// SPDX-License-Identifier: GPL-2.0+ /* * Copyright 2018 NXP * Dong Aisheng */ #include #include #include #include #include #include #include #include #include "clk-scu.h" #include "clk-imx8qxp-lpcg.h" #include /* * struct imx8qxp_lpcg_data - Description of one LPCG clock * @id: clock ID * @name: clock name * @parent: parent clock name * @flags: common clock flags * @offset: offset of this LPCG clock * @bit_idx: bit index of this LPCG clock * @hw_gate: whether supports HW autogate * * This structure describes one LPCG clock */ struct imx8qxp_lpcg_data { int id; char *name; char *parent; unsigned long flags; u32 offset; u8 bit_idx; bool hw_gate; }; /* * struct imx8qxp_ss_lpcg - Description of one subsystem LPCG clocks * @lpcg: LPCG clocks array of one subsystem * @num_lpcg: the number of LPCG clocks * @num_max: the maximum number of LPCG clocks * * This structure describes each subsystem LPCG clocks information * which then will be used to create respective LPCGs clocks */ struct imx8qxp_ss_lpcg { const struct imx8qxp_lpcg_data *lpcg; u8 num_lpcg; u8 num_max; }; static const struct imx8qxp_lpcg_data imx8qxp_lpcg_adma[] = { { IMX_ADMA_LPCG_UART0_IPG_CLK, "uart0_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_0_LPCG, 16, 0, }, { IMX_ADMA_LPCG_UART0_BAUD_CLK, "uart0_lpcg_baud_clk", "uart0_clk", 0, ADMA_LPUART_0_LPCG, 0, 0, }, { IMX_ADMA_LPCG_UART1_IPG_CLK, "uart1_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_1_LPCG, 16, 0, }, { IMX_ADMA_LPCG_UART1_BAUD_CLK, "uart1_lpcg_baud_clk", "uart1_clk", 0, ADMA_LPUART_1_LPCG, 0, 0, }, { IMX_ADMA_LPCG_UART2_IPG_CLK, "uart2_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_2_LPCG, 16, 0, }, { IMX_ADMA_LPCG_UART2_BAUD_CLK, "uart2_lpcg_baud_clk", "uart2_clk", 0, ADMA_LPUART_2_LPCG, 0, 0, }, { IMX_ADMA_LPCG_UART3_IPG_CLK, "uart3_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_3_LPCG, 16, 0, }, { IMX_ADMA_LPCG_UART3_BAUD_CLK, "uart3_lpcg_baud_clk", "uart3_clk", 0, ADMA_LPUART_3_LPCG, 0, 0, }, { IMX_ADMA_LPCG_I2C0_IPG_CLK, "i2c0_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_0_LPCG, 16, 0, }, { IMX_ADMA_LPCG_I2C0_CLK, "i2c0_lpcg_clk", "i2c0_clk", 0, ADMA_LPI2C_0_LPCG, 0, 0, }, { IMX_ADMA_LPCG_I2C1_IPG_CLK, "i2c1_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_1_LPCG, 16, 0, }, { IMX_ADMA_LPCG_I2C1_CLK, "i2c1_lpcg_clk", "i2c1_clk", 0, ADMA_LPI2C_1_LPCG, 0, 0, }, { IMX_ADMA_LPCG_I2C2_IPG_CLK, "i2c2_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_2_LPCG, 16, 0, }, { IMX_ADMA_LPCG_I2C2_CLK, "i2c2_lpcg_clk", "i2c2_clk", 0, ADMA_LPI2C_2_LPCG, 0, 0, }, { IMX_ADMA_LPCG_I2C3_IPG_CLK, "i2c3_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_3_LPCG, 16, 0, }, { IMX_ADMA_LPCG_I2C3_CLK, "i2c3_lpcg_clk", "i2c3_clk", 0, ADMA_LPI2C_3_LPCG, 0, 0, }, { IMX_ADMA_LPCG_DSP_CORE_CLK, "dsp_lpcg_core_clk", "dma_ipg_clk_root", 0, ADMA_HIFI_LPCG, 28, 0, }, { IMX_ADMA_LPCG_DSP_IPG_CLK, "dsp_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_HIFI_LPCG, 20, 