[PATCH v2 05/19] tty: serial: samsung: add gs101 earlycon support
From: Tudor Ambarus <tudor.ambarus@linaro.org>
Date: 2024-01-19 10:45:35
Also in:
linux-devicetree, linux-samsung-soc, linux-serial, lkml
Subsystem:
arm/samsung s3c, s5p and exynos arm architectures, the rest, tty layer and serial drivers · Maintainers:
Krzysztof Kozlowski, Peter Griffin, Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
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 <redacted> Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org> Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org> --- drivers/tty/serial/samsung_tty.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 7a1b1ca82511..80b8fcf9e025 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)
--
2.43.0.429.g432eaa2c6b-goog
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