Re: [PATCH 6/8] tty: serial: Make SERIAL_SAMSUNG=y impossible when EXYNOS_USI_V2=m
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-11-28 14:29:10
Also in:
linux-arm-kernel, linux-i2c, linux-samsung-soc, linux-serial, linux-spi, lkml
On Sun, Nov 28, 2021 at 12:32:51AM +0200, Sam Protsenko wrote:
quoted hunk ↗ jump to hunk
When UART is encapsulated in USIv2 block (e.g. in Exynos850), USIv2 driver must be loaded first, as it's preparing USI hardware for particular protocol use. Make it impossible for Samsung serial driver to be built-in when USIv2 driver is built as a module, to prevent incorrect booting order for those drivers. Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> --- drivers/tty/serial/Kconfig | 1 + 1 file changed, 1 insertion(+)diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 0e5ccb25bdb1..47bc24e74041 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig@@ -237,6 +237,7 @@ config SERIAL_CLPS711X_CONSOLE config SERIAL_SAMSUNG tristate "Samsung SoC serial support" depends on PLAT_SAMSUNG || ARCH_S5PV210 || ARCH_EXYNOS || ARCH_APPLE || COMPILE_TEST + depends on EXYNOS_USI_V2 || !EXYNOS_USI_V2
That's odd, and is not going to help if everything is built as a module and loaded that way. This needs to be done properly in code to handle the issues if the "wrong" code is loaded first. Please trigger off of the hardware type correctly so you don't have to worry about this at all. thanks, greg k-h