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clk: sunxi-ng: Add A80 USB CCU

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Add support for the USB clock controls found on the A80.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This commit is contained in:
Chen-Yu Tsai 2017-01-28 20:22:35 +08:00 committed by Maxime Ripard
parent b8eb71dcdd
commit 439b65c4bb
6 changed files with 309 additions and 0 deletions
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24
Documentation/devicetree/bindings/clock/sun9i-usb.txt Normal file
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@ -0,0 +1,24 @@
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>;
};

1
drivers/clk/sunxi-ng/Makefile
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@ -26,3 +26,4 @@ obj-$(CONFIG_SUN8I_A33_CCU) += ccu-sun8i-a33.o
obj-$(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

144
drivers/clk/sunxi-ng/ccu-sun9i-a80-usb.c Normal file
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/*
* 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);

25
drivers/clk/sunxi-ng/ccu-sun9i-a80-usb.h Normal file
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@ -0,0 +1,25 @@
/*
* 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_ */

59
include/dt-bindings/clock/sun9i-a80-usb.h Normal file
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@ -0,0 +1,59 @@
/*
* 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_ */

56
include/dt-bindings/reset/sun9i-a80-usb.h Normal file
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@ -0,0 +1,56 @@
/*
* 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_RESET_SUN9I_A80_USB_H_
#define _DT_BINDINGS_RESET_SUN9I_A80_USB_H_
#define RST_USB0_HCI 0
#define RST_USB1_HCI 1
#define RST_USB2_HCI 2
#define RST_USB0_PHY 3
#define RST_USB1_HSIC 4
#define RST_USB1_PHY 5
#define RST_USB2_HSIC 6
#define RST_USB2_PHY 7
#endif /* _DT_BINDINGS_RESET_SUN9I_A80_USB_H_ */