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mfd: simple-mfd-i2c: Add SpacemiT P1 support

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Enable support for the RTC and regulators found in the SpacemiT P1
PMIC.  Support is implemented by the simple I2C MFD driver.

The P1 PMIC is normally implemented with the SpacemiT K1 SoC.  This
PMIC provides 6 buck converters and 12 LDO regulators.  It also
implements a switch, watchdog timer, real-time clock, and more.
Initially its RTC and regulators are supported.

Signed-off-by: Alex Elder <elder@riscstar.com>
Link: https://lore.kernel.org/r/20250825172057.163883-3-elder@riscstar.com
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Alex Elder 2025-08-25 12:20:51 -05:00 • committed by Lee Jones
parent 8566de1cf6
commit 6fc5d415c1
2 changed files with 30 additions and 0 deletions
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13
drivers/mfd/Kconfig
View file

@ -1254,6 +1254,19 @@ config MFD_QCOM_RPM
Say M here if you want to include support for the Qualcomm RPM as a
module. This will build a module called "qcom_rpm".
config MFD_SPACEMIT_P1
tristate "SpacemiT P1 PMIC"
depends on ARCH_SPACEMIT || COMPILE_TEST
depends on I2C
select I2C_K1
select MFD_SIMPLE_MFD_I2C
help
This option supports the I2C-based SpacemiT P1 PMIC, which
contains regulators, a power switch, GPIOs, an RTC, and more.
This option is selected when any of the supported sub-devices
is configured. The basic functionality is implemented by the
simple MFD I2C driver.
config MFD_SPMI_PMIC
tristate "Qualcomm SPMI PMICs"
depends on ARCH_QCOM || COMPILE_TEST

17
drivers/mfd/simple-mfd-i2c.c
View file

@ -93,6 +93,22 @@ static const struct simple_mfd_data maxim_mon_max77705 = {
.mfd_cell_size = ARRAY_SIZE(max77705_sensor_cells),
};
static const struct regmap_config spacemit_p1_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static const struct mfd_cell spacemit_p1_cells[] = {
{ .name = "spacemit-p1-regulator", },
{ .name = "spacemit-p1-rtc", },
};
static const struct simple_mfd_data spacemit_p1 = {
.regmap_config = &spacemit_p1_regmap_config,
.mfd_cell = spacemit_p1_cells,
.mfd_cell_size = ARRAY_SIZE(spacemit_p1_cells),
};
static const struct of_device_id simple_mfd_i2c_of_match[] = {
{ .compatible = "kontron,sl28cpld" },
{ .compatible = "silergy,sy7636a", .data = &silergy_sy7636a},
@ -101,6 +117,7 @@ static const struct of_device_id simple_mfd_i2c_of_match[] = {
{ .compatible = "maxim,max77705-battery", .data = &maxim_mon_max77705},
{ .compatible = "fsl,lx2160aqds-fpga" },
{ .compatible = "fsl,ls1028aqds-fpga" },
{ .compatible = "spacemit,p1", .data = &spacemit_p1, },
{}
};
MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match);