R300_SCLK_CNTL2
tmp = RREG32_PLL(R300_SCLK_CNTL2);
WREG32_PLL(R300_SCLK_CNTL2, tmp);
tmp = RREG32_PLL(R300_SCLK_CNTL2);
WREG32_PLL(R300_SCLK_CNTL2, tmp);
tmp = RREG32_PLL(R300_SCLK_CNTL2);
WREG32_PLL(R300_SCLK_CNTL2, tmp);
tmp = RREG32_PLL(R300_SCLK_CNTL2);
WREG32_PLL(R300_SCLK_CNTL2, tmp);