/* * 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 <linux/reset.h> #include "ccu_common.h" #include "ccu_div.h" #include "ccu_gate.h" #include "ccu_reset.h" #include "ccu-sun9i-a80-de.h" static SUNXI_CCU_GATE(fe0_clk, "fe0", "fe0-div", 0x00, BIT(0), 0); static SUNXI_CCU_GATE(fe1_clk, "fe1", "fe1-div", 0x00, BIT(1), 0); static SUNXI_CCU_GATE(fe2_clk, "fe2", "fe2-div", 0x00, BIT(2), 0); static SUNXI_CCU_GATE(iep_deu0_clk, "iep-deu0", "de", 0x00, BIT(4), 0); static SUNXI_CCU_GATE(iep_deu1_clk, "iep-deu1", "de", 0x00, BIT(5), 0); static SUNXI_CCU_GATE(be0_clk, "be0", "be0-div", 0x00, BIT(8), 0); static SUNXI_CCU_GATE(be1_clk, "be1", "be1-div", 0x00, BIT(9), 0); static SUNXI_CCU_GATE(be2_clk, "be2", "be2-div", 0x00, BIT(10), 0); static SUNXI_CCU_GATE(iep_drc0_clk, "iep-drc0", "de", 0x00, BIT(12), 0); static SUNXI_CCU_GATE(iep_drc1_clk, "iep-drc1", "de", 0x00, BIT(13), 0); static SUNXI_CCU_GATE(merge_clk, "merge", "de", 0x00, BIT(20), 0); static SUNXI_CCU_GATE(dram_fe0_clk, "dram-fe0", "sdram", 0x04, BIT(0), 0); static SUNXI_CCU_GATE(dram_fe1_clk, "dram-fe1", "sdram", 0x04, BIT(1), 0); static SUNXI_CCU_GATE(dram_fe2_clk, "dram-fe2", "sdram", 0x04, BIT(2), 0); static SUNXI_CCU_GATE(dram_deu0_clk, "dram-deu0", "sdram", 0x04, BIT(4), 0); static SUNXI_CCU_GATE(dram_deu1_clk, "dram-deu1", "sdram", 0x04, BIT(5), 0); static SUNXI_CCU_GATE(dram_be0_clk, "dram-be0", "sdram", 0x04, BIT(8), 0); static SUNXI_CCU_GATE(dram_be1_clk, "dram-be1", "sdram", 0x04, BIT(9), 0); static SUNXI_CCU_GATE(dram_be2_clk, "dram-be2", "sdram", 0x04, BIT(10), 0); static SUNXI_CCU_GATE(dram_drc0_clk, "dram-drc0", "sdram", 0x04, BIT(12), 0); static SUNXI_CCU_GATE(dram_drc1_clk, "dram-drc1", "sdram", 0x04, BIT(13), 0); static SUNXI_CCU_GATE(bus_fe0_clk, "bus-fe0", "bus-de", 0x08, BIT(0), 0); static SUNXI_CCU_GATE(bus_fe1_clk, "bus-fe1", "bus-de", 0x08, BIT(1), 0); static SUNXI_CCU_GATE(bus_fe2_clk, "bus-fe2", "bus-de", 0x08, BIT(2), 0); static SUNXI_CCU_GATE(bus_deu0_clk, "bus-deu0", "bus-de", 0x08, BIT(4), 0); static SUNXI_CCU_GATE(bus_deu1_clk, "bus-deu1", "bus-de", 0x08, BIT(5), 0); static SUNXI_CCU_GATE(bus_be0_clk, "bus-be0", "bus-de", 0x08, BIT(8), 0); static SUNXI_CCU_GATE(bus_be1_clk, "bus-be1", "bus-de", 0x08, BIT(9), 0); static SUNXI_CCU_GATE(bus_be2_clk, "bus-be2", "bus-de", 0x08, BIT(10), 0); static SUNXI_CCU_GATE(bus_drc0_clk, "bus-drc0", "bus-de", 0x08, BIT(12), 0); static SUNXI_CCU_GATE(bus_drc1_clk, "bus-drc1", "bus-de", 0x08, BIT(13), 0); static SUNXI_CCU_M(fe0_div_clk, "fe0-div", "de", 0x20, 0, 4, 0); static SUNXI_CCU_M(fe1_div_clk, "fe1-div", "de", 0x20, 4, 4, 0); static SUNXI_CCU_M(fe2_div_clk, "fe2-div", "de", 0x20, 8, 4, 0); static SUNXI_CCU_M(be0_div_clk, "be0-div", "de", 0x20, 16, 4, 0); static SUNXI_CCU_M(be1_div_clk, "be1-div", "de", 0x20, 20, 4, 0); static SUNXI_CCU_M(be2_div_clk, "be2-div", "de", 0x20, 24, 4, 0); static struct ccu_common *sun9i_a80_de_clks[] = { &fe0_clk.common, &fe1_clk.common, &fe2_clk.common, &iep_deu0_clk.common, &iep_deu1_clk.common, &be0_clk.common, &be1_clk.common, &be2_clk.common, &iep_drc0_clk.common, &iep_drc1_clk.common, &merge_clk.common, &dram_fe0_clk.common, &dram_fe1_clk.common, &dram_fe2_clk.common, &dram_deu0_clk.common, &dram_deu1_clk.common, &dram_be0_clk.common, &dram_be1_clk.common, &dram_be2_clk.common, &dram_drc0_clk.common, &dram_drc1_clk.common, &bus_fe0_clk.common, &bus_fe1_clk.common, &bus_fe2_clk.common, &bus_deu0_clk.common, &bus_deu1_clk.common, &bus_be0_clk.common, &bus_be1_clk.common, &bus_be2_clk.common, &bus_drc0_clk.common, &bus_drc1_clk.common, &fe0_div_clk.common, &fe1_div_clk.common, &fe2_div_clk.common, &be0_div_clk.common, &be1_div_clk.common, &be2_div_clk.common, }; static