1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2018, The Linux Foundation. All rights reserved. 3 4 #include <linux/kernel.h> 5 #include <linux/init.h> 6 #include <linux/module.h> 7 #include <linux/platform_device.h> 8 #include <linux/err.h> 9 #include <linux/io.h> 10 #include <linux/of.h> 11 #include <linux/clk.h> 12 #include <linux/clk-provider.h> 13 14 static const struct clk_parent_data aux_parents[] = { 15 { .fw_name = "pll8_vote", .name = "pll8_vote" }, 16 { .fw_name = "pxo", .name = "pxo_board" }, 17 }; 18 19 static const u32 aux_parent_map[] = { 20 3, 21 0, 22 }; 23 24 static const struct of_device_id kpss_xcc_match_table[] = { 25 { .compatible = "qcom,kpss-acc-v1", .data = (void *)1UL }, 26 { .compatible = "qcom,kpss-gcc" }, 27 {} 28 }; 29 MODULE_DEVICE_TABLE(of, kpss_xcc_match_table); 30 31 static int kpss_xcc_driver_probe(struct platform_device *pdev) 32 { 33 struct device *dev = &pdev->dev; 34 void __iomem *base; 35 struct clk_hw *hw; 36 const char *name; 37 38 base = devm_platform_ioremap_resource(pdev, 0); 39 if (IS_ERR(base)) 40 return PTR_ERR(base); 41 42 if (device_get_match_data(&pdev->dev)) { 43 if (of_property_read_string_index(dev->of_node, 44 "clock-output-names", 45 0, &name)) 46 return -ENODEV; 47 base += 0x14; 48 } else { 49 name = "acpu_l2_aux"; 50 base += 0x28; 51 } 52 53 hw = devm_clk_hw_register_mux_parent_data_table(dev, name, aux_parents, 54 ARRAY_SIZE(aux_parents), 0, 55 base, 0, 0x3, 56 0, aux_parent_map, NULL); 57 if (IS_ERR(hw)) 58 return PTR_ERR(hw); 59 60 return of_clk_add_hw_provider(dev->of_node, of_clk_hw_simple_get, hw); 61 } 62 63 static struct platform_driver kpss_xcc_driver = { 64 .probe = kpss_xcc_driver_probe, 65 .driver = { 66 .name = "kpss-xcc", 67 .of_match_table = kpss_xcc_match_table, 68 }, 69 }; 70 module_platform_driver(kpss_xcc_driver); 71 72 MODULE_DESCRIPTION("Krait Processor Sub System (KPSS) Clock Driver"); 73 MODULE_LICENSE("GPL v2"); 74 MODULE_ALIAS("platform:kpss-xcc"); 75