dt-bindings: freescale: Add bindings for the tigerp module

Add bindings for the tigerp module present on i.MX51.

---
Changes since v3:
- None

 Documentation/devicetree/bindings/arm/freescale/tigerp.txt | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/freescale/tigerp.txt

new file mode 100644
index 0000000..19e2aad
@@ -0,0 +1,12 @@
+* Freescale Tigerp platform module
+
+Required properties:
+- compatible : Should be "fsl,imx51-tigerp"
+- reg : Address and length of the register set for the device
+
+Example:
+
+tigerp: tigerp at 83fa0000 {
+	compatible = "fsl,imx51-tigerp";
+	reg = <0x83fa0000 0x28>;
+};

2.7.4

Add PMU support in the device tree.

---
Changes since v3:
- None

 arch/arm/boot/dts/imx51.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

index 66e4187..113ddbc 100644
@@ -93,6 +93,12 @@
 		};
 	};
 
+	pmu: pmu {
+		compatible = "arm,cortex-a8-pmu";
+		interrupt-parent = <&tzic>;
+		interrupts = <77>;
+	};
+
 	usbphy0: usbphy0 {
 		compatible = "usb-nop-xceiv";
 		clocks = <&clks IMX5_CLK_USB_PHY_GATE>;

2.7.4

As per the i.MX51 Reference Manual add an entry for the 'tigerp' region in the device tree.

This is needed for accessing the ARM_GPC register to set the DBGEN bit, so that the debug clocks can be turned on.

---
Changes since v3:
- None

 arch/arm/boot/dts/imx51.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

index 113ddbc..da9d4ce 100644
@@ -451,6 +451,11 @@
 				clocks = <&clks IMX5_CLK_IIM_GATE>;
 			};
 
+			tigerp: tigerp at 83fa0000 {
+				compatible = "fsl,imx51-tigerp";
+				reg = <0x83fa0000 0x28>;
+			};
+
 			owire: owire at 83fa4000 {
 				compatible = "fsl,imx51-owire", "fsl,imx21-owire";
 				reg = <0x83fa4000 0x4000>;

2.7.4

As per the i.MX53 Reference Manual add an entry for the 'tigerp' region in the device tree.

This is needed for accessing the ARM_GPC register to set the DBGEN bit, so that the debug clocks can be turned on.

---
Changes since v3:
- None

 arch/arm/boot/dts/imx53.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

index 1a7a7bb..3fd553c 100644
@@ -672,6 +672,11 @@
 				status = "disabled";
 			};
 
+			tigerp: tigerp at 63fa0000 {
+				compatible = "fsl,imx53-tigerp", "fsl,imx51-tigerp";
+				reg = <0x63fa0000 0x28>;
+			};
+
 			owire: owire at 63fa4000 {
 				compatible = "fsl,imx53-owire", "fsl,imx21-owire";
 				reg = <0x63fa4000 0x4000>;

2.7.4

Add a label for the PMU node so that the board dts may be able to pass the 'secure-reg-access' property like this:

&pmu {
	secure-reg-access;
};

This also makes it consistent with the PMU node in imx6qdl.dtsi

---
Changes since v3:
- None

 arch/arm/boot/dts/imx53.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 3fd553c..6386185 100644
@@ -113,7 +113,7 @@
 		};
 	};
 
-	pmu {
+	pmu: pmu {
 		compatible = "arm,cortex-a8-pmu";
 		interrupt-parent = <&tzic>;
 		interrupts = <77>;

2.7.4

On i.MX51/i.MX53 it is necessary to set the DBGEN bit in ARM_GPC register in order to turn on the debug clocks.

The DBGEN bit of ARM_GPC register has the following description in the i.MX53 Reference Manual:

"This allows the user to manually activate clocks within the debug system. This register bit directly controls the platform's dbgen_out output signal which connects to the DAP_SYS to enable all debug clocks. Once enabled, the clocks cannot be disabled except by asserting the disable_trace input of the DAP_SYS."

Based on a previous patch from Sebastian Reichel.

---
Changes since v3:
- Add missing of_node_put()

 arch/arm/mach-imx/common.h     |  1 +
 arch/arm/mach-imx/cpu-imx5.c   | 45 ++++++++++++++++++++++++++++++++++++++++++
 arch/arm/mach-imx/mach-imx51.c |  2 +-
 arch/arm/mach-imx/mach-imx53.c |  2 +-
 4 files changed, 48 insertions(+), 2 deletions(-)

index 93225db7..423dd76 100644
@@ -62,6 +62,7 @@ void imx_gpc_set_arm_power_up_timing(u32 sw2iso, u32 sw);
 void imx_gpc_set_arm_power_down_timing(u32 sw2iso, u32 sw);
 void imx25_pm_init(void);
 void imx27_pm_init(void);
+void imx5_pmu_init(void);
 
 enum mxc_cpu_pwr_mode {
 	WAIT_CLOCKED,		/* wfi only */

index 3835b6a..8838fba 100644
@@ -52,7 +52,7 @@ static void __init imx51_dt_init(void)
 {
 	imx51_ipu_mipi_setup();
 	imx_src_init();
-
+	imx5_pmu_init();
 	imx_aips_allow_unprivileged_access("fsl,imx51-aipstz");
 }
 

index 07c2e8d..5ec7100 100644
@@ -31,7 +31,7 @@ static void __init imx53_init_early(void)
 static void __init imx53_dt_init(void)
 {
 	imx_src_init();
-
+	imx5_pmu_init();
 	imx_aips_allow_unprivileged_access("fsl,imx53-aipstz");
 }
 

2.7.4

Applied all, thanks.