lwn.git/arch/arm/mach-s3c24xx/mach-jive.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: s3c24xx: stop including mach/hardware.h from mach/io.h

2020-08-20T15:54:19+00:00

A number of other files rely on mach/map.h to be indirectly included from mach/io.h through mach/hardware.h. Reduce this to the minimal plat/map-base.h and add explicit includes everywhere else. Signed-off-by: Arnd Bergmann Link: https://lore.kernel.org/r/20200806182059.2431-38-krzk@kernel.org Signed-off-by: Krzysztof Kozlowski

fbdev: s3c2410fb: remove mach header dependency

2020-08-20T15:48:12+00:00

The s3c2410fb driver is too deeply intertwined with the s3c24xx platform code. Change it in a way that avoids the use of platform header files but having all interface data in a platform_data header, and the private register definitions next to the driver itself. One ugly bit here is that the driver pokes directly into gpio registers, which are owned by another driver. Passing the mapped addresses in platform_data is somewhat suboptimal, but it is a small improvement over the previous version. Signed-off-by: Arnd Bergmann Link: https://lore.kernel.org/r/20200806182059.2431-33-krzk@kernel.org Signed-off-by: Krzysztof Kozlowski

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

ARM: s3c24xx: jive: Fix some GPIO names

2018-04-26T14:55:03+00:00

One of the bitbanged SPI hosts had wrongly named GPIO lines due to sloppiness by yours truly. Cc: arm@kernel.org Cc: Mark Brown Signed-off-by: Linus Walleij Signed-off-by: Arnd Bergmann

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: S3C24XX: Add SPDX license identifiers

2018-01-03T17:36:43+00:00

Replace GPL license statements with SPDX license identifiers (GPL-2.0 and GPL-2.0+). The h1940-bluetooth.c was licensed under GPL-1.0. This also adds GPL-2.0 to few files lacking license statement. Signed-off-by: Krzysztof Kozlowski

mtd: nand: Rename nand.h into rawnand.h

2017-08-13T08:11:49+00:00

We are planning to share more code between different NAND based devices (SPI NAND, OneNAND and raw NANDs), but before doing that we need to move the existing include/linux/mtd/nand.h file into include/linux/mtd/rawnand.h so we can later create a nand.h header containing all common structure and function prototypes. Signed-off-by: Boris Brezillon Signed-off-by: Peter Pan Acked-by: Vladimir Zapolskiy Acked-by: Alexander Sverdlin Acked-by: Wenyou Yang Acked-by: Krzysztof Kozlowski Acked-by: Han Xu Acked-by: H Hartley Sweeten Acked-by: Shawn Guo Acked-by: Gregory CLEMENT Acked-by: Neil Armstrong Acked-by: Masahiro Yamada Acked-By: Harvey Hunt Acked-by: Tony Lindgren Acked-by: Krzysztof Halasa

ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol

2017-02-28T11:06:10+00:00

All low-level PM/SMP code using virt_to_phys() should actually use __pa_symbol() against kernel symbols. Update code where relevant to move away from virt_to_phys(). Acked-by: Russell King Reviewed-by: Laura Abbott Signed-off-by: Florian Fainelli Signed-off-by: Russell King

mtd: s3c2410: make ecc mode configurable via platform data

2016-11-07T13:48:35+00:00

Removing CONFIG_MTD_NAND_S3C2410_HWECC option and adding a ecc_mode field in the drivers's platform data structure so it can be selectable via platform data. Also setting this field to NAND_ECC_SOFT in all boards using this driver since none of them had CONFIG_MTD_NAND_S3C2410_HWECC enabled. Signed-off-by: Sergio Prado Acked-by: Krzysztof Kozlowski Signed-off-by: Boris Brezillon