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Message-ID: <20250911100043.GH9224@google.com> Date: Thu, 11 Sep 2025 11:00:43 +0100 From: Lee Jones <lee@...nel.org> To: a0282524688@...il.com Cc: tmyu0@...oton.com, linus.walleij@...aro.org, brgl@...ev.pl, andi.shyti@...nel.org, mkl@...gutronix.de, mailhol.vincent@...adoo.fr, andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, wim@...ux-watchdog.org, linux@...ck-us.net, jdelvare@...e.com, alexandre.belloni@...tlin.com, linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org, linux-i2c@...r.kernel.org, linux-can@...r.kernel.org, netdev@...r.kernel.org, linux-watchdog@...r.kernel.org, linux-hwmon@...r.kernel.org, linux-rtc@...r.kernel.org, linux-usb@...r.kernel.org Subject: Re: [PATCH RESEND v14 0/7] Add Nuvoton NCT6694 MFD drivers On Thu, 04 Sep 2025, a0282524688@...il.com wrote: > From: Ming Yu <a0282524688@...il.com> > > This patch series introduces support for Nuvoton NCT6694, a peripheral > expander based on USB interface. It models the chip as an MFD driver > (1/7), GPIO driver(2/7), I2C Adapter driver(3/7), CANfd driver(4/7), > WDT driver(5/7), HWMON driver(6/7), and RTC driver(7/7). > > The MFD driver implements USB device functionality to issue > custom-define USB bulk pipe packets for NCT6694. Each child device can > use the USB functions nct6694_read_msg() and nct6694_write_msg() to issue > a command. They can also request interrupt that will be called when the > USB device receives its interrupt pipe. > > The following introduces the custom-define USB transactions: > nct6694_read_msg - Send bulk-out pipe to write request packet > Receive bulk-in pipe to read response packet > Receive bulk-in pipe to read data packet > > nct6694_write_msg - Send bulk-out pipe to write request packet > Send bulk-out pipe to write data packet > Receive bulk-in pipe to read response packet > Receive bulk-in pipe to read data packet > > Changes since version 13: > - Update to guard(spinlock_irqsave)() in nct6694.c > - Add struct i2c_adapter_quirks in i2c-nct6694.c > - Rebased on top of v6.17-rc1 as requested I thought you were going to rebase this onto v6.17-rc1? It still does not apply. > Changes since version 12: > - Implement IDA in MFD driver to handle per-device IDs > - Use spinlock to replace irq mutex lock > - Use same email address in the signature > > Changes since version 11: > - Use platform_device's id to replace IDA > - Modify the irq_domain_add_simple() to irq_domain_create_simple() in > nct6694.c > - Update struct data_bittiming_params related part in nct6694_canfd.c > - Fix the typo in the header in nct6694-hwmon.c > > Changes since version 10: > - Add change log for each patch > - Fix mfd_cell to MFD_CELL_NAME() in nct6694.c > - Implement IDA to allocate id in gpio-nct6694.c, i2c-nct6694.c, > nct6694_canfd.c and nct6694_wdt.c > - Add header <linux/bitfield.h> in nct6694_canfd.c > - Add support to config tdc in nct6694_canfd.c > - Add module parameters to configure WDT's timeout and pretimeout value > in nct6694_wdt.c > > Changes since version 9: > - Add devm_add_action_or_reset() to dispose irq mapping > - Add KernelDoc to exported functions in nct6694.c > > Changes since version 8: > - Modify the signed-off-by with my work address > - Rename all MFD cell names to "nct6694-xxx" > - Add irq_dispose_mapping() in the error handling path and in the remove > function > - Fix some comments in nct6694.c and in nct6694.h > - Add module parameters to configure I2C's baudrate in i2c-nct6694.c > - Rename all function names nct6694_can_xxx to nct6694_canfd_xxx in > nct6694_canfd.c > - Fix nct6694_canfd_handle_state_change() in nct6694_canfd.c > - Fix nct6694_canfd_start() to configure NBTP and DBTP in nct6694_canfd.c > - Add can_set_static_ctrlmode() in nct6694_canfd.c > > Changes since version 7: > - Add error handling for devm_mutex_init() > - Modify the name of the child devices CAN1 and CAN2 to CAN0 and CAN1. > - Fix multiline comments to net-dev style in nct6694_canfd.c > > Changes since version 6: > - Fix nct6694_can_handle_state_change() in nct6694_canfd.c > - Fix warnings in nct6694_canfd.c > - Move the nct6694_can_priv's bec to the end in nct6694_canfd.c > - Fix warning in nct6694_wdt.c > - Fix temp_hyst's data type to signed variable in nct6694-hwmon.c > > Changes since version 5: > - Modify