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From: Tero Kristo <t-kristo@ti.com>
To: <linux-clk@vger.kernel.org>, <sboyd@kernel.org>,
	<mturquette@baylibre.com>
Cc: <linux-omap@vger.kernel.org>, <tony@atomide.com>,
	<aford173@gmail.com>, <tomi.valkeinen@ti.com>
Subject: [PATCH 4/4] ARM: dts: omap3: fix DPLL4 M4 divider max value
Date: Wed, 2 Oct 2019 15:06:11 +0300
Message-ID: <20191002120611.26121-5-t-kristo@ti.com> (raw)
In-Reply-To: <20191002120611.26121-1-t-kristo@ti.com>

The maximum divider value for DPLL4 M4 divider appears wrong. For most
OMAP3 family SoCs this is 16, but it is defined as 32, which is maybe
only valid for omap36xx. To avoid any overflows in trying to write this
register, set the max to 16 for all omap3 family, except omap36xx. For
omap36xx the maximum is set to 31, as it appears value 32 is not working
properly.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
---
 arch/arm/boot/dts/omap36xx-clocks.dtsi | 4 ++++
 arch/arm/boot/dts/omap3xxx-clocks.dtsi | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/omap36xx-clocks.dtsi b/arch/arm/boot/dts/omap36xx-clocks.dtsi
index e66fc57ec35d..4e9cc9003594 100644
--- a/arch/arm/boot/dts/omap36xx-clocks.dtsi
+++ b/arch/arm/boot/dts/omap36xx-clocks.dtsi
@@ -105,3 +105,7 @@
 			 <&mcbsp4_ick>, <&uart4_fck>;
 	};
 };
+
+&dpll4_m4_ck {
+	ti,max-div = <31>;
+};
diff --git a/arch/arm/boot/dts/omap3xxx-clocks.dtsi b/arch/arm/boot/dts/omap3xxx-clocks.dtsi
index 685c82a9d03e..0656c32439d2 100644
--- a/arch/arm/boot/dts/omap3xxx-clocks.dtsi
+++ b/arch/arm/boot/dts/omap3xxx-clocks.dtsi
@@ -416,7 +416,7 @@
 		#clock-cells = <0>;
 		compatible = "ti,divider-clock";
 		clocks = <&dpll4_ck>;
-		ti,max-div = <32>;
+		ti,max-div = <16>;
 		reg = <0x0e40>;
 		ti,index-starts-at-one;
 	};
-- 
2.17.1

--
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  parent reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-02 12:06 [PATCH 0/4] clk: ti: re-work divider clock support Tero Kristo
2019-10-02 12:06 ` [PATCH 1/4] clk: ti: divider: cleanup _register_divider and ti_clk_get_div_table Tero Kristo
2019-10-02 12:41   ` Adam Ford
2019-10-02 12:06 ` [PATCH 2/4] clk: ti: divider: cleanup ti_clk_parse_divider_data API Tero Kristo
2019-10-02 12:06 ` [PATCH 3/4] clk: ti: divider: convert to use min,max,mask instead of width Tero Kristo
2019-10-02 12:06 ` Tero Kristo [this message]
2019-10-24  8:03 ` [PATCH 0/4] clk: ti: re-work divider clock support Tero Kristo
2019-10-24 13:40   ` Tony Lindgren
2019-10-28  9:59   ` Stephen Boyd
2019-10-28 10:23     ` Tero Kristo
2019-10-28 11:36       ` Tomi Valkeinen
2019-10-28 13:57         ` Tony Lindgren

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