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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
clk: sunxi-ng: Add A80 USB CCU
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>
authored by
Chen-Yu Tsai
and committed by
Maxime Ripard
439b65c4
b8eb71dc
+309
+24
Documentation/devicetree/bindings/clock/sun9i-usb.txt
+24
Documentation/devicetree/bindings/clock/sun9i-usb.txt
···
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Allwinner A80 USB Clock Control Binding
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---------------------------------------
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Required properties :
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- compatible: must contain one of the following compatibles:
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- "allwinner,sun9i-a80-usb-clocks"
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- reg: Must contain the registers base address and length
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- clocks: phandle to the clocks feeding the USB subsystem. Two are needed:
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- "bus": the bus clock for the whole USB subsystem
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- "hosc": the high frequency oscillator (usually at 24MHz)
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- clock-names: Must contain the clock names described just above
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- #clock-cells : must contain 1
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- #reset-cells : must contain 1
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Example:
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usb_clocks: clock@a08000 {
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compatible = "allwinner,sun9i-a80-usb-clks";
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reg = <0x00a08000 0x8>;
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clocks = <&ccu CLK_BUS_USB>, <&osc24M>;
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clock-names = "bus", "hosc";
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#clock-cells = <1>;
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#reset-cells = <1>;
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};
+1
drivers/clk/sunxi-ng/Makefile
+1
drivers/clk/sunxi-ng/Makefile
+144
drivers/clk/sunxi-ng/ccu-sun9i-a80-usb.c
+144
drivers/clk/sunxi-ng/ccu-sun9i-a80-usb.c
···
1
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/*
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* Copyright (c) 2016 Chen-Yu Tsai. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk.h>
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#include <linux/clk-provider.h>
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#include <linux/of_address.h>
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#include <linux/platform_device.h>
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+
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#include "ccu_common.h"
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#include "ccu_gate.h"
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#include "ccu_reset.h"
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#include "ccu-sun9i-a80-usb.h"
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+
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static SUNXI_CCU_GATE(bus_hci0_clk, "bus-hci0", "bus-usb", 0x0, BIT(1), 0);
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static SUNXI_CCU_GATE(usb_ohci0_clk, "usb-ohci0", "osc24M", 0x0, BIT(2), 0);
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static SUNXI_CCU_GATE(bus_hci1_clk, "bus-hci1", "bus-usb", 0x0, BIT(3), 0);
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static SUNXI_CCU_GATE(bus_hci2_clk, "bus-hci2", "bus-usb", 0x0, BIT(5), 0);
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static SUNXI_CCU_GATE(usb_ohci2_clk, "usb-ohci2", "osc24M", 0x0, BIT(6), 0);
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+
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static SUNXI_CCU_GATE(usb0_phy_clk, "usb0-phy", "osc24M", 0x4, BIT(1), 0);
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static SUNXI_CCU_GATE(usb1_hsic_clk, "usb1-hsic", "osc24M", 0x4, BIT(2), 0);
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static SUNXI_CCU_GATE(usb1_phy_clk, "usb1-phy", "osc24M", 0x4, BIT(3), 0);
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static SUNXI_CCU_GATE(usb2_hsic_clk, "usb2-hsic", "osc24M", 0x4, BIT(4), 0);
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static SUNXI_CCU_GATE(usb2_phy_clk, "usb2-phy", "osc24M", 0x4, BIT(5), 0);
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static SUNXI_CCU_GATE(usb_hsic_clk, "usb-hsic", "osc24M", 0x4, BIT(10), 0);
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static struct ccu_common *sun9i_a80_usb_clks[] = {
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&bus_hci0_clk.common,
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&usb_ohci0_clk.common,
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&bus_hci1_clk.common,
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&bus_hci2_clk.common,
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&usb_ohci2_clk.common,
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+
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&usb0_phy_clk.common,
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&usb1_hsic_clk.common,
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&usb1_phy_clk.common,
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&usb2_hsic_clk.common,
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&usb2_phy_clk.common,
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&usb_hsic_clk.common,
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};
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+
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static struct clk_hw_onecell_data sun9i_a80_usb_hw_clks = {
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.hws = {
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[CLK_BUS_HCI0] = &bus_hci0_clk.common.hw,
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[CLK_USB_OHCI0] = &usb_ohci0_clk.common.hw,
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[CLK_BUS_HCI1] = &bus_hci1_clk.common.hw,
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[CLK_BUS_HCI2] = &bus_hci2_clk.common.hw,
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[CLK_USB_OHCI2] = &usb_ohci2_clk.common.hw,
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+
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[CLK_USB0_PHY] = &usb0_phy_clk.common.hw,
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[CLK_USB1_HSIC] = &usb1_hsic_clk.common.hw,
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[CLK_USB1_PHY] = &usb1_phy_clk.common.hw,
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[CLK_USB2_HSIC] = &usb2_hsic_clk.common.hw,
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[CLK_USB2_PHY] = &usb2_phy_clk.common.hw,
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[CLK_USB_HSIC] = &usb_hsic_clk.common.hw,