the module name and the driver name consistently > - Fix mfd_cell to MFD_CELL_NAME() and MFD_CELL_BASIC() > - Drop unnecessary macros in nct6694.c > - Update private data and drop mutex in nct6694_canfd.c > - Fix nct6694_can_handle_state_change() in nct6694_canfd.c > > Changes since version 4: > - Modify arguments in read/write function to a pointer to cmd_header > - Modify all callers that call the read/write function > - Move the nct6694_canfd.c to drivers/net/can/usb/ > - Fix the missing rx offload function in nct6694_canfd.c > - Fix warngings in nct6694-hwmon.c > > Changes since version 3: > - Modify array buffer to structure for each drivers > - Fix defines and comments for each drivers > - Add header <linux/bits.h> and use BIT macro in nct6694.c and > gpio-nct6694.c > - Modify mutex_init() to devm_mutex_init() > - Add rx-offload helper in nct6694_canfd.c > - Drop watchdog_init_timeout() in nct6694_wdt.c > - Modify the division method to DIV_ROUND_CLOSEST() in nct6694-hwmon.c > - Drop private mutex and use rtc core lock in rtc-nct6694.c > - Modify device_set_wakeup_capable() to device_init_wakeup() in > rtc-nct6694.c > > Changes since version 2: > - Add MODULE_ALIAS() for each child driver > - Modify gpio line names be a local variable in gpio-nct6694.c > - Drop unnecessary platform_get_drvdata() in gpio-nct6694.c > - Rename each command in nct6694_canfd.c > - Modify each function name consistently in nct6694_canfd.c > - Modify the pretimeout validation procedure in nct6694_wdt.c > - Fix warnings in nct6694-hwmon.c > > Changes since version 1: > - Implement IRQ domain to handle IRQ demux in nct6694.c > - Modify USB_DEVICE to USB_DEVICE_AND_INTERFACE_INFO API in nct6694.c > - Add each driver's command structure > - Fix USB functions in nct6694.c > - Fix platform driver registration in each child driver > - Sort each driver's header files alphabetically > - Drop unnecessary header in gpio-nct6694.c > - Add gpio line names in gpio-nct6694.c > - Fix errors and warnings in nct6694_canfd.c > - Fix TX-flow control in nct6694_canfd.c > - Fix warnings in nct6694_wdt.c > - Drop unnecessary logs in nct6694_wdt.c > - Modify start() function to setup device in nct6694_wdt.c > - Add voltage sensors functionality in nct6694-hwmon.c > - Add temperature sensors functionality in nct6694-hwmon.c > - Fix overwrite error return values in nct6694-hwmon.c > - Add write value limitation for each write() function in nct6694-hwmon.c > - Drop unnecessary logs in rtc-nct6694.c > - Fix overwrite error return values in rtc-nct6694.c > - Modify to use dev_err_probe API in rtc-nct6694.c > > > Ming Yu (7): > mfd: Add core driver for Nuvoton NCT6694 > gpio: Add Nuvoton NCT6694 GPIO support > i2c: Add Nuvoton NCT6694 I2C support > can: Add Nuvoton NCT6694 CANFD support > watchdog: Add Nuvoton NCT6694 WDT support > hwmon: Add Nuvoton NCT6694 HWMON support > rtc: Add Nuvoton NCT6694 RTC support > > MAINTAINERS | 12 + > drivers/gpio/Kconfig | 12 + > drivers/gpio/Makefile | 1 + > drivers/gpio/gpio-nct6694.c | 499 +++++++++++++++ > drivers/hwmon/Kconfig | 10 + > drivers/hwmon/Makefile | 1 + > drivers/hwmon/nct6694-hwmon.c | 949 ++++++++++++++++++++++++++++ > drivers/i2c/busses/Kconfig | 10 + > drivers/i2c/busses/Makefile | 1 + > drivers/i2c/busses/i2c-nct6694.c | 196 ++++++ > drivers/mfd/Kconfig | 15 + > drivers/mfd/Makefile | 2 + > drivers/mfd/nct6694.c | 388 ++++++++++++ > drivers/net/can/usb/Kconfig | 11 + > drivers/net/can/usb/Makefile | 1 + > drivers/net/can/usb/nct6694_canfd.c | 832 ++++++++++++++++++++++++ > drivers/rtc/Kconfig | 10 + > drivers/rtc/Makefile | 1 + > drivers/rtc/rtc-nct6694.c | 297 +++++++++ > drivers/watchdog/Kconfig | 11 + > drivers/watchdog/Makefile | 1 + > drivers/watchdog/nct6694_wdt.c | 307 +++++++++ > include/linux/mfd/nct6694.h | 102 +++ > 23 files changed, 3669 insertions(+) > create mode 100644 drivers/gpio/gpio-nct6694.c > create mode 100644 drivers/hwmon/nct6694-hwmon.c > create mode 100644 drivers/i2c/busses/i2c-nct6694.c > create mode 100644 drivers/mfd/nct6694.c > create mode 100644 drivers/net/can/usb/nct6694_canfd.c > create mode 100644 drivers/rtc/rtc-nct6694.c > create mode 100644 drivers/watchdog/nct6694_wdt.c > create mode 100644 include/linux/mfd/nct6694.h > > -- > 2.34.1 > -- Lee Jones [李琼斯]
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