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From: Frank Oltmanns <frank@oltmanns.dev>
To: Maxime Ripard <mripard@kernel.org>,
	Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	Jernej Skrabec <jernej.skrabec@gmail.com>,
	Samuel Holland <samuel@sholland.org>,
	Andre Przywara <andre.przywara@arm.com>,
	Roman Beranek <me@crly.cz>
Cc: linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org,
	Frank Oltmanns <frank@oltmanns.dev>
Subject: [PATCH v5 04/11] clk: sunxi-ng: Add feature to find closest rate
Date: Sun, 06 Aug 2023 15:06:49 +0200	[thread overview]
Message-ID: <20230806-pll-mipi_set_rate_parent-v5-4-db4f5ca33fc3@oltmanns.dev> (raw)
In-Reply-To: <20230806-pll-mipi_set_rate_parent-v5-0-db4f5ca33fc3@oltmanns.dev>

The default behaviour of clocks in the sunxi-ng driver is to select a
clock rate that is closest to but less than the requested rate.

Add the CCU_FEATURE_CLOSEST_RATE flag, which can be used to allow clocks
to find the closest rate instead.

Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Frank Oltmanns <frank@oltmanns.dev>
---
 drivers/clk/sunxi-ng/ccu_common.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/sunxi-ng/ccu_common.h b/drivers/clk/sunxi-ng/ccu_common.h
index fbf16c6b896d..5ad219f041d5 100644
--- a/drivers/clk/sunxi-ng/ccu_common.h
+++ b/drivers/clk/sunxi-ng/ccu_common.h
@@ -18,6 +18,7 @@
 #define CCU_FEATURE_MMC_TIMING_SWITCH	BIT(6)
 #define CCU_FEATURE_SIGMA_DELTA_MOD	BIT(7)
 #define CCU_FEATURE_KEY_FIELD		BIT(8)
+#define CCU_FEATURE_CLOSEST_RATE	BIT(9)
 
 /* MMC timing mode switch bit */
 #define CCU_MMC_NEW_TIMING_MODE		BIT(30)

-- 
2.41.0


  parent reply	other threads:[~2023-08-06 13:07 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-06 13:06 [PATCH v5 00/11] clk: sunxi-ng: Consider alternative parent rates when determining NKM clock rate Frank Oltmanns
2023-08-06 13:06 ` [PATCH v5 01/11] clk: sunxi-ng: nkm: Use correct parameter name for parent HW Frank Oltmanns
2023-08-06 13:31   ` Jernej Škrabec
2023-08-06 13:06 ` [PATCH v5 02/11] clk: sunxi-ng: nkm: consider alternative parent rates when determining rate Frank Oltmanns
2023-08-06 13:32   ` Jernej Škrabec
2023-08-06 13:57     ` Frank Oltmanns
2023-08-06 13:06 ` [PATCH v5 03/11] clk: sunxi-ng: a64: allow pll-mipi to set parent's rate Frank Oltmanns
2023-08-06 13:32   ` Jernej Škrabec
2023-08-06 13:06 ` Frank Oltmanns [this message]
2023-08-06 13:33   ` [PATCH v5 04/11] clk: sunxi-ng: Add feature to find closest rate Jernej Škrabec
2023-08-06 13:06 ` [PATCH v5 05/11] clk: sunxi-ng: Add helper function " Frank Oltmanns
2023-08-06 13:41   ` Jernej Škrabec
2023-08-06 13:06 ` [PATCH v5 06/11] clk: sunxi-ng: nm: Support finding " Frank Oltmanns
2023-08-06 13:42   ` Jernej Škrabec
2023-08-06 13:06 ` [PATCH v5 07/11] clk: sunxi-ng: nkm: " Frank Oltmanns
2023-08-06 13:42   ` Jernej Škrabec
2023-08-06 13:06 ` [PATCH v5 08/11] clk: sunxi-ng: mux: " Frank Oltmanns
2023-08-06 13:42   ` Jernej Škrabec
2023-08-06 13:06 ` [PATCH v5 09/11] clk: sunxi-ng: div: " Frank Oltmanns
2023-08-06 13:42   ` Jernej Škrabec
2023-08-06 13:06 ` [PATCH v5 10/11] clk: sunxi-ng: a64: select closest rate for pll-video0 Frank Oltmanns
2023-08-06 13:48   ` Jernej Škrabec
2023-08-06 13:06 ` [PATCH v5 11/11] clk: sunxi-ng: nkm: Prefer current parent rate Frank Oltmanns
2023-08-06 13:43   ` Jernej Škrabec

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