1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2018 NXP 4 * Dong Aisheng <aisheng.dong@nxp.com> 5 */ 6 7 #include <linux/clk-provider.h> 8 #include <linux/err.h> 9 #include <linux/io.h> 10 #include <linux/module.h> 11 #include <linux/of.h> 12 #include <linux/platform_device.h> 13 #include <linux/pm_runtime.h> 14 #include <linux/slab.h> 15 16 #include "clk-scu.h" 17 #include "clk-imx8qxp-lpcg.h" 18 19 #include <dt-bindings/clock/imx8-clock.h> 20 21 /* 22 * struct imx8qxp_lpcg_data - Description of one LPCG clock 23 * @id: clock ID 24 * @name: clock name 25 * @parent: parent clock name 26 * @flags: common clock flags 27 * @offset: offset of this LPCG clock 28 * @bit_idx: bit index of this LPCG clock 29 * @hw_gate: whether supports HW autogate 30 * 31 * This structure describes one LPCG clock 32 */ 33 struct imx8qxp_lpcg_data { 34 int id; 35 char *name; 36 char *parent; 37 unsigned long flags; 38 u32 offset; 39 u8 bit_idx; 40 bool hw_gate; 41 }; 42 43 /* 44 * struct imx8qxp_ss_lpcg - Description of one subsystem LPCG clocks 45 * @lpcg: LPCG clocks array of one subsystem 46 * @num_lpcg: the number of LPCG clocks 47 * @num_max: the maximum number of LPCG clocks 48 * 49 * This structure describes each subsystem LPCG clocks information 50 * which then will be used to create respective LPCGs clocks 51 */ 52 struct imx8qxp_ss_lpcg { 53 const struct imx8qxp_lpcg_data *lpcg; 54 u8 num_lpcg; 55 u8 num_max; 56 }; 57 58 static const struct imx8qxp_lpcg_data imx8qxp_lpcg_adma[] = { 59 { IMX_ADMA_LPCG_UART0_IPG_CLK, "uart0_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_0_LPCG, 16, 0, }, 60 { IMX_ADMA_LPCG_UART0_BAUD_CLK, "uart0_lpcg_baud_clk", "uart0_clk", 0, ADMA_LPUART_0_LPCG, 0, 0, }, 61 { IMX_ADMA_LPCG_UART1_IPG_CLK, "uart1_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_1_LPCG, 16, 0, }, 62 { IMX_ADMA_LPCG_UART1_BAUD_CLK, "uart1_lpcg_baud_clk", "uart1_clk", 0, ADMA_LPUART_1_LPCG, 0, 0, }, 63 { IMX_ADMA_LPCG_UART2_IPG_CLK, "uart2_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_2_LPCG, 16, 0, }, 64 { IMX_ADMA_LPCG_UART2_BAUD_CLK, "uart2_lpcg_baud_clk", "uart2_clk", 0, ADMA_LPUART_2_LPCG, 0, 0, }, 65 { IMX_ADMA_LPCG_UART3_IPG_CLK, "uart3_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_3_LPCG, 16, 0, }, 66 { IMX_ADMA_LPCG_UART3_BAUD_CLK, "uart3_lpcg_baud_clk", "uart3_clk", 0, ADMA_LPUART_3_LPCG, 0, 0, }, 67 { IMX_ADMA_LPCG_I2C0_IPG_CLK, "i2c0_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_0_LPCG, 16, 0, }, 68 { IMX_ADMA_LPCG_I2C0_CLK, "i2c0_lpcg_clk", "i2c0_clk", 0, ADMA_LPI2C_0_LPCG, 0, 0, }, 69 { IMX_ADMA_LPCG_I2C1_IPG_CLK, "i2c1_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_1_LPCG, 16, 0, }, 70 { IMX_ADMA_LPCG_I2C1_CLK, "i2c1_lpcg_clk", "i2c1_clk", 0, ADMA_LPI2C_1_LPCG, 0, 0, }, 71 { IMX_ADMA_LPCG_I2C2_IPG_CLK, "i2c2_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_2_LPCG, 16, 0, }, 72 { IMX_ADMA_LPCG_I2C2_CLK, "i2c2_lpcg_clk", "i2c2_clk", 0, ADMA_LPI2C_2_LPCG, 0, 0, }, 73 { IMX_ADMA_LPCG_I2C3_IPG_CLK, "i2c3_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_3_LPCG, 16, 0, }, 74 { IMX_ADMA_LPCG_I2C3_CLK, "i2c3_lpcg_clk", "i2c3_clk", 0, ADMA_LPI2C_3_LPCG, 0, 0, }, 75 76 { IMX_ADMA_LPCG_DSP_CORE_CLK, "dsp_lpcg_core_clk", "dma_ipg_clk_root", 0, ADMA_HIFI_LPCG, 28, 0, }, 77 { IMX_ADMA_LPCG_DSP_IPG_CLK, "dsp_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_HIFI_LPCG, 20, 0, }, 78 { IMX_ADMA_LPCG_DSP_ADB_CLK, "dsp_lpcg_adb_clk", "dma_ipg_clk_root", 0, ADMA_HIFI_LPCG, 16, 0, }, 79 { IMX_ADMA_LPCG_OCRAM_IPG_CLK, "ocram_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_OCRAM_LPCG, 16, 0, }, 80 }; 81 82 static const struct imx8qxp_ss_lpcg imx8qxp_ss_adma = { 83 .lpcg = imx8qxp_lpcg_adma, 84 .num_lpcg = ARRAY_SIZE(imx8qxp_lpcg_adma), 85 .num_max = IMX_ADMA_LPCG_CLK_END, 86 }; 87 88 static const struct imx8qxp_lpcg_data imx8qxp_lpcg_conn[] = { 89 { IMX_CONN_LPCG_SDHC0_PER_CLK, "sdhc0_lpcg_per_clk", "sdhc0_clk", 0, CONN_USDHC_0_LPCG, 0, 0, }, 90 { IMX_CONN_LPCG_SDHC0_IPG_CLK, "sdhc0_lpcg_ipg_clk", "conn_ipg_clk_root", 0, CONN_USDHC_0_LPCG, 16, 0, }, 91 { IMX_CONN_LPCG_SDHC0_HCLK, "sdhc0_lpcg_ahb_clk", "conn_axi_clk_root", 0, CONN_USDHC_0_LPCG, 20, 0, }, 92 { IMX_CONN_LPCG_SDHC1_PER_CLK, "sdhc1_lpcg_per_clk", "sdhc1_clk", 0, CONN_USDHC_1_LPCG, 0, 0, }, 93 { IMX_CONN_LPCG_SDHC1_IPG_CLK, "sdhc1_lpcg_ipg_clk", "conn_ipg_clk_root", 0, CONN_USDHC_1_LPCG, 16, 0, }, 94 { IMX_CONN_LPCG_SDHC1_HCLK, "sdhc1_lpcg_ahb_clk", "conn_axi_clk_root", 0, CONN_USDHC_1_LPCG, 20, 0, }, 95 { IMX_CONN_LPCG_SDHC2_PER_CLK, "sdhc2_lpcg_per_clk", "sdhc2_clk", 0, CONN_USDHC_2_LPCG, 0, 0, }, 96 { IMX_CONN_LPCG_SDHC2_IPG_CLK, "sdhc2_lpcg_ipg_clk", "conn_ipg_clk_root", 0, CONN_USDHC_2_LPCG, 16, 0, }, 97 { IMX_CONN_LPCG_SDHC2_HCLK, "sdhc2_lpcg_ahb_clk", "conn_axi_clk_root", 0, CONN_USDHC_2_LPCG, 20, 0, }, 98 { IMX_CONN_LPCG_ENET0_ROOT_CLK, "enet0_ipg_root_clk", "enet0_clk", 0, CONN_ENET_0_LPCG, 0, 0, }, 99 { IMX_CONN_LPCG_ENET0_TX_CLK, "enet0_tx_clk", "enet0_clk", 0, CONN_ENET_0_LPCG, 4, 0, }, 100 { IMX_CONN_LPCG_ENET0_AHB_CLK, "enet0_ahb_clk", "conn_axi_clk_root", 0, CONN_ENET_0_LPCG, 8, 0, }, 101 { IMX_CONN_LPCG_ENET0_IPG_S_CLK, "enet0_ipg_s_clk", "conn_ipg_clk_root", 0, CONN_ENET_0_LPCG, 20, 0, }, 102 { IMX_CONN_LPCG_ENET0_IPG_CLK, "enet0_ipg_clk", "enet0_ipg_s_clk", 0, CONN_ENET_0_LPCG, 16, 0, }, 103 { IMX_CONN_LPCG_ENET1_ROOT_CLK, "enet1_ipg_root_clk", "enet1_clk", 0, CONN_ENET_1_LPCG, 0, 0, }, 104 { IMX_CONN_LPCG_ENET1_TX_CLK, "enet1_tx_clk", "enet1_clk", 0, CONN_ENET_1_LPCG, 4, 0, }, 105 { IMX_CONN_LPCG_ENET1_AHB_CLK, "enet1_ahb_clk", "conn_axi_clk_root", 