On Mon, 2024-09-09 at 16:37 +0800, Nick Chan wrote: > Apple's older A7-A9 SoCs seems to use bit 3 in UTRSTAT as RXTO, which is > enabled by bit 11 in UCON. > > Access these bits in addition to the original RXTO and RXTO enable bits, > to allow serial rx to function on A7-A9 SoCs. This change does not > appear to affect the A10 SoC and up. > > Signed-off-by: Nick Chan <towinchenmi@xxxxxxxxx> > [snip] > diff --git a/include/linux/serial_s3c.h b/include/linux/serial_s3c.h > index 1e8686695487..964a4fbf2626 100644 > --- a/include/linux/serial_s3c.h > +++ b/include/linux/serial_s3c.h > @@ -246,24 +246,28 @@ > S5PV210_UFCON_TXTRIG4 | \ > S5PV210_UFCON_RXTRIG4) > > -#define APPLE_S5L_UCON_RXTO_ENA 9 > -#define APPLE_S5L_UCON_RXTHRESH_ENA 12 > -#define APPLE_S5L_UCON_TXTHRESH_ENA 13 > -#define APPLE_S5L_UCON_RXTO_ENA_MSK BIT(APPLE_S5L_UCON_RXTO_ENA) > -#define APPLE_S5L_UCON_RXTHRESH_ENA_MSK BIT(APPLE_S5L_UCON_RXTHRESH_ENA) > -#define APPLE_S5L_UCON_TXTHRESH_ENA_MSK BIT(APPLE_S5L_UCON_TXTHRESH_ENA) > +#define APPLE_S5L_UCON_RXTO_ENA 9 > +#define APPLE_S5L_UCON_RXTO_LEGACY_ENA 11 > +#define APPLE_S5L_UCON_RXTHRESH_ENA 12 > +#define APPLE_S5L_UCON_TXTHRESH_ENA 13 > +#define APPLE_S5L_UCON_RXTO_ENA_MSK BIT(APPLE_S5L_UCON_RXTO_ENA) > +#define APPLE_S5L_UCON_RXTO_LEGACY_ENA_MSK BIT(APPLE_S5L_UCON_RXTO_LEGACY_ENA) > +#define APPLE_S5L_UCON_RXTHRESH_ENA_MSK BIT(APPLE_S5L_UCON_RXTHRESH_ENA) > +#define APPLE_S5L_UCON_TXTHRESH_ENA_MSK BIT(APPLE_S5L_UCON_TXTHRESH_ENA) Small thing, but other diff is not needed except APPLE_S5L_UCON_RXTO_LEGACY_ENA. Kwang. > > #define APPLE_S5L_UCON_DEFAULT (S3C2410_UCON_TXIRQMODE | \ > S3C2410_UCON_RXIRQMODE | \ > S3C2410_UCON_RXFIFO_TOI) > #define APPLE_S5L_UCON_MASK (APPLE_S5L_UCON_RXTO_ENA_MSK | \ > + APPLE_S5L_UCON_RXTO_LEGACY_ENA_MSK | \ > APPLE_S5L_UCON_RXTHRESH_ENA_MSK | \ > APPLE_S5L_UCON_TXTHRESH_ENA_MSK) > > +#define APPLE_S5L_UTRSTAT_RXTO_LEGACY BIT(3) > #define APPLE_S5L_UTRSTAT_RXTHRESH BIT(4) > #define APPLE_S5L_UTRSTAT_TXTHRESH BIT(5) > #define APPLE_S5L_UTRSTAT_RXTO BIT(9) > -#define APPLE_S5L_UTRSTAT_ALL_FLAGS (0x3f0) > +#define APPLE_S5L_UTRSTAT_ALL_FLAGS (0x3f8) > > #ifndef __ASSEMBLY__ >
