static int clk_dfs_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct clk_dfs *dfs = to_clk_dfs(hw);
u32 mfi;
u32 portreset = readl_relaxed(DFS_PORTRESET(dfs->reg));
writel_relaxed( DFS_CTRL_DLL_RESET, DFS_CTRL(dfs->reg) );
writel_relaxed( portreset | ~DFS_PORTRESET_PORTRESET_SET(dfs->idx),
DFS_PORTRESET(dfs->reg) );
mfi = parent_rate/rate;
writel_relaxed( DFS_DVPORTn_MFI_SET(mfi) | DFS_DVPORTn_MFN_SET(dfs->mfn),
DFS_DVPORTn(dfs->reg,dfs->idx) );
writel_relaxed( ~DFS_CTRL_DLL_RESET, DFS_CTRL(dfs->reg) );
while( readl_relaxed(DFS_PORTSR(dfs->reg)) & (1 << (dfs->idx)) );
return 0;
}
/*
* Program the pll according to the input parameters.
* pll - ARM_PLL, PERIPH_PLL, ENET_PLL, DDR_PLL, VIDEO_PLL.
* refclk_freq - input reference clock frequency (FXOSC - 40 MHZ, FIRC - 48 MHZ)
* freq - expected output frequency for PHY0
* freq1 - expected output frequency for PHY1
* dfs_nr - number of DFS modules for current PLL
* dfs - array with the activation dfs field, mfn and mfi
* plldv_prediv - divider of clkfreq_ref
* plldv_mfd - loop multiplication factor divider
* pllfd_mfn - numerator loop multiplication factor divider
* Please consult the PLLDIG chapter of platform manual
* before to use this function.
*)
*/
static int program_pll(enum pll_type pll, u32 refclk_freq, u32 freq0, u32 freq1,
u32 dfs_nr, u32 dfs[][DFS_PARAMS_Nr], u32 plldv_prediv,
u32 plldv_mfd, u32 pllfd_mfn)
{
u32 i, rfdphi1, rfdphi, dfs_on = 0, fvco;
/*
* This formula is from platform reference manual (Rev. 1, 6/2015), PLLDIG chapter.
*/
fvco =
(refclk_freq / plldv_prediv) * (plldv_mfd +
pllfd_mfn / (float)20480);
/*
* VCO should have value in [ PLL_MIN_FREQ, PLL_MAX_FREQ ]. Please consult
* the platform DataSheet in order to determine the allowed values.
*/
if (fvco < PLL_MIN_FREQ || fvco > PLL_MAX_FREQ) {
return -1;
}
if (select_pll_source_clk(pll, refclk_freq) < 0) {
return -1;
}
rfdphi = fvco / freq0;
rfdphi1 = (freq1 == 0) ? 0 : fvco / freq1;
writel(PLLDIG_PLLDV_RFDPHI1_SET(rfdphi1) |
PLLDIG_PLLDV_RFDPHI_SET(rfdphi) |
PLLDIG_PLLDV_PREDIV_SET(plldv_prediv) |
PLLDIG_PLLDV_MFD(plldv_mfd), PLLDIG_PLLDV(pll));
writel(readl(PLLDIG_PLLFD(pll)) | PLLDIG_PLLFD_MFN_SET(pllfd_mfn) |
PLLDIG_PLLFD_SMDEN, PLLDIG_PLLFD(pll));
/* switch on the pll in current mode */
writel(readl(MC_ME_RUNn_MC(0)) | MC_ME_RUNMODE_MC_PLL(pll),
MC_ME_RUNn_MC(0));
entry_to_target_mode(MC_ME_MCTL_RUN0);
/* Only ARM_PLL, ENET_PLL and DDR_PLL */
if ((pll == ARM_PLL) || (pll == ENET_PLL) || (pll == DDR_PLL)) {
/* DFS clk enable programming */
writel(DFS_CTRL_DLL_RESET, DFS_CTRL(pll));
writel(DFS_DLLPRG1_CPICTRL_SET(0x5) |
DFS_DLLPRG1_VSETTLCTRL_SET(0x1) |
DFS_DLLPRG1_CALBYPEN_SET(0x0) |
DFS_DLLPRG1_DACIN_SET(0x1) | DFS_DLLPRG1_LCKWT_SET(0x0) |
DFS_DLLPRG1_V2IGC_SET(0x5), DFS_DLLPRG1(pll));
for (i = 0; i < dfs_nr; i++) {
if (dfs[i][0]) {
writel(DFS_DVPORTn_MFI_SET(dfs[i][2]) |
DFS_DVPORTn_MFN_SET(dfs[i][1]),
DFS_DVPORTn(pll, i));
dfs_on |= (dfs[i][0] << i);
}
}
writel(readl(DFS_CTRL(pll)) & ~DFS_CTRL_DLL_RESET,
DFS_CTRL(pll));
writel(readl(DFS_PORTRESET(pll)) &
~DFS_PORTRESET_PORTRESET_SET(dfs_on),
DFS_PORTRESET(pll));
while ((readl(DFS_PORTSR(pll)) & dfs_on) != dfs_on) ;
}
entry_to_target_mode(MC_ME_MCTL_RUN0);
return 0;
}