47 static inline u32 ba431_trng_read_reg(struct ba431_trng *ba431, u32 reg)  in ba431_trng_read_reg()  argument
49 	return ioread32(ba431->base + reg);  in ba431_trng_read_reg()
52 static inline void ba431_trng_write_reg(struct ba431_trng *ba431, u32 reg,  in ba431_trng_write_reg()  argument
55 	iowrite32(val, ba431->base + reg);  in ba431_trng_write_reg()
58 static inline enum ba431_state ba431_trng_get_state(struct ba431_trng *ba431)  in ba431_trng_get_state()  argument
60 	u32 status = ba431_trng_read_reg(ba431, BA431_REG_STATUS);  in ba431_trng_get_state()
65 static int ba431_trng_is_in_error(struct ba431_trng *ba431)  in ba431_trng_is_in_error()  argument
67 	enum ba431_state state = ba431_trng_get_state(ba431);  in ba431_trng_is_in_error()
76 static int ba431_trng_reset(struct ba431_trng *ba431)  in ba431_trng_reset()  argument
81 	ba431_trng_write_reg(ba431, BA431_REG_CTRL, BA431_CTRL_SOFTRESET);  in ba431_trng_reset()
83 	ba431_trng_write_reg(ba431, BA431_REG_CTRL, BA431_CTRL_ENABLE);  in ba431_trng_reset()
86 	if (readx_poll_timeout(ba431_trng_is_in_error, ba431, ret, !ret,  in ba431_trng_reset()
89 		dev_err(ba431->dev, "reset failed (state: %d)\n",  in ba431_trng_reset()
90 			ba431_trng_get_state(ba431));  in ba431_trng_reset()
94 	dev_info(ba431->dev, "reset done\n");  in ba431_trng_reset()
101 	struct ba431_trng *ba431 = container_of(work, struct ba431_trng,  in ba431_trng_reset_work()  local
103 	ba431_trng_reset(ba431);  in ba431_trng_reset_work()
104 	atomic_set(&ba431->reset_pending, 0);  in ba431_trng_reset_work()
107 static void ba431_trng_schedule_reset(struct ba431_trng *ba431)  in ba431_trng_schedule_reset()  argument
109 	if (atomic_cmpxchg(&ba431->reset_pending, 0, 1))  in ba431_trng_schedule_reset()
112 	schedule_work(&ba431->reset_work);  in ba431_trng_schedule_reset()
117 	struct ba431_trng *ba431 = container_of(rng, struct ba431_trng, rng);  in ba431_trng_read()  local
123 		level = ba431_trng_read_reg(ba431, BA431_REG_FIFO_LEVEL);  in ba431_trng_read()
125 			if (ba431_trng_is_in_error(ba431)) {  in ba431_trng_read()
126 				ba431_trng_schedule_reset(ba431);  in ba431_trng_read()
139 			data[n++] = ba431_trng_read_reg(ba431,  in ba431_trng_read()
144 		if (ba431_trng_is_in_error(ba431)) {  in ba431_trng_read()
146 			ba431_trng_schedule_reset(ba431);  in ba431_trng_read()
157 	struct ba431_trng *ba431 = container_of(rng, struct ba431_trng, rng);  in ba431_trng_cleanup()  local
159 	ba431_trng_write_reg(ba431, BA431_REG_CTRL, 0);  in ba431_trng_cleanup()
160 	cancel_work_sync(&ba431->reset_work);  in ba431_trng_cleanup()
165 	struct ba431_trng *ba431 = container_of(rng, struct ba431_trng, rng);  in ba431_trng_init()  local
167 	return ba431_trng_reset(ba431);  in ba431_trng_init()
172 	struct ba431_trng *ba431;  in ba431_trng_probe()  local
175 	ba431 = devm_kzalloc(&pdev->dev, sizeof(*ba431), GFP_KERNEL);  in ba431_trng_probe()
176 	if (!ba431)  in ba431_trng_probe()
179 	ba431->dev = &pdev->dev;  in ba431_trng_probe()
181 	ba431->base = devm_platform_ioremap_resource(pdev, 0);  in ba431_trng_probe()
182 	if (IS_ERR(ba431->base))  in ba431_trng_probe()
183 		return PTR_ERR(ba431->base);  in ba431_trng_probe()
185 	atomic_set(&ba431->reset_pending, 0);  in ba431_trng_probe()
186 	INIT_WORK(&ba431->reset_work, ba431_trng_reset_work);  in ba431_trng_probe()
187 	ba431->rng.name = pdev->name;  in ba431_trng_probe()
188 	ba431->rng.init = ba431_trng_init;  in ba431_trng_probe()
189 	ba431->rng.cleanup = ba431_trng_cleanup;  in ba431_trng_probe()
190 	ba431->rng.read = ba431_trng_read;  in ba431_trng_probe()
192 	ret = devm_hwrng_register(&pdev->dev, &ba431->rng);  in ba431_trng_probe()