0, }, { IMX_ADMA_LPCG_DSP_ADB_CLK, "dsp_lpcg_adb_clk", "dma_ipg_clk_root", 0, ADMA_HIFI_LPCG, 16, 0, }, { IMX_ADMA_LPCG_OCRAM_IPG_CLK, "ocram_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_OCRAM_LPCG, 16, 0, }, }; static const struct imx8qxp_ss_lpcg imx8qxp_ss_adma = { .lpcg = imx8qxp_lpcg_adma, .num_lpcg = ARRAY_SIZE(imx8qxp_lpcg_adma), .num_max = IMX_ADMA_LPCG_CLK_END, }; static const struct imx8qxp_lpcg_data imx8qxp_lpcg_conn[] = { { IMX_CONN_LPCG_SDHC0_PER_CLK, "sdhc0_lpcg_per_clk", "sdhc0_clk", 0, CONN_USDHC_0_LPCG, 0, 0, }, { IMX_CONN_LPCG_SDHC0_IPG_CLK, "sdhc0_lpcg_ipg_clk", "conn_ipg_clk_root", 0, CONN_USDHC_0_LPCG, 16, 0, }, { IMX_CONN_LPCG_SDHC0_HCLK, "sdhc0_lpcg_ahb_clk", "conn_axi_clk_root", 0, CONN_USDHC_0_LPCG, 20, 0, }, { IMX_CONN_LPCG_SDHC1_PER_CLK, "sdhc1_lpcg_per_clk", "sdhc1_clk", 0, CONN_USDHC_1_LPCG, 0, 0, }, { IMX_CONN_LPCG_SDHC1_IPG_CLK, "sdhc1_lpcg_ipg_clk", "conn_ipg_clk_root", 0, CONN_USDHC_1_LPCG, 16, 0, }, { IMX_CONN_LPCG_SDHC1_HCLK, "sdhc1_lpcg_ahb_clk", "conn_axi_clk_root", 0, CONN_USDHC_1_LPCG, 20, 0, }, { IMX_CONN_LPCG_SDHC2_PER_CLK, "sdhc2_lpcg_per_clk", "sdhc2_clk", 0, CONN_USDHC_2_LPCG, 0, 0, }, { IMX_CONN_LPCG_SDHC2_IPG_CLK, "sdhc2_lpcg_ipg_clk", "conn_ipg_clk_root", 0, CONN_USDHC_2_LPCG, 16, 0, }, { IMX_CONN_LPCG_SDHC2_HCLK, "sdhc2_lpcg_ahb_clk", "conn_axi_clk_root", 0, CONN_USDHC_2_LPCG, 20, 0, }, { IMX_CONN_LPCG_ENET0_ROOT_CLK, "enet0_ipg_root_clk", "enet0_clk", 0, CONN_ENET_0_LPCG, 0, 0, }, { IMX_CONN_LPCG_ENET0_TX_CLK, "enet0_tx_clk", "enet0_clk", 0, CONN_ENET_0_LPCG, 4, 0, }, { IMX_CONN_LPCG_ENET0_AHB_CLK, "enet0_ahb_clk", "conn_axi_clk_root", 0, CONN_ENET_0_LPCG, 8, 0, }, { IMX_CONN_LPCG_ENET0_IPG_S_CLK, "enet0_ipg_s_clk", "conn_ipg_clk_root", 0, CONN_ENET_0_LPCG, 20, 0, }, { IMX_CONN_LPCG_ENET0_IPG_CLK, "enet0_ipg_clk", "enet0_ipg_s_clk", 0, CONN_ENET_0_LPCG, 16, 0, }, { IMX_CONN_LPCG_ENET1_ROOT_CLK, "enet1_ipg_root_clk", "enet1_clk", 0, CONN_ENET_1_LPCG, 0, 0, }, { IMX_CONN_LPCG_ENET1_TX_CLK, "enet1_tx_clk", "enet1_clk", 0, CONN_ENET_1_LPCG, 4, 0, }, { IMX_CONN_LPCG_ENET1_AHB_CLK, "enet1_ahb_clk", "conn_axi_clk_root", 0, CONN_ENET_1_LPCG, 8, 0, }, { IMX_CONN_LPCG_ENET1_IPG_S_CLK, "enet1_ipg_s_clk", "conn_ipg_clk_root", 0, CONN_ENET_1_LPCG, 20, 0, }, { IMX_CONN_LPCG_ENET1_IPG_CLK, "enet1_ipg_clk", "enet0_ipg_s_clk", 0, CONN_ENET_1_LPCG, 16, 0, }, }; static const struct imx8qxp_ss_lpcg imx8qxp_ss_conn = { .lpcg = imx8qxp_lpcg_conn, .num_lpcg = ARRAY_SIZE(imx8qxp_lpcg_conn), .num_max = IMX_CONN_LPCG_CLK_END, }; static const struct imx8qxp_lpcg_data imx8qxp_lpcg_lsio[] = { { IMX_LSIO_LPCG_PWM0_IPG_CLK, "pwm0_lpcg_ipg_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 0, 0, }, { IMX_LSIO_LPCG_PWM0_IPG_HF_CLK, "pwm0_lpcg_ipg_hf_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 4, 0, }, { IMX_LSIO_LPCG_PWM0_IPG_S_CLK, "pwm0_lpcg_ipg_s_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 16, 0, }, { IMX_LSIO_LPCG_PWM0_IPG_SLV_CLK, "pwm0_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_0_LPCG, 20, 