diff options
| author | Hauke Mehrtens <hauke@hauke-m.de> | 2012-12-05 21:46:03 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-12-06 23:58:57 +0400 |
| commit | f924e1e989b0bdaf6472668400d67a2142cb6b60 (patch) | |
| tree | 7da7eb703e6c302c50bcc383f32bb576f474c595 /drivers/ssb/driver_chipcommon_pmu.c | |
| parent | a4855f39d4eb3f550ca5f4aac79bd999da42dc54 (diff) | |
| download | linux-f924e1e989b0bdaf6472668400d67a2142cb6b60.tar.xz | |
ssb: get alp clock from devices with PMU
If there is a PMU in the device, get the alp clock from that part and
do not assume 20000000.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/ssb/driver_chipcommon_pmu.c')
| -rw-r--r-- | drivers/ssb/driver_chipcommon_pmu.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/ssb/driver_chipcommon_pmu.c b/drivers/ssb/driver_chipcommon_pmu.c index d7d58044b4bc..a43415a7fbed 100644 --- a/drivers/ssb/driver_chipcommon_pmu.c +++ b/drivers/ssb/driver_chipcommon_pmu.c @@ -618,6 +618,33 @@ void ssb_pmu_set_ldo_paref(struct ssb_chipcommon *cc, bool on) EXPORT_SYMBOL(ssb_pmu_set_ldo_voltage); EXPORT_SYMBOL(ssb_pmu_set_ldo_paref); +static u32 ssb_pmu_get_alp_clock_clk0(struct ssb_chipcommon *cc) +{ + u32 crystalfreq; + const struct pmu0_plltab_entry *e = NULL; + + crystalfreq = chipco_read32(cc, SSB_CHIPCO_PMU_CTL) & + SSB_CHIPCO_PMU_CTL_XTALFREQ >> SSB_CHIPCO_PMU_CTL_XTALFREQ_SHIFT; + e = pmu0_plltab_find_entry(crystalfreq); + BUG_ON(!e); + return e->freq * 1000; +} + +u32 ssb_pmu_get_alp_clock(struct ssb_chipcommon *cc) +{ + struct ssb_bus *bus = cc->dev->bus; + + switch (bus->chip_id) { + case 0x5354: + ssb_pmu_get_alp_clock_clk0(cc); + default: + ssb_printk(KERN_ERR PFX + "ERROR: PMU alp clock unknown for device %04X\n", + bus->chip_id); + return 0; + } +} + u32 ssb_pmu_get_cpu_clock(struct ssb_chipcommon *cc) { struct ssb_bus *bus = cc->dev->bus; |