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Commit 140fd977 authored by Thierry Reding's avatar Thierry Reding
Browse files

pwm: tegra: Add device tree support 



Add auxdata to instantiate the PWFM controller from a device tree,
include the corresponding nodes in the dtsi files for Tegra 20 and
Tegra 30 and add binding documentation.

Acked-by: default avatarStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: default avatarThierry Reding <thierry.reding@avionic-design.de>
parent 0134b932

Documentation/devicetree/bindings/pwm/nvidia,tegra20-pwm.txt

0 → 100644
+18 −0
Original line number Original line Diff line number Diff line 
Tegra SoC PWFM controller



Required properties:

- compatible: should be one of:

  - "nvidia,tegra20-pwm"

  - "nvidia,tegra30-pwm"

- reg: physical base address and length of the controller's registers

- #pwm-cells: On Tegra the number of cells used to specify a PWM is 2. The

  first cell specifies the per-chip index of the PWM to use and the second

  cell is the duty cycle in nanoseconds.



Example:



	pwm: pwm@7000a000 {

		compatible = "nvidia,tegra20-pwm";

		reg = <0x7000a000 0x100>;

		#pwm-cells = <2>;

	};

arch/arm/boot/dts/tegra20.dtsi

+6 −0
Original line number Original line Diff line number Diff line
@@ -123,6 +123,12 @@ 
		status = "disable";

		status = "disable";

	};

	};





	pwm {

		compatible = "nvidia,tegra20-pwm";

		reg = <0x7000a000 0x100>;

		#pwm-cells = <2>;

	};



	i2c@7000c000 {

	i2c@7000c000 {

		compatible = "nvidia,tegra20-i2c";

		compatible = "nvidia,tegra20-i2c";

		reg = <0x7000c000 0x100>;

		reg = <0x7000c000 0x100>;

arch/arm/boot/dts/tegra30.dtsi

+6 −0
Original line number Original line Diff line number Diff line
@@ -117,6 +117,12 @@ 
		status = "disable";

		status = "disable";

	};

	};





	pwm {

		compatible = "nvidia,tegra30-pwm", "nvidia,tegra20-pwm";

		reg = <0x7000a000 0x100>;

		#pwm-cells = <2>;

	};



	i2c@7000c000 {

	i2c@7000c000 {

		compatible =  "nvidia,tegra30-i2c", "nvidia,tegra20-i2c";

		compatible =  "nvidia,tegra30-i2c", "nvidia,tegra20-i2c";

		reg = <0x7000c000 0x100>;

		reg = <0x7000c000 0x100>;

arch/arm/mach-tegra/board-dt-tegra20.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -64,6 +64,7 @@ struct of_dev_auxdata tegra20_auxdata_lookup[] __initdata = { 
		       &tegra_ehci2_pdata),

		       &tegra_ehci2_pdata),

	OF_DEV_AUXDATA("nvidia,tegra20-ehci", TEGRA_USB3_BASE, "tegra-ehci.2",

	OF_DEV_AUXDATA("nvidia,tegra20-ehci", TEGRA_USB3_BASE, "tegra-ehci.2",

		       &tegra_ehci3_pdata),

		       &tegra_ehci3_pdata),

	OF_DEV_AUXDATA("nvidia,tegra20-pwm", TEGRA_PWFM_BASE, "tegra-pwm", NULL),

	{}

	{}

};

};

arch/arm/mach-tegra/board-dt-tegra30.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -33,6 +33,8 @@ 
#include <asm/mach/arch.h>

#include <asm/mach/arch.h>

#include <asm/hardware/gic.h>

#include <asm/hardware/gic.h>





#include <mach/iomap.h>



#include "board.h"

#include "board.h"

#include "clock.h"

#include "clock.h"
@@ -52,6 +54,7 @@ struct of_dev_auxdata tegra30_auxdata_lookup[] __initdata = { 
	OF_DEV_AUXDATA("nvidia,tegra20-i2c", 0x7000C700, "tegra-i2c.3", NULL),

	OF_DEV_AUXDATA("nvidia,tegra20-i2c", 0x7000C700, "tegra-i2c.3", NULL),

	OF_DEV_AUXDATA("nvidia,tegra20-i2c", 0x7000D000, "tegra-i2c.4", NULL),

	OF_DEV_AUXDATA("nvidia,tegra20-i2c", 0x7000D000, "tegra-i2c.4", NULL),

	OF_DEV_AUXDATA("nvidia,tegra30-ahub", 0x70080000, "tegra30-ahub", NULL),

	OF_DEV_AUXDATA("nvidia,tegra30-ahub", 0x70080000, "tegra30-ahub", NULL),

	OF_DEV_AUXDATA("nvidia,tegra30-pwm", TEGRA_PWFM_BASE, "tegra-pwm", NULL),

	{}

	{}

};

};