From a8e5433cdc500290b52d26a05056e02c448a413c Mon Sep 17 00:00:00 2001 From: Jernej Skrabec Date: Thu, 9 Aug 2018 18:52:16 +0200 Subject: clk: sunxi-ng: nkmp: Add constraint for maximum rate Some, if not most, NKMP PLLs can be set to higher rate that is really supported by HW. Implement support for maximum frequency constrain for NKMP PLLs. Signed-off-by: Jernej Skrabec Signed-off-by: Maxime Ripard --- drivers/clk/sunxi-ng/ccu_nkmp.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/clk/sunxi-ng/ccu_nkmp.c') diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c index ebd9436d2c7c..9b49adb20d07 100644 --- a/drivers/clk/sunxi-ng/ccu_nkmp.c +++ b/drivers/clk/sunxi-ng/ccu_nkmp.c @@ -137,6 +137,13 @@ static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate, if (nkmp->common.features & CCU_FEATURE_FIXED_POSTDIV) rate *= nkmp->fixed_post_div; + if (nkmp->max_rate && rate > nkmp->max_rate) { + rate = nkmp->max_rate; + if (nkmp->common.features & CCU_FEATURE_FIXED_POSTDIV) + rate /= nkmp->fixed_post_div; + return rate; + } + _nkmp.min_n = nkmp->n.min ?: 1; _nkmp.max_n = nkmp->n.max ?: 1 << nkmp->n.width; _nkmp.min_k = nkmp->k.min ?: 1; -- cgit v1.2.3