Messages in this thread Patch in this message | | | From | Jernej Skrabec <> | Subject | [PATCH 06/27] clk: sunxi-ng: h6: Set video PLLs limits | Date | Sun, 2 Sep 2018 09:26:22 +0200 |
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Video PLL factors can be set in a way that final PLL rate is outside stable range. H6 user manual specifically says that N factor should not be below 12. While it doesn't says anything about maximum stable rate, it is clear that PLL doesn't work at 6.096 GHz (254 * 24 MHz).
Set minimum allowed PLL video rate to 288 MHz (12 * 24 MHz) and maximum to 2.4 GHz, which is maximum in BSP driver.
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net> --- drivers/clk/sunxi-ng/ccu-sun50i-h6.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/clk/sunxi-ng/ccu-sun50i-h6.c b/drivers/clk/sunxi-ng/ccu-sun50i-h6.c index 2193e1495086..f44d314b2285 100644 --- a/drivers/clk/sunxi-ng/ccu-sun50i-h6.c +++ b/drivers/clk/sunxi-ng/ccu-sun50i-h6.c @@ -120,6 +120,8 @@ static struct ccu_nm pll_video0_clk = { .n = _SUNXI_CCU_MULT_MIN(8, 8, 12), .m = _SUNXI_CCU_DIV(1, 1), /* input divider */ .fixed_post_div = 4, + .min_rate = 288000000, + .max_rate = 2400000000, .common = { .reg = 0x040, .features = CCU_FEATURE_FIXED_POSTDIV, @@ -136,6 +138,8 @@ static struct ccu_nm pll_video1_clk = { .n = _SUNXI_CCU_MULT_MIN(8, 8, 12), .m = _SUNXI_CCU_DIV(1, 1), /* input divider */ .fixed_post_div = 4, + .min_rate = 288000000, + .max_rate = 2400000000, .common = { .reg = 0x048, .features = CCU_FEATURE_FIXED_POSTDIV, -- 2.18.0
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