0, CONN_ENET_1_LPCG, 8, 0, }, 106 { IMX_CONN_LPCG_ENET1_IPG_S_CLK, "enet1_ipg_s_clk", "conn_ipg_clk_root", 0, CONN_ENET_1_LPCG, 20, 0, }, 107 { IMX_CONN_LPCG_ENET1_IPG_CLK, "enet1_ipg_clk", "enet0_ipg_s_clk", 0, CONN_ENET_1_LPCG, 16, 0, }, 108 }; 109 110 static const struct imx8qxp_ss_lpcg imx8qxp_ss_conn = { 111 .lpcg = imx8qxp_lpcg_conn, 112 .num_lpcg = ARRAY_SIZE(imx8qxp_lpcg_conn), 113 .num_max = IMX_CONN_LPCG_CLK_END, 114 }; 115 116 static const struct imx8qxp_lpcg_data imx8qxp_lpcg_lsio[] = { 117 { IMX_LSIO_LPCG_PWM0_IPG_CLK, "pwm0_lpcg_ipg_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 0, 0, }, 118 { IMX_LSIO_LPCG_PWM0_IPG_HF_CLK, "pwm0_lpcg_ipg_hf_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 4, 0, }, 119 { IMX_LSIO_LPCG_PWM0_IPG_S_CLK, "pwm0_lpcg_ipg_s_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 16, 0, }, 120 { IMX_LSIO_LPCG_PWM0_IPG_SLV_CLK, "pwm0_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_0_LPCG, 20, 0, }, 121 { IMX_LSIO_LPCG_PWM0_IPG_MSTR_CLK, "pwm0_lpcg_ipg_mstr_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 24, 0, }, 122 { IMX_LSIO_LPCG_PWM1_IPG_CLK, "pwm1_lpcg_ipg_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 0, 0, }, 123 { IMX_LSIO_LPCG_PWM1_IPG_HF_CLK, "pwm1_lpcg_ipg_hf_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 4, 0, }, 124 { IMX_LSIO_LPCG_PWM1_IPG_S_CLK, "pwm1_lpcg_ipg_s_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 16, 0, }, 125 { IMX_LSIO_LPCG_PWM1_IPG_SLV_CLK, "pwm1_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_1_LPCG, 20, 0, }, 126 { IMX_LSIO_LPCG_PWM1_IPG_MSTR_CLK, "pwm1_lpcg_ipg_mstr_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 24, 0, }, 127 { IMX_LSIO_LPCG_PWM2_IPG_CLK, "pwm2_lpcg_ipg_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 0, 0, }, 128 { IMX_LSIO_LPCG_PWM2_IPG_HF_CLK, "pwm2_lpcg_ipg_hf_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 4, 0, }, 129 { IMX_LSIO_LPCG_PWM2_IPG_S_CLK, "pwm2_lpcg_ipg_s_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 16, 0, }, 130 { IMX_LSIO_LPCG_PWM2_IPG_SLV_CLK, "pwm2_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_2_LPCG, 20, 0, }, 131 { IMX_LSIO_LPCG_PWM2_IPG_MSTR_CLK, "pwm2_lpcg_ipg_mstr_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 24, 0, }, 132 { IMX_LSIO_LPCG_PWM3_IPG_CLK, "pwm3_lpcg_ipg_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 0, 0, }, 133 { IMX_LSIO_LPCG_PWM3_IPG_HF_CLK, "pwm3_lpcg_ipg_hf_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 4, 0, }, 134 { IMX_LSIO_LPCG_PWM3_IPG_S_CLK, "pwm3_lpcg_ipg_s_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 16, 0, }, 135 { IMX_LSIO_LPCG_PWM3_IPG_SLV_CLK, "pwm3_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_3_LPCG, 20, 0, }, 136 { IMX_LSIO_LPCG_PWM3_IPG_MSTR_CLK, "pwm3_lpcg_ipg_mstr_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 24, 0, }, 137 { IMX_LSIO_LPCG_PWM4_IPG_CLK, "pwm4_lpcg_ipg_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 0, 0, }, 138 { IMX_LSIO_LPCG_PWM4_IPG_HF_CLK, "pwm4_lpcg_ipg_hf_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 4, 0, }, 139 { IMX_LSIO_LPCG_PWM4_IPG_S_CLK, "pwm4_lpcg_ipg_s_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 16, 0, }, 140 { IMX_LSIO_LPCG_PWM4_IPG_SLV_CLK, "pwm4_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_4_LPCG, 20, 0, }, 141 { IMX_LSIO_LPCG_PWM4_IPG_MSTR_CLK, "pwm4_lpcg_ipg_mstr_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 24, 0, }, 142 { IMX_LSIO_LPCG_PWM5_IPG_CLK, "pwm5_lpcg_ipg_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 0, 0, }, 143 { IMX_LSIO_LPCG_PWM5_IPG_HF_CLK, "pwm5_lpcg_ipg_hf_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 4, 0, }, 144 { IMX_LSIO_LPCG_PWM5_IPG_S_CLK, "pwm5_lpcg_ipg_s_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 16, 0, }, 145 { IMX_LSIO_LPCG_PWM5_IPG_SLV_CLK, "pwm5_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_5_LPCG, 20, 0, }, 146 { IMX_LSIO_LPCG_PWM5_IPG_MSTR_CLK, "pwm5_lpcg_ipg_mstr_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 24, 0, }, 147 { IMX_LSIO_LPCG_PWM6_IPG_CLK, "pwm6_lpcg_ipg_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 0, 0, }, 148 { IMX_LSIO_LPCG_PWM6_IPG_HF_CLK, "pwm6_lpcg_ipg_hf_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 4, 0, }, 149 { IMX_LSIO_LPCG_PWM6_IPG_S_CLK, "pwm6_lpcg_ipg_s_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 16, 0, }, 150 { IMX_LSIO_LPCG_PWM6_IPG_SLV_CLK, "pwm6_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_6_LPCG, 20, 0, }, 151 { IMX_LSIO_LPCG_PWM6_IPG_MSTR_CLK, "pwm6_lpcg_ipg_mstr_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 24, 0, }, 152 }; 153 154 static const struct imx8qxp_ss_lpcg imx8qxp_ss_lsio = { 155 .lpcg = imx8qxp_lpcg_lsio, 156 .num_lpcg = ARRAY_SIZE(imx8qxp_lpcg_lsio), 157 .num_max = IMX_LSIO_LPCG_CLK_END, 158 }; 159 160 #define IMX_LPCG_MAX_CLKS 8 161 162 static struct clk_hw *imx_lpcg_of_clk_src_get(struct of_phandle_args *clkspec, 163 void *data) 164 { 165 struct clk_hw_onecell_data *hw_data = data; 166 unsigned int idx = clkspec->args[0] / 4; 167 168 if (idx >= hw_data->num) { 169 pr_err("%s: invalid index %u\n", __func__, idx); 170 return ERR_PTR(-EINVAL); 171 } 172 173 return hw_data->hws[idx]; 174 } 175 176 static int imx_lpcg_parse_clks_from_dt(struct platform_device *pdev, 177 struct device_node *np) 178 { 179 const char *output_names[IMX_LPCG_MAX_CLKS]; 180 const char *parent_names[IMX_LPCG_MAX_CLKS]; 181 unsigned int bit_offset[IMX_LPCG_MAX_CLKS]; 182 struct clk_hw_onecell_data *clk_data; 183 struct clk_hw **clk_hws; 184 void __iomem *base; 185 int count; 186 int idx; 187 int ret; 188 int i; 189 190 if (!of_device_is_compatible(np, "fsl,imx8qxp-lpcg")) 191 return -EINVAL; 192 193 base = devm_platform_ioremap_resource(pdev, 0); 194 if (IS_ERR(base)) 195 return PTR_ERR(base); 196 197 count = of_property_count_u32_elems(np, "clock-indices"); 198 if (count < 0) { 199 dev_err(&pdev->dev, "failed to count clocks\n"); 200 return -EINVAL; 201 } 202 203 /* 204 * A trick here is that we set the num of clks to the MAX instead 205 * of the count from clock-indices because one LPCG supports up to 206 * 8 clock outputs which each of them is fixed to 4 bits. Then we can 207 * easily get the clock by clk-indices (bit-offset) / 4. 208 * And the cost is very limited few pointers. 209 */ 210 211 clk_data = devm_kzalloc(&pdev->dev, struct_size(clk_data, hws, 212 IMX_LPCG_MAX_CLKS), GFP_KERNEL); 213 if (!clk_data) 214 return -ENOMEM; 215 216 clk_data->num = IMX_LPCG_MAX_CLKS; 217 clk_hws = clk_data->hws; 218 219 ret = of_property_read_u32_array(np, "clock-indices", bit_offset, 220 count); 221 if (ret < 0) { 222 dev_err(&pdev->dev, "failed to read clock-indices\n"); 223 return -EINVAL; 224 } 225 226 ret = of_clk_parent_fill(np, parent_names, count); 227 if (ret != count) { 228 dev_err(&pdev->dev, "failed to get clock parent names\n"); 229 return count; 230 } 231 232 ret = of_property_read_string_array(np, "clock-output-names", 233 output_names, count); 234 if (ret != count) { 235 dev_err(&pdev->dev, "failed to read clock-output-names\n"); 236 return -EINVAL; 237 } 238 239 pm_runtime_get_noresume(&pdev->dev); 240 pm_runtime_set_active(&pdev->dev); 241 pm_runtime_set_autosuspend_delay(&pdev->dev, 500); 242 pm_runtime_use_autosuspend(&pdev->dev); 243 pm_runtime_enable(&pdev->dev); 244 245 for (i = 0; i < count; i++) { 246 idx = bit_offset[i] / 4; 247 if (idx >= IMX_LPCG_MAX_CLKS) { 248 dev_warn(&pdev->dev, "invalid bit offset of clock %d\n", 249 i); 250 ret = -EINVAL; 251 goto unreg; 252 } 253 254 clk_hws[idx] = imx_clk_lpcg_scu_dev(&pdev->dev, output_names[i], 255 parent_names[i], 0, base, 256 bit_offset[i], false); 257 if (IS_ERR(clk_hws[idx])) { 258 dev_warn(&pdev->dev, "failed to register clock %d\n", 259 idx); 260 ret = PTR_ERR(clk_hws[idx]); 261 goto unreg; 262 } 263 } 264 265 ret = devm_of_clk_add_hw_provider(&pdev->dev, imx_lpcg_of_clk_src_get, 266 clk_data); 267 if (ret) 268 goto unreg; 269 270 pm_runtime_mark_last_busy(&pdev->dev); 271 pm_runtime_put_autosuspend(&pdev->dev); 272 273 return 0; 274 275 unreg: 276 while (--i >= 0) { 277 idx = bit_offset[i] / 4; 278 if (clk_hws[idx]) 279 imx_clk_lpcg_scu_unregister(clk_hws[idx]); 280 } 281 282 pm_runtime_disable(&pdev->dev); 283 284 return ret; 285 } 286 287 static int imx8qxp_lpcg_clk_probe(struct