0, }, { IMX_LSIO_LPCG_PWM0_IPG_MSTR_CLK, "pwm0_lpcg_ipg_mstr_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 24, 0, }, { IMX_LSIO_LPCG_PWM1_IPG_CLK, "pwm1_lpcg_ipg_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 0, 0, }, { IMX_LSIO_LPCG_PWM1_IPG_HF_CLK, "pwm1_lpcg_ipg_hf_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 4, 0, }, { IMX_LSIO_LPCG_PWM1_IPG_S_CLK, "pwm1_lpcg_ipg_s_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 16, 0, }, { IMX_LSIO_LPCG_PWM1_IPG_SLV_CLK, "pwm1_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_1_LPCG, 20, 0, }, { IMX_LSIO_LPCG_PWM1_IPG_MSTR_CLK, "pwm1_lpcg_ipg_mstr_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 24, 0, }, { IMX_LSIO_LPCG_PWM2_IPG_CLK, "pwm2_lpcg_ipg_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 0, 0, }, { IMX_LSIO_LPCG_PWM2_IPG_HF_CLK, "pwm2_lpcg_ipg_hf_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 4, 0, }, { IMX_LSIO_LPCG_PWM2_IPG_S_CLK, "pwm2_lpcg_ipg_s_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 16, 0, }, { IMX_LSIO_LPCG_PWM2_IPG_SLV_CLK, "pwm2_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_2_LPCG, 20, 0, }, { IMX_LSIO_LPCG_PWM2_IPG_MSTR_CLK, "pwm2_lpcg_ipg_mstr_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 24, 0, }, { IMX_LSIO_LPCG_PWM3_IPG_CLK, "pwm3_lpcg_ipg_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 0, 0, }, { IMX_LSIO_LPCG_PWM3_IPG_HF_CLK, "pwm3_lpcg_ipg_hf_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 4, 0, }, { IMX_LSIO_LPCG_PWM3_IPG_S_CLK, "pwm3_lpcg_ipg_s_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 16, 0, }, { IMX_LSIO_LPCG_PWM3_IPG_SLV_CLK, "pwm3_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_3_LPCG, 20, 0, }, { IMX_LSIO_LPCG_PWM3_IPG_MSTR_CLK, "pwm3_lpcg_ipg_mstr_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 24, 0, }, { IMX_LSIO_LPCG_PWM4_IPG_CLK, "pwm4_lpcg_ipg_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 0, 0, }, { IMX_LSIO_LPCG_PWM4_IPG_HF_CLK, "pwm4_lpcg_ipg_hf_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 4, 0, }, { IMX_LSIO_LPCG_PWM4_IPG_S_CLK, "pwm4_lpcg_ipg_s_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 16, 0, }, { IMX_LSIO_LPCG_PWM4_IPG_SLV_CLK, "pwm4_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_4_LPCG, 20, 0, }, { IMX_LSIO_LPCG_PWM4_IPG_MSTR_CLK, "pwm4_lpcg_ipg_mstr_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 24, 0, }, { IMX_LSIO_LPCG_PWM5_IPG_CLK, "pwm5_lpcg_ipg_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 0, 0, }, { IMX_LSIO_LPCG_PWM5_IPG_HF_CLK, "pwm5_lpcg_ipg_hf_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 4, 0, }, { IMX_LSIO_LPCG_PWM5_IPG_S_CLK, "pwm5_lpcg_ipg_s_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 16, 0, }, { IMX_LSIO_LPCG_PWM5_IPG_SLV_CLK, "pwm5_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_5_LPCG, 20, 0, }, { IMX_LSIO_LPCG_PWM5_IPG_MSTR_CLK, "pwm5_lpcg_ipg_mstr_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 24, 0, }, { IMX_LSIO_LPCG_PWM6_IPG_CLK, "pwm6_lpcg_ipg_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 