drivers: cpufreq: Support H616
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orangepi-xunlong
parent
f9660829b4
commit
1dc411a145
@ -102,6 +102,7 @@ static const struct of_device_id allowlist[] __initconst = {
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*/
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static const struct of_device_id blocklist[] __initconst = {
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{ .compatible = "allwinner,sun50i-h6", },
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{ .compatible = "allwinner,sun50i-h616", },
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{ .compatible = "arm,vexpress", },
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@ -19,25 +19,62 @@
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#define MAX_NAME_LEN 7
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#define NVMEM_MASK 0x7
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#define NVMEM_SHIFT 5
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#define SUN50I_H616_NVMEM_MASK 0x22
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#define SUN50I_H616_NVMEM_SHIFT 5
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#define SUN50I_H6_NVMEM_MASK 0x7
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#define SUN50I_H6_NVMEM_SHIFT 5
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struct sunxi_cpufreq_soc_data {
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u32 (*efuse_xlate) (void *efuse);
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};
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static struct platform_device *cpufreq_dt_pdev, *sun50i_cpufreq_pdev;
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static u32 sun50i_h616_efuse_xlate(void *efuse)
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{
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u32 efuse_value = (*(u32 *)efuse >> SUN50I_H616_NVMEM_SHIFT) &
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SUN50I_H616_NVMEM_MASK;
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/* Tested as h616 soc. Expected efuse values are 1 -3,
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slowest to fastest */
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if (efuse_value >=1 && efuse_value <= 3)
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return efuse_value - 1;
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else
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return 0;
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};
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static u32 sun50i_h6_efuse_xlate(void *efuse)
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{
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u32 efuse_value = (*(u32 *)efuse >> SUN50I_H6_NVMEM_SHIFT) &
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SUN50I_H6_NVMEM_MASK;
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/*
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* We treat unexpected efuse values as if the SoC was from
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* the slowest bin. Expected efuse values are 1 -3, slowest
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* to fastest.
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*/
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if (efuse_value >= 1 && efuse_value <= 3)
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return efuse_value - 1;
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else
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return 0;
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};
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/**
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* sun50i_cpufreq_get_efuse() - Determine speed grade from efuse value
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* @soc_data: pointer to sunxi_cpufreq_soc_data context
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* @versions: Set to the value parsed from efuse
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*
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* Returns 0 if success.
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*/
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static int sun50i_cpufreq_get_efuse(u32 *versions)
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static int sun50i_cpufreq_get_efuse(const struct sunxi_cpufreq_soc_data *soc_data,
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u32 *versions)
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{
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struct nvmem_cell *speedbin_nvmem;
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struct device_node *np;
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struct device *cpu_dev;
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u32 *speedbin, efuse_value;
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u32 *speedbin;
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size_t len;
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int ret;
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cpu_dev = get_cpu_device(0);
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if (!cpu_dev)
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@ -47,9 +84,9 @@ static int sun50i_cpufreq_get_efuse(u32 *versions)
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if (!np)
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return -ENOENT;
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ret = of_device_is_compatible(np,
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"allwinner,sun50i-h6-operating-points");
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if (!ret) {
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if (of_device_is_compatible(np, "allwinner,sun50i-h6-operating-points")) {}
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else if (of_device_is_compatible(np, "allwinner,sun50i-h616-operating-points")) {}
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else {
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of_node_put(np);
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return -ENOENT;
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}
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@ -65,17 +102,7 @@ static int sun50i_cpufreq_get_efuse(u32 *versions)
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if (IS_ERR(speedbin))
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return PTR_ERR(speedbin);
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efuse_value = (*speedbin >> NVMEM_SHIFT) & NVMEM_MASK;
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/*
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* We treat unexpected efuse values as if the SoC was from
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* the slowest bin. Expected efuse values are 1-3, slowest
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* to fastest.
