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[73.228.159.35]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7d3ffdb190esm576783085a.86.2025.06.25.09.41.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Jun 2025 09:41:25 -0700 (PDT) From: Alex Elder To: lee@kernel.org, lgirdwood@gmail.com, broonie@kernel.org, alexandre.belloni@bootlin.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Cc: mat.jonczyk@o2.pl, dlan@gentoo.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, troymitchell988@gmail.com, linux-rtc@vger.kernel.org, devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH v4 2/7] mfd: simple-mfd-i2c: add SpacemiT P1 support Date: Wed, 25 Jun 2025 11:41:13 -0500 Message-ID: <20250625164119.1068842-3-elder@riscstar.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20250625164119.1068842-1-elder@riscstar.com> References: <20250625164119.1068842-1-elder@riscstar.com> Precedence: bulk X-Mailing-List: spacemit@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- v4: - Add a dependency on I2C, to avoid a CROSS_COMPILE build error drivers/mfd/Kconfig | 11 +++++++++++ drivers/mfd/simple-mfd-i2c.c | 18 ++++++++++++++++++ 2 files changed, 29 insertions(+) diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 6fb3768e3d71c..01805c3eec57d 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1182,6 +1182,17 @@ 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 I2C + 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 diff --git a/drivers/mfd/simple-mfd-i2c.c b/drivers/mfd/simple-mfd-i2c.c index 22159913bea03..026cd92e20ad3 100644 --- a/drivers/mfd/simple-mfd-i2c.c +++ b/drivers/mfd/simple-mfd-i2c.c @@ -93,12 +93,30 @@ 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, + .max_register = 0xaa, +}; + +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}, { .compatible = "maxim,max5970", .data = &maxim_max5970}, { .compatible = "maxim,max5978", .data = &maxim_max5970}, { .compatible = "maxim,max77705-battery", .data = &maxim_mon_max77705}, + { .compatible = "spacemit,p1", .data = &spacemit_p1, }, {} }; MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match); -- 2.45.2