl6100.c
+++ b/drivers/hwmon/pmbus/zl6100.c
@@ -22,8 +22,6 @@ enum chips { zl2004, zl2005, zl2006, zl2008, zl2105, zl2106, zl6100, zl6105,
struct zl6100_data {
int id;
- ktime_t access; /* chip access time */
- int delay; /* Delay between chip accesses in uS */
struct pmbus_driver_info info;
};
@@ -122,16 +120,6 @@ static u16 zl6100_d2l(long val)
return (mantissa & 0x7ff) | ((exponent << 11) & 0xf800);
}
-/* Some chips need a delay between accesses */
-static inline void zl6100_wait(const struct zl6100_data *data)
-{
- if (data->delay) {
- s64 delta = ktime_us_delta(ktime_get(), data->access);
- if (delta < data->delay)
- udelay(data->delay - delta);
- }
-}
-
static int zl6100_read_word_data(struct i2c_client *client, int page,
int phase, int reg)
{
@@ -174,9 +162,7 @@ static int zl6100_read_word_data(struct i2c_client *client, int page,
break;
}
- zl6100_wait(data);
ret = pmbus_read_word_data(client, page, phase, vreg);
- data->access = ktime_get();
if (ret < 0)
return ret;
@@ -195,14 +181,11 @@ static int zl6100_read_word_data(struct i2c_client *client, int page,
static int zl6100_read_byte_data(struct i2c_client *client, int page, int reg)
{
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
- struct zl6100_data *data = to_zl6100_data(info);
int ret, status;
if (page >= info->pages)
return -ENXIO;
- zl6100_wait(data);
-
switch (reg) {
case PMBUS_VIRT_STATUS_VMON:
ret = pmbus_read_byte_data(client, 0,
@@ -225,7 +208,6 @@ static int zl6100_read_byte_data(struct i2c_client *client, int page, int reg)
ret = pmbus_read_byte_data(client, page, reg);
break;
}
- data->access = ktime_get();
return ret;
}
@@ -234,8 +216,7 @@ static int zl6100_write_word_data(struct i2c_client *client, int page, int reg,
u16 word)
{
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
- struct zl6100_data *data = to_zl6100_data(info);
- int ret, vreg;
+ int vreg;
if (page >= info->pages)
return -ENXIO;
@@ -265,27 +246,7 @@ static int zl6100_write_word_data(struct i2c_client *client, int page, int reg,
vreg = reg;
}
- zl6100_wait(data);
- ret = pmbus_write_word_data(client, page, vreg, word);
- data->access = ktime_get();
-
- return ret;
-}
-
-static int zl6100_write_byte(struct i2c_client *client, int page, u8 value)
-{
- const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
- struct zl6100_data *data = to_zl6100_data(info);
- int ret;
-
- if (page >= info->pages)
- return -ENXIO;
-
- zl6100_wait(data);
- ret = pmbus_write_byte(client, page, value);
- data->access = ktime_get();
-
- return ret;
+ return pmbus_write_word_data(client, page, vreg, word);
}
static const struct i2c_device_id zl6100_id[] = {
@@ -363,14 +324,7 @@ static int zl6100_probe(struct i2c_client *client)
* supported chips are known to require a wait time between I2C
* accesses.
*/
- data->delay = delay;
-
- /*
- * Since there was a direct I2C device access above, wait before
- * accessing the chip again.
- */
- data->access = ktime_get();
- zl6100_wait(data);
+ udelay(delay);
info = &data->info;
@@ -404,8 +358,7 @@ static int zl6100_probe(struct i2c_client *client)
if (ret < 0)
return ret;
- data->access = ktime_get();
- zl6100_wait(data);
+ udelay(delay);
if (ret & ZL8802_MFR_PHASES_MASK)
info->func[1] |= PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
@@ -418,8 +371,7 @@ static int zl6100_probe(struct i2c_client *client)
if (ret < 0)
return ret;
- data->access = ktime_get();
- zl6100_wait(data);
+ udelay(delay);
ret = i2c_smbus_read_word_data(client, ZL8802_MFR_USER_CONFIG);
if (ret < 0)
@@ -428,8 +380,7 @@ static int zl6100_probe(struct i2c_client *client)
if (ret & ZL8802_MFR_XTEMP_ENABLE_2)
info->func[i] |= PMBUS_HAVE_TEMP2;
- data->access = ktime_get();
- zl6100_wait(data);
+ udelay(delay);
}
ret = i2c_smbus_read_word_data(client, ZL8802_MFR_USER_GLOBAL_CONFIG);
if (ret < 0)
@@ -446,13 +397,12 @@ static int zl6100_probe(struct i2c_client *client)
info->func[0] |= PMBUS_HAVE_TEMP2;
}
- data->access = ktime_get();
- zl6100_wait(data);
+ udelay(delay);
+ info->access_delay = delay;
info->read_word_data = zl6100_read_word_data;
info->read_byte_data = zl6100_read_byte_data;
info->write_word_data = zl6100_write_word_data;
- info->write_byte = zl6100_write_byte;
return pmbus_do_probe(client, info);
}
--
2.45.2
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