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Commit 92f06c38 authored by Olof Johansson's avatar Olof Johansson
Browse files

Merge tag 'sunxi-drivers-for-4.19' of... 

Merge tag 'sunxi-drivers-for-4.19' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux into next/drivers

Allwinner drivers changes for 4.19

There's been work for this release cycles in both the SRAM controller
driver in order to support more SoCs, as part of our VPU work, but also to
enable the EMAC on the A64 (that needs to poke at registers within the same
register space).

Some work has been needed too to represent the bus to the display engine
controllers that all need an SRAM to be mapped to the CPU to be able to
access those controllers' registers.

* tag 'sunxi-drivers-for-4.19' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux

:
  soc: sunxi: Add the A13, A23 and H3 system control compatibles
  drivers: soc: sunxi: Add support for the C1 SRAM region
  dt-bindings: sram: sunxi: Populate valid sections compatibles
  dt-bindings: sram: sunxi: Add A13, A20, A23 and H3 dedicated bindings
  soc: sunxi: sram: Add dt match for the A10 system-control compatible
  dt-bindings: sram: sunxi: Introduce new A10 binding for system-control
  bus: add bus driver for accessing Allwinner A64 DE2
  dt-bindings: add binding for the Allwinner A64 DE2 bus
  soc: sunxi: sram: Add updated compatible string for A64 system control
  dt-bindings: sram: Rename A64 SRAM controller compatible
  soc: sunxi: export a regmap for EMAC clock reg on A64

Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
parents d7e83230 7377330a

Documentation/devicetree/bindings/bus/sun50i-de2-bus.txt

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+37 −0
Original line number Diff line number Diff line 
Device tree bindings for Allwinner A64 DE2 bus



The Allwinner A64 DE2 is on a special bus, which needs a SRAM region (SRAM C)

to be claimed for enabling the access.



Required properties:



 - compatible:		Should contain "allwinner,sun50i-a64-de2"

 - reg:			A resource specifier for the register space

 - #address-cells:	Must be set to 1

 - #size-cells:		Must be set to 1

 - ranges:		Must be set up to map the address space inside the

			DE2, for the sub-blocks of DE2.

 - allwinner,sram:	the SRAM that needs to be claimed



Example:



	de2@1000000 {

		compatible = "allwinner,sun50i-a64-de2";

		reg = <0x1000000 0x400000>;

		allwinner,sram = <&de2_sram 1>;

		#address-cells = <1>;

		#size-cells = <1>;

		ranges = <0 0x1000000 0x400000>;



		display_clocks: clock@0 {

			compatible = "allwinner,sun50i-a64-de2-clk";

			reg = <0x0 0x100000>;

			clocks = <&ccu CLK_DE>,

				 <&ccu CLK_BUS_DE>;

			clock-names = "mod",

				      "bus";

			resets = <&ccu RST_BUS_DE>;

			#clock-cells = <1>;

			#reset-cells = <1>;

		};

	};

Documentation/devicetree/bindings/sram/sunxi-sram.txt

+27 −4
Original line number Diff line number Diff line
@@ -10,8 +10,14 @@ Controller Node 


Required properties:

- compatible : should be:

    - "allwinner,sun4i-a10-sram-controller"

    - "allwinner,sun50i-a64-sram-controller"

    - "allwinner,sun4i-a10-sram-controller" (deprecated)

    - "allwinner,sun4i-a10-system-control"

    - "allwinner,sun5i-a13-system-control"

    - "allwinner,sun7i-a20-system-control", "allwinner,sun4i-a10-system-control"

    - "allwinner,sun8i-a23-system-control"

    - "allwinner,sun8i-h3-system-control"

    - "allwinner,sun50i-a64-sram-controller" (deprecated)

    - "allwinner,sun50i-a64-system-control"

- reg : sram controller register offset + length



SRAM nodes
@@ -26,8 +32,25 @@ once again the representation described in the mmio-sram binding. 


