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path: root/drivers/mfd/exynos-lpass.c
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2019-06-05treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 390Thomas Gleixner1-4/+1
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 and only version 2 as published by the free software foundation extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 1 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Armijn Hemel <armijn@tjaldur.nl> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190531081037.927746163@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-03mfd: exynos-lpass: Enable UART module supportBeomho Seo1-1/+3
This patch enables proper interrupts routing between UART module in Exynos Audio SubSystem and the rest of the SoC. This routing is completely transparent for UART device and CPU/GIC. UART driver requests interrupts from the respective controller and enables/masks/handles it by itself via standard methods. There are boards (for example TM2), which use UART module in Exynos Audio SubStem for communication with BlueTooth chip. Signed-off-by: Beomho Seo <beomho.seo@samsung.com> [mszyprow: rephrased commit message, added UART reset] Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-07-06mfd: exynos: Use devm_of_platform_populate()Benjamin Gaignard1-1/+1
Use devm_of_platform_populate() to be sure that of_platform_depopulate is called when removing the driver. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27mfd: exynos-lpass: Add runtime PM supportMarek Szyprowski1-2/+11
Convert exisitng lpass-suspend/resume callbacks into runtime PM callbacks. This way Exynos LPASS driver will be ready for use with power domains enabled. LPASS will be runtime resumed/suspended as a result of its child devices runtime PM transitions. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27mfd: exynos-lpass: Add missing remove() functionMarek Szyprowski1-0/+11
Disable device on driver remove and release allocated regmap. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27mfd: exynos-lpass: Add support for clocksMarek Szyprowski1-0/+10
Exynos LPASS requires some clocks to be enabled to make any access to its registers. This patch adds code for handling such clocks. For current set of registers it is enough to keep sfr0_ctrl clock enabled. Till now it worked only because those clocks were enabled by bootloader and driver probe() happened before they were disabled by clock core because of lack of users. Handling those clocks is also needed to make it possible to enable support for audio power domain. This patch requires adding sfr0_ctrl clock to device tree. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Acked-by: Rob Herring <robh@kernel.org> Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-04-27mfd: exynos-lpass: Remove pad retention controlMarek Szyprowski1-16/+0
Pad retention should be controlled from pin control driver, so remove it from Exynos LPASS driver. After this change, no more access to PMU regmap is needed, so remove also the code for handling PMU regmap. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Acked-by: Rob Herring <robh@kernel.org> Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-03-23mfd: exynos-lpass: Use common soc/exynos-regs-pmu.h headerKrzysztof Kozlowski1-2/+2
The MFD-specific header will go away because it duplicates defines from exynos-regs-pmu.h. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-10-04mfd: exynos-lpass: Mark PM functions as __maybe_unusedArnd Bergmann1-4/+2
The newly added exynos lpass driver produces a build warning when CONFIG_PM is disabled since the only callers of exynos_lpass_disable are under an #ifdef: drivers/mfd/exynos-lpass.c:93:13: error: 'exynos_lpass_disable' defined but not used [-Werror=unused-function] static void exynos_lpass_disable(struct exynos_lpass *lpass) This removes the #ifdef and replaces it with __maybe_unused annotations so the compiler can leave out the unused code silently with less room for mistakes. Fixes: 36c26760bba8 ("mfd: Add Samsung Exynos Low Power Audio Subsystem driver") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2016-10-04mfd: Add Samsung Exynos Low Power Audio Subsystem driverSylwester Nawrocki1-0/+187
This patch adds common driver for the Top block of the Samsung Exynos SoC Low Power Audio Subsystem. This is a minimal driver which prepares resources for IP blocks like I2S, audio DMA and UART and exposes a regmap for the Top block registers. Also system power ops are added to ensure the Audio Subsystem is operational after system suspend/resume cycle. Signed-off-by: Inha Song <ideal.song@samsung.com> Signed-off-by: Beomho Seo <beomho.seo@samsung.com> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Tested-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>