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Message-ID: <202601010305.tpY47HE4-lkp@intel.com>
Date: Thu, 1 Jan 2026 03:18:51 +0800
From: kernel test robot <lkp@...el.com>
To: Josua Mayer <josua@...id-run.com>, Ulf Hansson <ulf.hansson@...aro.org>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Magnus Damm <magnus.damm@...il.com>,
Wolfram Sang <wsa-dev@...g-engineering.com>,
Marc Kleine-Budde <mkl@...gutronix.de>,
Vincent Mailhol <mailhol@...nel.org>, Vinod Koul <vkoul@...nel.org>,
Kishon Vijay Abraham I <kishon@...nel.org>,
Peter Rosin <peda@...ntia.se>, Aaro Koskinen <aaro.koskinen@....fi>,
Andreas Kemnade <andreas@...nade.info>,
Kevin Hilman <khilman@...libre.com>,
Roger Quadros <rogerq@...nel.org>, Tony Lindgren <tony@...mide.com>,
Vignesh R <vigneshr@...com>,
Janusz Krzysztofik <jmkrzyszt@...il.com>,
Andi Shyti <andi.shyti@...nel.org>,
Neil Armstrong <neil.armstrong@...aro.org>
Cc: oe-kbuild-all@...ts.linux.dev,
Mikhail Anikin <mikhail.anikin@...id-run.com>,
Yazan Shhady <yazan.shhady@...id-run.com>,
Jon Nettleton <jon@...id-run.com>, linux-mmc@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-renesas-soc@...r.kernel.org, linux-can@...r.kernel.org,
linux-phy@...ts.infradead.org
Subject: Re: [PATCH v4 2/7] mux: Add helper functions for getting optional
and selected mux-state
Hi Josua,
kernel test robot noticed the following build errors:
[auto build test ERROR on 8f0b4cce4481fb22653697cced8d0d04027cb1e8]
url: https://github.com/intel-lab-lkp/linux/commits/Josua-Mayer/phy-can-transceiver-rename-temporary-helper-function-to-avoid-conflict/20251229-223153
base: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
patch link: https://lore.kernel.org/r/20251229-rz-sdio-mux-v4-2-a023e55758fe%40solid-run.com
patch subject: [PATCH v4 2/7] mux: Add helper functions for getting optional and selected mux-state
config: parisc-randconfig-002-20260101 (https://download.01.org/0day-ci/archive/20260101/202601010305.tpY47HE4-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260101/202601010305.tpY47HE4-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601010305.tpY47HE4-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h: In function 'mux_control_put':
>> include/linux/mux/consumer.h:138:9: warning: 'return' with a value, in function returning void [-Wreturn-type]
138 | return -EOPNOTSUPP;
| ^
include/linux/mux/consumer.h:136:20: note: declared here
136 | static inline void mux_control_put(struct mux_control *mux)
| ^~~~~~~~~~~~~~~
drivers/mux/core.c: At top level:
>> drivers/mux/core.c:302:14: error: redefinition of 'mux_control_states'
302 | unsigned int mux_control_states(struct mux_control *mux)
| ^~~~~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:70:28: note: previous definition of 'mux_control_states' was here
70 | static inline unsigned int mux_control_states(struct mux_control *mux)
| ^~~~~~~~~~~~~~~~~~
>> drivers/mux/core.c:365:5: error: redefinition of 'mux_control_select_delay'
365 | int mux_control_select_delay(struct mux_control *mux, unsigned int state,
| ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:74:32: note: previous definition of 'mux_control_select_delay' was here
74 | static inline int __must_check mux_control_select_delay(struct mux_control *mux,
| ^~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/mux/core.c:403:5: error: redefinition of 'mux_state_select_delay'
403 | int mux_state_select_delay(struct mux_state *mstate, unsigned int delay_us)
| ^~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:79:32: note: previous definition of 'mux_state_select_delay' was here
79 | static inline int __must_check mux_state_select_delay(struct mux_state *mstate,
| ^~~~~~~~~~~~~~~~~~~~~~
>> drivers/mux/core.c:425:5: error: redefinition of 'mux_control_try_select_delay'
425 | int mux_control_try_select_delay(struct mux_control *mux, unsigned int state,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:84:32: note: previous definition of 'mux_control_try_select_delay' was here
84 | static inline int __must_check mux_control_try_select_delay(struct mux_control *mux,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/mux/core.c:459:5: error: redefinition of 'mux_state_try_select_delay'
459 | int mux_state_try_select_delay(struct mux_state *mstate, unsigned int delay_us)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:90:32: note: previous definition of 'mux_state_try_select_delay' was here
90 | static inline int __must_check mux_state_try_select_delay(struct mux_state *mstate,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/mux/core.c:477:5: error: redefinition of 'mux_control_deselect'
477 | int mux_control_deselect(struct mux_control *mux)
| ^~~~~~~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:118:19: note: previous definition of 'mux_control_deselect' was here
118 | static inline int mux_control_deselect(struct mux_control *mux)
| ^~~~~~~~~~~~~~~~~~~~
>> drivers/mux/core.c:503:5: error: redefinition of 'mux_state_deselect'
503 | int mux_state_deselect(struct mux_state *mstate)
| ^~~~~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:122:19: note: previous definition of 'mux_state_deselect' was here
122 | static inline int mux_state_deselect(struct mux_state *mstate)
| ^~~~~~~~~~~~~~~~~~
>> drivers/mux/core.c:625:21: error: redefinition of 'mux_control_get'
625 | struct mux_control *mux_control_get(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:127:35: note: previous definition of 'mux_control_get' was here
127 | static inline struct mux_control *mux_control_get(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~
>> drivers/mux/core.c:638:21: error: redefinition of 'mux_control_get_optional'
638 | struct mux_control *mux_control_get_optional(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:131:35: note: previous definition of 'mux_control_get_optional' was here
