1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de> 4 */ 5 /* 6 * infrastructure for devices connected via I2C 7 */ 8 9 #include <linux/slab.h> 10 #include "via_aux.h" 11 12 via_aux_probe(struct i2c_adapter * adap)13struct via_aux_bus *via_aux_probe(struct i2c_adapter *adap) 14 { 15 struct via_aux_bus *bus; 16 17 if (!adap) 18 return NULL; 19 20 bus = kmalloc(sizeof(*bus), GFP_KERNEL); 21 if (!bus) 22 return NULL; 23 24 bus->adap = adap; 25 INIT_LIST_HEAD(&bus->drivers); 26 27 via_aux_edid_probe(bus); 28 via_aux_vt1636_probe(bus); 29 via_aux_vt1632_probe(bus); 30 via_aux_vt1631_probe(bus); 31 via_aux_vt1625_probe(bus); 32 via_aux_vt1622_probe(bus); 33 via_aux_vt1621_probe(bus); 34 via_aux_sii164_probe(bus); 35 via_aux_ch7301_probe(bus); 36 37 return bus; 38 } 39 via_aux_free(struct via_aux_bus * bus)40void via_aux_free(struct via_aux_bus *bus) 41 { 42 struct via_aux_drv *pos, *n; 43 44 if (!bus) 45 return; 46 47 list_for_each_entry_safe(pos, n, &bus->drivers, chain) { 48 if (pos->cleanup) 49 pos->cleanup(pos); 50 51 list_del(&pos->chain); 52 kfree(pos->data); 53 kfree(pos); 54 } 55 56 kfree(bus); 57 } 58 via_aux_get_preferred_mode(struct via_aux_bus * bus)59const struct fb_videomode *via_aux_get_preferred_mode(struct via_aux_bus *bus) 60 { 61 struct via_aux_drv *pos; 62 const struct fb_videomode *mode = NULL; 63 64 if (!bus) 65 return NULL; 66 67 list_for_each_entry(pos, &bus->drivers, chain) { 68 if (pos->get_preferred_mode) 69 mode = pos->get_preferred_mode(pos); 70 } 71 72 return mode; 73 } 74