1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Core driver for Renesas Synchronization Management Unit (SMU) devices. 4 * 5 * Copyright (C) 2021 Integrated Device Technology, Inc., a Renesas Company. 6 */ 7 8 #include <linux/init.h> 9 #include <linux/kernel.h> 10 #include <linux/mfd/core.h> 11 #include <linux/mfd/rsmu.h> 12 #include <linux/module.h> 13 #include <linux/of.h> 14 #include <linux/regmap.h> 15 #include <linux/slab.h> 16 17 #include "rsmu.h" 18 19 enum { 20 RSMU_PHC = 0, 21 RSMU_CDEV = 1, 22 RSMU_N_DEVS = 2, 23 }; 24 25 static struct mfd_cell rsmu_cm_devs[] = { 26 [RSMU_PHC] = { 27 .name = "8a3400x-phc", 28 }, 29 [RSMU_CDEV] = { 30 .name = "8a3400x-cdev", 31 }, 32 }; 33 34 static struct mfd_cell rsmu_sabre_devs[] = { 35 [RSMU_PHC] = { 36 .name = "82p33x1x-phc", 37 }, 38 [RSMU_CDEV] = { 39 .name = "82p33x1x-cdev", 40 }, 41 }; 42 43 static struct mfd_cell rsmu_sl_devs[] = { 44 [RSMU_PHC] = { 45 .name = "8v19n85x-phc", 46 }, 47 [RSMU_CDEV] = { 48 .name = "8v19n85x-cdev", 49 }, 50 }; 51 52 int rsmu_core_init(struct rsmu_ddata *rsmu) 53 { 54 struct mfd_cell *cells; 55 int ret; 56 57 switch (rsmu->type) { 58 case RSMU_CM: 59 cells = rsmu_cm_devs; 60 break; 61 case RSMU_SABRE: 62 cells = rsmu_sabre_devs; 63 break; 64 case RSMU_SL: 65 cells = rsmu_sl_devs; 66 break; 67 default: 68 dev_err(rsmu->dev, "Unsupported RSMU device type: %d\n", rsmu->type); 69 return -ENODEV; 70 } 71 72 mutex_init(&rsmu->lock); 73 74 ret = devm_mfd_add_devices(rsmu->dev, PLATFORM_DEVID_AUTO, cells, 75 RSMU_N_DEVS, NULL, 0, NULL); 76 if (ret < 0) 77 dev_err(rsmu->dev, "Failed to register sub-devices: %d\n", ret); 78 79 return ret; 80 } 81 EXPORT_SYMBOL_GPL(rsmu_core_init); 82 83 void rsmu_core_exit(struct rsmu_ddata *rsmu) 84 { 85 mutex_destroy(&rsmu->lock); 86 } 87 EXPORT_SYMBOL_GPL(rsmu_core_exit); 88 89 MODULE_DESCRIPTION("Renesas SMU core driver"); 90 MODULE_LICENSE("GPL"); 91