67 	struct tx4939_rng *rngdev = container_of(rng, struct tx4939_rng, rng);  in tx4939_rng_data_present()  local
70 	if (rngdev->data_avail)  in tx4939_rng_data_present()
71 		return rngdev->data_avail;  in tx4939_rng_data_present()
74 		if (!(read_rng(rngdev->base, TX4939_RNG_RCSR)  in tx4939_rng_data_present()
76 			rngdev->databuf[0] =  in tx4939_rng_data_present()
77 				read_rng(rngdev->base, TX4939_RNG_ROR(0));  in tx4939_rng_data_present()
78 			rngdev->databuf[1] =  in tx4939_rng_data_present()
79 				read_rng(rngdev->base, TX4939_RNG_ROR(1));  in tx4939_rng_data_present()
80 			rngdev->databuf[2] =  in tx4939_rng_data_present()
81 				read_rng(rngdev->base, TX4939_RNG_ROR(2));  in tx4939_rng_data_present()
82 			rngdev->data_avail =  in tx4939_rng_data_present()
83 				sizeof(rngdev->databuf) / sizeof(u32);  in tx4939_rng_data_present()
86 				  rngdev->base, TX4939_RNG_RCSR);  in tx4939_rng_data_present()
95 	return rngdev->data_avail;  in tx4939_rng_data_present()
100 	struct tx4939_rng *rngdev = container_of(rng, struct tx4939_rng, rng);  in tx4939_rng_data_read()  local
102 	rngdev->data_avail--;  in tx4939_rng_data_read()
103 	*buffer = *((u32 *)&rngdev->databuf + rngdev->data_avail);  in tx4939_rng_data_read()
109 	struct tx4939_rng *rngdev;  in tx4939_rng_probe()  local
112 	rngdev = devm_kzalloc(&dev->dev, sizeof(*rngdev), GFP_KERNEL);  in tx4939_rng_probe()
113 	if (!rngdev)  in tx4939_rng_probe()
115 	rngdev->base = devm_platform_ioremap_resource(dev, 0);  in tx4939_rng_probe()
116 	if (IS_ERR(rngdev->base))  in tx4939_rng_probe()
117 		return PTR_ERR(rngdev->base);  in tx4939_rng_probe()
119 	rngdev->rng.name = dev_name(&dev->dev);  in tx4939_rng_probe()
120 	rngdev->rng.data_present = tx4939_rng_data_present;  in tx4939_rng_probe()
121 	rngdev->rng.data_read = tx4939_rng_data_read;  in tx4939_rng_probe()
125 	write_rng(TX4939_RNG_RCSR_RST, rngdev->base, TX4939_RNG_RCSR);  in tx4939_rng_probe()
126 	write_rng(0, rngdev->base, TX4939_RNG_RCSR);  in tx4939_rng_probe()
128 	write_rng(TX4939_RNG_RCSR_ST, rngdev->base, TX4939_RNG_RCSR);  in tx4939_rng_probe()
139 		rngdev->data_avail = 0;  in tx4939_rng_probe()
140 		if (!tx4939_rng_data_present(&rngdev->rng, 1))  in tx4939_rng_probe()
144 	platform_set_drvdata(dev, rngdev);  in tx4939_rng_probe()
145 	return devm_hwrng_register(&dev->dev, &rngdev->rng);  in tx4939_rng_probe()