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/of_address.h>
13 #include <linux/of_device.h>
14 #include <linux/platform_device.h>
15 #include <linux/pm_runtime.h>
16 #include <linux/slab.h>
17
18 #include "clk-scu.h"
19 #include "clk-imx8qxp-lpcg.h"
20
21 #include <dt-bindings/clock/imx8-clock.h>
22
23 /*
24 * struct imx8qxp_lpcg_data - Description of one LPCG clock
25 * @id: clock ID
26 * @name: clock name
27 * @parent: parent clock name
28 * @flags: common clock flags
29 * @offset: offset of this LPCG clock
30 * @bit_idx: bit index of this LPCG clock
31 * @hw_gate: whether supports HW autogate
32 *
33 * This structure describes one LPCG clock
34 */
35 struct imx8qxp_lpcg_data {
36 int id;
37 char *name;
38 char *parent;
39 unsigned long flags;
40 u32 offset;
41 u8 bit_idx;
42 bool hw_gate;
43 };
44
45 /*
46 * struct imx8qxp_ss_lpcg - Description of one subsystem LPCG clocks
47 * @lpcg: LPCG clocks array of one subsystem
48 * @num_lpcg: the number of LPCG clocks
49 * @num_max: the maximum number of LPCG clocks
50 *
51 * This structure describes each subsystem LPCG clocks information
52 * which then will be used to create respective LPCGs clocks
53 */
54 struct imx8qxp_ss_lpcg {
55 const struct imx8qxp_lpcg_data *lpcg;
56 u8 num_lpcg;
57 u8 num_max;
58 };
59
60 static const struct imx8qxp_lpcg_data imx8qxp_lpcg_adma[] = {
61 { IMX_ADMA_LPCG_UART0_IPG_CLK, "uart0_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_0_LPCG, 16, 0, },
62 { IMX_ADMA_LPCG_UART0_BAUD_CLK, "uart0_lpcg_baud_clk", "uart0_clk", 0, ADMA_LPUART_0_LPCG, 0, 0, },
63 { IMX_ADMA_LPCG_UART1_IPG_CLK, "uart1_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_1_LPCG, 16, 0, },
64 { IMX_ADMA_LPCG_UART1_BAUD_CLK, "uart1_lpcg_baud_clk", "uart1_clk", 0, ADMA_LPUART_1_LPCG, 0, 0, },
65 { IMX_ADMA_LPCG_UART2_IPG_CLK, "uart2_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_2_LPCG, 16, 0, },
66 { IMX_ADMA_LPCG_UART2_BAUD_CLK, "uart2_lpcg_baud_clk", "uart2_clk", 0, ADMA_LPUART_2_LPCG, 0, 0, },
67 { IMX_ADMA_LPCG_UART3_IPG_CLK, "uart3_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_3_LPCG, 16, 0, },
68 { IMX_ADMA_LPCG_UART3_BAUD_CLK, "uart3_lpcg_baud_clk", "uart3_clk", 0, ADMA_LPUART_3_LPCG, 0, 0, },
69 { IMX_ADMA_LPCG_I2C0_IPG_CLK, "i2c0_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_0_LPCG, 16, 0, },
70 { IMX_ADMA_LPCG_I2C0_CLK, "i2c0_lpcg_clk", "i2c0_clk", 0, ADMA_LPI2C_0_LPCG, 0, 0, },
71 { IMX_ADMA_LPCG_I2C1_IPG_CLK, "i2c1_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_1_LPCG, 16, 0, },
72 { IMX_ADMA_LPCG_I2C1_CLK, "i2c1_lpcg_clk", "i2c1_clk", 0, ADMA_LPI2C_1_LPCG, 0, 0, },
73 { IMX_ADMA_LPCG_I2C2_IPG_CLK, "i2c2_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_2_LPCG, 16, 0, },
74 { IMX_ADMA_LPCG_I2C2_CLK, "i2c2_lpcg_clk", "i2c2_clk", 0, ADMA_LPI2C_2_LPCG, 0, 0, },
75 { IMX_ADMA_LPCG_I2C3_IPG_CLK, "i2c3_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_3_LPCG, 16, 0, },
