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authorHauke Mehrtens <hauke@hauke-m.de>2012-02-01 03:13:56 +0400
committerJohn W. Linville <linville@tuxdriver.com>2012-02-06 23:55:36 +0400
commitd486a5b4996d2fffd10098725781f2c5690774bc (patch)
tree4b57776194a09f2164494dfd3cde2121dfd9f791 /drivers/ssb/driver_chipcommon_pmu.c
parentbedb2a18af0a4e7565182c07fadd854e3ae8c9bc (diff)
downloadlinux-d486a5b4996d2fffd10098725781f2c5690774bc.tar.xz
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>
Diffstat (limited to 'drivers/ssb/driver_chipcommon_pmu.c')
-rw-r--r--drivers/ssb/driver_chipcommon_pmu.c48
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;
+ }
+}