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rtc: pcf2127: fix SPI command byte for PCF2131

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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: afc505bf90 ("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>
This commit is contained in:
Elena Popa
2025-05-30 13:40:00 +03:00
committed by Greg Kroah-Hartman
parent 1cb814dbb0
commit 5cdd1f7340
1 changed files with 5 additions and 0 deletions
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5
drivers/rtc/rtc-pcf2127.c
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@@ -1383,6 +1383,11 @@ static int pcf2127_i2c_probe(struct i2c_client *client)
variant = &pcf21xx_cfg[type]; variant = &pcf21xx_cfg[type];
} }
if (variant->type == PCF2131) {
config.read_flag_mask = 0x0;
config.write_flag_mask = 0x0;
}
config.max_register = variant->max_register, config.max_register = variant->max_register,
regmap = devm_regmap_init(&client->dev, &pcf2127_i2c_regmap, regmap = devm_regmap_init(&client->dev, &pcf2127_i2c_regmap,