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serial: sh-sci: Move SCBRR calculation algo in to platform data.

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This permits each port to select its own SCBRR calculation algorithm,
rather than having it all ifdef'ed in the header. There are presently
only 5 different variations that all parts fall under.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-06-24 18:23:52 +09:00
parent 00b9de9c24
commit 26c92f3728
27 changed files with 122 additions and 58 deletions
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9
include/linux/serial_sci.h
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@ -7,6 +7,14 @@
* Generic header for SuperH SCI(F) (used by sh/sh64/h8300 and related parts)
*/
enum {
SCBRR_ALGO_1, /* ((clk + 16 * bps) / (16 * bps) - 1) */
SCBRR_ALGO_2, /* ((clk + 16 * bps) / (32 * bps) - 1) */
SCBRR_ALGO_3, /* (((clk * 2) + 16 * bps) / (16 * bps) - 1) */
SCBRR_ALGO_4, /* (((clk * 2) + 16 * bps) / (32 * bps) - 1) */
SCBRR_ALGO_5, /* (((clk * 1000 / 32) / bps) - 1) */
};
#define SCSCR_TIE (1 << 7)
#define SCSCR_RIE (1 << 6)
#define SCSCR_TE (1 << 5)
@ -36,6 +44,7 @@ struct plat_sci_port {
upf_t flags; /* UPF_* flags */
char *clk; /* clock string */
unsigned int scbrr_algo_id; /* SCBRR calculation algo */
unsigned int scscr; /* SCSCR initialization */
};