The valid sections compatible for A10 are:

    - allwinner,sun4i-a10-sram-a3-a4

    - allwinner,sun4i-a10-sram-c1

    - allwinner,sun4i-a10-sram-d



The valid sections compatible for A13 are:

    - allwinner,sun5i-a13-sram-a3-a4, allwinner,sun4i-a10-sram-a3-a4

    - allwinner,sun5i-a13-sram-c1, allwinner,sun4i-a10-sram-c1

    - allwinner,sun5i-a13-sram-d, allwinner,sun4i-a10-sram-d



The valid sections compatible for A20 are:

    - allwinner,sun7i-a20-sram-a3-a4, allwinner,sun4i-a10-sram-a3-a4

    - allwinner,sun7i-a20-sram-c1, allwinner,sun4i-a10-sram-c1

    - allwinner,sun7i-a20-sram-d, allwinner,sun4i-a10-sram-d



The valid sections compatible for A23/A33 are:

    - allwinner,sun8i-a23-sram-c1, allwinner,sun4i-a10-sram-c1



The valid sections compatible for H3 are:

    - allwinner,sun8i-h3-sram-c1, allwinner,sun4i-a10-sram-c1



The valid sections compatible for A64 are:

    - allwinner,sun50i-a64-sram-c
@@ -47,8 +70,8 @@ This valid values for this argument are: 


Example

-------

sram-controller@1c00000 {

	compatible = "allwinner,sun4i-a10-sram-controller";

system-control@1c00000 {

	compatible = "allwinner,sun4i-a10-system-control";

	reg = <0x01c00000 0x30>;

	#address-cells = <1>;

	#size-cells = <1>;

drivers/bus/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -103,6 +103,16 @@ config SIMPLE_PM_BUS 
	  Controller (BSC, sometimes called "LBSC within Bus Bridge", or

	  "External Bus Interface") as found on several Renesas ARM SoCs.



config SUN50I_DE2_BUS

	bool "Allwinner A64 DE2 Bus Driver"

	  default ARM64

	  depends on ARCH_SUNXI

	  select SUNXI_SRAM

	  help

	  Say y here to enable support for Allwinner A64 DE2 bus driver. It's

	  mostly transparent, but a SRAM region needs to be claimed in the SRAM

	  controller to make the all blocks in the DE2 part accessible.



config SUNXI_RSB

	tristate "Allwinner sunXi Reduced Serial Bus Driver"

	  default MACH_SUN8I || MACH_SUN9I || ARM64

drivers/bus/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ obj-$(CONFIG_OMAP_INTERCONNECT) += omap_l3_smx.o omap_l3_noc.o 


obj-$(CONFIG_OMAP_OCP2SCP)	+= omap-ocp2scp.o

obj-$(CONFIG_QCOM_EBI2)		+= qcom-ebi2.o

obj-$(CONFIG_SUN50I_DE2_BUS)	+= sun50i-de2.o

obj-$(CONFIG_SUNXI_RSB)		+= sunxi-rsb.o

obj-$(CONFIG_SIMPLE_PM_BUS)	+= simple-pm-bus.o

obj-$(CONFIG_TEGRA_ACONNECT)	+= tegra-aconnect.o

drivers/bus/sun50i-de2.c

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+48 −0
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// SPDX-License-Identifier: GPL-2.0

/*

 * Allwinner A64 Display Engine 2.0 Bus Driver

 *

 * Copyright (C) 2018 Icenowy Zheng <icenowy@aosc.io>

 */



#include <linux/of_platform.h>

#include <linux/platform_device.h>

#include <linux/soc/sunxi/sunxi_sram.h>



static int sun50i_de2_bus_probe(struct platform_device *pdev)

{

	struct device_node *np = pdev->dev.of_node;

	int ret;



	ret = sunxi_sram_claim(&pdev->dev);

	if (ret) {

		dev_err(&pdev->dev, "Error couldn't map SRAM to device\n");

		return ret;

	}



	of_platform_populate(np, NULL, NULL, &pdev->dev);



	return 0;

}



static int sun50i_de2_bus_remove(struct platform_device *pdev)

{

	sunxi_sram_release(&pdev->dev);

	return 0;

}



static const struct of_device_id sun50i_de2_bus_of_match[] = {

	{ .compatible = "allwinner,sun50i-a64-de2", },

	{ /* sentinel */ }

};



static struct platform_driver sun50i_de2_bus_driver = {

	.probe = sun50i_de2_bus_probe,

	.remove = sun50i_de2_bus_remove,

	.driver = {

		.name = "sun50i-de2-bus",

		.of_match_table = sun50i_de2_bus_of_match,

	},

};



builtin_platform_driver(sun50i_de2_bus_driver);