1 // SPDX-License-Identifier: GPL-2.0-only
3  * Rockchip eFuse Driver
6  * Author: Caesar Wang <wxt@rock-chips.com>
14 #include <linux/nvmem-provider.h>
58 	struct rockchip_efuse_chip *efuse = context;  in rockchip_rk3288_efuse_read()  local
62 	ret = clk_prepare_enable(efuse->clk);  in rockchip_rk3288_efuse_read()
64 		dev_err(efuse->dev, "failed to prepare/enable efuse clk\n");  in rockchip_rk3288_efuse_read()
68 	writel(RK3288_LOAD | RK3288_PGENB, efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3288_efuse_read()
70 	while (bytes--) {  in rockchip_rk3288_efuse_read()
71 		writel(readl(efuse->base + REG_EFUSE_CTRL) &  in rockchip_rk3288_efuse_read()
73 			     efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3288_efuse_read()
74 		writel(readl(efuse->base + REG_EFUSE_CTRL) |  in rockchip_rk3288_efuse_read()
76 			     efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3288_efuse_read()
78 		writel(readl(efuse->base + REG_EFUSE_CTRL) |  in rockchip_rk3288_efuse_read()
79 			     RK3288_STROBE, efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3288_efuse_read()
81 		*buf++ = readb(efuse->base + REG_EFUSE_DOUT);  in rockchip_rk3288_efuse_read()
82 		writel(readl(efuse->base + REG_EFUSE_CTRL) &  in rockchip_rk3288_efuse_read()
83 		       (~RK3288_STROBE), efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3288_efuse_read()
88 	writel(RK3288_PGENB | RK3288_CSB, efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3288_efuse_read()
90 	clk_disable_unprepare(efuse->clk);  in rockchip_rk3288_efuse_read()
98 	struct rockchip_efuse_chip *efuse = context;  in rockchip_rk3328_efuse_read()  local
104 	ret = clk_prepare_enable(efuse->clk);  in rockchip_rk3328_efuse_read()
106 		dev_err(efuse->dev, "failed to prepare/enable efuse clk\n");  in rockchip_rk3328_efuse_read()
110 	/* 128 Byte efuse, 96 Byte for secure, 32 Byte for non-secure */  in rockchip_rk3328_efuse_read()
115 	addr_len = addr_end - addr_start;  in rockchip_rk3328_efuse_read()
120 		ret = -ENOMEM;  in rockchip_rk3328_efuse_read()
124 	while (addr_len--) {  in rockchip_rk3328_efuse_read()
127 		       efuse->base + RK3328_AUTO_CTRL);  in rockchip_rk3328_efuse_read()
129 		status = readl(efuse->base + RK3328_INT_STATUS);  in rockchip_rk3328_efuse_read()
131 			ret = -EIO;  in rockchip_rk3328_efuse_read()
134 		out_value = readl(efuse->base + RK3328_DOUT);  in rockchip_rk3328_efuse_read()
135 		writel(RK3328_INT_FINISH, efuse->base + RK3328_INT_STATUS);  in rockchip_rk3328_efuse_read()
145 	clk_disable_unprepare(efuse->clk);  in rockchip_rk3328_efuse_read()
153 	struct rockchip_efuse_chip *efuse = context;  in rockchip_rk3399_efuse_read()  local
159 	ret = clk_prepare_enable(efuse->clk);  in rockchip_rk3399_efuse_read()
161 		dev_err(efuse->dev, "failed to prepare/enable efuse clk\n");  in rockchip_rk3399_efuse_read()
168 	addr_len = addr_end - addr_start;  in rockchip_rk3399_efuse_read()
173 		clk_disable_unprepare(efuse->clk);  in rockchip_rk3399_efuse_read()
174 		return -ENOMEM;  in rockchip_rk3399_efuse_read()
178 	       efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3399_efuse_read()
180 	while (addr_len--) {  in rockchip_rk3399_efuse_read()
181 		writel(readl(efuse->base + REG_EFUSE_CTRL) | RK3399_STROBE |  in rockchip_rk3399_efuse_read()
183 		       efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3399_efuse_read()
185 		out_value = readl(efuse->base + REG_EFUSE_DOUT);  in rockchip_rk3399_efuse_read()
186 		writel(readl(efuse->base + REG_EFUSE_CTRL) & (~RK3399_STROBE),  in rockchip_rk3399_efuse_read()
187 		       efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3399_efuse_read()
195 	writel(RK3399_PD | RK3399_CSB, efuse->base + REG_EFUSE_CTRL);  in rockchip_rk3399_efuse_read()
201 	clk_disable_unprepare(efuse->clk);  in rockchip_rk3399_efuse_read()
207 	.name = "rockchip-efuse",
218 		.compatible = "rockchip,rockchip-efuse",
222 		.compatible = "rockchip,rk3066a-efuse",
226 		.compatible = "rockchip,rk3188-efuse",
230 		.compatible = "rockchip,rk3228-efuse",
234 		.compatible = "rockchip,rk3288-efuse",
238 		.compatible = "rockchip,rk3368-efuse",
242 		.compatible = "rockchip,rk3328-efuse",
246 		.compatible = "rockchip,rk3399-efuse",
257 	struct rockchip_efuse_chip *efuse;  in rockchip_efuse_probe()  local
259 	struct device *dev = &pdev->dev;  in rockchip_efuse_probe()
264 		return -EINVAL;  in rockchip_efuse_probe()
267 	efuse = devm_kzalloc(dev, sizeof(struct rockchip_efuse_chip),  in rockchip_efuse_probe()
269 	if (!efuse)  in rockchip_efuse_probe()
270 		return -ENOMEM;  in rockchip_efuse_probe()
272 	efuse->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in rockchip_efuse_probe()
273 	if (IS_ERR(efuse->base))  in rockchip_efuse_probe()
274 		return PTR_ERR(efuse->base);  in rockchip_efuse_probe()
276 	efuse->clk = devm_clk_get(dev, "pclk_efuse");  in rockchip_efuse_probe()
277 	if (IS_ERR(efuse->clk))  in rockchip_efuse_probe()
278 		return PTR_ERR(efuse->clk);  in rockchip_efuse_probe()
280 	efuse->dev = dev;  in rockchip_efuse_probe()
281 	if (of_property_read_u32(dev->of_node, "rockchip,efuse-size",  in rockchip_efuse_probe()
285 	econfig.priv = efuse;  in rockchip_efuse_probe()
286 	econfig.dev = efuse->dev;  in rockchip_efuse_probe()
295 		.name = "rockchip-efuse",