| Message ID | 20231228125805.661725-7-tudor.ambarus@linaro.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | GS101 Oriole: CMU_PERIC0 support and USI updates | expand |
Hi Tudor, On Thu, 28 Dec 2023 at 12:58, Tudor Ambarus <tudor.ambarus@linaro.org> wrote: > > 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. > > Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org> That's a nice addition to avoid folks shooting themselves in the foot when enabling earlycon. Reviewed-by: Peter Griffin <peter.griffin@linaro.org> > --- > v2: update commit message > > 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 938127179acf..2fbaaf0e756b 100644 > --- a/drivers/tty/serial/samsung_tty.c > +++ b/drivers/tty/serial/samsung_tty.c > @@ -2812,6 +2812,17 @@ 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) > -- > 2.43.0.472.g3155946c3a-goog >
diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c index 938127179acf..2fbaaf0e756b 100644 --- a/drivers/tty/serial/samsung_tty.c +++ b/drivers/tty/serial/samsung_tty.c @@ -2812,6 +2812,17 @@ 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)
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. Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org> --- v2: update commit message drivers/tty/serial/samsung_tty.c | 11 +++++++++++ 1 file changed, 11 insertions(+)