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[POWERPC] QE: change qe_setbrg() to take an enum qe_clock instead of an integer

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qe_setbrg() currently takes an integer to indicate the BRG number.  Change that
to take an enum qe_clock instead, since this enum is intended to represent
clock sources.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Timur Tabi
2007-11-29 17:26:30 -06:00
committed by Kumar Gala
parent c5eeb55999
commit 7264ec4454
2 changed files with 56 additions and 52 deletions
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14
arch/powerpc/sysdev/qe_lib/qe.c
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@ -167,19 +167,20 @@ unsigned int get_brg_clk(void)
/* Program the BRG to the given sampling rate and multiplier
*
* @brg: the BRG, 1-16
* @brg: the BRG, QE_BRG1 - QE_BRG16
* @rate: the desired sampling rate
* @multiplier: corresponds to the value programmed in GUMR_L[RDCR] or
* GUMR_L[TDCR]. E.g., if this BRG is the RX clock, and GUMR_L[RDCR]=01,
* then 'multiplier' should be 8.
*
* Also note that the value programmed into the BRGC register must be even.
*/
void qe_setbrg(unsigned int brg, unsigned int rate, unsigned int multiplier)
int qe_setbrg(enum qe_clock brg, unsigned int rate, unsigned int multiplier)
{
u32 divisor, tempval;
u32 div16 = 0;
if ((brg < QE_BRG1) || (brg > QE_BRG16))
return -EINVAL;
divisor = get_brg_clk() / (rate * multiplier);
if (divisor > QE_BRGC_DIVISOR_MAX + 1) {
@ -196,8 +197,11 @@ void qe_setbrg(unsigned int brg, unsigned int rate, unsigned int multiplier)
tempval = ((divisor - 1) << QE_BRGC_DIVISOR_SHIFT) |
QE_BRGC_ENABLE | div16;
out_be32(&qe_immr->brg.brgc[brg - 1], tempval);
out_be32(&qe_immr->brg.brgc[brg - QE_BRG1], tempval);
return 0;
}
EXPORT_SYMBOL(qe_setbrg);
/* Initialize SNUMs (thread serial numbers) according to
* QE Module Control chapter, SNUM table