This is a note to let you know that I've just added the patch titled pwm: jz4740: Fix build failure to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: pwm-jz4740-fix-build-failure.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From u.kleine-koenig@xxxxxxxxxxxxxx Tue Jul 14 18:58:26 2020 From: "Uwe Kleine-König" <u.kleine-koenig@xxxxxxxxxxxxxx> Date: Fri, 10 Jul 2020 12:27:58 +0200 Subject: pwm: jz4740: Fix build failure To: stable@xxxxxxxxxxxxxxx Cc: "H. Nikolaus Schaller" <hns@xxxxxxxxxxxxx>, Paul Cercueil <paul@xxxxxxxxxxxxxxx>, Thierry Reding <thierry.reding@xxxxxxxxx>, linux-pwm@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, letux-kernel@xxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, tsbogend@xxxxxxxxxxxxxxxx Message-ID: <20200710102758.8341-1-u.kleine-koenig@xxxxxxxxxxxxxx> From: "Uwe Kleine-König" <u.kleine-koenig@xxxxxxxxxxxxxx> When commit 9017dc4fbd59 ("pwm: jz4740: Enhance precision in calculation of duty cycle") from v5.8-rc1 was backported to v5.4.x its dependency on commit ce1f9cece057 ("pwm: jz4740: Use clocks from TCU driver") was not noticed which made the pwm-jz4740 driver fail to build. As ce1f9cece057 depends on still more rework, just backport a small part of this commit to make the driver build again. (There is no dependency on the functionality introduced in ce1f9cece057, just the rate variable is needed.) Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx> Reported-by: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/pwm/pwm-jz4740.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/pwm/pwm-jz4740.c +++ b/drivers/pwm/pwm-jz4740.c @@ -92,11 +92,12 @@ static int jz4740_pwm_apply(struct pwm_c { struct jz4740_pwm_chip *jz4740 = to_jz4740(pwm->chip); unsigned long long tmp; - unsigned long period, duty; + unsigned long rate, period, duty; unsigned int prescaler = 0; uint16_t ctrl; - tmp = (unsigned long long)clk_get_rate(jz4740->clk) * state->period; + rate = clk_get_rate(jz4740->clk); + tmp = rate * state->period; do_div(tmp, 1000000000); period = tmp; Patches currently in stable-queue which might be from u.kleine-koenig@xxxxxxxxxxxxxx are queue-5.4/pwm-jz4740-fix-build-failure.patch