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[03/18] tty: serial: samsung: add gs101 earlycon support

Message ID 20240110102102.61587-4-tudor.ambarus@linaro.org
State Superseded
Headers show
Series serial: samsung: gs101 updates and winter cleanup | expand

Commit Message

Tudor Ambarus Jan. 10, 2024, 10:20 a.m. UTC 
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 <peter.griffin@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
---
 drivers/tty/serial/samsung_tty.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
diff mbox series

Patch

diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 20ec6ef1a52f..74bc5151dad4 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -2810,6 +2810,17 @@  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)