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439b65c4bb
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>
145 lines
4.3 KiB
C
145 lines
4.3 KiB
C
/*
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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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#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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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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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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&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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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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[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);
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