diff options
| author | Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> | 2014-07-28 15:07:44 +0900 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2014-08-09 11:17:01 -0400 |
| commit | 53022c3113a6670d21f55262f511ae6a07bb3dc4 (patch) | |
| tree | 2a1df6874acffac3d13ef8c2d5064ded1248c501 /drivers/serial/serial_sh.c | |
| parent | 1a223c93240fd4bfaa05cc998b261d9560ca0f09 (diff) | |
serial: sh: Add support External Clock mode
R8A7780 and R7A7791 of rmobile supports External Clock mode, and these uses
different from Internal Clock mode registers and calculations to the baud rate
setting. This adds function for External Clock mode.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Diffstat (limited to 'drivers/serial/serial_sh.c')
| -rw-r--r-- | drivers/serial/serial_sh.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/serial/serial_sh.c b/drivers/serial/serial_sh.c index 0826d59ab2..144a925394 100644 --- a/drivers/serial/serial_sh.c +++ b/drivers/serial/serial_sh.c @@ -49,9 +49,15 @@ static struct uart_port sh_sci = { static void sh_serial_setbrg(void) { DECLARE_GLOBAL_DATA_PTR; - +#ifdef CONFIG_SCIF_USE_EXT_CLK + unsigned short dl = DL_VALUE(gd->baudrate, CONFIG_SH_SCIF_CLK_FREQ); + sci_out(&sh_sci, DL, dl); + /* Need wait: Clock * 1/dl × 1/16 */ + udelay((1000000 * dl * 16 / CONFIG_SYS_CLK_FREQ) * 1000 + 1); +#else sci_out(&sh_sci, SCBRR, SCBRR_VALUE(gd->baudrate, CONFIG_SH_SCIF_CLK_FREQ)); +#endif } static int sh_serial_init(void) |