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},
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.num = CLK_NUMBER,
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};
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static struct ccu_reset_map sun9i_a80_usb_resets[] = {
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[RST_USB0_HCI] = { 0x0, BIT(17) },
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[RST_USB1_HCI] = { 0x0, BIT(18) },
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[RST_USB2_HCI] = { 0x0, BIT(19) },
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[RST_USB0_PHY] = { 0x4, BIT(17) },
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[RST_USB1_HSIC] = { 0x4, BIT(18) },
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[RST_USB1_PHY] = { 0x4, BIT(19) },
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[RST_USB2_HSIC] = { 0x4, BIT(20) },
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[RST_USB2_PHY] = { 0x4, BIT(21) },
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};
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static const struct sunxi_ccu_desc sun9i_a80_usb_clk_desc = {
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.ccu_clks = sun9i_a80_usb_clks,
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.num_ccu_clks = ARRAY_SIZE(sun9i_a80_usb_clks),
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.hw_clks = &sun9i_a80_usb_hw_clks,
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.resets = sun9i_a80_usb_resets,
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.num_resets = ARRAY_SIZE(sun9i_a80_usb_resets),
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};
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static int sun9i_a80_usb_clk_probe(struct platform_device *pdev)
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{
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struct resource *res;
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struct clk *bus_clk;
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void __iomem *reg;
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int ret;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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reg = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(reg))
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return PTR_ERR(reg);
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bus_clk = devm_clk_get(&pdev->dev, "bus");
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if (IS_ERR(bus_clk)) {
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ret = PTR_ERR(bus_clk);
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if (ret != -EPROBE_DEFER)
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dev_err(&pdev->dev, "Couldn't get bus clk: %d\n", ret);
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return ret;
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}
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/* The bus clock needs to be enabled for us to access the registers */
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ret = clk_prepare_enable(bus_clk);
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if (ret) {
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dev_err(&pdev->dev, "Couldn't enable bus clk: %d\n", ret);
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return ret;
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}
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ret = sunxi_ccu_probe(pdev->dev.of_node, reg,
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&sun9i_a80_usb_clk_desc);
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if (ret)
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goto err_disable_clk;
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return 0;
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err_disable_clk:
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clk_disable_unprepare(bus_clk);
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return ret;
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}
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static const struct of_device_id sun9i_a80_usb_clk_ids[] = {
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{ .compatible = "allwinner,sun9i-a80-usb-clks" },
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{ }
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};
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static struct platform_driver sun9i_a80_usb_clk_driver = {
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.probe = sun9i_a80_usb_clk_probe,
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.driver = {
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.name = "sun9i-a80-usb-clks",
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.of_match_table = sun9i_a80_usb_clk_ids,
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},
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};
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builtin_platform_driver(sun9i_a80_usb_clk_driver);
+25
drivers/clk/sunxi-ng/ccu-sun9i-a80-usb.h
+25
drivers/clk/sunxi-ng/ccu-sun9i-a80-usb.h
···
1
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/*
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* Copyright 2016 Chen-Yu Tsai
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*
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* Chen-Yu Tsai <wens@csie.org>
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*
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* This program is free software; you can redistribute it and/or modify
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+
* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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+
*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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+
*/
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#ifndef _CCU_SUN9I_A80_USB_H_
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#define _CCU_SUN9I_A80_USB_H_
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#include <dt-bindings/clock/sun9i-a80-usb.h>
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#include <dt-bindings/reset/sun9i-a80-usb.h>
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#define CLK_NUMBER (CLK_USB_HSIC + 1)
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#endif /* _CCU_SUN9I_A80_USB_H_ */
+59
include/dt-bindings/clock/sun9i-a80-usb.h
+59
include/dt-bindings/clock/sun9i-a80-usb.h
···
1
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/*
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* Copyright (C) 2016 Chen-Yu Tsai <wens@csie.org>
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*
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* This file is dual-licensed: you can use it either under the terms
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* of the GPL or the X11 license, at your option. Note that this dual
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+
* licensing only applies to this file, and not this project as a
7
+
* whole.
