diff options
Diffstat (limited to 'drivers/clk/mediatek/clk-mt8173-infracfg.c')
| -rw-r--r-- | drivers/clk/mediatek/clk-mt8173-infracfg.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/drivers/clk/mediatek/clk-mt8173-infracfg.c b/drivers/clk/mediatek/clk-mt8173-infracfg.c new file mode 100644 index 0000000000..2f2f074e23 --- /dev/null +++ b/drivers/clk/mediatek/clk-mt8173-infracfg.c @@ -0,0 +1,154 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2014 MediaTek Inc. + * Copyright (c) 2022 Collabora Ltd. + * Author: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> + */ + +#include <dt-bindings/clock/mt8173-clk.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include "clk-cpumux.h" +#include "clk-gate.h" +#include "clk-mtk.h" +#include "reset.h" + +#define GATE_ICG(_id, _name, _parent, _shift) \ + GATE_MTK(_id, _name, _parent, &infra_cg_regs, \ + _shift, &mtk_clk_gate_ops_setclr) + +static struct clk_hw_onecell_data *infra_clk_data; + +static const struct mtk_gate_regs infra_cg_regs = { + .set_ofs = 0x0040, + .clr_ofs = 0x0044, + .sta_ofs = 0x0048, +}; + +static const char * const ca53_parents[] __initconst = { + "clk26m", + "armca7pll", + "mainpll", + "univpll" +}; + +static const char * const ca72_parents[] __initconst = { + "clk26m", + "armca15pll", + "mainpll", + "univpll" +}; + +static const struct mtk_composite cpu_muxes[] = { + MUX(CLK_INFRA_CA53SEL, "infra_ca53_sel", ca53_parents, 0x0000, 0, 2), + MUX(CLK_INFRA_CA72SEL, "infra_ca72_sel", ca72_parents, 0x0000, 2, 2), +}; + +static const struct mtk_fixed_factor infra_early_divs[] = { + FACTOR(CLK_INFRA_CLK_13M, "clk13m", "clk26m", 1, 2), +}; + +static const struct mtk_gate infra_gates[] = { + GATE_ICG(CLK_INFRA_DBGCLK, "infra_dbgclk", "axi_sel", 0), + GATE_ICG(CLK_INFRA_SMI, "infra_smi", "mm_sel", 1), + GATE_ICG(CLK_INFRA_AUDIO, "infra_audio", "aud_intbus_sel", 5), + GATE_ICG(CLK_INFRA_GCE, "infra_gce", "axi_sel", 6), + GATE_ICG(CLK_INFRA_L2C_SRAM, "infra_l2c_sram", "axi_sel", 7), + GATE_ICG(CLK_INFRA_M4U, "infra_m4u", "mem_sel", 8), + GATE_ICG(CLK_INFRA_CPUM, "infra_cpum", "cpum_ck", 15), + GATE_ICG(CLK_INFRA_KP, "infra_kp", "axi_sel", 16), + GATE_ICG(CLK_INFRA_CEC, "infra_cec", "clk26m", 18), + GATE_ICG(CLK_INFRA_PMICSPI, "infra_pmicspi", "pmicspi_sel", 22), + GATE_ICG(CLK_INFRA_PMICWRAP, "infra_pmicwrap", "axi_sel", 23), +}; + +static u16 infrasys_rst_ofs[] = { 0x30, 0x34 }; + +static const struct mtk_clk_rst_desc clk_rst_desc = { + .version = MTK_RST_SIMPLE, + .rst_bank_ofs = infrasys_rst_ofs, + .rst_bank_nr = ARRAY_SIZE(infrasys_rst_ofs), +}; + +static const struct of_device_id of_match_clk_mt8173_infracfg[] = { + { .compatible = "mediatek,mt8173-infracfg" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, of_match_clk_mt8173_infracfg); + +static void clk_mt8173_infra_init_early(struct device_node *node) +{ + int i; + + infra_clk_data = mtk_alloc_clk_data(CLK_INFRA_NR_CLK); + if (!infra_clk_data) + return; + + for (i = 0; i < CLK_INFRA_NR_CLK; i++) + infra_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER); + + mtk_clk_register_factors(infra_early_divs, + ARRAY_SIZE(infra_early_divs), infra_clk_data); + + of_clk_add_hw_provider(node, of_clk_hw_onecell_get, infra_clk_data); +} +CLK_OF_DECLARE_DRIVER(mtk_infrasys, "mediatek,mt8173-infracfg", + clk_mt8173_infra_init_early); + +static int clk_mt8173_infracfg_probe(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + int r; + + r = mtk_clk_register_gates(&pdev->dev, node, infra_gates, + ARRAY_SIZE(infra_gates), infra_clk_data); + if (r) + return r; + + r = mtk_clk_register_cpumuxes(&pdev->dev, node, cpu_muxes, + ARRAY_SIZE(cpu_muxes), infra_clk_data); + if (r) + goto unregister_gates; + + r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, infra_clk_data); + if (r) + goto unregister_cpumuxes; + + r = mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc); + if (r) + goto unregister_clk_hw; + + return 0; + +unregister_clk_hw: + of_clk_del_provider(node); +unregister_cpumuxes: + mtk_clk_unregister_cpumuxes(cpu_muxes, ARRAY_SIZE(cpu_muxes), infra_clk_data); +unregister_gates: + mtk_clk_unregister_gates(infra_gates, ARRAY_SIZE(infra_gates), infra_clk_data); + return r; +} + +static void clk_mt8173_infracfg_remove(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev); + + of_clk_del_provider(node); + mtk_clk_unregister_cpumuxes(cpu_muxes, ARRAY_SIZE(cpu_muxes), clk_data); + mtk_clk_unregister_gates(infra_gates, ARRAY_SIZE(infra_gates), clk_data); + mtk_free_clk_data(clk_data); +} + +static struct platform_driver clk_mt8173_infracfg_drv = { + .driver = { + .name = "clk-mt8173-infracfg", + .of_match_table = of_match_clk_mt8173_infracfg, + }, + .probe = clk_mt8173_infracfg_probe, + .remove_new = clk_mt8173_infracfg_remove, +}; +module_platform_driver(clk_mt8173_infracfg_drv); + +MODULE_DESCRIPTION("MediaTek MT8173 infracfg clocks driver"); +MODULE_LICENSE("GPL"); |