struct clk_hw_onecell_data sun9i_a80_de_hw_clks = { .hws = { [CLK_FE0] = &fe0_clk.common.hw, [CLK_FE1] = &fe1_clk.common.hw, [CLK_FE2] = &fe2_clk.common.hw, [CLK_IEP_DEU0] = &iep_deu0_clk.common.hw, [CLK_IEP_DEU1] = &iep_deu1_clk.common.hw, [CLK_BE0] = &be0_clk.common.hw, [CLK_BE1] = &be1_clk.common.hw, [CLK_BE2] = &be2_clk.common.hw, [CLK_IEP_DRC0] = &iep_drc0_clk.common.hw, [CLK_IEP_DRC1] = &iep_drc1_clk.common.hw, [CLK_MERGE] = &merge_clk.common.hw, [CLK_DRAM_FE0] = &dram_fe0_clk.common.hw, [CLK_DRAM_FE1] = &dram_fe1_clk.common.hw, [CLK_DRAM_FE2] = &dram_fe2_clk.common.hw, [CLK_DRAM_DEU0] = &dram_deu0_clk.common.hw, [CLK_DRAM_DEU1] = &dram_deu1_clk.common.hw, [CLK_DRAM_BE0] = &dram_be0_clk.common.hw, [CLK_DRAM_BE1] = &dram_be1_clk.common.hw, [CLK_DRAM_BE2] = &dram_be2_clk.common.hw, [CLK_DRAM_DRC0] = &dram_drc0_clk.common.hw, [CLK_DRAM_DRC1] = &dram_drc1_clk.common.hw, [CLK_BUS_FE0] = &bus_fe0_clk.common.hw, [CLK_BUS_FE1] = &bus_fe1_clk.common.hw, [CLK_BUS_FE2] = &bus_fe2_clk.common.hw, [CLK_BUS_DEU0] = &bus_deu0_clk.common.hw, [CLK_BUS_DEU1] = &bus_deu1_clk.common.hw, [CLK_BUS_BE0] = &bus_be0_clk.common.hw, [CLK_BUS_BE1] = &bus_be1_clk.common.hw, [CLK_BUS_BE2] = &bus_be2_clk.common.hw, [CLK_BUS_DRC0] = &bus_drc0_clk.common.hw, [CLK_BUS_DRC1] = &bus_drc1_clk.common.hw, [CLK_FE0_DIV] = &fe0_div_clk.common.hw, [CLK_FE1_DIV] = &fe1_div_clk.common.hw, [CLK_FE2_DIV] = &fe2_div_clk.common.hw, [CLK_BE0_DIV] = &be0_div_clk.common.hw, [CLK_BE1_DIV] = &be1_div_clk.common.hw, [CLK_BE2_DIV] = &be2_div_clk.common.hw, }, .num = CLK_NUMBER, }; static struct ccu_reset_map sun9i_a80_de_resets[] = { [RST_FE0] = { 0x0c, BIT(0) }, [RST_FE1] = { 0x0c, BIT(1) }, [RST_FE2] = { 0x0c, BIT(2) }, [RST_DEU0] = { 0x0c, BIT(4) }, [RST_DEU1] = { 0x0c, BIT(5) }, [RST_BE0] = { 0x0c, BIT(8) }, [RST_BE1] = { 0x0c, BIT(9) }, [RST_BE2] = { 0x0c, BIT(10) }, [RST_DRC0] = { 0x0c, BIT(12) }, [RST_DRC1] = { 0x0c, BIT(13) }, [RST_MERGE] = { 0x0c, BIT(20) }, }; static const struct sunxi_ccu_desc sun9i_a80_de_clk_desc = { .ccu_clks = sun9i_a80_de_clks, .num_ccu_clks = ARRAY_SIZE(sun9i_a80_de_clks), .hw_clks = &sun9i_a80_de_hw_clks, .resets = sun9i_a80_de_resets, .num_resets = ARRAY_SIZE(sun9i_a80_de_resets), }; static int sun9i_a80_de_clk_probe(struct platform_device *pdev) { struct resource *res; struct clk *bus_clk; struct reset_control *rstc; 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; } rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL); if (IS_ERR(rstc)) { ret = PTR_ERR(rstc); if (ret != -EPROBE_DEFER) dev_err(&pdev->dev, "Couldn't get reset control: %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; } /* The reset control needs to be asserted for the controls to work */ ret = reset_control_deassert(rstc); if (ret) { dev_err(&pdev->dev, "Couldn't deassert reset control: %d\n", ret); goto err_disable_clk; } ret = sunxi_ccu_probe(pdev->dev.of_node, reg, &sun9i_a80_de_clk_desc); if (ret) goto err_assert_reset; return 0; err_assert_reset: reset_control_assert(rstc); err_disable_clk: clk_disable_unprepare(bus_clk); return ret; } static const struct of_device_id sun9i_a80_de_clk_ids[] = { { .compatible = "allwinner,sun9i-a80-de-clks" }, { } }; static struct platform_driver sun9i_a80_de_clk_driver = { .probe = sun9i_a80_de_clk_probe, .driver = { .name = "sun9i-a80-de-clks", .of_match_table = sun9i_a80_de_clk_ids, }, }; builtin_platform_driver(sun9i_a80_de_clk_driver);