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path: root/drivers/mfd/rn5t618.c
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2021-06-02mfd: rn5t618: Fix IRQ trigger by changing it to level modeAndreas Kemnade
During more massive generation of interrupts, the IRQ got stuck, and the subdevices did not see any new interrupts. That happens especially at wonky USB supply in combination with ADC reads. To fix that trigger the IRQ at level low instead of falling edge. Fixes: 0c81604516af ("mfd: rn5t618: Add IRQ support") Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2021-04-14mfd: rn5t618: Do not cache various USB related registersAndreas Kemnade
These register get reset to their OTP defaults after USB plugging. And while at it, also add a missing register for detecting the charger type. Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-09-30mfd: rn5t618: Add a power supply subdeviceAndreas Kemnade
The RN5T618 and RC5T619 both have a charger and a fuel gauge, so add a subdevice for it. According to drivers in the wild, things should be at least similar, but since it is not tested, add it only to the RC5T619. Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-08-13mfd: rn5t618: Fix caching of battery related registersAndreas Kemnade
Battery status changes dynamically, so the corresponding registers need to be considered volatile. Affected registers are: - fuel gauge - battery status - battery interrupt Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-08-13mfd: rn5t618: Make restart handler atomic safeAndreas Kemnade
The restart handler is executed during the shutdown phase which is atomic/irq-less. The i2c framework supports atomic transfers since commit 63b96983a5dd ("i2c: core: introduce callbacks for atomic transfers") to address this use case. Using i2c regmap in that situation is not allowed: [ 165.177465] [ BUG: Invalid wait context ] [ 165.181479] 5.8.0-rc3-00003-g0e9088558027-dirty #11 Not tainted [ 165.187400] ----------------------------- [ 165.191410] systemd-shutdow/1 is trying to lock: [ 165.196030] d85b4438 (rn5t618:170:(&rn5t618_regmap_config)->lock){+.+.}-{3:3}, at: regmap_update_bits_base+0x30/0x70 [ 165.206573] other info that might help us debug this: [ 165.211625] context-{4:4} [ 165.214248] 2 locks held by systemd-shutdow/1: [ 165.218691] #0: c131c47c (system_transition_mutex){+.+.}-{3:3}, at: __do_sys_reboot+0x90/0x204 [ 165.227405] #1: c131efb4 (rcu_read_lock){....}-{1:2}, at: __atomic_notifier_call_chain+0x0/0x118 [ 165.236288] stack backtrace: [ 165.239174] CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 5.8.0-rc3-00003-g0e9088558027-dirty #11 [ 165.248220] Hardware name: Freescale i.MX6 SoloLite (Device Tree) [ 165.254330] [<c0112110>] (unwind_backtrace) from [<c010bfa0>] (show_stack+0x10/0x14) [ 165.262084] [<c010bfa0>] (show_stack) from [<c058093c>] (dump_stack+0xe8/0x120) [ 165.269407] [<c058093c>] (dump_stack) from [<c01835a4>] (__lock_acquire+0x81c/0x2ca0) [ 165.277246] [<c01835a4>] (__lock_acquire) from [<c0186344>] (lock_acquire+0xe4/0x490) [ 165.285090] [<c0186344>] (lock_acquire) from [<c0c98638>] (__mutex_lock+0x74/0x954) [ 165.292756] [<c0c98638>] (__mutex_lock) from [<c0c98f34>] (mutex_lock_nested+0x1c/0x24) [ 165.300769] [<c0c98f34>] (mutex_lock_nested) from [<c07593ec>] (regmap_update_bits_base+0x30/0x70) [ 165.309741] [<c07593ec>] (regmap_update_bits_base) from [<c076b838>] (rn5t618_trigger_poweroff_sequence+0x34/0x64) [ 165.320097] [<c076b838>] (rn5t618_trigger_poweroff_sequence) from [<c076b874>] (rn5t618_restart+0xc/0x2c) [ 165.329669] [<c076b874>] (rn5t618_restart) from [<c01514f8>] (notifier_call_chain+0x48/0x80) [ 165.338113] [<c01514f8>] (notifier_call_chain) from [<c01516a8>] (__atomic_notifier_call_chain+0x70/0x118) [ 165.347770] [<c01516a8>] (__atomic_notifier_call_chain) from [<c0151768>] (atomic_notifier_call_chain+0x18/0x20) [ 165.357949] [<c0151768>] (atomic_notifier_call_chain) from [<c010a828>] (machine_restart+0x68/0x80) [ 165.367001] [<c010a828>] (machine_restart) from [<c0153224>] (__do_sys_reboot+0x11c/0x204) [ 165.375272] [<c0153224>] (__do_sys_reboot) from [<c0100080>] (ret_fast_syscall+0x0/0x28) [ 165.383364] Exception stack(0xd80a5fa8 to 0xd80a5ff0) [ 165.388420] 5fa0: 00406948 00000000 fee1dead 28121969 01234567 73299b00 [ 165.396602] 5fc0: 00406948 00000000 00000000 00000058 be91abc8 00000000 be91ab60 004056f8 [ 165.404781] 5fe0: 00000058 be91aabc b6ed4d45 b6e56746 Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-03-27mfd: rn5t618: Cleanup i2c_device_idAndreas Kemnade
