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serial: sh-sci: Make sci_scbrr_calc() public

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Make the function sci_scbrr_calc() public for code reuse to support RZ/G3E
RSCI IP.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/20251129164325.209213-15-biju.das.jz@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Biju Das 2025-11-29 16:43:10 +00:00 • committed by Greg Kroah-Hartman
parent 83c405ec3a
commit 5632bda5e8
2 changed files with 6 additions and 3 deletions
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3
drivers/tty/serial/sh-sci-common.h
View file

@ -169,6 +169,9 @@ void sci_port_enable(struct sci_port *sci_port);
int sci_startup(struct uart_port *port);
void sci_shutdown(struct uart_port *port);
int sci_scbrr_calc(struct sci_port *s, unsigned int bps, unsigned int *brr,
unsigned int *srr, unsigned int *cks);
#define min_sr(_port) ffs((_port)->sampling_rate_mask)
#define max_sr(_port) fls((_port)->sampling_rate_mask)

6
drivers/tty/serial/sh-sci.c
View file

@ -2573,9 +2573,8 @@ static int sci_brg_calc(struct sci_port *s, unsigned int bps,
}
/* calculate sample rate, BRR, and clock select */
static int sci_scbrr_calc(struct sci_port *s, unsigned int bps,
unsigned int *brr, unsigned int *srr,
unsigned int *cks)
int sci_scbrr_calc(struct sci_port *s, unsigned int bps, unsigned int *brr,
unsigned int *srr, unsigned int *cks)
{
unsigned long freq = s->clk_rates[SCI_FCK];
unsigned int sr, br, prediv, scrate, c;
@ -2639,6 +2638,7 @@ found:
min_err, *brr, *srr + 1, *cks);
return min_err;
}
EXPORT_SYMBOL_NS_GPL(sci_scbrr_calc, "SH_SCI");
static void sci_reset(struct uart_port *port)
{