131 | static inline struct mux_control *mux_control_get_optional(struct device *dev,
| ^~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/mux/core.c:650:6: error: redefinition of 'mux_control_put'
650 | void mux_control_put(struct mux_control *mux)
| ^~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:136:20: note: previous definition of 'mux_control_put' was here
136 | static inline void mux_control_put(struct mux_control *mux)
| ^~~~~~~~~~~~~~~
>> drivers/mux/core.c:671:21: error: redefinition of 'devm_mux_control_get'
671 | struct mux_control *devm_mux_control_get(struct device *dev,
| ^~~~~~~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:141:35: note: previous definition of 'devm_mux_control_get' was here
141 | static inline struct mux_control *devm_mux_control_get(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~~~~~~
>> drivers/mux/core.c:774:19: error: redefinition of 'devm_mux_state_get'
774 | struct mux_state *devm_mux_state_get(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:145:33: note: previous definition of 'devm_mux_state_get' was here
145 | static inline struct mux_state *devm_mux_state_get(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~~~~
>> drivers/mux/core.c:788:19: error: redefinition of 'devm_mux_state_get_optional'
788 | struct mux_state *devm_mux_state_get_optional(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:149:33: note: previous definition of 'devm_mux_state_get_optional' was here
149 | static inline struct mux_state *devm_mux_state_get_optional(struct device *dev,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/mux/core.c:838:19: error: redefinition of 'devm_mux_state_get_selected'
838 | struct mux_state *devm_mux_state_get_selected(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:154:33: note: previous definition of 'devm_mux_state_get_selected' was here
154 | static inline struct mux_state *devm_mux_state_get_selected(struct device *dev,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/mux/core.c:854:19: error: redefinition of 'devm_mux_state_get_optional_selected'
854 | struct mux_state *devm_mux_state_get_optional_selected(struct device *dev,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/mux/core.c:19:
include/linux/mux/consumer.h:159:33: note: previous definition of 'devm_mux_state_get_optional_selected' was here
159 | static inline struct mux_state *devm_mux_state_get_optional_selected(struct device *dev,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
In file included from core.c:19:
include/linux/mux/consumer.h: In function 'mux_control_put':
>> include/linux/mux/consumer.h:138:9: warning: 'return' with a value, in function returning void [-Wreturn-type]
138 | return -EOPNOTSUPP;
| ^
include/linux/mux/consumer.h:136:20: note: declared here
136 | static inline void mux_control_put(struct mux_control *mux)
| ^~~~~~~~~~~~~~~
core.c: At top level:
core.c:302:14: error: redefinition of 'mux_control_states'
302 | unsigned int mux_control_states(struct mux_control *mux)
| ^~~~~~~~~~~~~~~~~~
In file included from core.c:19:
include/linux/mux/consumer.h:70:28: note: previous definition of 'mux_control_states' was here
70 | static inline unsigned int mux_control_states(struct mux_control *mux)
| ^~~~~~~~~~~~~~~~~~
core.c:365:5: error: redefinition of 'mux_control_select_delay'
365 | int mux_control_select_delay(struct mux_control *mux, unsigned int state,
| ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from core.c:19:
include/linux/mux/consumer.h:74:32: note: previous definition of 'mux_control_select_delay' was here
74 | static inline int __must_check mux_control_select_delay(struct mux_control *mux,
| ^~~~~~~~~~~~~~~~~~~~~~~~
core.c:403:5: error: redefinition of 'mux_state_select_delay'
403 | int mux_state_select_delay(struct mux_state *mstate, unsigned int delay_us)
| ^~~~~~~~~~~~~~~~~~~~~~
In file included from core.c:19:
include/linux/mux/consumer.h:79:32: note: previous definition of 'mux_state_select_delay' was here
79 | static inline int __must_check mux_state_select_delay(struct mux_state *mstate,
| ^~~~~~~~~~~~~~~~~~~~~~
core.c:425:5: error: redefinition of 'mux_control_try_select_delay'
425 | int mux_control_try_select_delay(struct mux_control *mux, unsigned int state,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from core.c:19:
include/linux/mux/consumer.h:84:32: note: previous definition of 'mux_control_try_select_delay' was here
84 | static inline int __must_check mux_control_try_select_delay(struct mux_control *mux,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
core.c:459:5: error: redefinition of 'mux_state_try_select_delay'
459 | int mux_state_try_select_delay(struct mux_state *mstate, unsigned int delay_us)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from core.c:19:
include/linux/mux/consumer.h:90:32: note: previous definition of 'mux_state_try_select_delay' was here
90 | static inline int __must_check mux_state_try_select_delay(struct mux_state *mstate,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
core.c:477:5: error: redefinition of 'mux_control_deselect'
477 | int mux_control_deselect(struct mux_control *mux)
| ^~~~~~~~~~~~~~~~~~~~
In file included from core.c:19:
include/linux/mux/consumer.h:118:19: note: previous definition of 'mux_control_deselect' was here
118 | static inline int mux_control_deselect(struct mux_control *mux)
| ^~~~~~~~~~~~~~~~~~~~
core.c:503:5: error: redefinition of 'mux_state_deselect'
503 | int mux_state_deselect(struct mux_state *mstate)
| ^~~~~~~~~~~~~~~~~~
In file included from core.c:19:
include/linux/mux/consumer.h:122:19: note: previous definition of 'mux_state_deselect' was here
122 | static inline int mux_state_deselect(struct mux_state *mstate)
