Merge tag 'late-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC i.MX DT changes from Olof Johansson:
 "This branch contains of devicetree changes for the Freescale i.MX
  platform.

  The base patch of the branch changes the format of the dts files to a
  slightly different format that makes it easier to do derivative board
  definitions, but it also introduces a lot of churn in the process
  since every line of the file is touched.

  On top of that are a handful of the regular changes; enabling more
  boards as DT-based instead of legacy board files (mx25pdk), enabling
  another driver for devicetree and thus adding bindings (onewire), etc.

  I'm not happy about the churn, and will likely not take it for other
  platforms in the future."

* tag 'late-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (21 commits)
  ARM: dts: add dtsi for imx6q and imx6dl
  ARM: dts: rename imx6q.dtsi to imx6qdl.dtsi
  ARM: dts: i.MX6: Add regulator delay support
  ARM: dts: Add device tree entry for onewire master on i.MX53
  ARM: i.MX53: Add clocks for i.mx53 onewire master.
  W1: Add device tree support to MXC onewire master.
  ARM: imx: enable imx6q-cpufreq support
  ARM: dts: Add apf51 basic support
  ARM i.MX6: change mxs usbphy clock usage
  ARM: dts: imx6q: Remove silicon version from SDMA firmware
  ARM i.MX53: dts: add oftree for MBa53 baseboard
  ARM i.MX53: add dts for the TQ tqma53 module
  ARM: dts: imx53: pinctrl update
  ARM i.MX51 babbage: Add keypad support
  ARM: dts: imx: Add imx51 KPP entry
  ARM: dts: imx25-karo-tx25: Put status entry in the end
  ARM: mx25pdk: Add device tree support
  ARM: dts: imx: use nodes label in board dts
  ARM: dts: add missing imx dtb targets
  ARM: boot: dts: Add an entry for imx27-pdk.dtb
  ...

1 files changed, 65 insertions, 0 deletions

diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index 1786b2d1257e..9ffd103b27e4 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -12,6 +12,7 @@
 
 #include <linux/clk.h>
 #include <linux/clkdev.h>
+#include <linux/cpu.h>
 #include <linux/delay.h>
 #include <linux/export.h>
 #include <linux/init.h>
@@ -22,6 +23,7 @@
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
+#include <linux/opp.h>
 #include <linux/phy.h>
 #include <linux/regmap.h>
 #include <linux/micrel_phy.h>
@@ -200,6 +202,64 @@ static void __init imx6q_init_machine(void)
 	imx6q_1588_init();
 }
 
+#define OCOTP_CFG3			0x440
+#define OCOTP_CFG3_SPEED_SHIFT		16
+#define OCOTP_CFG3_SPEED_1P2GHZ		0x3
+
+static void __init imx6q_opp_check_1p2ghz(struct device *cpu_dev)
+{
+	struct device_node *np;
+	void __iomem *base;
+	u32 val;
+
+	np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-ocotp");
+	if (!np) {
+		pr_warn("failed to find ocotp node\n");
+		return;
+	}
+
+	base = of_iomap(np, 0);
+	if (!base) {
+		pr_warn("failed to map ocotp\n");
+		goto put_node;
+	}
+
+	val = readl_relaxed(base + OCOTP_CFG3);
+	val >>= OCOTP_CFG3_SPEED_SHIFT;
+	if ((val & 0x3) != OCOTP_CFG3_SPEED_1P2GHZ)
+		if (opp_disable(cpu_dev, 1200000000))
+			pr_warn("failed to disable 1.2 GHz OPP\n");
+
+put_node:
+	of_node_put(np);
+}
+
+static void __init imx6q_opp_init(struct device *cpu_dev)
+{
+	struct device_node *np;
+
+	np = of_find_node_by_path("/cpus/cpu@0");
+	if (!np) {
+		pr_warn("failed to find cpu0 node\n");
+		return;
+	}
+
+	cpu_dev->of_node = np;
+	if (of_init_opp_table(cpu_dev)) {
+		pr_warn("failed to init OPP table\n");
+		goto put_node;
+	}
+
+	imx6q_opp_check_1p2ghz(cpu_dev);
+
+put_node:
+	of_node_put(np);
+}
+
+struct platform_device imx6q_cpufreq_pdev = {
+	.name = "imx6q-cpufreq",
+};
+
 static void __init imx6q_init_late(void)
 {
 	/*
@@ -208,6 +268,11 @@ static void __init imx6q_init_late(void)
 	 */
 	if (imx6q_revision() > IMX_CHIP_REVISION_1_1)
 		imx6q_cpuidle_init();
+
+	if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ)) {
+		imx6q_opp_init(&imx6q_cpufreq_pdev.dev);
+		platform_device_register(&imx6q_cpufreq_pdev);
+	}
 }
 
 static void __init imx6q_map_io(void)