Merge tag 'tegra-for-5.1-dt-bindings' of...

Merge tag 'tegra-for-5.1-dt-bindings' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/dt

dt-bindings: tegra: Changes for v5.1-rc1

This contains device tree binding updates for CPU frequency scaling on
Tegra210, BPMP support on Tegra210 and support for NVIDIA Shield TV.

* tag 'tegra-for-5.1-dt-bindings' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  dt-bindings: cpufreq: tegra124: remove cpu_lp clock from required properties
  dt-bindings: cpufreq: tegra124: remove vdd-cpu-supply from required properties
  dt-bindings: clock: tegra124-dfll: add Tegra210 support
  dt-bindings: clock: tegra124-dfll: Update DFLL binding for PWM regulator
  dt-bindings: firmware: tegra186-bpmp: Remove name property
  dt-bindings: firmware: Add bindings for Tegra210 BPMP
  dt-bindings: tegra: Add Shield TV device tree binding documentation
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Documentation/devicetree/bindings/arm/tegra.yaml

@@ -87,9 +87,11 @@ properties:
           - const: nvidia,tegra124
       - items:
           - enum:
+              - nvidia,darcy
               - nvidia,p2371-0000
               - nvidia,p2371-2180
               - nvidia,p2571
+              - nvidia,p2894-0050-a08
           - const: nvidia,tegra210
       - items:
           - enum:

Documentation/devicetree/bindings/clock/nvidia,tegra124-dfll.txt

@@ -8,10 +8,11 @@ the fast CPU cluster. It consists of a free-running voltage controlled
 oscillator connected to the CPU voltage rail (VDD_CPU), and a closed loop
 control module that will automatically adjust the VDD_CPU voltage by
 communicating with an off-chip PMIC either via an I2C bus or via PWM signals.
-Currently only the I2C mode is supported by these bindings.
 
 Required properties:
-- compatible : should be "nvidia,tegra124-dfll"
+- compatible : should be one of:
+  - "nvidia,tegra124-dfll": for Tegra124
+  - "nvidia,tegra210-dfll": for Tegra210
 - reg : Defines the following set of registers, in the order listed:
         - registers for the DFLL control logic.
         - registers for the I2C output logic.
@@ -45,10 +46,31 @@ Required properties for the control loop parameters:
 Optional properties for the control loop parameters:
 - nvidia,cg-scale: Boolean value, see the field DFLL_PARAMS_CG_SCALE in the TRM.
 
+Optional properties for mode selection:
+- nvidia,pwm-to-pmic: Use PWM to control regulator rather then I2C.
+
 Required properties for I2C mode:
 - nvidia,i2c-fs-rate: I2C transfer rate, if using full speed mode.
 
-Example:
+Required properties for PWM mode:
+- nvidia,pwm-period-nanoseconds: period of PWM square wave in nanoseconds.
+- nvidia,pwm-tristate-microvolts: Regulator voltage in micro volts when PWM
+  control is disabled and the PWM output is tristated. Note that this voltage is
+  configured in hardware, typically via a resistor divider.
+- nvidia,pwm-min-microvolts: Regulator voltage in micro volts when PWM control
+  is enabled and PWM output is low. Hence, this is the minimum output voltage
+  that the regulator supports when PWM control is enabled.
+- nvidia,pwm-voltage-step-microvolts: Voltage increase in micro volts
+  corresponding to a 1/33th increase in duty cycle. Eg the voltage for 2/33th
+  duty cycle would be: nvidia,pwm-min-microvolts +
+  nvidia,pwm-voltage-step-microvolts * 2.
+- pinctrl-0: I/O pad configuration when PWM control is enabled.
+- pinctrl-1: I/O pad configuration when PWM control is disabled.
+- pinctrl-names: must include the following entries:
+  - dvfs_pwm_enable: I/O pad configuration when PWM control is enabled.
+  - dvfs_pwm_disable: I/O pad configuration when PWM control is disabled.
+
+Example for I2C:
 
 clock@70110000 {
         compatible = "nvidia,tegra124-dfll";
@@ -76,3 +98,58 @@ clock@70110000 {
 
