diff options
Diffstat (limited to 'drivers/clk/sunxi-ng/ccu-sun9i-a80-usb.c')
| -rw-r--r-- | drivers/clk/sunxi-ng/ccu-sun9i-a80-usb.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/drivers/clk/sunxi-ng/ccu-sun9i-a80-usb.c b/drivers/clk/sunxi-ng/ccu-sun9i-a80-usb.c new file mode 100644 index 000000000000..1d76f24f7df3 --- /dev/null +++ b/drivers/clk/sunxi-ng/ccu-sun9i-a80-usb.c @@ -0,0 +1,144 @@ +/* + * 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); |