0, 0, }, { IMX_LSIO_LPCG_PWM6_IPG_HF_CLK, "pwm6_lpcg_ipg_hf_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 4, 0, }, { IMX_LSIO_LPCG_PWM6_IPG_S_CLK, "pwm6_lpcg_ipg_s_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 16, 0, }, { IMX_LSIO_LPCG_PWM6_IPG_SLV_CLK, "pwm6_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_6_LPCG, 20, 0, }, { IMX_LSIO_LPCG_PWM6_IPG_MSTR_CLK, "pwm6_lpcg_ipg_mstr_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 24, 0, }, }; static const struct imx8qxp_ss_lpcg imx8qxp_ss_lsio = { .lpcg = imx8qxp_lpcg_lsio, .num_lpcg = ARRAY_SIZE(imx8qxp_lpcg_lsio), .num_max = IMX_LSIO_LPCG_CLK_END, }; #define IMX_LPCG_MAX_CLKS 8 static struct clk_hw *imx_lpcg_of_clk_src_get(struct of_phandle_args *clkspec, void *data) { struct clk_hw_onecell_data *hw_data = data; unsigned int idx = clkspec->args[0] / 4; if (idx >= hw_data->num) { pr_err("%s: invalid index %u\n", __func__, idx); return ERR_PTR(-EINVAL); } return hw_data->hws[idx]; } static int imx_lpcg_parse_clks_from_dt(struct platform_device *pdev, struct device_node *np) { const char *output_names[IMX_LPCG_MAX_CLKS]; const char *parent_names[IMX_LPCG_MAX_CLKS]; unsigned int bit_offset[IMX_LPCG_MAX_CLKS]; struct clk_hw_onecell_data *clk_data; struct clk_hw **clk_hws; void __iomem *base; int count; int idx; int ret; int i; if (!of_device_is_compatible(np, "fsl,imx8qxp-lpcg")) return -EINVAL; base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) return PTR_ERR(base); count = of_property_count_u32_elems(np, "clock-indices"); if (count < 0) { dev_err(&pdev->dev, "failed to count clocks\n"); return -EINVAL; } /* * A trick here is that we set the num of clks to the MAX instead * of the count from clock-indices because one LPCG supports up to * 8 clock outputs which each of them is fixed to 4 bits. Then we can * easily get the clock by clk-indices (bit-offset) / 4. * And the cost is very limited few pointers. */ clk_data = devm_kzalloc(&pdev->dev, struct_size(clk_data, hws, IMX_LPCG_MAX_CLKS), GFP_KERNEL); if (!clk_data) return -ENOMEM; clk_data->num = IMX_LPCG_MAX_CLKS; clk_hws = clk_data->hws; ret = of_property_read_u32_array(np, "clock-indices", bit_offset, count); if (ret < 0) { dev_err(&pdev->dev, "failed to read clock-indices\n"); return -EINVAL; } ret = of_clk_parent_fill(np, parent_names, count); if (ret != count) { dev_err(&pdev->dev, "failed to get clock parent names\n"); return count; } ret = of_property_read_string_array(np, "clock-output-names", output_names, count); if (ret != count) { dev_err(&pdev->dev, "failed to read clock-output-names\n"); return -EINVAL; } pm_runtime_get_noresume(&pdev->dev); pm_runtime_set_active(&pdev->dev); pm_runtime_set_autosuspend_delay(&pdev->dev, 500); pm_runtime_use_autosuspend(&pdev->dev); pm_runtime_enable(&pdev->dev); for (i = 0; i < count; i++) { idx = bit_offset[i] / 4; if (idx >= IMX_LPCG_MAX_CLKS) { dev_warn(&pdev->dev, "invalid bit offset of clock %d\n", i); ret = -EINVAL; goto unreg; } clk_hws[idx] = imx_clk_lpcg_scu_dev(&pdev->dev, output_names[i], parent_names[i], 0, base, bit_offset[i], false); if (IS_ERR(clk_hws[idx])) { dev_warn(&pdev->dev, "failed to register clock %d\n", idx); ret = PTR_ERR(clk_hws[idx]); goto unreg; } } ret = devm_of_clk_add_hw_provider(&pdev->dev, imx_lpcg_of_clk_src_get, clk_data); if (ret) goto unreg; pm_runtime_mark_last_busy(&pdev->dev); pm_runtime_put_autosuspend(&pdev->dev); return 0; unreg: while (--i >= 0) { idx = bit_offset[i] / 4; if (clk_hws[idx]) imx_clk_lpcg_scu_unregister(clk_hws[idx]); } pm_runtime_disable(&pdev->dev); return ret; } static int imx8qxp_lpcg_clk_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; struct clk_hw_onecell_data *clk_data; const struct imx8qxp_ss_lpcg *ss_lpcg; const struct imx8qxp_lpcg_data *lpcg; struct resource *res; struct clk_hw **clks; void __iomem *base; int ret; int i; /* try new binding to parse clocks from device tree first */ ret = imx_lpcg_parse_clks_from_dt(pdev, np); if (!ret) return 0; ss_lpcg = of_device_get_match_data(dev); if (!ss_lpcg) return -ENODEV; /* * Please don't replace this with devm_platform_ioremap_resource. * * devm_platform_ioremap_resource calls devm_ioremap_resource which * differs from devm_ioremap by also calling devm_request_mem_region * and preventing other mappings in the same area. * * On imx8 the LPCG nodes map entire subsystems and overlap * peripherals, this means that using devm_platform_ioremap_resource * will cause many devices to fail to probe including serial ports. */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -EINVAL; base = devm_ioremap(dev, res->start, resource_size(res)); if (!base) return -ENOMEM; clk_data = devm_kzalloc(&pdev->dev, struct_size(clk_data, hws, ss_lpcg->num_max), GFP_KERNEL); if (!clk_data) return -ENOMEM; clk_data->num = ss_lpcg->num_max; clks = clk_data->hws; for (i = 0; i < ss_lpcg->num_lpcg; i++) { lpcg = ss_lpcg->lpcg + i; clks[lpcg->id] = imx_clk_lpcg_scu(lpcg->name, lpcg->parent, lpcg->flags, base + lpcg->offset, lpcg->bit_idx, lpcg->hw_gate); } for (i = 0; i < clk_data->num; i++) { if (IS_ERR(clks[i])) pr_warn("i.MX clk %u: register failed with %ld\n", i, PTR_ERR(clks[i])); } return of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data); } static const struct of_device_id imx8qxp_lpcg_match[] = { { .compatible = "fsl,imx8qxp-lpcg-adma", &imx8qxp_ss_adma, }, { .compatible = "fsl,imx8qxp-lpcg-conn", &imx8qxp_ss_conn, }, { .compatible = "fsl,imx8qxp-lpcg-lsio", &imx8qxp_ss_lsio, }, { .compatible = "fsl,imx8qxp-lpcg", NULL }, { /* sentinel */ } }; static struct platform_driver imx8qxp_lpcg_clk_driver = { .driver = { .name = "imx8qxp-lpcg-clk", .of_match_table = imx8qxp_lpcg_match, .pm = &imx_clk_lpcg_scu_pm_ops, .suppress_bind_attrs = true, }, .probe = imx8qxp_lpcg_clk_probe, }; module_platform_driver(imx8qxp_lpcg_clk_driver); MODULE_AUTHOR("Aisheng Dong "); MODULE_DESCRIPTION("NXP i.MX8QXP LPCG clock driver"); MODULE_LICENSE("GPL v2");