| ^~~~~~~~~~~~~~~~~~
core.c:625:21: error: redefinition of 'mux_control_get'
625 | struct mux_control *mux_control_get(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~
In file included from core.c:19:
include/linux/mux/consumer.h:127:35: note: previous definition of 'mux_control_get' was here
127 | static inline struct mux_control *mux_control_get(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~
core.c:638:21: error: redefinition of 'mux_control_get_optional'
638 | struct mux_control *mux_control_get_optional(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from core.c:19:
include/linux/mux/consumer.h:131:35: note: previous definition of 'mux_control_get_optional' was here
131 | static inline struct mux_control *mux_control_get_optional(struct device *dev,
| ^~~~~~~~~~~~~~~~~~~~~~~~
core.c:650:6: error: redefinition of 'mux_control_put'
650 | void mux_control_put(struct mux_control *mux)
| ^~~~~~~~~~~~~~~
In file included from core.c:19:
include/linux/mux/consumer.h:136:20: note: previous definition of 'mux_control_put' was here
136 | static inline void mux_control_put(struct mux_control *mux)
| ^~~~~~~~~~~~~~~
core.c:671:21: error: redefinition of 'devm_mux_control_get'
671 | struct mux_control *devm_mux_control_get(struct device *dev,
| ^~~~~~~~~~~~~~~~~~~~
In file included from core.c:19:
include/linux/mux/consumer.h:141:35: note: previous definition of 'devm_mux_control_get' was here
141 | static inline struct mux_control *devm_mux_control_get(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~~~~~~
core.c:774:19: error: redefinition of 'devm_mux_state_get'
774 | struct mux_state *devm_mux_state_get(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~~~~
In file included from core.c:19:
include/linux/mux/consumer.h:145:33: note: previous definition of 'devm_mux_state_get' was here
145 | static inline struct mux_state *devm_mux_state_get(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~~~~
core.c:788:19: error: redefinition of 'devm_mux_state_get_optional'
788 | struct mux_state *devm_mux_state_get_optional(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from core.c:19:
include/linux/mux/consumer.h:149:33: note: previous definition of 'devm_mux_state_get_optional' was here
149 | static inline struct mux_state *devm_mux_state_get_optional(struct device *dev,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
core.c:838:19: error: redefinition of 'devm_mux_state_get_selected'
838 | struct mux_state *devm_mux_state_get_selected(struct device *dev, const char *mux_name)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
vim +/mux_control_states +302 drivers/mux/core.c
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 295
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 296 /**
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 297 * mux_control_states() - Query the number of multiplexer states.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 298 * @mux: The mux-control to query.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 299 *
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 300 * Return: The number of multiplexer states.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 301 */
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 @302 unsigned int mux_control_states(struct mux_control *mux)
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 303 {
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 304 return mux->states;
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 305 }
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 306 EXPORT_SYMBOL_GPL(mux_control_states);
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 307
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 308 /*
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 309 * The mux->lock must be down when calling this function.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 310 */
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 311 static int __mux_control_select(struct mux_control *mux, int state)
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 312 {
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 313 int ret;
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 314
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 315 if (WARN_ON(state < 0 || state >= mux->states))
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 316 return -EINVAL;
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 317
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 318 if (mux->cached_state == state)
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 319 return 0;
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 320
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 321 ret = mux_control_set(mux, state);
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 322 if (ret >= 0)
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 323 return 0;
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 324
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 325 /* The mux update failed, try to revert if appropriate... */
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 326 if (mux->idle_state != MUX_IDLE_AS_IS)
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 327 mux_control_set(mux, mux->idle_state);
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 328
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 329 return ret;
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 330 }
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 331
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 332 static void mux_control_delay(struct mux_control *mux, unsigned int delay_us)
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 333 {
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 334 ktime_t delayend;
