From: Tudor Ambarus Date: Fri, 19 Jan 2024 10:45:12 +0000 (+0000) Subject: tty: serial: samsung: add gs101 earlycon support X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5887cab232f7abf4ff2e7701dec38b8f0feb4cff;p=linux.git tty: serial: samsung: add gs101 earlycon support The entire bus (PERIC) on which the GS101 serial resides only allows 32-bit register accesses. The reg-io-width dt property is disallowed for the "google,gs101-uart" compatible and instead the iotype is inferred from the compatible. Always set UPIO_MEM32 iotype for the gs101 earlycon. Reviewed-by: Peter Griffin Reviewed-by: Krzysztof Kozlowski Reviewed-by: Sam Protsenko Signed-off-by: Tudor Ambarus Link: https://lore.kernel.org/r/20240119104526.1221243-6-tudor.ambarus@linaro.org Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c index 7a1b1ca82511c..80b8fcf9e0259 100644 --- a/drivers/tty/serial/samsung_tty.c +++ b/drivers/tty/serial/samsung_tty.c @@ -2809,6 +2809,17 @@ OF_EARLYCON_DECLARE(exynos4210, "samsung,exynos4210-uart", OF_EARLYCON_DECLARE(artpec8, "axis,artpec8-uart", s5pv210_early_console_setup); +static int __init gs101_early_console_setup(struct earlycon_device *device, + const char *opt) +{ + /* gs101 always expects MMIO32 register accesses. */ + device->port.iotype = UPIO_MEM32; + + return s5pv210_early_console_setup(device, opt); +} + +OF_EARLYCON_DECLARE(gs101, "google,gs101-uart", gs101_early_console_setup); + /* Apple S5L */ static int __init apple_s5l_early_console_setup(struct earlycon_device *device, const char *opt)