76 { IMX_ADMA_LPCG_I2C3_CLK, "i2c3_lpcg_clk", "i2c3_clk", 0, ADMA_LPI2C_3_LPCG, 0, 0, },
77
78 { IMX_ADMA_LPCG_DSP_CORE_CLK, "dsp_lpcg_core_clk", "dma_ipg_clk_root", 0, ADMA_HIFI_LPCG, 28, 0, },
79 { IMX_ADMA_LPCG_DSP_IPG_CLK, "dsp_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_HIFI_LPCG, 20, 0, },
80 { IMX_ADMA_LPCG_DSP_ADB_CLK, "dsp_lpcg_adb_clk", "dma_ipg_clk_root", 0, ADMA_HIFI_LPCG, 16, 0, },
81 { IMX_ADMA_LPCG_OCRAM_IPG_CLK, "ocram_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_OCRAM_LPCG, 16, 0, },
82 };
83
84 static const struct imx8qxp_ss_lpcg imx8qxp_ss_adma = {
85 .lpcg = imx8qxp_lpcg_adma,
86 .num_lpcg = ARRAY_SIZE(imx8qxp_lpcg_adma),
87 .num_max = IMX_ADMA_LPCG_CLK_END,
88 };
89
90 static const struct imx8qxp_lpcg_data imx8qxp_lpcg_conn[] = {
91 { IMX_CONN_LPCG_SDHC0_PER_CLK, "sdhc0_lpcg_per_clk", "sdhc0_clk", 0, CONN_USDHC_0_LPCG, 0, 0, },
92 { IMX_CONN_LPCG_SDHC0_IPG_CLK, "sdhc0_lpcg_ipg_clk", "conn_ipg_clk_root", 0, CONN_USDHC_0_LPCG, 16, 0, },
93 { IMX_CONN_LPCG_SDHC0_HCLK, "sdhc0_lpcg_ahb_clk", "conn_axi_clk_root", 0, CONN_USDHC_0_LPCG, 20, 0, },
94 { IMX_CONN_LPCG_SDHC1_PER_CLK, "sdhc1_lpcg_per_clk", "sdhc1_clk", 0, CONN_USDHC_1_LPCG, 0, 0, },
95 { IMX_CONN_LPCG_SDHC1_IPG_CLK, "sdhc1_lpcg_ipg_clk", "conn_ipg_clk_root", 0, CONN_USDHC_1_LPCG, 16, 0, },
96 { IMX_CONN_LPCG_SDHC1_HCLK, "sdhc1_lpcg_ahb_clk", "conn_axi_clk_root", 0, CONN_USDHC_1_LPCG, 20, 0, },
97 { IMX_CONN_LPCG_SDHC2_PER_CLK, "sdhc2_lpcg_per_clk", "sdhc2_clk", 0, CONN_USDHC_2_LPCG, 0, 0, },
98 { IMX_CONN_LPCG_SDHC2_IPG_CLK, "sdhc2_lpcg_ipg_clk", "conn_ipg_clk_root", 0, CONN_USDHC_2_LPCG, 16, 0, },
99 { IMX_CONN_LPCG_SDHC2_HCLK, "sdhc2_lpcg_ahb_clk", "conn_axi_clk_root", 0, CONN_USDHC_2_LPCG, 20, 0, },
100 { IMX_CONN_LPCG_ENET0_ROOT_CLK, "enet0_ipg_root_clk", "enet0_clk", 0, CONN_ENET_0_LPCG, 0, 0, },
101 { IMX_CONN_LPCG_ENET0_TX_CLK, "enet0_tx_clk", "enet0_clk", 0, CONN_ENET_0_LPCG, 4, 0, },
102 { IMX_CONN_LPCG_ENET0_AHB_CLK, "enet0_ahb_clk", "conn_axi_clk_root", 0, CONN_ENET_0_LPCG, 8, 0, },
103 { IMX_CONN_LPCG_ENET0_IPG_S_CLK, "enet0_ipg_s_clk", "conn_ipg_clk_root", 0, CONN_ENET_0_LPCG, 20, 0, },
104 { IMX_CONN_LPCG_ENET0_IPG_CLK, "enet0_ipg_clk", "enet0_ipg_s_clk", 0, CONN_ENET_0_LPCG, 16, 0, },
105 { IMX_CONN_LPCG_ENET1_ROOT_CLK, "enet1_ipg_root_clk", "enet1_clk", 0, CONN_ENET_1_LPCG, 0, 0, },
106 { IMX_CONN_LPCG_ENET1_TX_CLK, "enet1_tx_clk", "enet1_clk", 0, CONN_ENET_1_LPCG, 4, 0, },
107 { IMX_CONN_LPCG_ENET1_AHB_CLK, "enet1_ahb_clk", "conn_axi_clk_root", 0, CONN_ENET_1_LPCG, 8, 0, },
108 { IMX_CONN_LPCG_ENET1_IPG_S_CLK, "enet1_ipg_s_clk", "conn_ipg_clk_root", 0, CONN_ENET_1_LPCG, 20, 0, },
109 { IMX_CONN_LPCG_ENET1_IPG_CLK, "enet1_ipg_clk", "enet0_ipg_s_clk", 0, CONN_ENET_1_LPCG, 16, 0, },
110 };
111
112 static const struct imx8qxp_ss_lpcg imx8qxp_ss_conn = {
113 .lpcg = imx8qxp_lpcg_conn,
114 .num_lpcg = ARRAY_SIZE(imx8qxp_lpcg_conn),
115 .num_max = IMX_CONN_LPCG_CLK_END,
116 };
117
