clk: sunxi-ng: Add A80 USB CCU

Allwinner A80 USB Clock Control Binding

---------------------------------------

Required properties :

- compatible: must contain one of the following compatibles:

		- "allwinner,sun9i-a80-usb-clocks"

- reg: Must contain the registers base address and length

- clocks: phandle to the clocks feeding the USB subsystem. Two are needed:

  - "bus": the bus clock for the whole USB subsystem

  - "hosc": the high frequency oscillator (usually at 24MHz)

- clock-names: Must contain the clock names described just above

- #clock-cells : must contain 1

- #reset-cells : must contain 1

Example:

usb_clocks: clock@a08000 {

	compatible = "allwinner,sun9i-a80-usb-clks";

	reg = <0x00a08000 0x8>;

	clocks = <&ccu CLK_BUS_USB>, <&osc24M>;

	clock-names = "bus", "hosc";

	#clock-cells = <1>;

	#reset-cells = <1>;

};

obj-$(CONFIG_SUN8I_H3_CCU)	+= ccu-sun8i-h3.o

obj-$(CONFIG_SUN8I_V3S_CCU)	+= ccu-sun8i-v3s.o

obj-$(CONFIG_SUN9I_A80_CCU)	+= ccu-sun9i-a80.o

obj-$(CONFIG_SUN9I_A80_CCU)	+= ccu-sun9i-a80-usb.o

/*

 * Copyright (c) 2016 Chen-Yu Tsai. All rights reserved.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

#include <linux/clk.h>

#include <linux/clk-provider.h>

#include <linux/of_address.h>

#include <linux/platform_device.h>

#include "ccu_common.h"

#include "ccu_gate.h"

#include "ccu_reset.h"

#include "ccu-sun9i-a80-usb.h"

static SUNXI_CCU_GATE(bus_hci0_clk, "bus-hci0", "bus-usb", 0x0, BIT(1), 0);

static SUNXI_CCU_GATE(usb_ohci0_clk, "usb-ohci0", "osc24M", 0x0, BIT(2), 0);

static SUNXI_CCU_GATE(bus_hci1_clk, "bus-hci1", "bus-usb", 0x0, BIT(3), 0);

static SUNXI_CCU_GATE(bus_hci2_clk, "bus-hci2", "bus-usb", 0x0, BIT(5), 0);

static SUNXI_CCU_GATE(usb_ohci2_clk, "usb-ohci2", "osc24M", 0x0, BIT(6), 0);

static SUNXI_CCU_GATE(usb0_phy_clk, "usb0-phy", "osc24M", 0x4, BIT(1), 0);

static SUNXI_CCU_GATE(usb1_hsic_clk, "usb1-hsic", "osc24M", 0x4, BIT(2), 0);

static SUNXI_CCU_GATE(usb1_phy_clk, "usb1-phy", "osc24M", 0x4, BIT(3), 0);

static SUNXI_CCU_GATE(usb2_hsic_clk, "usb2-hsic", "osc24M", 0x4, BIT(4), 0);

static SUNXI_CCU_GATE(usb2_phy_clk, "usb2-phy", "osc24M", 0x4, BIT(5), 0);

static SUNXI_CCU_GATE(usb_hsic_clk, "usb-hsic", "osc24M", 0x4, BIT(10), 0);

static struct ccu_common *sun9i_a80_usb_clks[] = {

	&bus_hci0_clk.common,

	&usb_ohci0_clk.common,

	&bus_hci1_clk.common,

	&bus_hci2_clk.common,

	&usb_ohci2_clk.common,

	&usb0_phy_clk.common,

	&usb1_hsic_clk.common,

	&usb1_phy_clk.common,

	&usb2_hsic_clk.common,

	&usb2_phy_clk.common,

	&usb_hsic_clk.common,

};

static struct clk_hw_onecell_data sun9i_a80_usb_hw_clks = {

	.hws	= {

		[CLK_BUS_HCI0]	= &bus_hci0_clk.common.hw,

		[CLK_USB_OHCI0]	= &usb_ohci0_clk.common.hw,

		[CLK_BUS_HCI1]	= &bus_hci1_clk.common.hw,

		[CLK_BUS_HCI2]	= &bus_hci2_clk.common.hw,

		[CLK_USB_OHCI2]	= &usb_ohci2_clk.common.hw,

		[CLK_USB0_PHY]	= &usb0_phy_clk.common.hw,

		[CLK_USB1_HSIC]	= &usb1_hsic_clk.common.hw,

		[CLK_USB1_PHY]	= &usb1_phy_clk.common.hw,

		[CLK_USB2_HSIC]	= &usb2_hsic_clk.common.hw,

		[CLK_USB2_PHY]	= &usb2_phy_clk.common.hw,

		[CLK_USB_HSIC]	= &usb_hsic_clk.common.hw,

	},

	.num	= CLK_NUMBER,

};

