diff options
| author | Timur Tabi <timur@freescale.com> | 2007-11-29 17:26:30 -0600 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2007-12-11 13:57:18 -0600 |
| commit | 7264ec4454e3a18d06a8949ecbe9e1b55e4f4685 (patch) | |
| tree | 3e9c4f86cfa5143ecab5634958d557a731733277 /arch/powerpc/sysdev/qe_lib | |
| parent | c5eeb5599938acb9cda8ff1ef846a26cf70d46e0 (diff) | |
[POWERPC] QE: change qe_setbrg() to take an enum qe_clock instead of an integer
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>
Diffstat (limited to 'arch/powerpc/sysdev/qe_lib')
| -rw-r--r-- | arch/powerpc/sysdev/qe_lib/qe.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c index 3d57d3835b0..1df3b4a6832 100644 --- a/arch/powerpc/sysdev/qe_lib/qe.c +++ b/arch/powerpc/sysdev/qe_lib/qe.c @@ -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 |