That list was just empty, so it can be removed if .probe_new instead of .probe is used Suggested-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-03-27mfd: rn5t618: Add more subdevicesAndreas Kemnade
Since the RC5T619 has a RTC, use a separate subdevice list for that. The ADC should be the same as in the RN5T618, according to drivers in the wild, but since it is not tested, the ADC is only added for the RC5T619. Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-03-27mfd: rn5t618: Add RTC related registersAndreas Kemnade
Defines for some RTC related registers were missing, also they were not included in the volatile register list Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-03-27mfd: rn5t618: Add IRQ supportAndreas Kemnade
This adds support for IRQ handling in the RC5T619 which is required for properly implementing subdevices like RTC. For now only definitions for the variant RC5T619 are included. Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2020-01-24mfd: rn5t618: Mark ADC control register volatileAndreas Kemnade
There is a bit which gets cleared after conversion. Fixes: 9bb9e29c78f8 ("mfd: Add Ricoh RN5T618 PMIC core driver") Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2019-06-05treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 446Thomas Gleixner
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 30 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190531190115.962665879@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-07-06mfd: rn5t618: Unregister restart handler on removeStefan Agner
Remove the restart handler registered in probe on device remove. Fixes: a370f60a58ec ("mfd: rn5t618: Register restart handler") Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-11-29mfd: rn5t618: Add Ricoh RC5T619 PMIC supportPierre-Hugues Husson
The Ricoh RN5T567 is from the same family as the Ricoh RN5T618 is, the differences are: + DCDC4/DCDC5 + LDO7-10 + Slightly different output voltage/currents + 32kHz Output + RTC + USB Charger detection Signed-off-by: Pierre-Hugues Husson <phh@phh.me> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-06-29mfd: rn5t618: Register restart handlerStefan Agner
Use the PMIC's repower capability for reboots. Register a restart handler and use a slightly elevated priority of 192 since the PMIC has suprior reset capability (causing a system wide reset). Signed-off-by: Stefan Agner <stefan@agner.ch> Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-06-29mfd: rn5t618: Register power off callback optionallyStefan Agner
Only register power off if the PMIC is defined as system power controller (see Documentation/devicetree/bindings/power/ power-controller.txt). Signed-off-by: Stefan Agner <stefan@agner.ch> Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-06-29mfd: rn5t618: Add Ricoh RN5T567 PMIC supportStefan Agner
The Ricoh RN5T567 is from the same family as the Ricoh RN5T618 is, the differences are: + DCDC4 + Slightly different output voltage/currents + 32kHz Output - ADC/Charger capabilities Signed-off-by: Stefan Agner <stefan@agner.ch> Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-04-19mfd: rn5t618: Use devm_mfd_add_devices() for mfd_device registrationLaxman Dewangan
Use devm_mfd_add_devices() for MFD devices registration and remove the call of mfd_remove_devices() from .remove callback to remove MFD child-devices. This is done by managed device framework. CC: Beniamino Galvani <b.galvani@gmail.com> Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-09-26mfd: Add Ricoh RN5T618 PMIC core driverBeniamino Galvani
Ricoh RN5T618 is a power management IC which integrates 3 step-down DCDC converters, 7 low-dropout regulators, a Li-ion battery charger, fuel gauge, ADC, GPIOs and a watchdog timer. This commit adds a MFD core driver to support the I2C communication with the device. Signed-off-by: Beniamino Galvani <b.galvani@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
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