android_kernel_motorola_sm6375/drivers/clocksource
Repository files (latest commit first)
Filename Latest commit message Latest commit date
Geert Uytterhoeven 805665aa52 clocksource/drivers/sh_cmt: Make sure channel clock supply is enabled
[ Upstream commit 2a97d55333e4299f32c98cca6dc5c4db1c5855fc ]

The Renesas Compare Match Timer 0 and 1 (CMT0/1) variants have a
register to control the clock supply to the individual channels.
Currently the driver does not touch this register, and relies on the
documented initial value, which has the clock supply enabled for all
channels present.

However, when Linux starts on the APE6-EVM development board, only the
clock supply to the first CMT1 channel is enabled.  Hence the first
channel (used as a clockevent) works, while the second channel (used as
a clocksource) does not.  Note that the default system clocksource is
the Cortex-A15 architectured timer, and the user needs to manually
switch to the CMT1 clocksource to trigger the broken behavior.

Fix this by removing the fragile dependency on implicit reset and/or
boot loader state, and by enabling the clock supply explicitly for all
channels used instead.  This requires postponing the clk_disable() call,
else the timer's registers cannot be accessed in sh_cmt_setup_channel().

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20201210194648.2901899-1-geert+renesas@glider.be
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-01-18 11:40:56 +01:00
..
acpi_pm.c clocksource: acpi_pm: fix return value of __setup handler 2022-04-15 14:18:05 +02:00
arc_timer.c
arm_arch_timer.c clocksource/arm_arch_timer: Improve Allwinner A64 timer workaround 2021-07-19 08:53:15 +02:00
arm_global_timer.c
armv7m_systick.c
asm9260_timer.c
bcm2835_timer.c
bcm_kona_timer.c
clksrc-dbx500-prcmu.c
clksrc_st_lpc.c
clps711x-timer.c
dummy_timer.c
dw_apb_timer.c clocksource: dw_apb_timer: Make CPU-affiliation being optional 2020-06-22 09:30:55 +02:00
dw_apb_timer_of.c clocksource: dw_apb_timer_of: Fix missing clockevent timers 2020-06-22 09:30:55 +02:00
em_sti.c
exynos_mct.c
h8300_timer8.c clocksource/drivers/h8300_timer8: Fix wrong return value in h8300_8timer_init() 2020-10-01 13:18:16 +02:00
h8300_timer16.c
h8300_tpu.c
hyperv_timer.c clocksource: hyper-v: unexport __init-annotated hv_init_clocksource() 2022-06-22 14:11:21 +02:00
i8253.c
ingenic-timer.c
jcore-pit.c
Kconfig clocksource/drivers/timer-ti-dm: Select TIMER_OF 2021-11-17 09:48:39 +01:00
Makefile
mips-gic-timer.c
mmio.c
mps2-timer.c
mxs_timer.c clocksource/drivers/mxs_timer: Add missing semicolon when DEBUG is defined 2021-03-04 10:26:29 +01:00
nomadik-mtu.c
numachip.c
renesas-ostm.c
samsung_pwm_timer.c
scx200_hrt.c
sh_cmt.c clocksource/drivers/sh_cmt: Make sure channel clock supply is enabled 2023-01-18 11:40:56 +01:00
sh_mtu2.c
sh_tmu.c
timer-armada-370-xp.c
timer-atcpit100.c
timer-atlas7.c
timer-atmel-pit.c
timer-atmel-st.c
timer-atmel-tcb.c
timer-cadence-ttc.c clocksource/drivers/cadence_ttc: Fix memory leak in ttc_setup_clockevent() 2020-12-30 11:51:17 +01:00
timer-cs5535.c
timer-davinci.c
timer-digicolor.c
timer-efm32.c
timer-fsl-ftm.c
timer-fttmr010.c
timer-gx6605s.c clocksource/drivers/timer-gx6605s: Fixup counter reload 2020-10-07 08:01:25 +02:00
timer-imx-gpt.c
timer-imx-sysctr.c
timer-imx-tpm.c
timer-integrator-ap.c
timer-ixp4xx.c clocksource/drivers/ixp4xx: remove EXPORT_SYMBOL_GPL from ixp4xx_timer_setup() 2022-07-07 17:36:53 +02:00
timer-keystone.c
timer-lpc32xx.c
timer-mediatek.c
timer-meson6.c
timer-milbeaut.c
timer-mp-csky.c
timer-npcm7xx.c
timer-nps.c
timer-of.c clocksource/drivers/timer-of: Check return value of of_iomap in timer_of_base_init() 2022-04-15 14:18:05 +02:00
timer-of.h
timer-orion.c clocksource/drivers/orion: Add missing clk_disable_unprepare() on error path 2020-12-30 11:51:17 +01:00
timer-owl.c
timer-oxnas-rps.c clocksource/drivers/oxnas-rps: Fix irq_of_parse_and_map() return value 2022-06-14 18:11:54 +02:00
timer-pistachio.c
timer-prima2.c
timer-probe.c
timer-pxa.c
timer-qcom.c
timer-rda.c
timer-riscv.c Revert "clocksource/drivers/riscv: Events are stopped during CPU suspend" 2022-12-08 11:23:06 +01:00
timer-rockchip.c
timer-sp.h
timer-sp804.c clocksource/drivers/sp804: Avoid error on multiple instances 2022-06-14 18:12:00 +02:00
timer-sprd.c
timer-stm32.c
timer-sun4i.c
timer-sun5i.c
timer-tango-xtal.c
timer-tegra.c
timer-ti-32k.c
timer-ti-dm.c
timer-u300.c
timer-versatile.c
timer-vf-pit.c
timer-vt8500.c
timer-zevio.c