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Thu, 24 Jul 2025 13:25:14 -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, linux.amoon@gmail.com, troymitchell988@gmail.com, guodong@riscstar.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 v9 0/8] spacemit: introduce P1 PMIC support Date: Thu, 24 Jul 2025 15:25:01 -0500 Message-ID: <20250724202511.499288-1-elder@riscstar.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-rtc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The SpacemiT P1 is an I2C-controlled PMIC that implements 6 buck converters and 12 LDOs. It contains a load switch, ADC channels, GPIOs, a real-time clock, and a watchdog timer. This series introduces a multifunction driver for the P1 PMIC as well as drivers for its regulators and RTC. Version 8 provided the ability in "simple-mfd-i2c.c" to specify the max_register value for the regmap configuration as an alternative to providing a "full" regmap structure. Lee Jones asked that the max_register value take precedence if the regmap_config was also provided. This version changes a few things from v8: - Alexandre Belloni's ack is added to patch 5. - The max_register value in simple_mfd_data is always used if it is non-zero, as requested by Lee Jones. - The global regmap_config_8r_8v structure is back to being const again. - A new function simple_regmap_config() has been added in patch 2 to encapsulate the logic that determines what regmap_config structure will be used. - It uses regmap_config_8r_8v if simple_mfd_data is not supplied for some reason. - It uses regmap_config_8r_8v if the simple_mfd_data defines neither regmap_config nor max_register. - Otherwise, it dynamically allocates a regmap_config structure. If simple_mfd_data refers to a regmap_config structure, it is copied into the allocated struct; otherwise regmap_config_8r_8v is copied. - Finally, if the simple_mfd_data structure provides a non-zero max_register value, it is used in the regmap_config. - A small duplicated comment in "simple-mfd-i2c.h" is removed. -Alex This series is available here: https://github.com/riscstar/linux/tree/outgoing/pmic-v9 Between version 8 and version 9: - The max_config value is always used if it is provided with the simple_mfd_data structure. - The regmap_config structure used is allocated dynamically if necessary; otherwise regmap_config_8r_8v is used. - A small duplicated comment is removed Here is version 8 of this series: https://lore.kernel.org/lkml/20250710175107.1280221-1-elder@riscstar.com/ Between version 7 and version 8: - Change the global regmap_config to not be const in patch 2. Here is version 7 of this series: https://lore.kernel.org/lkml/20250702213658.545163-1-elder@riscstar.com/ Between version 6 and version 7: - Revise patch 2 to preserve the option to provide a full regmap config Here is version 6 of this series: https://lore.kernel.org/lkml/20250627142309.1444135-1-elder@riscstar.com/ Between version 5 and version 6: - Added Rob Herring's reviewed-by to patch 1 - Add the simple MFD functionality suggested by Lee Jones - Update patch 3 (previously 2) accordingly Here is version 5 of this series: https://lore.kernel.org/lkml/20250625164119.1068842-1-elder@riscstar.com/ Between version 4 and version 5: - Only check the seconds register for change when looping on read - Return without re-enabling the RTC if writing registers fails - If the RTC is disabled when reading, return an error Here is version 4 of this series: https://lore.kernel.org/lkml/20250625164119.1068842-1-elder@riscstar.com/ More complete history is available at that link. Alex Elder (8): dt-bindings: mfd: add support the SpacemiT P1 PMIC mfd: simple-mfd-i2c: specify max_register mfd: simple-mfd-i2c: add SpacemiT P1 support regulator: spacemit: support SpacemiT P1 regulators rtc: spacemit: support the SpacemiT P1 RTC riscv: dts: spacemit: enable the i2c8 adapter riscv: dts: spacemit: define fixed regulators riscv: dts: spacemit: define regulator constraints .../devicetree/bindings/mfd/spacemit,p1.yaml | 86 +++++++++ .../boot/dts/spacemit/k1-bananapi-f3.dts | 138 +++++++++++++++ arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi | 7 + arch/riscv/boot/dts/spacemit/k1.dtsi | 11 ++ drivers/mfd/Kconfig | 11 ++ drivers/mfd/simple-mfd-i2c.c | 50 +++++- drivers/mfd/simple-mfd-i2c.h | 5 +- drivers/regulator/Kconfig | 12 ++ drivers/regulator/Makefile | 1 + drivers/regulator/spacemit-p1.c | 157 ++++++++++++++++ drivers/rtc/Kconfig | 10 ++ drivers/rtc/Makefile | 1 + drivers/rtc/rtc-spacemit-p1.c | 167 ++++++++++++++++++ 13 files changed, 647 insertions(+), 9 deletions(-) create mode 100644 Documentation/devicetree/bindings/mfd/spacemit,p1.yaml create mode 100644 drivers/regulator/spacemit-p1.c create mode 100644 drivers/rtc/rtc-spacemit-p1.c base-commit: 9ee814bd78e315e4551223ca7548dd3f6bdcf1ae -- 2.43.0