static struct ccu_reset_map sun9i_a80_usb_resets[] = {

	[RST_USB0_HCI]		= { 0x0, BIT(17) },

	[RST_USB1_HCI]		= { 0x0, BIT(18) },

	[RST_USB2_HCI]		= { 0x0, BIT(19) },

	[RST_USB0_PHY]		= { 0x4, BIT(17) },

	[RST_USB1_HSIC]		= { 0x4, BIT(18) },

	[RST_USB1_PHY]		= { 0x4, BIT(19) },

	[RST_USB2_HSIC]		= { 0x4, BIT(20) },

	[RST_USB2_PHY]		= { 0x4, BIT(21) },

};

static const struct sunxi_ccu_desc sun9i_a80_usb_clk_desc = {

	.ccu_clks	= sun9i_a80_usb_clks,

	.num_ccu_clks	= ARRAY_SIZE(sun9i_a80_usb_clks),

	.hw_clks	= &sun9i_a80_usb_hw_clks,

	.resets		= sun9i_a80_usb_resets,

	.num_resets	= ARRAY_SIZE(sun9i_a80_usb_resets),

};

static int sun9i_a80_usb_clk_probe(struct platform_device *pdev)

{

	struct resource *res;

	struct clk *bus_clk;

	void __iomem *reg;

	int ret;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	reg = devm_ioremap_resource(&pdev->dev, res);

	if (IS_ERR(reg))

		return PTR_ERR(reg);

	bus_clk = devm_clk_get(&pdev->dev, "bus");

	if (IS_ERR(bus_clk)) {

		ret = PTR_ERR(bus_clk);

		if (ret != -EPROBE_DEFER)

			dev_err(&pdev->dev, "Couldn't get bus clk: %d\n", ret);

		return ret;

	}

	/* The bus clock needs to be enabled for us to access the registers */

	ret = clk_prepare_enable(bus_clk);

	if (ret) {

		dev_err(&pdev->dev, "Couldn't enable bus clk: %d\n", ret);

		return ret;

	}

	ret = sunxi_ccu_probe(pdev->dev.of_node, reg,

			      &sun9i_a80_usb_clk_desc);

	if (ret)

		goto err_disable_clk;

	return 0;

err_disable_clk:

	clk_disable_unprepare(bus_clk);

	return ret;

}

static const struct of_device_id sun9i_a80_usb_clk_ids[] = {

	{ .compatible = "allwinner,sun9i-a80-usb-clks" },

	{ }

};

static struct platform_driver sun9i_a80_usb_clk_driver = {

	.probe	= sun9i_a80_usb_clk_probe,

	.driver	= {

		.name	= "sun9i-a80-usb-clks",

		.of_match_table	= sun9i_a80_usb_clk_ids,

	},

};

builtin_platform_driver(sun9i_a80_usb_clk_driver);

/*

 * Copyright 2016 Chen-Yu Tsai

 *

 * Chen-Yu Tsai <wens@csie.org>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

#ifndef _CCU_SUN9I_A80_USB_H_

#define _CCU_SUN9I_A80_USB_H_

#include <dt-bindings/clock/sun9i-a80-usb.h>

#include <dt-bindings/reset/sun9i-a80-usb.h>

#define CLK_NUMBER	(CLK_USB_HSIC + 1)

#endif /* _CCU_SUN9I_A80_USB_H_ */

/*

 * Copyright (C) 2016 Chen-Yu Tsai <wens@csie.org>

 *

 * This file is dual-licensed: you can use it either under the terms

 * of the GPL or the X11 license, at your option. Note that this dual

 * licensing only applies to this file, and not this project as a

 * whole.

 *

 *  a) This file is free software; you can redistribute it and/or

 *     modify it under the terms of the GNU General Public License as

 *     published by the Free Software Foundation; either version 2 of the

 *     License, or (at your option) any later version.

 *

 *     This file is distributed in the hope that it will be useful,

 *     but WITHOUT ANY WARRANTY; without even the implied warranty of

 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *     GNU General Public License for more details.

 *

 * Or, alternatively,

 *

 *  b) Permission is hereby granted, free of charge, to any person

 *     obtaining a copy of this software and associated documentation

 *     files (the "Software"), to deal in the Software without

 *     restriction, including without limitation the rights to use,

 *     copy, modify, merge, publish, distribute, sublicense, and/or

 *     sell copies of the Software, and to permit persons to whom the

 *     Software is furnished to do so, subject to the following

 *     conditions:

 *

 *     The above copyright notice and this permission notice shall be

 *     included in all copies or substantial portions of the Software.

 *

 *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES

 *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT

 *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,

 *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

 *     OTHER DEALINGS IN THE SOFTWARE.

 */

#ifndef _DT_BINDINGS_CLOCK_SUN9I_A80_USB_H_

#define _DT_BINDINGS_CLOCK_SUN9I_A80_USB_H_

#define CLK_BUS_HCI0	0

#define CLK_USB_OHCI0	1

#define CLK_BUS_HCI1	2

#define CLK_BUS_HCI2	3

#define CLK_USB_OHCI2	4

#define CLK_USB0_PHY	5

#define CLK_USB1_HSIC	6

#define CLK_USB1_PHY	7

#define CLK_USB2_HSIC	8

#define CLK_USB2_PHY	9

#define CLK_USB_HSIC	10

#endif /* _DT_BINDINGS_CLOCK_SUN9I_A80_USB_H_ */