diff options
Diffstat (limited to 'drivers/ssb/driver_chipcommon_pmu.c')
| -rw-r--r-- | drivers/ssb/driver_chipcommon_pmu.c | 48 |
1 files changed, 43 insertions, 5 deletions
diff --git a/drivers/ssb/driver_chipcommon_pmu.c b/drivers/ssb/driver_chipcommon_pmu.c index e5a2e0e9bc19..b58fef780ea0 100644 --- a/drivers/ssb/driver_chipcommon_pmu.c +++ b/drivers/ssb/driver_chipcommon_pmu.c @@ -13,6 +13,9 @@ #include <linux/ssb/ssb_driver_chipcommon.h> #include <linux/delay.h> #include <linux/export.h> +#ifdef CONFIG_BCM47XX +#include <asm/mach-bcm47xx/nvram.h> +#endif #include "ssb_private.h" @@ -92,10 +95,6 @@ static void ssb_pmu0_pllinit_r0(struct ssb_chipcommon *cc, u32 pmuctl, tmp, pllctl; unsigned int i; - if ((bus->chip_id == 0x5354) && !crystalfreq) { - /* The 5354 crystal freq is 25MHz */ - crystalfreq = 25000; - } if (crystalfreq) e = pmu0_plltab_find_entry(crystalfreq); if (!e) @@ -321,7 +320,11 @@ static void ssb_pmu_pll_init(struct ssb_chipcommon *cc) u32 crystalfreq = 0; /* in kHz. 0 = keep default freq. */ if (bus->bustype == SSB_BUSTYPE_SSB) { - /* TODO: The user may override the crystal frequency. */ +#ifdef CONFIG_BCM47XX + char buf[20]; + if (nvram_getenv("xtalfreq", buf, sizeof(buf)) >= 0) + crystalfreq = simple_strtoul(buf, NULL, 0); +#endif } switch (bus->chip_id) { @@ -330,7 +333,11 @@ static void ssb_pmu_pll_init(struct ssb_chipcommon *cc) ssb_pmu1_pllinit_r0(cc, crystalfreq); break; case 0x4328: + ssb_pmu0_pllinit_r0(cc, crystalfreq); + break; case 0x5354: + if (crystalfreq == 0) + crystalfreq = 25000; ssb_pmu0_pllinit_r0(cc, crystalfreq); break; case 0x4322: @@ -607,3 +614,34 @@ 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); + +u32 ssb_pmu_get_cpu_clock(struct ssb_chipcommon *cc) +{ + struct ssb_bus *bus = cc->dev->bus; + + switch (bus->chip_id) { + case 0x5354: + /* 5354 chip uses a non programmable PLL of frequency 240MHz */ + return 240000000; + default: + ssb_printk(KERN_ERR PFX + "ERROR: PMU cpu clock unknown for device %04X\n", + bus->chip_id); + return 0; + } +} + +u32 ssb_pmu_get_controlclock(struct ssb_chipcommon *cc) +{ + struct ssb_bus *bus = cc->dev->bus; + + switch (bus->chip_id) { + case 0x5354: + return 120000000; + default: + ssb_printk(KERN_ERR PFX + "ERROR: PMU controlclock unknown for device %04X\n", + bus->chip_id); + return 0; + } +} |