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Vincent Whitchurch 8aeb6173e8 regulator: pwm: Fix machine constraints application 
[ Upstream commit 59ae97a7a9 ]

If the zero duty cycle doesn't correspond to any voltage in the voltage
table, the PWM regulator returns an -EINVAL from get_voltage_sel() which
results in the core erroring out with a "failed to get the current
voltage" and ending up not applying the machine constraints.

Instead, return -ENOTRECOVERABLE which makes the core set the voltage
since it's at an unknown value.

For example, with this device tree:

	fooregulator {
		compatible = "pwm-regulator";
		pwms = <&foopwm 0 100000>;
		regulator-min-microvolt = <2250000>;
		regulator-max-microvolt = <2250000>;
		regulator-name = "fooregulator";
		regulator-always-on;
		regulator-boot-on;
		voltage-table = <2250000 30>;
	};

Before this patch:

  fooregulator: failed to get the current voltage(-22)

After this patch:

  fooregulator: Setting 2250000-2250000uV
  fooregulator: 2250 mV

Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Link: https://lore.kernel.org/r/20200902130952.24880-1-vincent.whitchurch@axis.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-09-23 12:40:35 +02:00
arch ARM: dts: vfxxx: Add syscon compatible with OCOTP 2020-09-17 13:47:55 +02:00
block block: Set same_page to false in __bio_try_merge_page if ret is false 2020-09-17 13:47:44 +02:00
certs PKCS#7: Refactor verify_pkcs7_signature() 2019-08-05 18:40:18 -04:00
crypto crypto: af_alg - Work around empty control messages without MSG_MORE 2020-09-03 11:27:05 +02:00
Documentation affs: fix basic permission bits to actually work 2020-09-09 19:12:34 +02:00
drivers regulator: pwm: Fix machine constraints application 2020-09-23 12:40:35 +02:00
fs NFSv4.1 handle ERR_DELAY error reclaiming locking state on delegation recall 2020-09-23 12:40:34 +02:00
include irqchip/eznps: Fix build error for !ARC700 builds 2020-09-17 13:47:47 +02:00
init x86: Fix early boot crash on gcc-10, third try 2020-05-20 08:20:34 +02:00
ipc ipc/util.c: sysvipc_find_ipc() incorrectly updates position index 2020-05-20 08:20:16 +02:00
kernel gcov: add support for GCC 10.1 2020-09-17 13:47:56 +02:00
lib kobject: Restore old behaviour of kobject_del(NULL) 2020-09-17 13:47:52 +02:00
LICENSES LICENSES: Rename other to deprecated 2019-05-03 06:34:32 -06:00
mm mm/khugepaged.c: fix khugepaged's request size in collapse_file 2020-09-09 19:12:37 +02:00
net net: handle the return value of pskb_carve_frag_list() correctly 2020-09-23 12:40:34 +02:00
samples bpf: Fix fds_example SIGSEGV error 2020-08-19 08:16:03 +02:00
scripts checkpatch: fix the usage of capture group ( ... ) 2020-09-09 19:12:37 +02:00
security Smack: prevent underflow in smk_set_cipso() 2020-08-19 08:16:16 +02:00
sound ALSA: hda: fix a runtime pm issue in SOF when integrated GPU is disabled 2020-09-17 13:47:49 +02:00
tools selftests/timers: Turn off timeout setting 2020-09-17 13:47:41 +02:00
usr initramfs: restore default compression behavior 2020-04-08 09:08:38 +02:00
virt KVM: fix memory leak in kvm_io_bus_unregister_dev() 2020-09-17 13:47:54 +02:00
.clang-format clang-format: Update with the latest for_each macro list 2019-08-31 10:00:51 +02:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes
.gitignore Modules updates for v5.4 2019-09-22 10:34:46 -07:00
.mailmap ARM: SoC fixes 2019-11-10 13:41:59 -08:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer 2019-10-10 08:12:51 -07:00
Kbuild kbuild: do not descend to ./Kbuild when cleaning 2019-08-21 21:03:58 +09:00
Kconfig docs: kbuild: convert docs to ReST and rename to *.rst 2019-06-14 14:21:21 -06:00
MAINTAINERS Documentation/llvm: add documentation on building w/ Clang/LLVM 2020-08-26 10:40:46 +02:00
Makefile Linux 5.4.66 2020-09-17 13:47:56 +02:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.