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ssb: add support for bcm5354 

This patch adds support the the BCM5354 SoC.
It has a PMU and a constant not configurable clock.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Hauke Mehrtens 2012-02-01 00:13:56 +01:00 committed by John W. Linville
parent bedb2a18af
commit d486a5b499
4 changed files with 53 additions and 5 deletions
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48
drivers/ssb/driver_chipcommon_pmu.c
View File

@ -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;
}
}

3
drivers/ssb/driver_mipscore.c
View File

@ -208,6 +208,9 @@ u32 ssb_cpu_clock(struct ssb_mipscore *mcore)
struct ssb_bus *bus = mcore->dev->bus;
u32 pll_type, n, m, rate = 0;
if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU)
return ssb_pmu_get_cpu_clock(&bus->chipco);
if (bus->extif.dev) {
ssb_extif_get_clockcontrol(&bus->extif, &pll_type, &n, &m);
} else if (bus->chipco.dev) {

3
drivers/ssb/main.c
View File

@ -1094,6 +1094,9 @@ u32 ssb_clockspeed(struct ssb_bus *bus)
u32 plltype;
u32 clkctl_n, clkctl_m;
if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU)
return ssb_pmu_get_controlclock(&bus->chipco);
if (ssb_extif_available(&bus->extif))
ssb_extif_get_clockcontrol(&bus->extif, &plltype,
&clkctl_n, &clkctl_m);

4
drivers/ssb/ssb_private.h
View File

@ -207,4 +207,8 @@ static inline void b43_pci_ssb_bridge_exit(void)
}
#endif /* CONFIG_SSB_B43_PCI_BRIDGE */
/* driver_chipcommon_pmu.c */
extern u32 ssb_pmu_get_cpu_clock(struct ssb_chipcommon *cc);
extern u32 ssb_pmu_get_controlclock(struct ssb_chipcommon *cc);
#endif /* LINUX_SSB_PRIVATE_H_ */