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 */
33struct 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 */
52struct imx8qxp_ss_lpcg {
53 const struct imx8qxp_lpcg_data *lpcg;
54 u8 num_lpcg;
55 u8 num_max;
56};
57
58static 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
82static 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
88static 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
110static 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
116static 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
154static 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
162static 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(error: -EINVAL);
171 }
172
173 return hw_data->hws[idx];
174}
175
176static 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(device: np, "fsl,imx8qxp-lpcg"))
191 return -EINVAL;
192
193 base = devm_platform_ioremap_resource(pdev, index: 0);
194 if (IS_ERR(ptr: base))
195 return PTR_ERR(ptr: base);
196
197 count = of_property_count_u32_elems(np, propname: "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(dev: &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, propname: "clock-indices", out_values: bit_offset,
220 sz: 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, parents: parent_names, size: 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, propname: "clock-output-names",
233 out_strs: output_names, sz: 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(dev: &pdev->dev);
240 pm_runtime_set_active(dev: &pdev->dev);
241 pm_runtime_set_autosuspend_delay(dev: &pdev->dev, delay: 500);
242 pm_runtime_use_autosuspend(dev: &pdev->dev);
243 pm_runtime_enable(dev: &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(dev: &pdev->dev, name: output_names[i],
255 parent_name: parent_names[i], flags: 0, reg: base,
256 bit_idx: bit_offset[i], hw_gate: false);
257 if (IS_ERR(ptr: clk_hws[idx])) {
258 dev_warn(&pdev->dev, "failed to register clock %d\n",
259 idx);
260 ret = PTR_ERR(ptr: clk_hws[idx]);
261 goto unreg;
262 }
263 }
264
265 ret = devm_of_clk_add_hw_provider(dev: &pdev->dev, get: imx_lpcg_of_clk_src_get,
266 data: clk_data);
267 if (ret)
268 goto unreg;
269
270 pm_runtime_mark_last_busy(dev: &pdev->dev);
271 pm_runtime_put_autosuspend(dev: &pdev->dev);
272
273 return 0;
274
275unreg:
276 while (--i >= 0) {
277 idx = bit_offset[i] / 4;
278 if (clk_hws[idx])
279 imx_clk_lpcg_scu_unregister(hw: clk_hws[idx]);
280 }
281
282 pm_runtime_disable(dev: &pdev->dev);
283
284 return ret;
285}
286
287static 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, offset: res->start, size: resource_size(res));
324 if (!base)
325 return -ENOMEM;
326
327 clk_data = devm_kzalloc(dev: &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(name: lpcg->name, parent_name: lpcg->parent,
338 flags: lpcg->flags, reg: base + lpcg->offset,
339 bit_idx: lpcg->bit_idx, hw_gate: lpcg->hw_gate);
340 }
341
342 for (i = 0; i < clk_data->num; i++) {
343 if (IS_ERR(ptr: 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, get: of_clk_hw_onecell_get, data: clk_data);
349}
350
351static 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
359static 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
369module_platform_driver(imx8qxp_lpcg_clk_driver);
370
371MODULE_AUTHOR("Aisheng Dong <aisheng.dong@nxp.com>");
372MODULE_DESCRIPTION("NXP i.MX8QXP LPCG clock driver");
373MODULE_LICENSE("GPL v2");
374

source code of linux/drivers/clk/imx/clk-imx8qxp-lpcg.c