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e47685ec4c
[ Upstream commit 72d6b2459dbd539c1369149e501fdc3dc8ddef16 ]
If state->duty_cycle is 0x100000000000000, the previous calculation of
duty_scale overflows and yields a duty cycle ratio of 0% instead of
100%. Fix this by clamping the requested duty cycle to the maximal
possible duty cycle first. This way it is possible to use a native
integer division instead of a (depending on the architecture) more
expensive 64bit division.
With this change in place duty_scale cannot be bigger than 256 which
allows to simplify the calculation of duty_val.
Fixes:
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|---|---|---|
| .. | ||
| core.c | ||
| Kconfig | ||
| Makefile | ||
| pwm-ab8500.c | ||
| pwm-atmel-hlcdc.c | ||
| pwm-atmel-tcb.c | ||
| pwm-atmel.c | ||
| pwm-bcm2835.c | ||
| pwm-bcm-iproc.c | ||
| pwm-bcm-kona.c | ||
| pwm-berlin.c | ||
| pwm-brcmstb.c | ||
| pwm-clps711x.c | ||
| pwm-crc.c | ||
| pwm-cros-ec.c | ||
| pwm-ep93xx.c | ||
| pwm-fsl-ftm.c | ||
| pwm-hibvt.c | ||
| pwm-img.c | ||
| pwm-imx1.c | ||
| pwm-imx27.c | ||
| pwm-imx-tpm.c | ||
| pwm-iqs620a.c | ||
| pwm-jz4740.c | ||
| pwm-lp3943.c | ||
| pwm-lpc18xx-sct.c | ||
| pwm-lpc32xx.c | ||
| pwm-lpss-pci.c | ||
| pwm-lpss-platform.c | ||
| pwm-lpss.c | ||
| pwm-lpss.h | ||
| pwm-mediatek.c | ||
| pwm-meson.c | ||
| pwm-mtk-disp.c | ||
| pwm-mxs.c | ||
| pwm-omap-dmtimer.c | ||
| pwm-pca9685.c | ||
| pwm-pxa.c | ||
| pwm-rcar.c | ||
| pwm-renesas-tpu.c | ||
| pwm-rockchip.c | ||
| pwm-samsung.c | ||
| pwm-sifive.c | ||
| pwm-sl28cpld.c | ||
| pwm-spear.c | ||
| pwm-sprd.c | ||
| pwm-sti.c | ||
| pwm-stm32-lp.c | ||
| pwm-stm32.c | ||
| pwm-stmpe.c | ||
| pwm-sun4i.c | ||
| pwm-tegra.c | ||
| pwm-tiecap.c | ||
| pwm-tiehrpwm.c | ||
| pwm-twl-led.c | ||
| pwm-twl.c | ||
| pwm-vt8500.c | ||
| pwm-zx.c | ||
| sysfs.c | ||