diff options
| author | Jernej Skrabec <jernej.skrabec@siol.net> | 2018-11-04 19:26:41 +0100 |
|---|---|---|
| committer | Maxime Ripard <maxime.ripard@bootlin.com> | 2018-11-05 10:21:43 +0100 |
| commit | ed4433419d45bf8b58aef34c4450a27e1c8699e8 (patch) | |
| tree | d4f2cd971d2fe5111a2a197f3538b156d97186cb /drivers/clk/sunxi-ng | |
| parent | 65b6657672388b72822e0367f06d41c1e3ffb5bb (diff) | |
| download | lwn-ed4433419d45bf8b58aef34c4450a27e1c8699e8.tar.gz lwn-ed4433419d45bf8b58aef34c4450a27e1c8699e8.zip | |
clk: sunxi-ng: h6: Set video PLLs limits
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>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Diffstat (limited to 'drivers/clk/sunxi-ng')
| -rw-r--r-- | drivers/clk/sunxi-ng/ccu-sun50i-h6.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/clk/sunxi-ng/ccu-sun50i-h6.c b/drivers/clk/sunxi-ng/ccu-sun50i-h6.c index e2bc612f1d3e..139e8389615c 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 = 2400000000UL, .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 = 2400000000UL, .common = { .reg = 0x048, .features = CCU_FEATURE_FIXED_POSTDIV, |