2  * Rockchip eFuse Driver
5  * Author: Caesar Wang <wxt@rock-chips.com>
22 #include <linux/nvmem-provider.h>
66 	struct rockchip_efuse_chip *efuse = context;  in rockchip_rk3288_efuse_read()  local
70 	ret = clk_prepare_enable(efuse->clk);  in rockchip_rk3288_efuse_read()
72 		dev_err(efuse->dev, "failed to prepare/enable efuse clk\n");  in rockchip_rk3288_efuse_read()
76 	writel(RK3288_LOAD | RK3288_PGENB, efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3288_efuse_read()
78 	while (bytes--) {  in rockchip_rk3288_efuse_read()
79 		writel(readl(efuse->base + REG_EFUSE_CTRL) &  in rockchip_rk3288_efuse_read()
81 			     efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3288_efuse_read()
82 		writel(readl(efuse->base + REG_EFUSE_CTRL) |  in rockchip_rk3288_efuse_read()
84 			     efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3288_efuse_read()
86 		writel(readl(efuse->base + REG_EFUSE_CTRL) |  in rockchip_rk3288_efuse_read()
87 			     RK3288_STROBE, efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3288_efuse_read()
89 		*buf++ = readb(efuse->base + REG_EFUSE_DOUT);  in rockchip_rk3288_efuse_read()
90 		writel(readl(efuse->base + REG_EFUSE_CTRL) &  in rockchip_rk3288_efuse_read()
91 		       (~RK3288_STROBE), efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3288_efuse_read()
96 	writel(RK3288_PGENB | RK3288_CSB, efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3288_efuse_read()
98 	clk_disable_unprepare(efuse->clk);  in rockchip_rk3288_efuse_read()
106 	struct rockchip_efuse_chip *efuse = context;  in rockchip_rk3328_efuse_read()  local
112 	ret = clk_prepare_enable(efuse->clk);  in rockchip_rk3328_efuse_read()
114 		dev_err(efuse->dev, "failed to prepare/enable efuse clk\n");  in rockchip_rk3328_efuse_read()
118 	/* 128 Byte efuse, 96 Byte for secure, 32 Byte for non-secure */  in rockchip_rk3328_efuse_read()
123 	addr_len = addr_end - addr_start;  in rockchip_rk3328_efuse_read()
128 		ret = -ENOMEM;  in rockchip_rk3328_efuse_read()
132 	while (addr_len--) {  in rockchip_rk3328_efuse_read()
135 		       efuse->base + RK3328_AUTO_CTRL);  in rockchip_rk3328_efuse_read()
137 		status = readl(efuse->base + RK3328_INT_STATUS);  in rockchip_rk3328_efuse_read()
139 			ret = -EIO;  in rockchip_rk3328_efuse_read()
142 		out_value = readl(efuse->base + RK3328_DOUT);  in rockchip_rk3328_efuse_read()
143 		writel(RK3328_INT_FINISH, efuse->base + RK3328_INT_STATUS);  in rockchip_rk3328_efuse_read()
153 	clk_disable_unprepare(efuse->clk);  in rockchip_rk3328_efuse_read()
161 	struct rockchip_efuse_chip *efuse = context;  in rockchip_rk3399_efuse_read()  local
167 	ret = clk_prepare_enable(efuse->clk);  in rockchip_rk3399_efuse_read()
169 		dev_err(efuse->dev, "failed to prepare/enable efuse clk\n");  in rockchip_rk3399_efuse_read()
176 	addr_len = addr_end - addr_start;  in rockchip_rk3399_efuse_read()
181 		clk_disable_unprepare(efuse->clk);  in rockchip_rk3399_efuse_read()
182 		return -ENOMEM;  in rockchip_rk3399_efuse_read()
186 	       efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3399_efuse_read()
188 	while (addr_len--) {  in rockchip_rk3399_efuse_read()
189 		writel(readl(efuse->base + REG_EFUSE_CTRL) | RK3399_STROBE |  in rockchip_rk3399_efuse_read()
191 		       efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3399_efuse_read()
193 		out_value = readl(efuse->base + REG_EFUSE_DOUT);  in rockchip_rk3399_efuse_read()
194 		writel(readl(efuse->base + REG_EFUSE_CTRL) & (~RK3399_STROBE),  in rockchip_rk3399_efuse_read()
195 		       efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3399_efuse_read()
203 	writel(RK3399_PD | RK3399_CSB, efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3399_efuse_read()
209 	clk_disable_unprepare(efuse->clk);  in rockchip_rk3399_efuse_read()
215 	.name = "rockchip-efuse",
224 		.compatible = "rockchip,rockchip-efuse",
228 		.compatible = "rockchip,rk3066a-efuse",
232 		.compatible = "rockchip,rk3188-efuse",
236 		.compatible = "rockchip,rk3228-efuse",
240 		.compatible = "rockchip,rk3288-efuse",
244 		.compatible = "rockchip,rk3368-efuse",
248 		.compatible = "rockchip,rk3328-efuse",
252 		.compatible = "rockchip,rk3399-efuse",
263 	struct rockchip_efuse_chip *efuse;  in rockchip_efuse_probe()  local
265 	struct device *dev = &pdev->dev;  in rockchip_efuse_probe()
270 		return -EINVAL;  in rockchip_efuse_probe()
273 	efuse = devm_kzalloc(dev, sizeof(struct rockchip_efuse_chip),  in rockchip_efuse_probe()
275 	if (!efuse)  in rockchip_efuse_probe()
276 		return -ENOMEM;  in rockchip_efuse_probe()
279 	efuse->base = devm_ioremap_resource(dev, res);  in rockchip_efuse_probe()
280 	if (IS_ERR(efuse->base))  in rockchip_efuse_probe()
281 		return PTR_ERR(efuse->base);  in rockchip_efuse_probe()
283 	efuse->clk = devm_clk_get(dev, "pclk_efuse");  in rockchip_efuse_probe()
284 	if (IS_ERR(efuse->clk))  in rockchip_efuse_probe()
285 		return PTR_ERR(efuse->clk);  in rockchip_efuse_probe()
287 	efuse->dev = dev;  in rockchip_efuse_probe()
288 	if (of_property_read_u32(dev->of_node, "rockchip,efuse-size",  in rockchip_efuse_probe()
289 				 &econfig.size))  in rockchip_efuse_probe()
290 		econfig.size = resource_size(res);  in rockchip_efuse_probe()
292 	econfig.priv = efuse;  in rockchip_efuse_probe()
293 	econfig.dev = efuse->dev;  in rockchip_efuse_probe()
302 		.name = "rockchip-efuse",