118 static const struct imx8qxp_lpcg_data imx8qxp_lpcg_lsio[] = {
119 { IMX_LSIO_LPCG_PWM0_IPG_CLK, "pwm0_lpcg_ipg_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 0, 0, },
120 { IMX_LSIO_LPCG_PWM0_IPG_HF_CLK, "pwm0_lpcg_ipg_hf_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 4, 0, },
121 { IMX_LSIO_LPCG_PWM0_IPG_S_CLK, "pwm0_lpcg_ipg_s_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 16, 0, },
122 { IMX_LSIO_LPCG_PWM0_IPG_SLV_CLK, "pwm0_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_0_LPCG, 20, 0, },
123 { IMX_LSIO_LPCG_PWM0_IPG_MSTR_CLK, "pwm0_lpcg_ipg_mstr_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 24, 0, },
124 { IMX_LSIO_LPCG_PWM1_IPG_CLK, "pwm1_lpcg_ipg_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 0, 0, },
125 { IMX_LSIO_LPCG_PWM1_IPG_HF_CLK, "pwm1_lpcg_ipg_hf_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 4, 0, },
126 { IMX_LSIO_LPCG_PWM1_IPG_S_CLK, "pwm1_lpcg_ipg_s_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 16, 0, },
127 { IMX_LSIO_LPCG_PWM1_IPG_SLV_CLK, "pwm1_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_1_LPCG, 20, 0, },
128 { IMX_LSIO_LPCG_PWM1_IPG_MSTR_CLK, "pwm1_lpcg_ipg_mstr_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 24, 0, },
129 { IMX_LSIO_LPCG_PWM2_IPG_CLK, "pwm2_lpcg_ipg_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 0, 0, },
130 { IMX_LSIO_LPCG_PWM2_IPG_HF_CLK, "pwm2_lpcg_ipg_hf_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 4, 0, },
131 { IMX_LSIO_LPCG_PWM2_IPG_S_CLK, "pwm2_lpcg_ipg_s_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 16, 0, },
132 { IMX_LSIO_LPCG_PWM2_IPG_SLV_CLK, "pwm2_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_2_LPCG, 20, 0, },
133 { IMX_LSIO_LPCG_PWM2_IPG_MSTR_CLK, "pwm2_lpcg_ipg_mstr_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 24, 0, },
134 { IMX_LSIO_LPCG_PWM3_IPG_CLK, "pwm3_lpcg_ipg_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 0, 0, },
135 { IMX_LSIO_LPCG_PWM3_IPG_HF_CLK, "pwm3_lpcg_ipg_hf_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 4, 0, },
136 { IMX_LSIO_LPCG_PWM3_IPG_S_CLK, "pwm3_lpcg_ipg_s_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 16, 0, },
137 { IMX_LSIO_LPCG_PWM3_IPG_SLV_CLK, "pwm3_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_3_LPCG, 20, 0, },
138 { IMX_LSIO_LPCG_PWM3_IPG_MSTR_CLK, "pwm3_lpcg_ipg_mstr_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 24, 0, },
139 { IMX_LSIO_LPCG_PWM4_IPG_CLK, "pwm4_lpcg_ipg_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 0, 0, },
140 { IMX_LSIO_LPCG_PWM4_IPG_HF_CLK, "pwm4_lpcg_ipg_hf_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 4, 0, },
141 { IMX_LSIO_LPCG_PWM4_IPG_S_CLK, "pwm4_lpcg_ipg_s_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 16, 0, },
142 { IMX_LSIO_LPCG_PWM4_IPG_SLV_CLK, "pwm4_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_4_LPCG, 20, 0, },
