lwn.git/arch/arm/mach-s3c64xx/mach-smartq.c, branch master

ARM: s3c: move into a common directory

2020-08-20T19:00:15+00:00

s3c24xx and s3c64xx have a lot in common, but are split across three separate directories, which makes the interaction of the header files more complicated than necessary. Move all three directories into a new mach-s3c, with a minimal set of changes to each file. Signed-off-by: Arnd Bergmann [krzk: Rebase, add s3c24xx and s3c64xx suffix to several files, add SPDX headers to new files, remove plat-samsung from MAINTAINERS] Co-developed-by: Krzysztof Kozlowski Signed-off-by: Krzysztof Kozlowski https://lore.kernel.org/r/20200806182059.2431-39-krzk@kernel.org

ARM: s3c: remove plat-samsung/.../samsung-time.h

2020-08-17T16:54:33+00:00

Remove the arch/arm/plat-samsung/include/plat/samsung-time.h header and move the contents to common.h headers in mach-s3c24xx and mach-s3c64xx. The definition of declared functions is already in common.c in mach directories, so it is logically to put declaration next to them. This is also one step further towards removal of plat-samsung directory and it fixes W=1 build warnings: arch/arm/mach-s3c64xx/common.c:174:13: warning: no previous prototype for 'samsung_set_timer_source' [-Wmissing-prototypes] arch/arm/mach-s3c64xx/common.c:180:13: warning: no previous prototype for 'samsung_timer_init' [-Wmissing-prototypes] Signed-off-by: Krzysztof Kozlowski Reviewed-by: Tomasz Figa

backlight: pwm_bl: Switch to full GPIO descriptor

2020-03-18T15:05:57+00:00

The PWM backlight still supports passing a enable GPIO line as platform data using the legacy API. It turns out that ever board using this mechanism except one is pass .enable_gpio = -1. So we drop all these cargo-culted -1's from all instances of this platform data in the kernel. The remaning board, Palm TC, is converted to pass a machine descriptior table with the "enable" GPIO instead, and delete the platform data entry for enable_gpio and the code handling it and things should work smoothly with the new API. Signed-off-by: Linus Walleij Acked-by: Robert Jarzmik Acked-by: Krzysztof Kozlowski Reviewed-by: Daniel Thompson Signed-off-by: Lee Jones

usb: phy: phy-gpio-vbus-usb: Convert to GPIO descriptors

2020-01-23T18:20:57+00:00

Instead of using the legacy GPIO API and keeping track on polarity inversion semantics in the driver, switch to use GPIO descriptors for this driver and change all consumers in the process. This makes it possible to retire platform data completely: the only remaining platform data member was "wakeup" which was intended to make the vbus interrupt wakeup capable, but was not set by any users and thus remained unused. VBUS was not waking any devices up. Leave a comment about it so later developers using the platform can consider setting it to always enabled so plugging in USB wakes up the platform. Cc: Daniel Mack Cc: Haojian Zhuang Acked-by: Robert Jarzmik Acked-by: Felipe Balbi Acked-by: Sylwester Nawrocki Acked-by: Philipp Zabel Signed-off-by: Linus Walleij Link: https://lore.kernel.org/r/20200123155013.93249-1-linus.walleij@linaro.org Signed-off-by: Greg Kroah-Hartman

spi: spi-gpio: Rewrite to use GPIO descriptors

2018-02-14T16:02:41+00:00

This converts the bit-banged GPIO SPI driver to looking up and using GPIO descriptors to get a handle on GPIO lines for SCK, MOSI, MISO and all CS lines. All existing board files are converted in one go to keep it all consistent. With these conversions I rarely find any interrim steps that makes any sense. Device tree probing and GPIO handling should work like before also after this patch. For board files, we stop using controller data to pass the GPIO line for chip select, instead we pass this as a GPIO descriptor lookup like everything else. In some s3c24xx machines the names of the SPI devices were set to "spi-gpio" rather than "spi_gpio" which can never have worked, I fixed it working (I guess) as part of this patch set. Sometimes I wonder how this code got upstream in the first place, it obviously is not tested. mach-s3c64xx/mach-smartq.c has the same problem and additionally defines the *same* GPIO line for MOSI and MISO which is not going to be accepted by gpiolib. As the lines were number 1,2,2 I assumed it was a typo and use lines 1,2,3. A comment gives awat that line 0 is chip select though no actual SPI device is provided for the LCD supposed to be on this bit-banged SPI bus. I left it intact instead of just deleting the bus though. Kill off board file code that try to initialize the SPI lines to the same values that they will later be set by the spi_gpio driver anyways. Given the huge number of weird things in these board files I do not think this code is very tested or put in with much afterthought anyways. In order to assert that we do not get performance regressions on this crucial bing-banged driver, a ran a script like this dumping the Ilitek ILI9322 regmap 10000 times (it has no caching obviously) on an otherwise idle system in two iterations before and after the patches: #!/bin/sh for run in `seq 10000` do cat /debug/regmap/spi0.0/registers > /dev/null done Before the patch: time test.sh real 3m 41.03s user 0m 29.41s sys 3m 7.22s time test.sh real 3m 44.24s user 0m 32.31s sys 3m 7.60s After the patch: time test.sh real 3m 41.32s user 0m 28.92s sys 3m 8.08s time test.sh real 3m 39.92s user 0m 30.20s sys 3m 5.56s So any performance differences seems to be in the error margin. Signed-off-by: Linus Walleij Acked-by: Olof Johansson Reviewed-by: Andy Shevchenko Signed-off-by: Mark Brown

