[PATCH 6.6 237/283] mfd: simple-mfd-i2c: Add MAX77705 support

Sasha Levin
2026-02-28T18:10:28Z

From: Dzmitry Sankouski <dsankouski@gmail.com>

[ Upstream commit 7b591ef98b3fc1ce20c3ccb86715429b72e2e6f0 ]

Add MAX77705 support - fuel gauge and hwmon devices.
Hwmon provides charger input and system bus measurements.

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250123-starqltechn_integration_upstream-v17-4-8b06685b6612@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>
Stable-dep-of: 8f34c1a64c53 ("mfd: simple-mfd-i2c: Add Delta TN48M CPLD support")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/mfd/simple-mfd-i2c.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/drivers/mfd/simple-mfd-i2c.c b/drivers/mfd/simple-mfd-i2c.c
index 6eda79533208a..22159913bea03 100644
--- a/drivers/mfd/simple-mfd-i2c.c
+++ b/drivers/mfd/simple-mfd-i2c.c
@@ -83,11 +83,22 @@ static const struct simple_mfd_data maxim_max5970 = {
.mfd_cell_size = ARRAY_SIZE(max5970_cells),
};

+static const struct mfd_cell max77705_sensor_cells[] = {
+ { .name = "max77705-battery" },
+ { .name = "max77705-hwmon", },
+};
+
+static const struct simple_mfd_data maxim_mon_max77705 = {
+ .mfd_cell = max77705_sensor_cells,
+ .mfd_cell_size = ARRAY_SIZE(max77705_sensor_cells),
+};
+
static const struct of_device_id simple_mfd_i2c_of_match[] = {
{ .compatible = "kontron,sl28cpld" },
{ .compatible = "silergy,sy7636a", .data = &silergy_sy7636a},
{ .compatible = "maxim,max5970", .data = &maxim_max5970},
{ .compatible = "maxim,max5978", .data = &maxim_max5970},
+ { .compatible = "maxim,max77705-battery", .data = &maxim_mon_max77705},
{}
};
MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match);
--
2.51.0