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hwmon: (jc42) Convert register access and caching to regmap/regcache

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Switch the jc42 driver to use an I2C regmap to access the registers.
Also move over to regmap's built-in caching instead of adding a
custom caching implementation. This works for JC42_REG_TEMP_UPPER,
JC42_REG_TEMP_LOWER and JC42_REG_TEMP_CRITICAL as these values never
change except when explicitly written. The cache For JC42_REG_TEMP is
dropped (regmap can't cache it because it's volatile, meaning it can
change at any time) as well for simplicity and consistency with other
drivers.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20221023213157.11078-2-martin.blumenstingl@googlemail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Martin Blumenstingl
2022-10-23 23:31:56 +02:00
committed by Guenter Roeck
parent 662d20b3a5
commit 8f2fa4726f
2 changed files with 132 additions and 102 deletions
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drivers/hwmon/Kconfig
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@@ -807,6 +807,7 @@ config SENSORS_IT87
config SENSORS_JC42
tristate "JEDEC JC42.4 compliant memory module temperature sensors"
depends on I2C
select REGMAP_I2C
help
If you say yes here, you get support for JEDEC JC42.4 compliant
temperature sensors, which are used on many DDR3 memory modules for