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Date: Thu, 10 Aug 2017 01:11:29 +0000
From: "Mani, Rajmohan" <rajmohan.mani@...el.com>
To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
CC: Lee Jones <lee.jones@...aro.org>,
Linus Walleij <linus.walleij@...aro.org>,
Alexandre Courbot <gnurou@...il.com>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
Len Brown <lenb@...nel.org>,
"sakari.ailus@...ux.intel.com" <sakari.ailus@...ux.intel.com>,
"Andy Shevchenko" <andy.shevchenko@...il.com>
Subject: RE: [PATCH v6 0/3] TPS68470 PMIC drivers
Hi All,
Now that Lee has applied the MFD patch (https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git/commit/?h=for-mfd-next&id=6a58f36b0c49c8179804bead579f5ff6304f0245), can someone help clarify the next steps for the GPIO and ACPI / PMIC OpRegion patches of this series?
Both these patches depend on the MFD patch (MFD_TPS68470 config option) to compile.
Thanks
Raj
> -----Original Message-----
> From: Mani, Rajmohan
> Sent: Friday, July 28, 2017 5:30 PM
> To: linux-kernel@...r.kernel.org; linux-gpio@...r.kernel.org; linux-
> acpi@...r.kernel.org
> Cc: Lee Jones <lee.jones@...aro.org>; Linus Walleij
> <linus.walleij@...aro.org>; Alexandre Courbot <gnurou@...il.com>; Rafael
> J. Wysocki <rjw@...ysocki.net>; Len Brown <lenb@...nel.org>;
> sakari.ailus@...ux.intel.com; Andy Shevchenko
> <andy.shevchenko@...il.com>; Mani, Rajmohan
> <rajmohan.mani@...el.com>
> Subject: [PATCH v6 0/3] TPS68470 PMIC drivers
>
> This is the patch series for TPS68470 PMIC that works as a camera PMIC.
>
> The patch series provide the following 3 drivers, to help configure the voltage
> regulators, clocks and GPIOs provided by the TPS68470 PMIC, to be able to
> use the camera sensors connected to this PMIC.
>
> TPS68470 MFD driver:
> This is the multi function driver that initializes the TPS68470 PMIC and
> supports the GPIO and Op Region functions.
>
> TPS68470 GPIO driver:
> This is the PMIC GPIO driver that will be used by the OS GPIO layer, when the
> BIOS / firmware triggered GPIO access is done.
>
> TPS68470 Op Region driver:
> This is the driver that will be invoked, when the BIOS / firmware configures
> the voltage / clock for the sensors / vcm devices connected to the PMIC.
>
> ---
>
> Update on 2 GPIO chips implementation over 1:
> - Attempted to implement 2 GPIO chips, but ran into couple of
> issues in the kernel, so we couldn't get it to work.
> - It was decided to postpone this change, since it is not
> critical
>
> Changes in v6:
> - MFD driver:
> - Used non-zero return values from regmap_write/read() calls
> to detect error conditions
>
> Changes in v5:
> - MFD driver:
> - Fixed Kconfig description text
> - Addressed other comments from Lee, related to formatting
>
> - GPIO driver:
> - Formatted the file header text
>
> - Opregion driver:
> - Formatted the file header text
>
> Changes in v4:
> - MFD driver:
> - Removed board specific code and FIXME comment
> - Moved i2c.h include from tps68470.h to tps68470.c
> - Moved the TPS68470 REVID read code after PMIC reset
> - Fixed typo in debug error message (on failure of
> devm_mfd_add_devices() )
> - Enhanced dependency on I2C by changing it to I2C=y
> (to fix build errors if I2C is built as module
> e.g tps68470.c:71: undefined reference to
> `__devm_regmap_init_i2c'
> tps68470.c:117: undefined reference to `i2c_register_driver')
> - Removed most of the unused header file definitions
> - Moved devm_mfd_add_devices() after PMIC resett
> - Used probe_new() and removed i2c_device_id table
>
> The following patch from Andy is needed for the driver to be
> probed.
> http://marc.info/?l=linux-acpi&m=150030081523885&w=2
>
> - GPIO driver:
> - Added newline at the end of Kconfig description
> - Updated commit message about the descriptive
> names for the GPIOs and the typical usage model
> of the GPIO driver
>
> - Opregion driver:
> - Added dependency on MFD_TPS68470
> - Converted 2 liner into one line code
>
> Changes in v3:
> - MFD driver:
> - Removed GPIO lookup table
> - Reverted to probe() for consistency
> - Addressed other comments from Andy
>
> - GPIO driver:
> - Removed the code that initializes the default values
> of GPIOs to zeros
> - Used gpiochip_get_data() to access data inside the gpio_chip
>
> Changes in v2:
> - MFD driver:
> - Removed tps68470_* wrappers around regmap_* calls
> - Removed "struct tps68470"
> - used devm_mfd_add_devices and removed mutex in mfd driver
> - Added reasoning about the need of having mfd driver
> as bool/builtin
>
> - Opregion driver:
> - renamed opregion driver file / internal symbol names
> with tps68470_pmic*
> - Made opregion driver tables as const
> - Removed unused *handler_context in common handler
> - Replaced "int" with "unsigned int"
> - Changed to WARN macro to dev_warn()
> - Destroyed mutex on error
> - Added reasoning about the need of having Opregion driver
> as bool/builtin
>
> - GPIO driver:
> - Implemented get_direction() in the GPIO driver
> - Setup gpio_chip.names
> - Moved the GPIO lookup table code inside mfd driver
> - Added reasoning about the need of having GPIO driver
> as bool/builtin
>
> ---
>
> Rajmohan Mani (3):
> mfd: Add new mfd device TPS68470
> gpio: Add support for TPS68470 GPIOs
> ACPI / PMIC: Add TI PMIC TPS68470 operation region driver
>
> drivers/acpi/Kconfig | 16 ++
> drivers/acpi/Makefile | 2 +
> drivers/acpi/pmic/tps68470_pmic.c | 455
> ++++++++++++++++++++++++++++++++++++++
> drivers/gpio/Kconfig | 15 ++
> drivers/gpio/Makefile | 1 +
> drivers/gpio/gpio-tps68470.c | 176 +++++++++++++++
> drivers/mfd/Kconfig | 18 ++
> drivers/mfd/Makefile | 1 +
> drivers/mfd/tps68470.c | 106 +++++++++
> include/linux/mfd/tps68470.h | 97 ++++++++
> 10 files changed, 887 insertions(+)
> create mode 100644 drivers/acpi/pmic/tps68470_pmic.c create mode
> 100644 drivers/gpio/gpio-tps68470.c create mode 100644
> drivers/mfd/tps68470.c create mode 100644 include/linux/mfd/tps68470.h
>
> --
> 1.9.1
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