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*/
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if (efuse_value >= 1 && efuse_value <= 3)
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*versions = efuse_value - 1;
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else
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*versions = 0;
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*versions = soc_data->efuse_xlate(speedbin);
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kfree(speedbin);
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return 0;
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@ -83,23 +110,31 @@ static int sun50i_cpufreq_get_efuse(u32 *versions)
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static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
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{
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int *opp_tokens;
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const struct of_device_id *match;
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struct opp_table **opp_tables;
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char name[MAX_NAME_LEN];
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unsigned int cpu;
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u32 speed = 0;
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int ret;
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opp_tokens = kcalloc(num_possible_cpus(), sizeof(*opp_tokens),
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match = dev_get_platdata(&pdev->dev);
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if (!match) {
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return -EINVAL;
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}
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opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables),
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GFP_KERNEL);
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if (!opp_tokens)
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if (!opp_tables)
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return -ENOMEM;
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ret = sun50i_cpufreq_get_efuse(&speed);
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ret = sun50i_cpufreq_get_efuse(match->data, &speed);
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if (ret) {
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kfree(opp_tokens);
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kfree(opp_tables);
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return ret;
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}
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printk("sun50i-cpufreq-nvmem: will use speed%d CPU OPPs\n", speed);
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snprintf(name, MAX_NAME_LEN, "speed%d", speed);
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for_each_possible_cpu(cpu) {
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@ -110,9 +145,9 @@ static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
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goto free_opp;
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}
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opp_tokens[cpu] = dev_pm_opp_set_prop_name(cpu_dev, name);
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if (opp_tokens[cpu] < 0) {
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ret = opp_tokens[cpu];
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opp_tables[cpu] = dev_pm_opp_set_prop_name(cpu_dev, name);
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if (opp_tables[cpu] < 0) {
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ret = opp_tables[cpu];
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pr_err("Failed to set prop name\n");
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goto free_opp;
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}
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@ -121,7 +156,7 @@ static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
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cpufreq_dt_pdev = platform_device_register_simple("cpufreq-dt", -1,
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NULL, 0);
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if (!IS_ERR(cpufreq_dt_pdev)) {
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platform_set_drvdata(pdev, opp_tokens);
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platform_set_drvdata(pdev, opp_tables);
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return 0;
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}
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@ -130,23 +165,23 @@ static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev)
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free_opp:
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for_each_possible_cpu(cpu)
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dev_pm_opp_put_prop_name(opp_tokens[cpu]);
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kfree(opp_tokens);
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dev_pm_opp_put_prop_name(opp_tables[cpu]);
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kfree(opp_tables);
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return ret;
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}
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static int sun50i_cpufreq_nvmem_remove(struct platform_device *pdev)
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{
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int *opp_tokens = platform_get_drvdata(pdev);
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int *opp_tables = platform_get_drvdata(pdev);
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unsigned int cpu;
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platform_device_unregister(cpufreq_dt_pdev);
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for_each_possible_cpu(cpu)
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dev_pm_opp_put_prop_name(opp_tokens[cpu]);
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dev_pm_opp_put_prop_name(opp_tables[cpu]);
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kfree(opp_tokens);
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kfree(opp_tables);
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return 0;
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}
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@ -159,8 +194,17 @@ static struct platform_driver sun50i_cpufreq_driver = {
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},
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};
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static const struct sunxi_cpufreq_soc_data sun50i_h616_data = {
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.efuse_xlate = sun50i_h616_efuse_xlate,
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};
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static const struct sunxi_cpufreq_soc_data sun50i_h6_data = {
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.efuse_xlate = sun50i_h6_efuse_xlate,
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};
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static const struct of_device_id sun50i_cpufreq_match_list[] = {
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{ .compatible = "allwinner,sun50i-h6" },
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{ .compatible = "allwinner,sun50i-h6", .data = &sun50i_h6_data },
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{ .compatible = "allwinner,sun50i-h616", .data = &sun50i_h616_data },
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{}
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};
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MODULE_DEVICE_TABLE(of, sun50i_cpufreq_match_list);
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@ -195,9 +239,8 @@ static int __init sun50i_cpufreq_init(void)
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if (unlikely(ret < 0))
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return ret;
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sun50i_cpufreq_pdev =
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platform_device_register_simple("sun50i-cpufreq-nvmem",
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-1, NULL, 0);
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sun50i_cpufreq_pdev = platform_device_register_data(NULL,
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"sun50i-cpufreq-nvmem", -1, match, sizeof(*match));
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ret = PTR_ERR_OR_ZERO(sun50i_cpufreq_pdev);
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if (ret == 0)
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return 0;
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