diff options
| author | Stefan Roese <sr@denx.de> | 2007-10-22 10:30:38 +0200 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2007-10-31 21:20:50 +0100 |
| commit | 764e7417ee5f6e25b1715720e7d7dd3487109385 (patch) | |
| tree | 66c6a025327fb80f6816508fb389b0f6b5cecee7 | |
| parent | 211ea91ac6c225bec7e668a03d0ba7d7310679fa (diff) | |
ppc4xx: Correct UART input clock calculation and passing to fdt
Signed-off-by: Stefan Roese <sr@denx.de>
| -rw-r--r-- | cpu/ppc4xx/fdt.c | 4 | ||||
| -rw-r--r-- | cpu/ppc4xx/serial.c | 15 |
2 files changed, 15 insertions, 4 deletions
diff --git a/cpu/ppc4xx/fdt.c b/cpu/ppc4xx/fdt.c index 44e95a5a91..bf97c2a435 100644 --- a/cpu/ppc4xx/fdt.c +++ b/cpu/ppc4xx/fdt.c @@ -85,11 +85,7 @@ static void do_fixup_uart(void *fdt, int offset, int i, bd_t *bd) debug("Updating node UART%d\n", i); -#if defined(CFG_EXT_SERIAL_CLOCK) - val = cpu_to_fdt32(CFG_EXT_SERIAL_CLOCK); -#else val = cpu_to_fdt32(sys_info.freqUART); -#endif rc = fdt_setprop(fdt, offset, "clock-frequency", &val, 4); if (rc) printf("Unable to update node UART, err=%s\n", fdt_strerror(rc)); diff --git a/cpu/ppc4xx/serial.c b/cpu/ppc4xx/serial.c index 8b1e2ffa0b..0fdef7e64f 100644 --- a/cpu/ppc4xx/serial.c +++ b/cpu/ppc4xx/serial.c @@ -528,12 +528,18 @@ int serial_init(void) udiv = 1; tmp = gd->baudrate * 16; bdiv = (CFG_EXT_SERIAL_CLOCK + tmp / 2) / tmp; + gd->freqUART = CFG_EXT_SERIAL_CLOCK; #else /* For 440, the cpu clock is on divider chain A, UART on divider * chain B ... so cpu clock is irrelevant. Get the "optimized" * values that are subject to the 1/2 opb clock constraint */ serial_divs (gd->baudrate, &udiv, &bdiv); + + /* Correct UART frequency in bd-info struct now that + * the UART divisor is available + */ + gd->freqUART = gd->freqUART / udiv; #endif reg |= (udiv - UDIV_SUBTRACT) << CR0_UDIV_POS; /* set the UART divisor */ @@ -644,6 +650,15 @@ int serial_init (void) bdiv = (clk + tmp / 2) / tmp; #endif /* CONFIG_405EX */ + /* Correct UART frequency in bd-info struct now that + * the UART divisor is available + */ +#ifdef CFG_EXT_SERIAL_CLOCK + gd->freqUART = CFG_EXT_SERIAL_CLOCK; +#else + gd->freqUART = gd->freqUART / udiv; +#endif + out8(UART_BASE + UART_LCR, 0x80); /* set DLAB bit */ out8(UART_BASE + UART_DLL, bdiv); /* set baudrate divisor */ out8(UART_BASE + UART_DLM, bdiv >> 8); /* set baudrate divisor */ |