diff options
Diffstat (limited to 'drivers/clk/mediatek/clk-pll.c')
| -rw-r--r-- | drivers/clk/mediatek/clk-pll.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/clk/mediatek/clk-pll.c b/drivers/clk/mediatek/clk-pll.c index 18842d660317..67aaa3082d9b 100644 --- a/drivers/clk/mediatek/clk-pll.c +++ b/drivers/clk/mediatek/clk-pll.c @@ -32,6 +32,8 @@ #define AUDPLL_TUNER_EN BIT(31) #define POSTDIV_MASK 0x7 + +/* default 7 bits integer, can be overridden with pcwibits. */ #define INTEGER_BITS 7 /* @@ -68,12 +70,15 @@ static unsigned long __mtk_pll_recalc_rate(struct mtk_clk_pll *pll, u32 fin, u32 pcw, int postdiv) { int pcwbits = pll->data->pcwbits; - int pcwfbits; + int pcwfbits = 0; + int ibits; u64 vco; u8 c = 0; /* The fractional part of the PLL divider. */ - pcwfbits = pcwbits > INTEGER_BITS ? pcwbits - INTEGER_BITS : 0; + ibits = pll->data->pcwibits ? pll->data->pcwibits : INTEGER_BITS; + if (pcwbits > ibits) + pcwfbits = pcwbits - ibits; vco = (u64)fin * pcw; @@ -170,9 +175,10 @@ static void mtk_pll_set_rate_regs(struct mtk_clk_pll *pll, u32 pcw, static void mtk_pll_calc_values(struct mtk_clk_pll *pll, u32 *pcw, u32 *postdiv, u32 freq, u32 fin) { - unsigned long fmin = 1000 * MHZ; + unsigned long fmin = pll->data->fmin ? pll->data->fmin : (1000 * MHZ); const struct mtk_pll_div_table *div_table = pll->data->div_table; u64 _pcw; + int ibits; u32 val; if (freq > pll->data->fmax) @@ -196,7 +202,8 @@ static void mtk_pll_calc_values(struct mtk_clk_pll *pll, u32 *pcw, u32 *postdiv, } /* _pcw = freq * postdiv / fin * 2^pcwfbits */ - _pcw = ((u64)freq << val) << (pll->data->pcwbits - INTEGER_BITS); + ibits = pll->data->pcwibits ? pll->data->pcwibits : INTEGER_BITS; + _pcw = ((u64)freq << val) << (pll->data->pcwbits - ibits); do_div(_pcw, fin); *pcw = (u32)_pcw; |