Seung-Woo Kim 04d68dea26 pwm: samsung: Fix to use lowest div for large enough modulation bits ...

From pwm_samsung_calc_tin(), there is routine to find the lowest divider
possible to generate lower frequency than requested one. But it is
always possible to generate requested frequency with large enough
modulation bits except on s3c24xx, so this patch fixes to use lowest div
for the case. This patch removes following UBSAN warning:

   UBSAN: Undefined behaviour in drivers/pwm/pwm-samsung.c:197:13
   shift exponent 32 is too large for 32-bit type 'long unsigned int'
   [...]
   [<c0670248>] (ubsan_epilogue) from [<c06707b4>] (__ubsan_handle_shift_out_of_bounds+0xd8/0x120)
   [<c06707b4>] (__ubsan_handle_shift_out_of_bounds) from [<c0694b28>] (pwm_samsung_config+0x508/0x6a4)
   [<c0694b28>] (pwm_samsung_config) from [<c069286c>] (pwm_apply_state+0x174/0x40c)
   [<c069286c>] (pwm_apply_state) from [<c0b2e070>] (pwm_fan_probe+0xc8/0x488)
   [<c0b2e070>] (pwm_fan_probe) from [<c07ba8b0>] (platform_drv_probe+0x70/0x150)
   [...]

Cc: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

2016-09-06 10:48:55 +02:00

..

core.c

Merge branch 'for-4.8/capture' into for-next

2016-07-25 16:23:39 +02:00

Kconfig

pwm: Add ChromeOS EC PWM driver

2016-07-25 10:40:41 +02:00

Makefile

pwm: Add ChromeOS EC PWM driver

2016-07-25 10:40:41 +02:00

pwm-ab8500.c

pwm: drop owner assignment from platform_drivers

2014-10-20 16:21:28 +02:00

pwm-atmel-hlcdc.c

pwm: atmel-hlcdc: Fix default PWM polarity

2016-06-14 10:51:45 +02:00

pwm-atmel-tcb.c

misc: atmel_tclib: get and use slow clock

2015-10-06 12:33:14 +02:00

pwm-atmel.c

pwm: atmel: Use of_device_get_match_data()

2016-07-11 12:49:36 +02:00

pwm-bcm2835.c

pwm: bcm2835: Fix email address specification

2015-12-16 16:45:32 +01:00

pwm-bcm-iproc.c

pwm: Add support for Broadcom iProc PWM controller

2016-07-11 12:49:25 +02:00

pwm-bcm-kona.c

pwm: kona: Modify settings application sequence

2015-08-17 16:19:41 +02:00

pwm-berlin.c

pwm: berlin: Add suspend/resume support

2016-09-06 10:48:52 +02:00

pwm-bfin.c

pwm: drop owner assignment from platform_drivers

2014-10-20 16:21:28 +02:00

pwm-brcmstb.c

pwm: brcmstb: Fix check of devm_ioremap_resource() return code

2016-03-23 17:11:45 +01:00

pwm-clps711x.c

pwm: clps711x: Changing the compatibility string to match with the smallest supported chip

