1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2017 Google, Inc 4 */ 5 6 #include <common.h> 7 #include <dm.h> 8 #include <wdt.h> 9 #include <asm/state.h> 10 11 static int sandbox_wdt_start(struct udevice *dev, u64 timeout, ulong flags) 12 { 13 struct sandbox_state *state = state_get_current(); 14 15 state->wdt.counter = timeout; 16 state->wdt.running = true; 17 18 return 0; 19 } 20 21 static int sandbox_wdt_stop(struct udevice *dev) 22 { 23 struct sandbox_state *state = state_get_current(); 24 25 state->wdt.running = false; 26 27 return 0; 28 } 29 30 static int sandbox_wdt_reset(struct udevice *dev) 31 { 32 struct sandbox_state *state = state_get_current(); 33 34 state->wdt.reset_count++; 35 36 return 0; 37 } 38 39 static int sandbox_wdt_expire_now(struct udevice *dev, ulong flags) 40 { 41 sandbox_wdt_start(dev, 1, flags); 42 43 return 0; 44 } 45 46 static const struct wdt_ops sandbox_wdt_ops = { 47 .start = sandbox_wdt_start, 48 .reset = sandbox_wdt_reset, 49 .stop = sandbox_wdt_stop, 50 .expire_now = sandbox_wdt_expire_now, 51 }; 52 53 static const struct udevice_id sandbox_wdt_ids[] = { 54 { .compatible = "sandbox,wdt" }, 55 {} 56 }; 57 58 U_BOOT_DRIVER(wdt_sandbox) = { 59 .name = "wdt_sandbox", 60 .id = UCLASS_WDT, 61 .of_match = sandbox_wdt_ids, 62 .ops = &sandbox_wdt_ops, 63 }; 64
