Patch series introducing support for ROHM BD70528 PMIC Please note that patch 2 breaks compilation without patches 3 and 4 ROHM BD70528 is a programmable Power Management IC for battery powered 'ultra low power' systems like the pre-announced NXP i.MX7 ULP. This patch series introduces support for the PMIC. I send this a RFC now as I would like to receive comments from Lee, Mark and Stephen regarding splitting the existing include/linux/mfd/bd718x7.h into ROHM generic and chip specific portions. Benefit is that for example the clk sub-driver does not need to be aware of chip specific structure(s) (struct bd718x7 and struct bd70528) as it only needs to derefernce the generic struct rohm_regmap_dev. Thus same clk subdriver can support both the bd718x7 and bd70528 as long as MFD driver data has this generic structure in the beginning of allocated data. But knowing the bd718x7 driver is already in upstream, it might be good if this change went through single tree, right? Another 'RFC' item is 'main register support' for regmap-irq. This has been initially discussed with Mark in these mail threads Option 1 https://lore.kernel.org/lkml/20181217185014.GH27909@xxxxxxxxxxxxx/ Option 2 https://lore.kernel.org/lkml/20181218085803.GD2477@localhost.localdomain/ But I think it is Ok to show it to wider audience with this real usage example. RTC block of the bd70528 can support 'wake' irq which wakes PMIC from standby state. Wake irq's can be armed to wake up system up to 24 hours from arming. bd70528 can also generate alarm interrupts which can be armed to occur years after triggering. The RTC driver does always arm both the waker and alarm irqs and does not utilize longer period of alarm interrupts. All the RTC timers are limited to occur within the next 24 hours. Any suggestions on more elegant timer support are welcome =) GPIO portion of bd70528 driver adds I/O support for driving GPIO pins or reading the state. The interrupt functionality is provided by regmap-irq. Current GPIO driver is not aware of whether the pin(s) are used for I/O or interrupts and it is up-to driver user to ensure there is no misconfiguration or "double use". Currently only MFD core, clk, RTC and regulator portions are somehow tested. The RFC series also include initial gpio, power-supply and watchdog patches in order to provide better overview on chip and to collect initial feedback. Reset and ADC are not supported by this series. Patch 1: regmap-irq, 'main status register support'. See discussion https://lore.kernel.org/lkml/20181217185014.GH27909@xxxxxxxxxxxxx/ Patch 2: split the bd718x7.h to generic and chip specific portions. (breaks compilation without patch 3 and 4) Patch 3: adapt bd718x7.h changes to bd718x7 regulator driver Patch 4: adapt bd718x7.h changes to bd718x7 clk driver Patch 5: add MFD core support for bd70528 Patch 6: support bd70528 clk using bd718x7 clk driver Patch 7: document DT bindings for BD70528 Patch 8: support bd70528 regulators Patch 9: document regulator DT bindings for BD70528 Patch 10: support BD70528 GPIO block Patch 11: support BD70528 RTC Patch 12: support BD70528 battery charger Patch 13: support BD70528 watchdog This patch series is based on Mark's regulator/for-next branch --- Matti Vaittinen (13): regmap: regmap-irq: Add main status register support mfd: bd718x7.h split to ROHM common and bd718x7 specific parts regulator: bd718x7 use chip specific and generic data structs clk: bd718x7: use chip specific and generic data structs mfd: bd70528: Support ROHM bd70528 PMIC - core clk: bd718x7: Support ROHM BD70528 clk block devicetree: bindings: Document first ROHM BD70528 bindings regulator: bd70528: Support ROHM BD70528 regulator block devicetree: bindings: ROHM bd70528 regulator bindings gpio: Initial support for ROHM bd70528 GPIO block rtc: bd70528: Initial support for ROHM bd70528 RTC power: supply: Initial support for ROHM BD70528 PMIC charger block watchdog: bd70528: Initial support for ROHM BD70528 watchdog block .../devicetree/bindings/mfd/rohm,bd70528-pmic.txt | 104 ++++ .../bindings/regulator/rohm,bd70528-regulator.txt | 68 +++ drivers/base/regmap/regmap-irq.c | 99 ++- drivers/clk/Kconfig | 6 +- drivers/clk/clk-bd718x7.c | 25 +- drivers/gpio/Kconfig | 11 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-bd70528.c | 192 ++++++ drivers/mfd/Kconfig | 17 + drivers/mfd/Makefile | 1 + drivers/mfd/rohm-bd70528.c | 409 +++++++++++++ drivers/mfd/rohm-bd718x7.c | 23 +- drivers/power/supply/Kconfig | 9 + drivers/power/supply/Makefile | 1 + drivers/power/supply/bd70528-charger.c | 670 +++++++++++++++++++++ drivers/regulator/Kconfig | 11 + drivers/regulator/Makefile | 1 + drivers/regulator/bd70528-regulator.c | 290 +++++++++ drivers/regulator/bd718x7-regulator.c | 22 +- drivers/rtc/Kconfig | 8 + drivers/rtc/Makefile | 1 + drivers/rtc/rtc-bd70528.c | 439 ++++++++++++++ drivers/watchdog/Kconfig | 12 + drivers/watchdog/Makefile | 1 + drivers/watchdog/bd70528_wdt.c | 161 +++++ include/linux/mfd/rohm-bd70528.h | 392 ++++++++++++ include/linux/mfd/rohm-bd718x7.h | 22 +- include/linux/mfd/rohm-generic.h | 20 + include/linux/regmap.h | 31 + 29 files changed, 2998 insertions(+), 49 deletions(-) create mode 100644 Documentation/devicetree/bindings/mfd/rohm,bd70528-pmic.txt create mode 100644 Documentation/devicetree/bindings/regulator/rohm,bd70528-regulator.txt create mode 100644 drivers/gpio/gpio-bd70528.c create mode 100644 drivers/mfd/rohm-bd70528.c create mode 100644 drivers/power/supply/bd70528-charger.c create mode 100644 drivers/regulator/bd70528-regulator.c create mode 100644 drivers/rtc/rtc-bd70528.c create mode 100644 drivers/watchdog/bd70528_wdt.c create mode 100644 include/linux/mfd/rohm-bd70528.h create mode 100644 include/linux/mfd/rohm-generic.h -- 2.14.3 -- Matti Vaittinen ROHM Semiconductors ~~~ "I don't think so," said Rene Descartes. Just then, he vanished ~~~