2016-07-06 17:38:17 +02:00

pwm-crc.c

pwm: Use pwm_get/set_xxx() helpers where appropriate

2016-05-17 14:44:59 +02:00

pwm-cros-ec.c

pwm: cros-ec: Add __packed to prevent padding

2016-09-06 10:48:54 +02:00

pwm-ep93xx.c

pwm: Add the pwm_is_enabled() helper

2015-07-20 09:46:06 +02:00

pwm-fsl-ftm.c

pwm: fsl-ftm: Use flat regmap cache

2016-04-14 16:54:00 +02:00

pwm-img.c

pwm: img: Test clock rate to avoid division by 0

2016-03-23 17:11:02 +01:00

pwm-imx.c

pwm: Make use of pwm_get_xxx() helpers where appropriate

2015-07-20 09:53:22 +02:00

pwm-jz4740.c

pwm: drop owner assignment from platform_drivers

2014-10-20 16:21:28 +02:00

pwm-lp3943.c

pwm: drop owner assignment from platform_drivers

2014-10-20 16:21:28 +02:00

pwm-lpc18xx-sct.c

pwm: Use pwm_get/set_xxx() helpers where appropriate

2016-05-17 14:44:59 +02:00

pwm-lpc32xx.c

pwm: lpc32xx: Set PWM_PIN_LEVEL bit to default value

2016-07-11 12:49:29 +02:00

pwm-lpss-pci.c

pwm: lpss: pci: Enable PWM module on Intel Edison

2016-07-11 12:07:25 +02:00

pwm-lpss-platform.c

pwm: lpss: Add support for runtime PM

2015-11-06 14:34:13 +01:00

pwm-lpss.c

pwm: lpss: Move clk_rate check to ->probe()

2016-07-11 12:49:24 +02:00

pwm-lpss.h

pwm: lpss: Update PWM setting for Broxton

2015-12-16 16:45:38 +01:00

pwm-mtk-disp.c

pwm: Add MediaTek MT2701 display PWM driver support

2016-09-06 10:48:53 +02:00

pwm-mxs.c

pwm: Add the pwm_is_enabled() helper

2015-07-20 09:46:06 +02:00

pwm-omap-dmtimer.c

pwm: omap-dmtimer: Allow for setting dmtimer clock source

2016-06-29 21:54:00 -07:00

pwm-pca9685.c

pwm-pca9685: enable ACPI device found on Galileo Gen2

2015-11-06 14:14:19 +01:00

pwm-puv3.c

pwm: drop owner assignment from platform_drivers

2014-10-20 16:21:28 +02:00

pwm-pxa.c

pwm: Introduce the pwm_args concept

2016-05-03 13:44:37 +02:00

pwm-rcar.c

pwm: rcar: Make use of pwm_is_enabled()

2016-05-17 14:44:57 +02:00

pwm-renesas-tpu.c

pwm: Add the pwm_is_enabled() helper

2015-07-20 09:46:06 +02:00

pwm-rockchip.c

pwm: rockchip: Add support for atomic update

2016-07-11 12:49:28 +02:00

pwm-samsung.c

pwm: samsung: Fix to use lowest div for large enough modulation bits

2016-09-06 10:48:55 +02:00

pwm-spear.c

pwm: drop owner assignment from platform_drivers

2014-10-20 16:21:28 +02:00

pwm-sti.c

pwm: sti: Maintain a bitmap of configured devices

2015-01-30 12:16:03 +01:00

pwm-stmpe.c

pwm: Add a driver for the STMPE PWM

2016-07-11 12:49:29 +02:00

pwm-sun4i.c

pwm: Use pwm_get/set_xxx() helpers where appropriate

2016-05-17 14:44:59 +02:00

pwm-tegra.c

pwm: tegra: Add support for Tegra186

2016-07-11 12:49:34 +02:00

pwm-tiecap.c

pwm: pwm-ti*: Remove support for local clock gating

2016-07-11 12:07:18 +02:00

pwm-tiehrpwm.c

pwm: pwm-ti*: Remove support for local clock gating

2016-07-11 12:07:18 +02:00

pwm-tipwmss.c

pwm: pwm-tipwmss: Remove all runtime PM gets/puts

2016-09-06 10:48:54 +02:00

pwm-twl-led.c

pwm: twl-led: Include linux/of.h header

2013-10-08 15:45:44 +02:00

pwm-twl.c

pwm: twl: Reliably disable TWL6030 PWMs

2016-09-05 07:13:47 +02:00

pwm-vt8500.c

pwm: drop owner assignment from platform_drivers

2014-10-20 16:21:28 +02:00

sysfs.c

Merge branch 'for-4.8/capture' into for-next

2016-07-25 16:23:39 +02:00