netdev - [PATCH net-next v2 08/10] ARM: dts: k2hk-netcp: add cpts refclk

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Date:   Thu, 6 Jun 2019 19:30:45 +0300
From:   Grygorii Strashko <grygorii.strashko@...com>
To:     "David S. Miller" <davem@...emloft.net>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Richard Cochran <richardcochran@...il.com>,
        Rob Herring <robh+dt@...nel.org>
CC:     Sekhar Nori <nsekhar@...com>,
        Murali Karicheri <m-karicheri2@...com>,
        Wingman Kwok <w-kwok2@...com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Grygorii Strashko <grygorii.strashko@...com>
Subject: [PATCH net-next v2 08/10] ARM: dts: k2hk-netcp: add cpts refclk_mux node

KeyStone 66AK2H/K 1G Ethernet Switch Subsystems, can control an external
multiplexer that selects one of up to 32 clocks for time sync reference
(RFTCLK) clock. This feature can be configured through CPTS_RFTCLK_SEL
register (offset: x08) in CPTS module and modelled as multiplexer clock.

Hence, add cpts-refclk-mux clock node which allows to mux one of SYSCLK2,
SYSCLK3, TIMI0, TIMI1, TSREFCLK clocks as CPTS reference clock [1] and
group all CPTS properties under "cpts" subnode.

[1] http://www.ti.com/lit/gpn/66ak2h14
Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
Acked-by: Richard Cochran <richardcochran@...il.com>
---
 arch/arm/boot/dts/keystone-k2hk-netcp.dtsi | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/keystone-k2hk-netcp.dtsi b/arch/arm/boot/dts/keystone-k2hk-netcp.dtsi
index e203145acbea..d5a6c1f5633c 100644
--- a/arch/arm/boot/dts/keystone-k2hk-netcp.dtsi
+++ b/arch/arm/boot/dts/keystone-k2hk-netcp.dtsi
@@ -152,8 +152,8 @@ netcp: netcp@...0000 {
 	/* NetCP address range */
 	ranges  = <0 0x2000000 0x100000>;
 
-	clocks = <&clkpa>, <&clkcpgmac>, <&chipclk12>;
-	clock-names = "pa_clk", "ethss_clk", "cpts";
+	clocks = <&clkpa>, <&clkcpgmac>;
+	clock-names = "pa_clk", "ethss_clk";
 	dma-coherent;
 
 	ti,navigator-dmas = <&dma_gbe 22>,
@@ -175,6 +175,22 @@ netcp: netcp@...0000 {
 			tx-queue = <648>;
 			tx-channel = "nettx";
 
+			cpts {
+				clocks = <&cpts_refclk_mux>;
+				clock-names = "cpts";
+
+				cpts_refclk_mux: cpts-refclk-mux {
+					#clock-cells = <0>;
+					clocks = <&chipclk12>, <&chipclk13>,
+						 <&timi0>, <&timi1>,
+						 <&tsrefclk>;
+					ti,mux-tbl = <0x0>, <0x1>, <0x2>,
+						<0x3>, <0x8>;
+					assigned-clocks = <&cpts_refclk_mux>;
+					assigned-clock-parents = <&chipclk12>;
+				};
+			};
+
 			interfaces {
 				gbe0: interface-0 {
 					slave-port = <0>;
-- 
2.17.1