platform_device *pdev) 288 { 289 struct device *dev = &pdev->dev; 290 struct device_node *np = dev->of_node; 291 struct clk_hw_onecell_data *clk_data; 292 const struct imx8qxp_ss_lpcg *ss_lpcg; 293 const struct imx8qxp_lpcg_data *lpcg; 294 struct resource *res; 295 struct clk_hw **clks; 296 void __iomem *base; 297 int ret; 298 int i; 299 300 /* try new binding to parse clocks from device tree first */ 301 ret = imx_lpcg_parse_clks_from_dt(pdev, np); 302 if (!ret) 303 return 0; 304 305 ss_lpcg = of_device_get_match_data(dev); 306 if (!ss_lpcg) 307 return -ENODEV; 308 309 /* 310 * Please don't replace this with devm_platform_ioremap_resource. 311 * 312 * devm_platform_ioremap_resource calls devm_ioremap_resource which 313 * differs from devm_ioremap by also calling devm_request_mem_region 314 * and preventing other mappings in the same area. 315 * 316 * On imx8 the LPCG nodes map entire subsystems and overlap 317 * peripherals, this means that using devm_platform_ioremap_resource 318 * will cause many devices to fail to probe including serial ports. 319 */ 320 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 321 if (!res) 322 return -EINVAL; 323 base = devm_ioremap(dev, res->start, resource_size(res)); 324 if (!base) 325 return -ENOMEM; 326 327 clk_data = devm_kzalloc(&pdev->dev, struct_size(clk_data, hws, 328 ss_lpcg->num_max), GFP_KERNEL); 329 if (!clk_data) 330 return -ENOMEM; 331 332 clk_data->num = ss_lpcg->num_max; 333 clks = clk_data->hws; 334 335 for (i = 0; i < ss_lpcg->num_lpcg; i++) { 336 lpcg = ss_lpcg->lpcg + i; 337 clks[lpcg->id] = imx_clk_lpcg_scu(lpcg->name, lpcg->parent, 338 lpcg->flags, base + lpcg->offset, 339 lpcg->bit_idx, lpcg->hw_gate); 340 } 341 342 for (i = 0; i < clk_data->num; i++) { 343 if (IS_ERR(clks[i])) 344 pr_warn("i.MX clk %u: register failed with %ld\n", 345 i, PTR_ERR(clks[i])); 346 } 347 348 return of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data); 349 } 350 351 static const struct of_device_id imx8qxp_lpcg_match[] = { 352 { .compatible = "fsl,imx8qxp-lpcg-adma", &imx8qxp_ss_adma, }, 353 { .compatible = "fsl,imx8qxp-lpcg-conn", &imx8qxp_ss_conn, }, 354 { .compatible = "fsl,imx8qxp-lpcg-lsio", &imx8qxp_ss_lsio, }, 355 { .compatible = "fsl,imx8qxp-lpcg", NULL }, 356 { /* sentinel */ } 357 }; 358 359 static struct platform_driver imx8qxp_lpcg_clk_driver = { 360 .driver = { 361 .name = "imx8qxp-lpcg-clk", 362 .of_match_table = imx8qxp_lpcg_match, 363 .pm = &imx_clk_lpcg_scu_pm_ops, 364 .suppress_bind_attrs = true, 365 }, 366 .probe = imx8qxp_lpcg_clk_probe, 367 }; 368 369 module_platform_driver(imx8qxp_lpcg_clk_driver); 370 371 MODULE_AUTHOR("Aisheng Dong <aisheng.dong@nxp.com>"); 372 MODULE_DESCRIPTION("NXP i.MX8QXP LPCG clock driver"); 373 MODULE_LICENSE("GPL v2"); 374