/* * Copyright (c) 2017 Icenowy Zheng * * 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 #include #include #include #include #include #include "ccu_common.h" #include "ccu_div.h" #include "ccu_gate.h" #include "ccu_reset.h" #include "ccu-sun8i-de2.h" static SUNXI_CCU_GATE(bus_mixer0_clk, "bus-mixer0", "bus-de", 0x04, BIT(0), 0); static SUNXI_CCU_GATE(bus_mixer1_clk, "bus-mixer1", "bus-de", 0x04, BIT(1), 0); static SUNXI_CCU_GATE(bus_wb_clk, "bus-wb", "bus-de", 0x04, BIT(2), 0); static SUNXI_CCU_GATE(mixer0_clk, "mixer0", "mixer0-div", 0x00, BIT(0), CLK_SET_RATE_PARENT); static SUNXI_CCU_GATE(mixer1_clk, "mixer1", "mixer1-div", 0x00, BIT(1), CLK_SET_RATE_PARENT); static SUNXI_CCU_GATE(wb_clk, "wb", "wb-div", 0x00, BIT(2), CLK_SET_RATE_PARENT); static SUNXI_CCU_M(mixer0_div_clk, "mixer0-div", "de", 0x0c, 0, 4, CLK_SET_RATE_PARENT); static SUNXI_CCU_M(mixer1_div_clk, "mixer1-div", "de", 0x0c, 4, 4, CLK_SET_RATE_PARENT); static SUNXI_CCU_M(wb_div_clk, "wb-div", "de", 0x0c, 8, 4, CLK_SET_RATE_PARENT); static struct ccu_common *sun8i_a83t_de2_clks[] = { &mixer0_clk.common, &mixer1_clk.common, &wb_clk.common, &bus_mixer0_clk.common, &bus_mixer1_clk.common, &bus_wb_clk.common, &mixer0_div_clk.common, &mixer1_div_clk.common, &wb_div_clk.common, }; static struct ccu_common *sun8i_v3s_de2_clks[] = { &mixer0_clk.common, &wb_clk.common, &bus_mixer0_clk.common, &bus_wb_clk.common, &mixer0_div_clk.common, &wb_div_clk.common, }; static struct clk_hw_onecell_data sun8i_a83t_de2_hw_clks = { .hws = { [CLK_MIXER0] = &mixer0_clk.common.hw, [CLK_MIXER1] = &mixer1_clk.common.hw, [CLK_WB] = &wb_clk.common.hw, [CLK_BUS_MIXER0] = &bus_mixer0_clk.common.hw, [CLK_BUS_MIXER1] = &bus_mixer1_clk.common.hw, [CLK_BUS_WB] = &bus_wb_clk.common.hw, [CLK_MIXER0_DIV] = &mixer0_div_clk.common.hw, [CLK_MIXER1_DIV] = &mixer1_div_clk.common.hw, [CLK_WB_DIV] = &wb_div_clk.common.hw, }, .num = CLK_NUMBER, }; static struct clk_hw_onecell_data sun8i_v3s_de2_hw_clks = { .hws = { [CLK_MIXER0] = &mixer0_clk.common.hw, [CLK_WB] = &wb_clk.common.hw, [CLK_BUS_MIXER0] = &bus_mixer0_clk.common.hw, [CLK_BUS_WB] = &bus_wb_clk.common.hw, [CLK_MIXER0_DIV] = &mixer0_div_clk.common.hw, [CLK_WB_DIV] = &wb_div_clk.common.hw, }, .num = CLK_NUMBER, }; static struct ccu_reset_map sun8i_a83t_de2_resets[] = { [RST_MIXER0] = { 0x08, BIT(0) }, /* * For A83T, H3 and R40, mixer1 reset line is shared with wb, so * only RST_WB is exported here. * For V3s there's just no mixer1, so it also shares this struct. */ [RST_WB] = { 0x08, BIT(2) }, }; static struct ccu_reset_map sun50i_a64_de2_resets[] = { [RST_MIXER0] = { 0x08, BIT(0) }, [RST_MIXER1] = { 0x08, BIT(1) }, [RST_WB] = { 0x08, BIT(2) }, }; static const struct sunxi_ccu_desc sun8i_a83t_de2_clk_desc = { .ccu_clks = sun8i_a83t_de2_clks, .num_ccu_clks = ARRAY_SIZE(sun8i_a83t_de2_clks), .hw_clks = &sun8i_a83t_de2_hw_clks, .resets = sun8i_a83t_de2_resets, .num_resets = ARRAY_SIZE(sun8i_a83t_de2_resets), }; static const struct sunxi_ccu_desc sun50i_a64_de2_clk_desc = { .ccu_clks = sun8i_a83t_de2_clks, .num_ccu_clks = ARRAY_SIZE(sun8i_a83t_de2_clks), .hw_clks = &sun8i_a83t_de2_hw_clks, .resets = sun50i_a64_de2_resets, .num_resets = ARRAY_SIZE(sun50i_a64_de2_resets), }; static const struct sunxi_ccu_desc sun8i_v3s_de2_clk_desc = { .ccu_clks = sun8i_v3s_de2_clks, .num_ccu_clks = ARRAY_SIZE(sun8i_v3s_de2_clks), .hw_clks = &sun8i_v3s_de2_hw_clks, .resets = sun8i_a83t_de2_resets, .num_resets = ARRAY_SIZE(sun8i_a83t_de2_resets), }; static int sunxi_de2_clk_probe(struct platform_device *pdev) { struct resource *res; struct clk *bus_clk, *mod_clk; struct reset_control *rstc; void __iomem *reg; const struct sunxi_ccu_desc *ccu_desc; int ret; ccu_desc = of_device_get_match_data(&pdev->dev); if (!ccu_desc) return -EINVAL; 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; } mod_clk = devm_clk_get(&pdev->dev, "mod"); if (IS_ERR(mod_clk)) { ret = PTR_ERR(mod_clk); if (ret != -EPROBE_DEFER) dev_err(&pdev->dev, "Couldn't get mod 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 clocks need 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 = clk_prepare_enable(mod_clk); if (ret) { dev_err(&pdev->dev, "Couldn't enable mod clk: %d\n", ret); goto err_disable_bus_clk; } /* 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_mod_clk; } ret = sunxi_ccu_probe(pdev->dev.of_node, reg, ccu_desc); if (ret) goto err_assert_reset; return 0; err_assert_reset: reset_control_assert(rstc); err_disable_mod_clk: clk_disable_unprepare(mod_clk); err_disable_bus_clk: clk_disable_unprepare(bus_clk); return ret; } static const struct of_device_id sunxi_de2_clk_ids[] = { { .compatible = "allwinner,sun8i-a83t-de2-clk", .data = &sun8i_a83t_de2_clk_desc, }, { .compatible = "allwinner,sun8i-v3s-de2-clk", .data = &sun8i_v3s_de2_clk_desc, }, { .compatible = "allwinner,sun50i-h5-de2-clk", .data = &sun50i_a64_de2_clk_desc, }, /* * The Allwinner A64 SoC needs some bit to be poke in syscon to make * DE2 really working. * So there's currently no A64 compatible here. * H5 shares the same reset line with A64, so here H5 is using the * clock description of A64. */ { } }; static struct platform_driver sunxi_de2_clk_driver = { .probe = sunxi_de2_clk_probe, .driver = { .name = "sunxi-de2-clks", .of_match_table = sunxi_de2_clk_ids, }, }; builtin_platform_driver(sunxi_de2_clk_driver);