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*
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* a) This file is free software; you can redistribute it and/or
10
+
* modify it under the terms of the GNU General Public License as
11
+
* published by the Free Software Foundation; either version 2 of the
12
+
* License, or (at your option) any later version.
13
+
*
14
+
* This file is distributed in the hope that it will be useful,
15
+
* but WITHOUT ANY WARRANTY; without even the implied warranty of
16
+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17
+
* GNU General Public License for more details.
18
+
*
19
+
* Or, alternatively,
20
+
*
21
+
* b) Permission is hereby granted, free of charge, to any person
22
+
* obtaining a copy of this software and associated documentation
23
+
* files (the "Software"), to deal in the Software without
24
+
* restriction, including without limitation the rights to use,
25
+
* copy, modify, merge, publish, distribute, sublicense, and/or
26
+
* sell copies of the Software, and to permit persons to whom the
27
+
* Software is furnished to do so, subject to the following
28
+
* conditions:
29
+
*
30
+
* The above copyright notice and this permission notice shall be
31
+
* included in all copies or substantial portions of the Software.
32
+
*
33
+
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
34
+
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
35
+
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
36
+
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
37
+
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
38
+
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
39
+
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
40
+
* OTHER DEALINGS IN THE SOFTWARE.
41
+
*/
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#ifndef _DT_BINDINGS_CLOCK_SUN9I_A80_USB_H_
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#define _DT_BINDINGS_CLOCK_SUN9I_A80_USB_H_
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+
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#define CLK_BUS_HCI0 0
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#define CLK_USB_OHCI0 1
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#define CLK_BUS_HCI1 2
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#define CLK_BUS_HCI2 3
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#define CLK_USB_OHCI2 4
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#define CLK_USB0_PHY 5
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#define CLK_USB1_HSIC 6
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#define CLK_USB1_PHY 7
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#define CLK_USB2_HSIC 8
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#define CLK_USB2_PHY 9
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#define CLK_USB_HSIC 10
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#endif /* _DT_BINDINGS_CLOCK_SUN9I_A80_USB_H_ */
+56
include/dt-bindings/reset/sun9i-a80-usb.h
+56
include/dt-bindings/reset/sun9i-a80-usb.h
···
1
+
/*
2
+
* Copyright (C) 2016 Chen-Yu Tsai <wens@csie.org>
3
+
*
4
+
* This file is dual-licensed: you can use it either under the terms
5
+
* of the GPL or the X11 license, at your option. Note that this dual
6
+
* licensing only applies to this file, and not this project as a
7
+
* whole.
8
+
*
9
+
* a) This file is free software; you can redistribute it and/or
10
+
* modify it under the terms of the GNU General Public License as
11
+
* published by the Free Software Foundation; either version 2 of the
12
+
* License, or (at your option) any later version.
13
+
*
14
+
* This file is distributed in the hope that it will be useful,
15
+
* but WITHOUT ANY WARRANTY; without even the implied warranty of
16
+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17
+
* GNU General Public License for more details.
18
+
*
19
+
* Or, alternatively,
20
+
*
21
+
* b) Permission is hereby granted, free of charge, to any person
22
+
* obtaining a copy of this software and associated documentation
23
+
* files (the "Software"), to deal in the Software without
24
+
* restriction, including without limitation the rights to use,
25
+
* copy, modify, merge, publish, distribute, sublicense, and/or
26
+
* sell copies of the Software, and to permit persons to whom the
27
+
* Software is furnished to do so, subject to the following
28
+
* conditions:
29
+
*
30
+
* The above copyright notice and this permission notice shall be
31
+
* included in all copies or substantial portions of the Software.
32
+
*
33
+
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
34
+
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
35
+
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
36
+
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
37
+
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
38
+
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
39
+
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
40
+
* OTHER DEALINGS IN THE SOFTWARE.
41
+
*/
42
+
43
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#ifndef _DT_BINDINGS_RESET_SUN9I_A80_USB_H_
44
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#define _DT_BINDINGS_RESET_SUN9I_A80_USB_H_
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+
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#define RST_USB0_HCI 0
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#define RST_USB1_HCI 1
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#define RST_USB2_HCI 2
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50
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#define RST_USB0_PHY 3
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#define RST_USB1_HSIC 4
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#define RST_USB1_PHY 5
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#define RST_USB2_HSIC 6
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#define RST_USB2_PHY 7
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#endif /* _DT_BINDINGS_RESET_SUN9I_A80_USB_H_ */