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* reset_source: introduce reset_source_to_stringAhmad Fatoum2020-02-191-2/+7
| | | | | | | | | | | | | | We have a few places where driver code prints reset_source_name() to console after setting the reset source. This working is probe order dependent, because reset_source_name() prints the highest priority reset_source so far, which doesn't necessarily have to be the one that was just computed. Implement reset_source_to_string, so drivers can be migrated to use it. Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* include: add SPDX GPL-2.0-or-later license tags where applicableRoland Hieber2020-02-171-5/+1
| | | | | | Signed-off-by: Roland Hieber <rohieb@rohieb.name> Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* reset_source: add stub for reset_source_set_deviceLucas Stach2019-12-021-0/+5
| | | | | | | Fixes: a0748840c104 (reset_source: implement helper to set a device as reset source) Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* oftree: expose reset_source device in device treeUwe Kleine-König2019-09-091-0/+5
| | | | | Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* reset_source: implement helper to set a device as reset sourceUwe Kleine-König2019-08-281-0/+2
| | | | | | | This allows to remove some boilerplate from drivers. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* reset_source: drop reset_source_set_instance()Uwe Kleine-König2019-08-281-4/+10
| | | | | | | | | | | | The semantic of reset_source_set_instance() required a separate call to reset_source_set() (or reset_source_set_priority()) and checked right usage only using the type. Make the set of functions a bit easier to use by dropping reset_source_set_instance() and instead introduce a function that can set all relevant parameters (source, priority and instance) in one go. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* reset_source: fix ordering of exported functionsUwe Kleine-König2019-08-281-14/+19
| | | | | | | | Declare and implement getters first, then setters. This syncs the order of functions in reset_source.c and reset_source.h. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* reset_source: use instance = -1 as defaultUwe Kleine-König2019-08-281-1/+1
| | | | | | | | | | | As with platform device id (does someone still remember?) 0 might be a valid id. So use -1 for "unknown" or "doesn't apply" instead of 0. Also don't pass the instance to the device tree if negative. (This ends up as 0xffffffff otherwise.) Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* reset_source: add new Brownout reset (BOR) sourceAhmad Fatoum2019-06-131-0/+1
| | | | | | | | | The STM32MP1 can report brown out as reason for a reset, which doesn't fit into existing reasons. Thus add a new one to the enumeration. Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* common: reset_source: Introduce reset_source_name()Andrey Smirnov2018-05-081-0/+6
| | | | | | | | Introduce reset_source_name() to get string representation of current reset source. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* common: reset_source: Add the notion of "reset source instance"Andrey Smirnov2018-04-261-0/+11
| | | | | | | | | In order to accomodate SoCs that come with multiple watchdogs (or any other reset sources of the same kind) add a notion of "reset source instance", similar to what we already have for bootsource API. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* reset-source: add stub for of_get_reset_source_priorityLucas Stach2015-09-041-2/+6
| | | | | | | Allow drivers to build even if reset source support isn't built in. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* reset-source: Allow different prioritiesSascha Hauer2015-08-281-2/+12
| | | | | | | | | | | | | | Different devices may report the reset source with different levels of certainty. For example a SoC may see a power-on reset, but this may only be because an external PMIC has power cycled the SoC. This means the PMIC knows the real reason better and thus the reset reason from the PMIC should be preferred. This patch introduces priorities for the reset_source to handle the above scenario. Also add a of_get_reset_source_priority() function to retrieve the desired priority from the device tree. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* reset_source: Add external resetWadim Egorov2015-03-021-0/+1
| | | | | | | Some SoCs have special device pins for external reset signals. Signed-off-by: Wadim Egorov <w.egorov@phytec.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* reset_source: add thermal resetLucas Stach2014-11-041-0/+1
| | | | | | | | Some SoCs are able to detect if they got reset in response to an overtemperature event. Signed-off-by: Lucas Stach <dev@lynxeye.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* reset_source: add reset_source_getSascha Hauer2014-01-291-0/+6
| | | | | | To get reset_source from C code, not only from shell. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* reset_source: rename set_reset_source to reset_source_setSascha Hauer2014-01-291-2/+2
| | | | | | | To get all reset source related functions into the same function namespace. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* reset_source: provide static inline function if disabledSascha Hauer2012-10-081-0/+6
| | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* Enable a way to provide the reason for "being here"Juergen Beisert2012-07-181-0/+27
Many architectures support a way to detect why the bootloader is running. This patch adds a global variable to be able to use the cause in some kind of shell code to do special things on demand. For example to do an emergency boot, when the last boot fails and the watchdog reactivate the hanging system. Signed-off-by: Juergen Beisert <jbe@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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