Hi,
2015-02-14 7:05 GMT+09:00 Vladimir Barinov vladimir.barinov@cogentembedded.com:
The formula to calculate SCIF BRR for R-Car H2/M2/E2 SoCs is as follows:
BRR = pclk / (64 * 2^(2n-1) * baudrate) - 1, the prescaler is 0 due to SCSMR settings, hence n=0
Also SCSCR must be set to use internal or external clock source.
Signed-off-by: Vladimir Barinov vladimir.barinov@cogentembedded.com
Applied, thanks.
Best regards, Nobuhiro
drivers/serial/serial_sh.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/serial/serial_sh.h b/drivers/serial/serial_sh.h index 528aa73..941e6ed 100644 --- a/drivers/serial/serial_sh.h +++ b/drivers/serial/serial_sh.h @@ -227,7 +227,8 @@ struct uart_port { #elif defined(CONFIG_R8A7790) || defined(CONFIG_R8A7791) || \ defined(CONFIG_R8A7793) || defined(CONFIG_R8A7794) # define SCIF_ORER 0x0001 -# define SCSCR_INIT(port) 0x32 /* TIE=0,RIE=0,TE=1,RE=1,REIE=0, */ +# define SCSCR_INIT(port) (port->clk_mode == EXT_CLK ? 0x32 : 0x30)
/* TIE=0,RIE=0,TE=1,RE=1,REIE=0, */#else # error CPU subtype not defined #endif @@ -742,7 +743,7 @@ static inline int scbrr_calc(struct uart_port *port, int bps, int clk) #elif defined(CONFIG_R8A7790) || defined(CONFIG_R8A7791) || \ defined(CONFIG_R8A7793) || defined(CONFIG_R8A7794) #define DL_VALUE(bps, clk) (clk / bps / 16) /* External Clock */ -#define SCBRR_VALUE(bps, clk) ((clk+16*bps)/(32*bps)-1) /* Internal Clock */ +#define SCBRR_VALUE(bps, clk) (clk / bps / 32 - 1) /* Internal Clock */ #else /* Generic SH */ #define SCBRR_VALUE(bps, clk) ((clk+16*bps)/(32*bps)-1)
#endif
1.9.1
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