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 335 s64 remaining;
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 336
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 337 if (!delay_us)
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 338 return;
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 339
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 340 delayend = ktime_add_us(mux->last_change, delay_us);
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 341 remaining = ktime_us_delta(delayend, ktime_get());
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 342 if (remaining > 0)
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 343 fsleep(remaining);
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 344 }
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 345
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 346 /**
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 347 * mux_control_select_delay() - Select the given multiplexer state.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 348 * @mux: The mux-control to request a change of state from.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 349 * @state: The new requested state.
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 350 * @delay_us: The time to delay (in microseconds) if the mux state is changed.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 351 *
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 352 * On successfully selecting the mux-control state, it will be locked until
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 353 * there is a call to mux_control_deselect(). If the mux-control is already
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 354 * selected when mux_control_select() is called, the caller will be blocked
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 355 * until mux_control_deselect() or mux_state_deselect() is called (by someone
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 356 * else).
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 357 *
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 358 * Therefore, make sure to call mux_control_deselect() when the operation is
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 359 * complete and the mux-control is free for others to use, but do not call
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 360 * mux_control_deselect() if mux_control_select() fails.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 361 *
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 362 * Return: 0 when the mux-control state has the requested state or a negative
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 363 * errno on error.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 364 */
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 @365 int mux_control_select_delay(struct mux_control *mux, unsigned int state,
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 366 unsigned int delay_us)
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 367 {
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 368 int ret;
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 369
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 370 ret = down_killable(&mux->lock);
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 371 if (ret < 0)
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 372 return ret;
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 373
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 374 ret = __mux_control_select(mux, state);
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 375 if (ret >= 0)
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 376 mux_control_delay(mux, delay_us);
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 377
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 378 if (ret < 0)
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 379 up(&mux->lock);
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 380
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 381 return ret;
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 382 }
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 383 EXPORT_SYMBOL_GPL(mux_control_select_delay);
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 384
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 385 /**
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 386 * mux_state_select_delay() - Select the given multiplexer state.
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 387 * @mstate: The mux-state to select.
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 388 * @delay_us: The time to delay (in microseconds) if the mux state is changed.
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 389 *
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 390 * On successfully selecting the mux-state, its mux-control will be locked
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 391 * until there is a call to mux_state_deselect(). If the mux-control is already
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 392 * selected when mux_state_select() is called, the caller will be blocked
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 393 * until mux_state_deselect() or mux_control_deselect() is called (by someone
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 394 * else).
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 395 *
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 396 * Therefore, make sure to call mux_state_deselect() when the operation is
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 397 * complete and the mux-control is free for others to use, but do not call
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 398 * mux_state_deselect() if mux_state_select() fails.