ARM: S3C64XX: Add SPDX license identifiers

2018-01-03T17:42:53+00:00

Replace GPL license statements with SPDX license identifiers (GPL-2.0 and GPL-2.0+). Signed-off-by: Krzysztof Kozlowski Acked-by: Charles Keepax

ARM: s3c64xx: smartq: Avoid sparse warnings

2016-07-11T15:44:11+00:00

The smartq_map_io() and smartq_machine_init() functions are used by both SmartQ 5 and SmartQ 7 machines and exported via the mach-smartq.h header file. However that header file is not included by the mach-smartq.c file that implements them, causing sparse warnings. Include mach-smartq.h from mach-smartq.c to fix these warnings. Signed-off-by: Thierry Reding Signed-off-by: Krzysztof Kozlowski

ARM: s3c64xx: use new adc/touchscreen driver

2015-12-01T20:50:25+00:00

The old ADC and touchscreen drivers are not compatible with multiplatform support, but we can use the exynos-adc driver as a replacement. This changes the common device creation functions for s3c64xx (but not s3c24xx for now) to use the new driver. To do this, we have to pass the interrupt resources in the opposite order and pass the platform data in the adc device node. Signed-off-by: Arnd Bergmann

ASoC: samsung/smartq: use dynamic registration

2015-12-01T20:50:24+00:00

As a prerequisite for moving s3c64xx into multiplatform configurations, we need to change the smartq audio driver to stop using hardcoded gpio numbers from the header file, and instead pass the gpio data through platform_data. In order to do that, we also move the code to use module_platform_driver and register the platform device using platform_device_register_simple and register the gpios through the gpiod API. Signed-off-by: Arnd Bergmann Acked-by: Mark Brown Reviewed-by: Krzysztof Kozlowski

Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

2015-11-10T22:56:23+00:00

Pull ARM SoC platform updates from Olof Johansson: "New and/or improved SoC support for this release: Marvell Berlin: - Enable standard DT-based cpufreq - Add CPU hotplug support Freescale: - Ethernet init for i.MX7D - Suspend/resume support for i.MX6UL Allwinner: - Support for R8 chipset (used on NTC's $9 C.H.I.P board) Mediatek: - SMP support for some platforms Uniphier: - L2 support - Cleaned up SMP support, etc. plus a handful of other patches around above functionality, and a few other smaller changes" * tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (42 commits) ARM: uniphier: rework SMP operations to use trampoline code ARM: uniphier: add outer cache support Documentation: EXYNOS: Update bootloader interface on exynos542x ARM: mvebu: add broken-idle option ARM: orion5x: use mac_pton() helper ARM: at91: pm: at91_pm_suspend_in_sram() must be 8-byte aligned ARM: sunxi: Add R8 support ARM: digicolor: select pinctrl/gpio driver arm: berlin: add CPU hotplug support arm: berlin: use non-self-cleared reset register to reset cpu ARM: mediatek: add smp bringup code ARM: mediatek: enable gpt6 on boot up to make arch timer working soc: mediatek: Fix random hang up issue while kernel init soc: ti: qmss: make acc queue support optional in the driver soc: ti: add firmware file name as part of the driver Documentation: dt: soc: Add description for knav qmss driver ARM: S3C64XX: Use PWM lookup table for mach-smartq ARM: S3C64XX: Use PWM lookup table for mach-hmt ARM: S3C64XX: Use PWM lookup table for mach-crag6410 ARM: S3C64XX: Use PWM lookup table for smdk6410 ...