143 { IMX_LSIO_LPCG_PWM4_IPG_MSTR_CLK, "pwm4_lpcg_ipg_mstr_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 24, 0, },
144 { IMX_LSIO_LPCG_PWM5_IPG_CLK, "pwm5_lpcg_ipg_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 0, 0, },
145 { IMX_LSIO_LPCG_PWM5_IPG_HF_CLK, "pwm5_lpcg_ipg_hf_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 4, 0, },
146 { IMX_LSIO_LPCG_PWM5_IPG_S_CLK, "pwm5_lpcg_ipg_s_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 16, 0, },
147 { IMX_LSIO_LPCG_PWM5_IPG_SLV_CLK, "pwm5_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_5_LPCG, 20, 0, },
148 { IMX_LSIO_LPCG_PWM5_IPG_MSTR_CLK, "pwm5_lpcg_ipg_mstr_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 24, 0, },
149 { IMX_LSIO_LPCG_PWM6_IPG_CLK, "pwm6_lpcg_ipg_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 0, 0, },
150 { IMX_LSIO_LPCG_PWM6_IPG_HF_CLK, "pwm6_lpcg_ipg_hf_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 4, 0, },
151 { IMX_LSIO_LPCG_PWM6_IPG_S_CLK, "pwm6_lpcg_ipg_s_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 16, 0, },
152 { IMX_LSIO_LPCG_PWM6_IPG_SLV_CLK, "pwm6_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_6_LPCG, 20, 0, },
153 { IMX_LSIO_LPCG_PWM6_IPG_MSTR_CLK, "pwm6_lpcg_ipg_mstr_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 24, 0, },
154 };
155
156 static const struct imx8qxp_ss_lpcg imx8qxp_ss_lsio = {
157 .lpcg = imx8qxp_lpcg_lsio,
158 .num_lpcg = ARRAY_SIZE(imx8qxp_lpcg_lsio),
159 .num_max = IMX_LSIO_LPCG_CLK_END,
160 };
161
162 #define IMX_LPCG_MAX_CLKS 8
163
imx_lpcg_of_clk_src_get(struct of_phandle_args * clkspec,void * data)164 static struct clk_hw *imx_lpcg_of_clk_src_get(struct of_phandle_args *clkspec,
165 void *data)
166 {
167 struct clk_hw_onecell_data *hw_data = data;
168 unsigned int idx = clkspec->args[0] / 4;
169
170 if (idx >= hw_data->num) {
171 pr_err("%s: invalid index %u\n", __func__, idx);
172 return ERR_PTR(-EINVAL);
173 }
174
175 return hw_data->hws[idx];
176 }
177
imx_lpcg_parse_clks_from_dt(struct platform_device * pdev,struct device_node * np)178 static int imx_lpcg_parse_clks_from_dt(struct platform_device *pdev,
179 struct device_node *np)
180 {
181 const char *output_names[IMX_LPCG_MAX_CLKS];
182 const char *parent_names[IMX_LPCG_MAX_CLKS];
183 unsigned int bit_offset[IMX_LPCG_MAX_CLKS];
184 struct clk_hw_onecell_data *clk_data;
185 struct clk_hw **clk_hws;
186 struct resource *res;
187 void __iomem *base;
188 int count;
189 int idx;
190 int ret;
191 int i;
192
193 if (!of_device_is_compatible(np, "fsl,imx8qxp-lpcg"))
194 return -EINVAL;
195
196 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
197 base = devm_ioremap_resource(&pdev->dev, res);
198 if (IS_ERR(base))
199 return PTR_ERR(base);
200
201 count = of_property_count_u32_elems(np, "clock-indices");
202 if (count < 0) {
203 dev_err(&pdev->dev, "failed to count clocks\n");
204 return -EINVAL;
205 }
206
207 /*
208 * A trick here is that we set the num of clks to the MAX instead
