[Qemu-devel] [PATCH] hw/misc/zynq_slcr: Change CPU clock rate

[Guenter Roeck]

The Linux kernel only accepts 333334 Khz and 666667 Khz clock rates, and
may crash if the actual clock rate is too low. The clock rate used to be
(ps-clk-frequency * 26 / 4), which resulted in a CPU frequency of
216666 Khz if ps-clk-frequency was set to 33333333 Hz. Change it to
(ps-clk-frequency * 20 / 2) = 333333 Khz to make Linux happy.

Signed-off-by: Guenter Roeck <address@hidden>
---
 hw/misc/zynq_slcr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/misc/zynq_slcr.c b/hw/misc/zynq_slcr.c
index 964f253..d3e1ce0 100644
--- a/hw/misc/zynq_slcr.c
+++ b/hw/misc/zynq_slcr.c
@@ -189,7 +189,7 @@ static void zynq_slcr_reset(DeviceState *d)
 
     s->regs[LOCKSTA] = 1;
     /* 0x100 - 0x11C */
-    s->regs[ARM_PLL_CTRL]   = 0x0001A008;
+    s->regs[ARM_PLL_CTRL]   = 0x00014008;
     s->regs[DDR_PLL_CTRL]   = 0x0001A008;
     s->regs[IO_PLL_CTRL]    = 0x0001A008;
     s->regs[PLL_STATUS]     = 0x0000003F;
@@ -198,7 +198,7 @@ static void zynq_slcr_reset(DeviceState *d)
     s->regs[IO_PLL_CFG]     = 0x00014000;
 
     /* 0x120 - 0x16C */
-    s->regs[ARM_CLK_CTRL]   = 0x1F000400;
+    s->regs[ARM_CLK_CTRL]   = 0x1F000200;
     s->regs[DDR_CLK_CTRL]   = 0x18400003;
     s->regs[DCI_CLK_CTRL]   = 0x01E03201;
     s->regs[APER_CLK_CTRL]  = 0x01FFCCCD;
-- 
2.1.4