char/hw_random/omap3-rom-rng.c

39 	struct omap_rom_rng *ddata;
43 	ddata = (struct omap_rom_rng *)rng->priv;
45 	r = pm_runtime_get_sync(ddata->dev);
47 		pm_runtime_put_noidle(ddata->dev);
53 	r = ddata->rom_rng_call(ptr, 4, RNG_GEN_HW);
59 	pm_runtime_mark_last_busy(ddata->dev);
60 	pm_runtime_put_autosuspend(ddata->dev);
67 	struct omap_rom_rng *ddata;
70 	ddata = dev_get_drvdata(dev);
72 	r = ddata->rom_rng_call(0, 0, RNG_RESET);
76 	clk_disable_unprepare(ddata->clk);
83 	struct omap_rom_rng *ddata;
86 	ddata = dev_get_drvdata(dev);
88 	r = clk_prepare_enable(ddata->clk);
92 	r = ddata->rom_rng_call(0, 0, RNG_GEN_PRNG_HW_INIT);
94 		clk_disable_unprepare(ddata->clk);
105 	struct omap_rom_rng *ddata = data;
107 	pm_runtime_dont_use_autosuspend(ddata->dev);
108 	pm_runtime_disable(ddata->dev);
113 	struct omap_rom_rng *ddata;
116 	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
117 	if (!ddata)
120 	ddata->dev = &pdev->dev;
121 	ddata->ops.priv = (unsigned long)ddata;
122 	ddata->ops.name = "omap3-rom";
123 	ddata->ops.read = of_device_get_match_data(&pdev->dev);
124 	ddata->ops.quality = 900;
125 	if (!ddata->ops.read) {
130 	dev_set_drvdata(ddata->dev, ddata);
132 	ddata->rom_rng_call = pdev->dev.platform_data;
133 	if (!ddata->rom_rng_call) {
134 		dev_err(ddata->dev, "rom_rng_call is NULL\n");
138 	ddata->clk = devm_clk_get(ddata->dev, "ick");
139 	if (IS_ERR(ddata->clk)) {
140 		dev_err(ddata->dev, "unable to get RNG clock\n");
141 		return PTR_ERR(ddata->clk);
148 	ret = devm_add_action_or_reset(ddata->dev, omap_rom_rng_finish,
149 				       ddata);
153 	return devm_hwrng_register(ddata->dev, &ddata->ops);