1 // SPDX-License-Identifier: GPL-2.0+
6  * Copyright (C) 2014 Maxime Ripard <maxime.ripard@free-electrons.com>
13 #include <linux/nvmem-provider.h>
19 /* Registers and special values for doing register-based SID readout on H3 */
42 	struct sunxi_sid *sid = context;  in sunxi_sid_read()  local
46 	__ioread32_copy(val, sid->base + sid->value_offset + offset, bytes / 4);  in sunxi_sid_read()
56 	word = readl_relaxed(sid->base + sid->value_offset + offset);  in sunxi_sid_read()
62 static int sun8i_sid_register_readout(const struct sunxi_sid *sid,  in sun8i_sid_register_readout()  argument
73 	writel(reg_val, sid->base + SUN8I_SID_PRCTL);  in sun8i_sid_register_readout()
75 	ret = readl_poll_timeout(sid->base + SUN8I_SID_PRCTL, reg_val,  in sun8i_sid_register_readout()
81 		*out = readl(sid->base + SUN8I_SID_RDKEY);  in sun8i_sid_register_readout()
83 	writel(0, sid->base + SUN8I_SID_PRCTL);  in sun8i_sid_register_readout()
89  * On Allwinner H3, the value on the 0x200 offset of the SID controller seems
96 	struct sunxi_sid *sid = context;  in sun8i_sid_read_by_reg()  local
102 		ret = sun8i_sid_register_readout(sid, offset, val);  in sun8i_sid_read_by_reg()
108 		bytes -= 4;  in sun8i_sid_read_by_reg()
115 	ret = sun8i_sid_register_readout(sid, offset, &word);  in sun8i_sid_read_by_reg()
126 	struct device *dev = &pdev->dev;  in sunxi_sid_probe()
129 	struct sunxi_sid *sid;  in sunxi_sid_probe()  local
134 	sid = devm_kzalloc(dev, sizeof(*sid), GFP_KERNEL);  in sunxi_sid_probe()
135 	if (!sid)  in sunxi_sid_probe()
136 		return -ENOMEM;  in sunxi_sid_probe()
140 		return -EINVAL;  in sunxi_sid_probe()
141 	sid->value_offset = cfg->value_offset;  in sunxi_sid_probe()
143 	sid->base = devm_platform_ioremap_resource(pdev, 0);  in sunxi_sid_probe()
144 	if (IS_ERR(sid->base))  in sunxi_sid_probe()
145 		return PTR_ERR(sid->base);  in sunxi_sid_probe()
147 	size = cfg->size;  in sunxi_sid_probe()
151 		return -ENOMEM;  in sunxi_sid_probe()
153 	nvmem_cfg->dev = dev;  in sunxi_sid_probe()
154 	nvmem_cfg->name = "sunxi-sid";  in sunxi_sid_probe()
155 	nvmem_cfg->type = NVMEM_TYPE_OTP;  in sunxi_sid_probe()
156 	nvmem_cfg->add_legacy_fixed_of_cells = true;  in sunxi_sid_probe()
157 	nvmem_cfg->read_only = true;  in sunxi_sid_probe()
158 	nvmem_cfg->size = cfg->size;  in sunxi_sid_probe()
159 	nvmem_cfg->word_size = 1;  in sunxi_sid_probe()
160 	nvmem_cfg->stride = 4;  in sunxi_sid_probe()
161 	nvmem_cfg->priv = sid;  in sunxi_sid_probe()
162 	if (cfg->need_register_readout)  in sunxi_sid_probe()
163 		nvmem_cfg->reg_read = sun8i_sid_read_by_reg;  in sunxi_sid_probe()
165 		nvmem_cfg->reg_read = sunxi_sid_read;  in sunxi_sid_probe()
173 		return -ENOMEM;  in sunxi_sid_probe()
175 	nvmem_cfg->reg_read(sid, 0, randomness, size);  in sunxi_sid_probe()
209 	{ .compatible = "allwinner,sun4i-a10-sid", .data = &sun4i_a10_cfg },
210 	{ .compatible = "allwinner,sun7i-a20-sid", .data = &sun7i_a20_cfg },
211 	{ .compatible = "allwinner,sun8i-a83t-sid", .data = &sun50i_a64_cfg },
212 	{ .compatible = "allwinner,sun8i-h3-sid", .data = &sun8i_h3_cfg },
213 	{ .compatible = "allwinner,sun20i-d1-sid", .data = &sun50i_a64_cfg },
214 	{ .compatible = "allwinner,sun50i-a64-sid", .data = &sun50i_a64_cfg },
215 	{ .compatible = "allwinner,sun50i-h5-sid", .data = &sun50i_a64_cfg },
216 	{ .compatible = "allwinner,sun50i-h6-sid", .data = &sun50i_h6_cfg },
224 		.name = "eeprom-sunxi-sid",