20 #include <asm/octeon/cvmx-rnm-defs.h>
28 static int octeon_rng_init(struct hwrng *rng)  in octeon_rng_init()  argument
31 	struct octeon_rng *p = container_of(rng, struct octeon_rng, ops);  in octeon_rng_init()
35 	ctl.s.rng_en = 1; /* Enable the RNG hardware.  */  in octeon_rng_init()
36 	cvmx_write_csr((unsigned long)p->control_status, ctl.u64);  in octeon_rng_init()
40 static void octeon_rng_cleanup(struct hwrng *rng)  in octeon_rng_cleanup()  argument
43 	struct octeon_rng *p = container_of(rng, struct octeon_rng, ops);  in octeon_rng_cleanup()
47 	cvmx_write_csr((unsigned long)p->control_status, ctl.u64);  in octeon_rng_cleanup()
50 static int octeon_rng_data_read(struct hwrng *rng, u32 *data)  in octeon_rng_data_read()  argument
52 	struct octeon_rng *p = container_of(rng, struct octeon_rng, ops);  in octeon_rng_data_read()
54 	*data = cvmx_read64_uint32((unsigned long)p->result);  in octeon_rng_data_read()
62 	struct octeon_rng *rng;  in octeon_rng_probe()  local
71 	rng = devm_kzalloc(&pdev->dev, sizeof(*rng), GFP_KERNEL);  in octeon_rng_probe()
72 	if (!rng)  in octeon_rng_probe()
73 		return -ENOMEM;  in octeon_rng_probe()
77 		return -ENOENT;  in octeon_rng_probe()
81 		return -ENOENT;  in octeon_rng_probe()
84 	rng->control_status = devm_ioremap(&pdev->dev,  in octeon_rng_probe()
85 						   res_ports->start,  in octeon_rng_probe()
87 	if (!rng->control_status)  in octeon_rng_probe()
88 		return -ENOENT;  in octeon_rng_probe()
90 	rng->result = devm_ioremap(&pdev->dev,  in octeon_rng_probe()
91 					   res_result->start,  in octeon_rng_probe()
93 	if (!rng->result)  in octeon_rng_probe()
94 		return -ENOENT;  in octeon_rng_probe()
96 	rng->ops = ops;  in octeon_rng_probe()
98 	platform_set_drvdata(pdev, &rng->ops);  in octeon_rng_probe()
99 	ret = devm_hwrng_register(&pdev->dev, &rng->ops);  in octeon_rng_probe()
101 		return -ENOENT;  in octeon_rng_probe()
103 	dev_info(&pdev->dev, "Octeon Random Number Generator\n");  in octeon_rng_probe()