209 * of the count from clock-indices because one LPCG supports up to
210 * 8 clock outputs which each of them is fixed to 4 bits. Then we can
211 * easily get the clock by clk-indices (bit-offset) / 4.
212 * And the cost is very limited few pointers.
213 */
214
215 clk_data = devm_kzalloc(&pdev->dev, struct_size(clk_data, hws,
216 IMX_LPCG_MAX_CLKS), GFP_KERNEL);
217 if (!clk_data)
218 return -ENOMEM;
219
220 clk_data->num = IMX_LPCG_MAX_CLKS;
221 clk_hws = clk_data->hws;
222
223 ret = of_property_read_u32_array(np, "clock-indices", bit_offset,
224 count);
225 if (ret < 0) {
226 dev_err(&pdev->dev, "failed to read clock-indices\n");
227 return -EINVAL;
228 }
229
230 ret = of_clk_parent_fill(np, parent_names, count);
231 if (ret != count) {
232 dev_err(&pdev->dev, "failed to get clock parent names\n");
233 return count;
234 }
235
236 ret = of_property_read_string_array(np, "clock-output-names",
237 output_names, count);
238 if (ret != count) {
239 dev_err(&pdev->dev, "failed to read clock-output-names\n");
240 return -EINVAL;
241 }
242
243 pm_runtime_get_noresume(&pdev->dev);
244 pm_runtime_set_active(&pdev->dev);
245 pm_runtime_set_autosuspend_delay(&pdev->dev, 500);
246 pm_runtime_use_autosuspend(&pdev->dev);
247 pm_runtime_enable(&pdev->dev);
248
249 for (i = 0; i < count; i++) {
250 idx = bit_offset[i] / 4;
251 if (idx >= IMX_LPCG_MAX_CLKS) {
252 dev_warn(&pdev->dev, "invalid bit offset of clock %d\n",
253 i);
254 ret = -EINVAL;
255 goto unreg;
256 }
257
258 clk_hws[idx] = imx_clk_lpcg_scu_dev(&pdev->dev, output_names[i],
259 parent_names[i], 0, base,
260 bit_offset[i], false);
261 if (IS_ERR(clk_hws[idx])) {
262 dev_warn(&pdev->dev, "failed to register clock %d\n",
263 idx);
264 ret = PTR_ERR(clk_hws[idx]);
265 goto unreg;
266 }
267 }
268
269 ret = devm_of_clk_add_hw_provider(&pdev->dev, imx_lpcg_of_clk_src_get,
270 clk_data);
271 if (ret)
272 goto unreg;
273
274 pm_runtime_mark_last_busy(&pdev->dev);
275 pm_runtime_put_autosuspend(&pdev->dev);
276
277 return 0;
278
279 unreg:
280 while (--i >= 0) {
281 idx = bit_offset[i] / 4;
282 if (clk_hws[idx])
283 imx_clk_lpcg_scu_unregister(clk_hws[idx]);
284 }
285
286 pm_runtime_disable(&pdev->dev);
287
288 return ret;
289 }
290
imx8qxp_lpcg_clk_probe(struct platform_device * pdev)291 static int imx8qxp_lpcg_clk_probe(struct platform_device *pdev)
292 {
293 struct device *dev = &pdev->dev;
294 struct device_node *np = dev->of_node;
295 struct clk_hw_onecell_data *clk_data;
296 const struct imx8qxp_ss_lpcg *ss_lpcg;
297 const struct imx8qxp_lpcg_data *lpcg;
298 struct resource *res;
299 struct clk_hw **clks;
300 void __iomem *base;
301 int ret;
302 int i;
303
304 /* try new binding to parse clocks from device tree first */
305 ret = imx_lpcg_parse_clks_from_dt(pdev, np);
306 if (!ret)
307 return 0;
308
309 ss_lpcg = of_device_get_match_data(dev);
310 if (!ss_lpcg)
311 return -ENODEV;
312
313 /*
314 * Please don't replace this with devm_platform_ioremap_resource.
