From: Jagan Teki <jagan@amarulasolutions.com>
To: Maxime Ripard <maxime.ripard@bootlin.com>,
Chen-Yu Tsai <wens@csie.org>, Icenowy Zheng <icenowy@aosc.io>,
Jernej Skrabec <jernej.skrabec@siol.net>,
Vasily Khoruzhick <anarsoul@gmail.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
David Airlie <airlied@linux.ie>,
dri-devel@lists.freedesktop.org,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
linux-clk@vger.kernel.org,
Michael Trimarchi <michael@amarulasolutions.com>,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com
Cc: Jagan Teki <jagan@amarulasolutions.com>
Subject: [PATCH v3 03/25] clk: sunxi-ng: Add check for maximum rate to NKM PLLs
Date: Fri, 26 Oct 2018 20:13:22 +0530 [thread overview]
Message-ID: <20181026144344.27778-4-jagan@amarulasolutions.com> (raw)
In-Reply-To: <20181026144344.27778-1-jagan@amarulasolutions.com>
Some NKM PLLs, frequency can be set above PLL working range.
Add a constraint for maximum supported rate. This way, drivers can
specify which is maximum allowed rate for PLL.
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Tested-by: Jagan Teki <jagan@amarulasolutions.com>
---
Changes for v3:
- collect Stephen Ack
- add tested credit
Changes for v2:
- none
drivers/clk/sunxi-ng/ccu_nkm.c | 7 +++++++
drivers/clk/sunxi-ng/ccu_nkm.h | 1 +
2 files changed, 8 insertions(+)
diff --git a/drivers/clk/sunxi-ng/ccu_nkm.c b/drivers/clk/sunxi-ng/ccu_nkm.c
index d17539dc88dd..574fd2cd2a79 100644
--- a/drivers/clk/sunxi-ng/ccu_nkm.c
+++ b/drivers/clk/sunxi-ng/ccu_nkm.c
@@ -132,6 +132,13 @@ static unsigned long ccu_nkm_round_rate(struct ccu_mux_internal *mux,
return rate;
}
+ if (nkm->max_rate && rate > nkm->max_rate) {
+ rate = nkm->max_rate;
+ if (nkm->common.features & CCU_FEATURE_FIXED_POSTDIV)
+ rate /= nkm->fixed_post_div;
+ return rate;
+ }
+
ccu_nkm_find_best(*parent_rate, rate, &_nkm);
rate = *parent_rate * _nkm.n * _nkm.k / _nkm.m;
diff --git a/drivers/clk/sunxi-ng/ccu_nkm.h b/drivers/clk/sunxi-ng/ccu_nkm.h
index ff5bd00f429f..c82590481188 100644
--- a/drivers/clk/sunxi-ng/ccu_nkm.h
+++ b/drivers/clk/sunxi-ng/ccu_nkm.h
@@ -36,6 +36,7 @@ struct ccu_nkm {
unsigned int fixed_post_div;
unsigned int min_rate;
+ unsigned int max_rate;
struct ccu_common common;
};
--
2.18.0.321.gffc6fa0e3
next prev parent reply other threads:[~2018-10-26 14:44 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-26 14:43 [PATCH v3 00/25] drm/sun4i: Allwinner A64 MIPI-DSI support Jagan Teki
2018-10-26 14:43 ` [PATCH v3 01/25] clk: sunxi-ng: a64: Fix gate bit of DSI DPHY Jagan Teki
2018-10-26 14:43 ` [PATCH v3 02/25] clk: sunxi-ng: Add check for minimal rate to NKM PLLs Jagan Teki
2018-10-26 14:43 ` Jagan Teki [this message]
2018-10-26 14:43 ` [PATCH v3 04/25] drm/sun4i: sun6i_mipi_dsi: Add Allwinner A64 MIPI DSI support Jagan Teki
2018-10-26 14:43 ` [PATCH v3 05/25] dt-bindings: sun6i-dsi: Add compatible for A64 MIPI DSI Jagan Teki
2018-10-26 14:43 ` [PATCH v3 06/25] drm/sun4i: sun6i_mipi_dsi: Add DSI Generic short write 2 param transfer Jagan Teki
2018-10-29 9:17 ` Maxime Ripard
