Patch "ARM: dts: keystone-k2l: fix broken Ethernet due to disabled OSR" has been added to the 4.11-stable tree

This is a note to let you know that I've just added the patch titled

ARM: dts: keystone-k2l: fix broken Ethernet due to disabled OSR

to the 4.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
arm-dts-keystone-k2l-fix-broken-ethernet-due-to-disabled-osr.patch
and it can be found in the queue-4.11 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Murali Karicheri <[email protected]>
Date: Wed, 29 Mar 2017 16:02:18 +0530
Subject: ARM: dts: keystone-k2l: fix broken Ethernet due to disabled OSR

From: Murali Karicheri <[email protected]>

commit 791229f1d530a0f0a680a4c09f98199792485f33 upstream.

Ethernet networking on K2L has been broken since v4.11-rc1. This was caused by commit 32a34441a9bd ("ARM: keystone: dts: fix netcp clocks and add names"). This commit inadvertently moves on-chip static RAM clock to the end of list of clocks provided for netcp. Since keystone PM domain support does not have a list of recognized con_ids, only the first clock in the list comes under runtime PM management. This means the OSR (On-chip Static RAM) clock remains disabled and that broke networking on K2L.

The OSR is used by QMSS on K2L as an external linking RAM. However this is a standalone RAM that can be used for non-QMSS usage (as well as from DSP side). So add a SRAM device node for the same and add the OSR clock to the node.

Remove the now redundant OSR clock node from netcp.

To manage all clocks defined for netCP's use by runtime PM needs keystone generic power domain (genpd) driver support which is under works. Meanwhile, this patch restores K2L networking and is correct irrespective of any future genpd work since OSR is an independent module and not part of NetCP anyway.

---
 arch/arm/boot/dts/keystone-k2l-netcp.dtsi |    4 ++--
 arch/arm/boot/dts/keystone-k2l.dtsi       |    8 ++++++++
 2 files changed, 10 insertions(+), 2 deletions(-)

@@ -137,8 +137,8 @@ netcp: netcp@26000000 {
 	/* NetCP address range */
 	ranges = <0 0x26000000 0x1000000>;
 
-	clocks = <&clkpa>, <&clkcpgmac>, <&chipclk12>, <&clkosr>;
-	clock-names = "pa_clk", "ethss_clk", "cpts", "osr_clk";
+	clocks = <&clkpa>, <&clkcpgmac>, <&chipclk12>;
+	clock-names = "pa_clk", "ethss_clk", "cpts";
 	dma-coherent;
 
 	ti,navigator-dmas = <&dma_gbe 0>,

@@ -232,6 +232,14 @@
 			};
 		};
 
+		osr: sram@70000000 {
+			compatible = "mmio-sram";
+			reg = <0x70000000 0x10000>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			clocks = <&clkosr>;
+		};
+
 		dspgpio0: keystone_dsp_gpio@02620240 {
 			compatible = "ti,keystone-dsp-gpio";
 			gpio-controller;

Patches currently in stable-queue which might be from [email protected] are

queue-4.11/arm-dts-keystone-k2l-fix-broken-ethernet-due-to-disabled-osr.patch