Uwe Kleine-König 0491709eb3 pwm: lpc18xx: Fix period handling ... [ Upstream commit 8933d30c5f ] The calculation: val = (u64)NSEC_PER_SEC * LPC18XX_PWM_TIMER_MAX; do_div(val, lpc18xx_pwm->clk_rate); lpc18xx_pwm->max_period_ns = val; is bogus because with NSEC_PER_SEC = 1000000000, LPC18XX_PWM_TIMER_MAX = 0xffffffff and clk_rate < NSEC_PER_SEC this overflows the (on lpc18xx (i.e. ARM32) 32 bit wide) unsigned int .max_period_ns. This results (dependant of the actual clk rate) in an arbitrary limitation of the maximal period. E.g. for clkrate = 333333333 (Hz) we get max_period_ns = 9 instead of 12884901897. So make .max_period_ns an u64 and pass period and duty as u64 to not discard relevant digits. And also make use of mul_u64_u64_div_u64() which prevents all overflows assuming clk_rate < NSEC_PER_SEC. Fixes: 841e6f90bb ("pwm: NXP LPC18xx PWM/SCT driver") Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-08-17 14:23:16 +02:00
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Kconfig	…
Makefile	…
core.c	…
pwm-ab8500.c	…
pwm-atmel-hlcdc.c	…
pwm-atmel-tcb.c	…
pwm-atmel.c	…
pwm-bcm-iproc.c	…
pwm-bcm-kona.c	…
pwm-bcm2835.c	…
pwm-berlin.c	…
pwm-brcmstb.c	…
pwm-clps711x.c	…
pwm-crc.c	…
pwm-cros-ec.c	…
pwm-dwc.c	…
pwm-ep93xx.c	…
pwm-fsl-ftm.c	…
pwm-hibvt.c	…
pwm-img.c	…
pwm-imx-tpm.c	…
pwm-imx1.c	…
pwm-imx27.c	…
pwm-intel-lgm.c	…
pwm-iqs620a.c	…
pwm-jz4740.c	…
pwm-keembay.c	…
pwm-lp3943.c	…
pwm-lpc18xx-sct.c	pwm: lpc18xx: Fix period handling	2022-08-17 14:23:16 +02:00
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-ntxec.c	…
pwm-omap-dmtimer.c	…
pwm-pca9685.c	…
pwm-pxa.c	…
pwm-raspberrypi-poe.c	pwm: raspberrypi-poe: Fix endianness in firmware struct	2022-06-14 18:36:04 +02:00
pwm-rcar.c	…
pwm-renesas-tpu.c	…
pwm-rockchip.c	…
pwm-samsung.c	…
pwm-sifive.c	pwm: sifive: Shut down hardware only after pwmchip_remove() completed	2022-08-17 14:23:15 +02:00
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-visconti.c	…
pwm-vt8500.c	…
sysfs.c	…