315 *
316 * devm_platform_ioremap_resource calls devm_ioremap_resource which
317 * differs from devm_ioremap by also calling devm_request_mem_region
318 * and preventing other mappings in the same area.
319 *
320 * On imx8 the LPCG nodes map entire subsystems and overlap
321 * peripherals, this means that using devm_platform_ioremap_resource
322 * will cause many devices to fail to probe including serial ports.
323 */
324 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
325 if (!res)
326 return -EINVAL;
327 base = devm_ioremap(dev, res->start, resource_size(res));
328 if (!base)
329 return -ENOMEM;
330
331 clk_data = devm_kzalloc(&pdev->dev, struct_size(clk_data, hws,
332 ss_lpcg->num_max), GFP_KERNEL);
333 if (!clk_data)
334 return -ENOMEM;
335
336 clk_data->num = ss_lpcg->num_max;
337 clks = clk_data->hws;
338
339 for (i = 0; i < ss_lpcg->num_lpcg; i++) {
340 lpcg = ss_lpcg->lpcg + i;
341 clks[lpcg->id] = imx_clk_lpcg_scu(lpcg->name, lpcg->parent,
342 lpcg->flags, base + lpcg->offset,
343 lpcg->bit_idx, lpcg->hw_gate);
344 }
345
346 for (i = 0; i < clk_data->num; i++) {
347 if (IS_ERR(clks[i]))
348 pr_warn("i.MX clk %u: register failed with %ld\n",
349 i, PTR_ERR(clks[i]));
350 }
351
352 return of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data);
353 }
354
355 static const struct of_device_id imx8qxp_lpcg_match[] = {
356 { .compatible = "fsl,imx8qxp-lpcg-adma", &imx8qxp_ss_adma, },
357 { .compatible = "fsl,imx8qxp-lpcg-conn", &imx8qxp_ss_conn, },
358 { .compatible = "fsl,imx8qxp-lpcg-lsio", &imx8qxp_ss_lsio, },
359 { .compatible = "fsl,imx8qxp-lpcg", NULL },
360 { /* sentinel */ }
361 };
362
363 static struct platform_driver imx8qxp_lpcg_clk_driver = {
364 .driver = {
365 .name = "imx8qxp-lpcg-clk",
366 .of_match_table = imx8qxp_lpcg_match,
367 .pm = &imx_clk_lpcg_scu_pm_ops,
368 .suppress_bind_attrs = true,
369 },
370 .probe = imx8qxp_lpcg_clk_probe,
371 };
372
373 module_platform_driver(imx8qxp_lpcg_clk_driver);
374
375 MODULE_AUTHOR("Aisheng Dong <aisheng.dong@nxp.com>");
376 MODULE_DESCRIPTION("NXP i.MX8QXP LPCG clock driver");
377 MODULE_LICENSE("GPL v2");
378