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
113 	rngdev = devm_kzalloc(&dev->dev, sizeof(*rngdev), GFP_KERNEL);  in tx4939_rng_probe()
114 	if (!rngdev)  in tx4939_rng_probe()
117 	rngdev->base = devm_ioremap_resource(&dev->dev, r);  in tx4939_rng_probe()
118 	if (IS_ERR(rngdev->base))  in tx4939_rng_probe()
119 		return PTR_ERR(rngdev->base);  in tx4939_rng_probe()
121 	rngdev->rng.name = dev_name(&dev->dev);  in tx4939_rng_probe()
122 	rngdev->rng.data_present = tx4939_rng_data_present;  in tx4939_rng_probe()
123 	rngdev->rng.data_read = tx4939_rng_data_read;  in tx4939_rng_probe()
127 	write_rng(TX4939_RNG_RCSR_RST, rngdev->base, TX4939_RNG_RCSR);  in tx4939_rng_probe()
128 	write_rng(0, rngdev->base, TX4939_RNG_RCSR);  in tx4939_rng_probe()
130 	write_rng(TX4939_RNG_RCSR_ST, rngdev->base, TX4939_RNG_RCSR);  in tx4939_rng_probe()
141 		rngdev->data_avail = 0;  in tx4939_rng_probe()
142 		if (!tx4939_rng_data_present(&rngdev->rng, 1))  in tx4939_rng_probe()
146 	platform_set_drvdata(dev, rngdev);  in tx4939_rng_probe()
147 	return hwrng_register(&rngdev->rng);  in tx4939_rng_probe()
152 	struct tx4939_rng *rngdev = platform_get_drvdata(dev);  in tx4939_rng_remove()  local
154 	hwrng_unregister(&rngdev->rng);  in tx4939_rng_remove()