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 399 *
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 400 * Return: 0 when the mux-state has been selected or a negative
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 401 * errno on error.
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 402 */
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 @403 int mux_state_select_delay(struct mux_state *mstate, unsigned int delay_us)
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 404 {
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 405 return mux_control_select_delay(mstate->mux, mstate->state, delay_us);
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 406 }
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 407 EXPORT_SYMBOL_GPL(mux_state_select_delay);
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 408
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 409 /**
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 410 * mux_control_try_select_delay() - Try to select the given multiplexer state.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 411 * @mux: The mux-control to request a change of state from.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 412 * @state: The new requested state.
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 413 * @delay_us: The time to delay (in microseconds) if the mux state is changed.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 414 *
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 415 * On successfully selecting the mux-control state, it will be locked until
f22d1117b9c3e2 drivers/mux/core.c Peter Rosin 2022-01-07 416 * mux_control_deselect() is called.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 417 *
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 418 * Therefore, make sure to call mux_control_deselect() when the operation is
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 419 * complete and the mux-control is free for others to use, but do not call
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 420 * mux_control_deselect() if mux_control_try_select() fails.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 421 *
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 422 * Return: 0 when the mux-control state has the requested state or a negative
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 423 * errno on error. Specifically -EBUSY if the mux-control is contended.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 424 */
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 @425 int mux_control_try_select_delay(struct mux_control *mux, unsigned int state,
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 426 unsigned int delay_us)
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 427 {
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 428 int ret;
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 429
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 430 if (down_trylock(&mux->lock))
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 431 return -EBUSY;
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 432
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 433 ret = __mux_control_select(mux, state);
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 434 if (ret >= 0)
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 435 mux_control_delay(mux, delay_us);
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 436
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 437 if (ret < 0)
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 438 up(&mux->lock);
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 439
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 440 return ret;
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 441 }
17b5b576ff5faf drivers/mux/core.c Vincent Whitchurch 2021-10-07 442 EXPORT_SYMBOL_GPL(mux_control_try_select_delay);
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 443
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 444 /**
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 445 * mux_state_try_select_delay() - Try to select the given multiplexer state.
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 446 * @mstate: The mux-state to select.
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 447 * @delay_us: The time to delay (in microseconds) if the mux state is changed.
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 448 *
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 449 * On successfully selecting the mux-state, its mux-control will be locked
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 450 * until mux_state_deselect() is called.
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 451 *
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 452 * Therefore, make sure to call mux_state_deselect() when the operation is
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 453 * complete and the mux-control is free for others to use, but do not call
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 454 * mux_state_deselect() if mux_state_try_select() fails.
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 455 *
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 456 * Return: 0 when the mux-state has been selected or a negative errno on
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 457 * error. Specifically -EBUSY if the mux-control is contended.
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 458 */
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 @459 int mux_state_try_select_delay(struct mux_state *mstate, unsigned int delay_us)
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 460 {
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 461 return mux_control_try_select_delay(mstate->mux, mstate->state, delay_us);
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 462 }
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 463 EXPORT_SYMBOL_GPL(mux_state_try_select_delay);
84564481bc4520 drivers/mux/core.c Aswath Govindraju 2022-01-07 464
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 465 /**
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 466 * mux_control_deselect() - Deselect the previously selected multiplexer state.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 467 * @mux: The mux-control to deselect.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 468 *
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 469 * It is required that a single call is made to mux_control_deselect() for
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 470 * each and every successful call made to either of mux_control_select() or
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 471 * mux_control_try_select().
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 472 *
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 473 * Return: 0 on success and a negative errno on error. An error can only
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 474 * occur if the mux has an idle state. Note that even if an error occurs, the
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 475 * mux-control is unlocked and is thus free for the next access.
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 476 */
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 @477 int mux_control_deselect(struct mux_control *mux)
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 478 {
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 479 int ret = 0;
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 480
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 481 if (mux->idle_state != MUX_IDLE_AS_IS &&
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 482 mux->idle_state != mux->cached_state)
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 483 ret = mux_control_set(mux, mux->idle_state);
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 484
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 485 up(&mux->lock);
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 486
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 487 return ret;
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 488 }
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 489 EXPORT_SYMBOL_GPL(mux_control_deselect);
a3b02a9c6591ce drivers/mux/mux-core.c Peter Rosin 2017-05-14 490
--
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