Hello all Apologies for the long delay since the last version of this series; the time I had free to work on it became somewhat restrained. v1 for this series was originally 14-18 of this series: https://lore.kernel.org/linux-media/20201130133129.1024662-1-djrscally@xxxxxxxxx/T/#m91934e12e3d033da2e768e952ea3b4a125ee3e67 v2 was here: https://lore.kernel.org/platform-driver-x86/20210118003428.568892-1-djrscally@xxxxxxxxx/ v3 was here: https://lore.kernel.org/lkml/20210222130735.1313443-1-djrscally@xxxxxxxxx/ Series level changelog: - Added patch 5/8 to make clkdev_drop() NULL aware to simplify error handling. - Added patch 6/8 to add acpi_gpio_get_io_resource(). This has been tested on a number of devices, but currently **not** on a device designed for ChromeOS, which we ideally need to do to ensure no regression caused by replacing the tps68470 MFD driver. Unfortunately, I don't have a device to test it on myself. =========== Original Cover Letter =========== At the moment in the kernel the ACPI _HID INT3472 is taken by the tps68470 MFD driver, but that driver can only handle some of the cases of that _HID that we see. There are at least these three possibilities: 1. INT3472 devices that provide GPIOs through the usual framework and run power and clocks through an operation region; this is the situation that the current module handles and is seen on ChromeOS devices 2. INT3472 devices that provide GPIOs, plus clocks and regulators that are meant to be driven through the usual frameworks, usually seen on devices designed to run Windows 3. INT3472 devices that don't actually represent a physical tps68470, but are being used as a convenient way of grouping a bunch of system GPIO lines that are intended to enable power and clocks for sensors which are called out as dependent on them. Also seen on devices designed to run Windows. This series introduces a new module which registers: 1. An i2c driver that determines which scenario (#1 or #2) applies to the machine and registers platform devices to be bound to GPIO, OpRegion, clock and regulator drivers as appropriate. 2. A platform driver that binds to the dummy INT3472 devices described in #3 The platform driver for the dummy device registers the GPIO lines that enable the clocks and regulators to the sensors via those frameworks so that sensor drivers can consume them in the usual fashion. The existing GPIO and OpRegion tps68470 drivers will work with the i2c driver that's registered. Clock and regulator drivers are available but have not so far been tested, so aren't part of this series. The existing mfd/tps68470.c driver being thus superseded, it is removed. Thanks Dan Daniel Scally (8): ACPI: scan: Extend acpi_walk_dep_device_list() ACPI: scan: Add function to fetch dependent of acpi device i2c: core: Add a format macro for I2C device names gpiolib: acpi: Export acpi_get_gpiod() clkdev: Make clkdev_drop() null aware gpiolib: acpi: Add acpi_gpio_get_io_resource() platform/x86: Add intel_skl_int3472 driver mfd: tps68470: Remove tps68470 MFD driver MAINTAINERS | 5 + drivers/acpi/ec.c | 2 +- drivers/acpi/pmic/Kconfig | 2 +- drivers/acpi/pmic/intel_pmic_chtdc_ti.c | 2 +- drivers/acpi/scan.c | 107 ++++- drivers/clk/clkdev.c | 3 + drivers/gpio/Kconfig | 2 +- drivers/gpio/gpiolib-acpi.c | 61 ++- drivers/i2c/i2c-core-acpi.c | 8 +- drivers/i2c/i2c-core-base.c | 4 +- drivers/mfd/Kconfig | 18 - drivers/mfd/Makefile | 1 - drivers/mfd/tps68470.c | 97 ----- drivers/platform/surface/aggregator/core.c | 6 +- drivers/platform/surface/surface3_power.c | 22 +- .../platform/surface/surface_acpi_notify.c | 7 +- drivers/platform/x86/Kconfig | 2 + drivers/platform/x86/Makefile | 1 + drivers/platform/x86/intel-int3472/Kconfig | 31 ++ drivers/platform/x86/intel-int3472/Makefile | 5 + .../intel_skl_int3472_clk_and_regulator.c | 195 +++++++++ .../intel-int3472/intel_skl_int3472_common.c | 106 +++++ .../intel-int3472/intel_skl_int3472_common.h | 113 +++++ .../intel_skl_int3472_discrete.c | 409 ++++++++++++++++++ .../intel_skl_int3472_tps68470.c | 109 +++++ include/acpi/acpi_bus.h | 8 + include/linux/acpi.h | 11 +- include/linux/gpio/consumer.h | 2 + include/linux/i2c.h | 3 + 29 files changed, 1175 insertions(+), 167 deletions(-) delete mode 100644 drivers/mfd/tps68470.c create mode 100644 drivers/platform/x86/intel-int3472/Kconfig create mode 100644 drivers/platform/x86/intel-int3472/Makefile create mode 100644 drivers/platform/x86/intel-int3472/intel_skl_int3472_clk_and_regulator.c create mode 100644 drivers/platform/x86/intel-int3472/intel_skl_int3472_common.c create mode 100644 drivers/platform/x86/intel-int3472/intel_skl_int3472_common.h create mode 100644 drivers/platform/x86/intel-int3472/intel_skl_int3472_discrete.c create mode 100644 drivers/platform/x86/intel-int3472/intel_skl_int3472_tps68470.c -- 2.25.1
