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kernel_samsung_a53x/drivers/tty/serial
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Hugo Villeneuve 973fdf7efa serial: max310x: improve crystal stable clock detection 
commit 93cd256ab224c2519e7c4e5f58bb4f1ac2bf0965 upstream.

Some people are seeing a warning similar to this when using a crystal:

    max310x 11-006c: clock is not stable yet

The datasheet doesn't mention the maximum time to wait for the clock to be
stable when using a crystal, and it seems that the 10ms delay in the driver
is not always sufficient.

Jan Kundrát reported that it took three tries (each separated by 10ms) to
get a stable clock.

Modify behavior to check stable clock ready bit multiple times (20), and
waiting 10ms between each try.

Note: the first draft of the driver originally used a 50ms delay, without
checking the clock stable bit.
Then a loop with 1000 retries was implemented, each time reading the clock
stable bit.

Fixes: 4cf9a888fd3c ("serial: max310x: Check the clock readiness")
Cc: stable@vger.kernel.org
Suggested-by: Jan Kundrát <jan.kundrat@cesnet.cz>
Link: https://www.spinics.net/lists/linux-serial/msg35773.html
Link: https://lore.kernel.org/all/20240110174015.6f20195fde08e5c9e64e5675@hugovil.com/raw
Link: e5dfe3e4a7
Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Link: https://lore.kernel.org/r/20240116213001.3691629-3-hugo@hugovil.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-11-18 12:13:31 +01:00
..
8250 serial: 8250: omap: Don't skip resource freeing if pm_runtime_resume_and_get() failed 2024-11-18 12:12:49 +01:00
cpm_uart Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
jsm Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
21285.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
altera_jtaguart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
altera_uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
amba-pl010.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
amba-pl011.c ARM: PL011: Fix DMA support 2024-11-18 12:11:46 +01:00
amba-pl011.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
apbuart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
apbuart.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ar933x_uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
arc_uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
atmel_serial.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
atmel_serial.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
bcm63xx_uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
clps711x.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
digicolor-usart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
dz.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
dz.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
earlycon-arm-semihost.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
earlycon-riscv-sbi.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
earlycon.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
efm32-uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
exynos_tty.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
exynos_tty.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
fsl_linflexuart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
fsl_lpuart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
icom.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
icom.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ifx6x60.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ifx6x60.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
imx.c serial: imx: Correct clock error message in function probe() 2024-11-18 12:12:50 +01:00
imx_earlycon.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ip22zilog.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ip22zilog.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Kconfig Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
kgdb_nmi.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
kgdboc.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
lantiq.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
lpc32xx_hs.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Makefile Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
max310x.c serial: max310x: improve crystal stable clock detection 2024-11-18 12:13:31 +01:00
max3100.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mcf.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
men_z135_uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
meson_uart.c tty: serial: meson: fix hard LOCKUP on crtscts mode 2024-11-18 11:43:26 +01:00
milbeaut_usio.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mpc52xx_uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mps2-uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
msm_geni_serial_earlycon.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
msm_serial.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mux.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mvebu-uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mxs-auart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
omap-serial.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
owl-uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pch_uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pic32_uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pic32_uart.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pmac_zilog.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pmac_zilog.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pnx8xxx_uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pxa.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
qcom_geni_serial.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
rda-uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
rp2.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sa1100.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
samsung_tty.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sb1250-duart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sc16is7xx.c serial: sc16is7xx: add check for unsupported SPI modes during probe 2024-11-18 12:12:55 +01:00
sccnxp.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
serial-tegra.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
serial_core.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
serial_mctrl_gpio.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
serial_mctrl_gpio.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
serial_txx9.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sh-sci.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sh-sci.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sifive.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sirfsoc_uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sirfsoc_uart.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sprd_serial.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
st-asc.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
stm32-usart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
stm32-usart.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
suncore.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sunhv.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sunsab.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sunsab.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sunsu.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sunzilog.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sunzilog.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
tegra-tcu.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
timbuart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
timbuart.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
uartlite.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ucc_uart.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vr41xx_siu.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vt8500_serial.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
xilinx_uartps.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
zs.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
zs.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00