2018-10-26 14:43 ` [PATCH v3 07/25] drm/sun4i: sun6i_mipi_dsi: Fix VBP size calculation Jagan Teki
2018-10-26 14:43 ` [PATCH v3 08/25] drm/sun4i: sun6i_mipi_dsi: Fix TCON DRQ set bits Jagan Teki
2018-10-26 14:43 ` [PATCH v3 09/25] drm/sun4i: sun6i_mipi_dsi: Refactor vertical video start delay Jagan Teki
2018-10-26 14:43 ` [PATCH v3 10/25] drm/sun4i: sun6i_mipi_dsi: Fix DSI hbp timing value Jagan Teki
2018-10-26 14:43 ` [PATCH v3 11/25] drm/sun4i: sun6i_mipi_dsi: Fix DSI hblk timing calculation Jagan Teki
2018-10-26 14:43 ` [PATCH v3 12/25] drm/sun4i: sun6i_mipi_dsi: Add DSI hblk packet overhead Jagan Teki
2018-10-29 9:22 ` Maxime Ripard
2018-10-29 14:26 ` Jagan Teki
2018-11-05 8:31 ` Maxime Ripard
2018-10-26 14:43 ` [PATCH v3 13/25] drm/sun4i: sun6i_mipi_dsi: Fix DSI hfp timing value Jagan Teki
2018-10-26 14:43 ` [PATCH v3 14/25] drm/sun4i: sun6i_mipi_dsi: Increase hfp packet overhead Jagan Teki
2018-10-29 9:27 ` Maxime Ripard
2018-10-29 14:27 ` Jagan Teki
2018-11-05 8:33 ` Maxime Ripard
2018-10-26 14:43 ` [PATCH v3 15/25] drm/sun4i: sun6i_mipi_dsi: Set proper vblk timing calculation Jagan Teki
2018-10-29 9:30 ` Maxime Ripard
2018-10-26 14:43 ` [PATCH v3 16/25] drm/sun4i: sun6i_mipi_dsi: Add support for VCC-DSI voltage regulator Jagan Teki
2018-10-29 9:31 ` Maxime Ripard
2018-10-29 14:48 ` Jagan Teki
2018-11-05 8:34 ` Maxime Ripard
2018-10-26 14:43 ` [PATCH v3 17/25] dt-bindings: panel: Add Bananapi S070WV20-CT16 ICN6211 MIPI-DSI to RGB bridge Jagan Teki
2018-10-30 20:23 ` Rob Herring
2018-10-31 8:53 ` Andrzej Hajda
2018-10-31 8:58 ` Chen-Yu Tsai
2018-10-31 9:15 ` Andrzej Hajda
2018-11-06 18:08 ` Jagan Teki
2018-11-07 9:11 ` Andrzej Hajda
2018-11-10 7:32 ` Jagan Teki
2018-11-13 7:56 ` Andrzej Hajda
2018-11-18 18:20 ` Jagan Teki
2018-11-19 9:49 ` Andrzej Hajda
2018-10-31 9:15 ` [linux-sunxi] " Julian Calaby
2018-11-06 18:13 ` Jagan Teki
2018-11-07 10:20 ` Julian Calaby
2018-10-26 14:43 ` [PATCH v3 18/25] drm/panel: " Jagan Teki
2018-10-29 9:33 ` Maxime Ripard
2018-10-26 14:43 ` [PATCH v3 19/25] dt-bindings: panel: Add Techstar TS8550B MIPI DSI panel Jagan Teki
2018-10-30 20:27 ` Rob Herring
2018-10-26 14:43 ` [PATCH v3 20/25] drm/panel: Add Techstar TS8550B MIPI-DSI LCD panel Jagan Teki
2018-10-26 16:13 ` [linux-sunxi] " Priit Laes
2018-10-27 9:55 ` Jagan Teki
2018-10-27 16:27 ` Priit Laes
2018-10-26 14:43 ` [PATCH v3 21/25] clk: sunxi-ng: a64: Add min and max rate for PLL_MIPI Jagan Teki
2018-10-26 14:43 ` [PATCH v3 22/25] dt-bindings: sun6i-dsi: Add compatible for A64 DPHY Jagan Teki
2018-10-30 20:28 ` Rob Herring
2018-10-31 2:24 ` Chen-Yu Tsai
2018-10-26 14:43 ` [PATCH v3 23/25] arm64: dts: allwinner: a64: Add DSI pipeline Jagan Teki
2018-10-26 14:43 ` [PATCH v3 24/25] [DO NOT MERGE] arm64: dts: allwinner: bananapi-m64: Bananapi S070WV20-CT16 DSI panel Jagan Teki
2018-10-26 14:43 ` [PATCH v3 25/25] arm64: dts: allwinner: a64-amarula-relic: Enable Techstar TS8550B MIPI-DSI panel Jagan Teki
2018-10-29 9:15 ` [PATCH v3 00/25] drm/sun4i: Allwinner A64 MIPI-DSI support Maxime Ripard
2018-10-29 12:34 ` Jagan Teki
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