         nvidia,i2c-fs-rate = <400000>;
 };
+
+Example for PWM:
+
+clock@70110000 {
+	compatible = "nvidia,tegra124-dfll";
+	reg = <0 0x70110000 0 0x100>, /* DFLL control */
+	      <0 0x70110000 0 0x100>, /* I2C output control */
+	      <0 0x70110100 0 0x100>, /* Integrated I2C controller */
+	      <0 0x70110200 0 0x100>; /* Look-up table RAM */
+	interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&tegra_car TEGRA210_CLK_DFLL_SOC>,
+	         <&tegra_car TEGRA210_CLK_DFLL_REF>,
+		 <&tegra_car TEGRA124_CLK_I2C5>;;
+	clock-names = "soc", "ref", "i2c";
+	resets = <&tegra_car TEGRA124_RST_DFLL_DVCO>;
+	reset-names = "dvco";
+	#clock-cells = <0>;
+	clock-output-names = "dfllCPU_out";
+
+	nvidia,sample-rate = <25000>;
+	nvidia,droop-ctrl = <0x00000f00>;
+	nvidia,force-mode = <1>;
+	nvidia,cf = <6>;
+	nvidia,ci = <0>;
+	nvidia,cg = <2>;
+
+	nvidia,pwm-min-microvolts = <708000>; /* 708mV */
+	nvidia,pwm-period-nanoseconds = <2500>; /* 2.5us */
+	nvidia,pwm-to-pmic;
+	nvidia,pwm-tristate-microvolts = <1000000>;
+	nvidia,pwm-voltage-step-microvolts = <19200>; /* 19.2mV */
+
+	pinctrl-names = "dvfs_pwm_enable", "dvfs_pwm_disable";
+	pinctrl-0 = <&dvfs_pwm_active_state>;
+	pinctrl-1 = <&dvfs_pwm_inactive_state>;
+};
+
+/* pinmux nodes added for completeness. Binding doc can be found in:
+ * Documentation/devicetree/bindings/pinctrl/nvidia,tegra210-pinmux.txt
+ */
+
+pinmux: pinmux@700008d4 {
+	dvfs_pwm_active_state: dvfs_pwm_active {
+		dvfs_pwm_pbb1 {
+			nvidia,pins = "dvfs_pwm_pbb1";
+			nvidia,tristate = <TEGRA_PIN_DISABLE>;
+		};
+	};
+	dvfs_pwm_inactive_state: dvfs_pwm_inactive {
+		dvfs_pwm_pbb1 {
+			nvidia,pins = "dvfs_pwm_pbb1";
+			nvidia,tristate = <TEGRA_PIN_ENABLE>;
+		};
+	};
+};

Documentation/devicetree/bindings/cpufreq/nvidia,tegra124-cpufreq.txt

@@ -9,11 +9,9 @@ Required properties:
   See ../clocks/clock-bindings.txt for details.
 - clock-names: Must include the following entries:
   - cpu_g: Clock mux for the fast CPU cluster.
-  - cpu_lp: Clock mux for the low-power CPU cluster.
   - pll_x: Fast PLL clocksource.
   - pll_p: Auxiliary PLL used during fast PLL rate changes.
   - dfll: Fast DFLL clocksource that also automatically scales CPU voltage.
-- vdd-cpu-supply: Regulator for CPU voltage
 
 Optional properties:
 - clock-latency: Specify the possible maximum transition latency for clock,
@@ -31,13 +29,11 @@ cpus {
 		reg = <0>;
 
 		clocks = <&tegra_car TEGRA124_CLK_CCLK_G>,
-			 <&tegra_car TEGRA124_CLK_CCLK_LP>,
 			 <&tegra_car TEGRA124_CLK_PLL_X>,
 			 <&tegra_car TEGRA124_CLK_PLL_P>,
 			 <&dfll>;
-		clock-names = "cpu_g", "cpu_lp", "pll_x", "pll_p", "dfll";
+		clock-names = "cpu_g", "pll_x", "pll_p", "dfll";
 		clock-latency = <300000>;
-		vdd-cpu-supply: <&vdd_cpu>;
 	};
 
 	<...>

Documentation/devicetree/bindings/firmware/nvidia,tegra186-bpmp.txt

@@ -8,7 +8,6 @@ which can create the interprocessor communication (IPC) between the CPU
 and BPMP.
 
 Required properties:
-- name : Should be bpmp
 - compatible
     Array of strings
     One of:

Documentation/devicetree/bindings/firmware/nvidia,tegra210-bpmp.txt

+NVIDIA Tegra210 Boot and Power Management Processor (BPMP)
+
+The Boot and Power Management Processor (BPMP) is a co-processor found
+in Tegra210 SoC. It is designed to handle the early stages of the boot
+process as well as to assisting in entering deep low power state
+(suspend to ram), and also offloading DRAM memory clock scaling on
+some platforms. The binding document defines the resources that would
+be used by the BPMP T210 firmware driver, which can create the
+interprocessor communication (IPC) between the CPU and BPMP.
+
+Required properties:
+- compatible
+    Array of strings
+    One of:
+    - "nvidia,tegra210-bpmp"
+- reg: physical base address and length for HW synchornization primitives
+       1) base address and length to Tegra 'atomics' hardware
+       2) base address and length to Tegra 'semaphore' hardware
+- interrupts: specifies the interrupt number for receiving messages ("rx")
+              and for triggering messages ("tx")
+
+Optional properties:
+- #clock-cells : Should be 1 for platforms where DRAM clock control is
+                 offloaded to bpmp.
+
+Example:
+
+bpmp@70016000 {
+	compatible = "nvidia,tegra210-bpmp";
+	reg = <0x0 0x70016000 0x0 0x2000
+	       0x0 0x60001000 0x0 0x1000>;
+	interrupts = <GIC_SPI 6 IRQ_TYPE_EDGE_RISING>,
+		     <GIC_SPI 4 IRQ_TYPE_EDGE_RISING>;
+	interrupt-names = "tx", "rx";
+};