imx6: backport IMX6DL DVFS support from 3.15

This allows dynamic voltage and frequency scaling to work for IMX6DL CPU's.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42072 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/imx6/patches-3.14/0004-ARM-dts-imx6dl-enable-cpufreq-support.patch b/target/linux/imx6/patches-3.14/0004-ARM-dts-imx6dl-enable-cpufreq-support.patch
new file mode 100644 (file)
index 0000000..be5eefb
--- /dev/null
+++ b/target/linux/imx6/patches-3.14/0004-ARM-dts-imx6dl-enable-cpufreq-support.patch
@@ -0,0 +1,47 @@
+From 978ed904c17cd39700a5e1f95ee29ef4fee08ce9 Mon Sep 17 00:00:00 2001
+From: Anson Huang <b20788@freescale.com>
+Date: Thu, 19 Dec 2013 10:02:10 -0500
+Subject: [PATCH] ARM: dts: imx6dl: enable cpufreq support
+
+This patch adds cpufreq dts for i.mx6dl to support cpufreq driver.
+
+Signed-off-by: Anson Huang <b20788@freescale.com>
+Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
+---
+ arch/arm/boot/dts/imx6dl.dtsi | 20 ++++++++++++++++++++
+ 1 file changed, 20 insertions(+)
+
+diff --git a/arch/arm/boot/dts/imx6dl.dtsi b/arch/arm/boot/dts/imx6dl.dtsi
+index 80d0abe..9c4942f 100644
+--- a/arch/arm/boot/dts/imx6dl.dtsi
++++ b/arch/arm/boot/dts/imx6dl.dtsi
+@@ -22,6 +22,26 @@
+                       device_type = "cpu";
+                       reg = <0>;
+                       next-level-cache = <&L2>;
++                      operating-points = <
++                              /* kHz    uV */
++                              996000  1275000
++                              792000  1175000
++                              396000  1075000
++                      >;
++                      fsl,soc-operating-points = <
++                              /* ARM kHz  SOC-PU uV */
++                              996000  1175000
++                              792000  1175000
++                              396000  1175000
++                      >;
++                      clock-latency = <61036>; /* two CLK32 periods */
++                      clocks = <&clks 104>, <&clks 6>, <&clks 16>,
++                               <&clks 17>, <&clks 170>;
++                      clock-names = "arm", "pll2_pfd2_396m", "step",
++                                    "pll1_sw", "pll1_sys";
++                      arm-supply = <&reg_arm>;
++                      pu-supply = <&reg_pu>;
++                      soc-supply = <&reg_soc>;
+               };
+ 
+               cpu@1 {
+-- 
+2.0.3
+