6.12-stable review patch. If anyone has any objections, please let me know.
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From: Elena Popa elena.popa@nxp.com
commit fa78e9b606a472495ef5b6b3d8b45c37f7727f9d upstream.
PCF2131 was not responding to read/write operations using SPI. PCF2131 has a different command byte definition, compared to PCF2127/29. Added the new command byte definition when PCF2131 is detected.
Fixes: afc505bf9039 ("rtc: pcf2127: add support for PCF2131 RTC") Cc: stable@vger.kernel.org Signed-off-by: Elena Popa elena.popa@nxp.com Acked-by: Hugo Villeneuve hvilleneuve@dimonoff.com Link: https://lore.kernel.org/r/20250530104001.957977-1-elena.popa@nxp.com Signed-off-by: Alexandre Belloni alexandre.belloni@bootlin.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/rtc/rtc-pcf2127.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/drivers/rtc/rtc-pcf2127.c +++ b/drivers/rtc/rtc-pcf2127.c @@ -1383,6 +1383,11 @@ static int pcf2127_i2c_probe(struct i2c_ variant = &pcf21xx_cfg[type]; }
+ if (variant->type == PCF2131) { + config.read_flag_mask = 0x0; + config.write_flag_mask = 0x0; + } + config.max_register = variant->max_register,
regmap = devm_regmap_init(&client->dev, &pcf2127_i2c_regmap,