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authorHauke Mehrtens <hauke@hauke-m.de>2012-07-09 22:03:10 +0200
committerJohn W. Linville <linville@tuxdriver.com>2012-07-11 15:40:22 -0400
commit650cef38263c0f4c8970265354432be154eef425 (patch)
tree667a1f5d8837a2a8fc86110e6abe3d78f1b43ad1 /drivers/bcma
parent9a89c3a856236ee6b68987dd0a0195010c3b801c (diff)
downloadlinux-650cef38263c0f4c8970265354432be154eef425.tar.bz2
bcma: add PMU clock support for BCM4706
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Tested-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/bcma')
-rw-r--r--drivers/bcma/driver_chipcommon_pmu.c40
1 files changed, 36 insertions, 4 deletions
diff --git a/drivers/bcma/driver_chipcommon_pmu.c b/drivers/bcma/driver_chipcommon_pmu.c
index 74a87d530424..44326178db29 100644
--- a/drivers/bcma/driver_chipcommon_pmu.c
+++ b/drivers/bcma/driver_chipcommon_pmu.c
@@ -226,6 +226,36 @@ static u32 bcma_pmu_clock(struct bcma_drv_cc *cc, u32 pll0, u32 m)
return (fc / div) * 1000000;
}
+static u32 bcma_pmu_clock_bcm4706(struct bcma_drv_cc *cc, u32 pll0, u32 m)
+{
+ u32 tmp, ndiv, p1div, p2div;
+ u32 clock;
+
+ BUG_ON(!m || m > 4);
+
+ /* Get N, P1 and P2 dividers to determine CPU clock */
+ tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PMU6_4706_PROCPLL_OFF);
+ ndiv = (tmp & BCMA_CC_PMU6_4706_PROC_NDIV_INT_MASK)
+ >> BCMA_CC_PMU6_4706_PROC_NDIV_INT_SHIFT;
+ p1div = (tmp & BCMA_CC_PMU6_4706_PROC_P1DIV_MASK)
+ >> BCMA_CC_PMU6_4706_PROC_P1DIV_SHIFT;
+ p2div = (tmp & BCMA_CC_PMU6_4706_PROC_P2DIV_MASK)
+ >> BCMA_CC_PMU6_4706_PROC_P2DIV_SHIFT;
+
+ tmp = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT);
+ if (tmp & BCMA_CC_CHIPST_4706_PKG_OPTION)
+ /* Low cost bonding: Fixed reference clock 25MHz and m = 4 */
+ clock = (25000000 / 4) * ndiv * p2div / p1div;
+ else
+ /* Fixed reference clock 25MHz and m = 2 */
+ clock = (25000000 / 2) * ndiv * p2div / p1div;
+
+ if (m == BCMA_CC_PMU5_MAINPLL_SSB)
+ clock = clock / 4;
+
+ return clock;
+}
+
/* query bus clock frequency for PMU-enabled chipcommon */
u32 bcma_pmu_get_clockcontrol(struct bcma_drv_cc *cc)
{
@@ -245,8 +275,8 @@ u32 bcma_pmu_get_clockcontrol(struct bcma_drv_cc *cc)
return bcma_pmu_clock(cc, BCMA_CC_PMU5357_MAINPLL_PLL0,
BCMA_CC_PMU5_MAINPLL_SSB);
case BCMA_CHIP_ID_BCM4706:
- return bcma_pmu_clock(cc, BCMA_CC_PMU4706_MAINPLL_PLL0,
- BCMA_CC_PMU5_MAINPLL_SSB);
+ return bcma_pmu_clock_bcm4706(cc, BCMA_CC_PMU4706_MAINPLL_PLL0,
+ BCMA_CC_PMU5_MAINPLL_SSB);
case BCMA_CHIP_ID_BCM53572:
return 75000000;
default:
@@ -267,6 +297,10 @@ u32 bcma_pmu_get_clockcpu(struct bcma_drv_cc *cc)
if (cc->pmu.rev >= 5) {
u32 pll;
switch (bus->chipinfo.id) {
+ case BCMA_CHIP_ID_BCM4706:
+ return bcma_pmu_clock_bcm4706(cc,
+ BCMA_CC_PMU4706_MAINPLL_PLL0,
+ BCMA_CC_PMU5_MAINPLL_CPU);
case BCMA_CHIP_ID_BCM5356:
pll = BCMA_CC_PMU5356_MAINPLL_PLL0;
break;
@@ -279,8 +313,6 @@ u32 bcma_pmu_get_clockcpu(struct bcma_drv_cc *cc)
break;
}
- /* TODO: if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
- return si_4706_pmu_clock(sih, osh, cc, PMU4706_MAINPLL_PLL0, PMU5_MAINPLL_CPU); */
return bcma_pmu_clock(cc, pll, BCMA_CC_PMU5_MAINPLL_CPU);
}