Commit 5887cab2 authored by Tudor Ambarus's avatar Tudor Ambarus Committed by Greg Kroah-Hartman
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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: default avatarPeter Griffin <peter.griffin@linaro.org>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: default avatarSam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: default avatarTudor Ambarus <tudor.ambarus@linaro.org>
Link: https://lore.kernel.org/r/20240119104526.1221243-6-tudor.ambarus@linaro.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0b87a9fd

drivers/tty/serial/samsung_tty.c

+11 −0
Original line number Diff line number Diff line
@@ -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)