For example, A83T have nmp plls which are modelled as nkmp plls. Since k is not specified, it has offset 0, shift 0 and lowest value 1. This means that LSB bit is always set to 1, which may change clock rate.
Fix that by applying k factor only if k width is greater than 0.
Signed-off-by: Jernej Skrabec jernej.skrabec@siol.net --- drivers/clk/sunxi-ng/ccu_nkmp.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-)
diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c index e58c95787f94..709f528af2b3 100644 --- a/drivers/clk/sunxi-ng/ccu_nkmp.c +++ b/drivers/clk/sunxi-ng/ccu_nkmp.c @@ -81,7 +81,7 @@ static unsigned long ccu_nkmp_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { struct ccu_nkmp *nkmp = hw_to_ccu_nkmp(hw); - unsigned long n, m, k, p; + unsigned long n, m, k = 1, p; u32 reg;
reg = readl(nkmp->common.base + nkmp->common.reg); @@ -92,11 +92,13 @@ static unsigned long ccu_nkmp_recalc_rate(struct clk_hw *hw, if (!n) n++;
- k = reg >> nkmp->k.shift; - k &= (1 << nkmp->k.width) - 1; - k += nkmp->k.offset; - if (!k) - k++; + if (nkmp->k.width) { + k = reg >> nkmp->k.shift; + k &= (1 << nkmp->k.width) - 1; + k += nkmp->k.offset; + if (!k) + k++; + }
m = reg >> nkmp->m.shift; m &= (1 << nkmp->m.width) - 1; @@ -153,12 +155,15 @@ static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate,
reg = readl(nkmp->common.base + nkmp->common.reg); reg &= ~GENMASK(nkmp->n.width + nkmp->n.shift - 1, nkmp->n.shift); - reg &= ~GENMASK(nkmp->k.width + nkmp->k.shift - 1, nkmp->k.shift); + if (nkmp->k.width) + reg &= ~GENMASK(nkmp->k.width + nkmp->k.shift - 1, + nkmp->k.shift); reg &= ~GENMASK(nkmp->m.width + nkmp->m.shift - 1, nkmp->m.shift); reg &= ~GENMASK(nkmp->p.width + nkmp->p.shift - 1, nkmp->p.shift);
reg |= (_nkmp.n - nkmp->n.offset) << nkmp->n.shift; - reg |= (_nkmp.k - nkmp->k.offset) << nkmp->k.shift; + if (nkmp->k.width) + reg |= (_nkmp.k - nkmp->k.offset) << nkmp->k.shift; reg |= (_nkmp.m - nkmp->m.offset) << nkmp->m.shift; reg |= ilog2(_nkmp.p) << nkmp->p.shift;