3  * Amlogic Meson6, Meson8 and Meson8b eFuse Driver
49 static void meson_mx_efuse_mask_bits(struct meson_mx_efuse *efuse, u32 reg,  in meson_mx_efuse_mask_bits()  argument
54 	data = readl(efuse->base + reg);  in meson_mx_efuse_mask_bits()
58 	writel(data, efuse->base + reg);  in meson_mx_efuse_mask_bits()
61 static int meson_mx_efuse_hw_enable(struct meson_mx_efuse *efuse)  in meson_mx_efuse_hw_enable()  argument
65 	err = clk_prepare_enable(efuse->core_clk);  in meson_mx_efuse_hw_enable()
69 	/* power up the efuse */  in meson_mx_efuse_hw_enable()
70 	meson_mx_efuse_mask_bits(efuse, MESON_MX_EFUSE_CNTL1,  in meson_mx_efuse_hw_enable()
73 	meson_mx_efuse_mask_bits(efuse, MESON_MX_EFUSE_CNTL4,  in meson_mx_efuse_hw_enable()
79 static void meson_mx_efuse_hw_disable(struct meson_mx_efuse *efuse)  in meson_mx_efuse_hw_disable()  argument
81 	meson_mx_efuse_mask_bits(efuse, MESON_MX_EFUSE_CNTL1,  in meson_mx_efuse_hw_disable()
85 	clk_disable_unprepare(efuse->core_clk);  in meson_mx_efuse_hw_disable()
88 static int meson_mx_efuse_read_addr(struct meson_mx_efuse *efuse,  in meson_mx_efuse_read_addr()  argument
96 	meson_mx_efuse_mask_bits(efuse, MESON_MX_EFUSE_CNTL1,  in meson_mx_efuse_read_addr()
100 	meson_mx_efuse_mask_bits(efuse, MESON_MX_EFUSE_CNTL1,  in meson_mx_efuse_read_addr()
103 	meson_mx_efuse_mask_bits(efuse, MESON_MX_EFUSE_CNTL1,  in meson_mx_efuse_read_addr()
107 	meson_mx_efuse_mask_bits(efuse, MESON_MX_EFUSE_CNTL1,  in meson_mx_efuse_read_addr()
110 	meson_mx_efuse_mask_bits(efuse, MESON_MX_EFUSE_CNTL1,  in meson_mx_efuse_read_addr()
117 	readl(efuse->base + MESON_MX_EFUSE_CNTL1);  in meson_mx_efuse_read_addr()
119 	err = readl_poll_timeout_atomic(efuse->base + MESON_MX_EFUSE_CNTL1,  in meson_mx_efuse_read_addr()
124 		dev_err(efuse->config.dev,  in meson_mx_efuse_read_addr()
125 			"Timeout while reading efuse address %u\n", addr);  in meson_mx_efuse_read_addr()
129 	*value = readl(efuse->base + MESON_MX_EFUSE_CNTL2);  in meson_mx_efuse_read_addr()
137 	struct meson_mx_efuse *efuse = context;  in meson_mx_efuse_read()  local
141 	err = meson_mx_efuse_hw_enable(efuse);  in meson_mx_efuse_read()
145 	meson_mx_efuse_mask_bits(efuse, MESON_MX_EFUSE_CNTL1,  in meson_mx_efuse_read()
149 	for (i = 0; i < bytes; i += efuse->config.word_size) {  in meson_mx_efuse_read()
150 		addr = (offset + i) / efuse->config.word_size;  in meson_mx_efuse_read()
152 		err = meson_mx_efuse_read_addr(efuse, addr, &tmp);  in meson_mx_efuse_read()
157 		       min_t(size_t, bytes - i, efuse->config.word_size));  in meson_mx_efuse_read()
160 	meson_mx_efuse_mask_bits(efuse, MESON_MX_EFUSE_CNTL1,  in meson_mx_efuse_read()
163 	meson_mx_efuse_hw_disable(efuse);  in meson_mx_efuse_read()
169 	.name = "meson6-efuse",
174 	.name = "meson8-efuse",
179 	.name = "meson8b-efuse",
184 	{ .compatible = "amlogic,meson6-efuse", .data = &meson6_efuse_data },
185 	{ .compatible = "amlogic,meson8-efuse", .data = &meson8_efuse_data },
186 	{ .compatible = "amlogic,meson8b-efuse", .data = &meson8b_efuse_data },
194 	struct meson_mx_efuse *efuse;  in meson_mx_efuse_probe()  local
201 	efuse = devm_kzalloc(&pdev->dev, sizeof(*efuse), GFP_KERNEL);  in meson_mx_efuse_probe()
202 	if (!efuse)  in meson_mx_efuse_probe()
205 	efuse->base = devm_platform_ioremap_resource(pdev, 0);  in meson_mx_efuse_probe()
206 	if (IS_ERR(efuse->base))  in meson_mx_efuse_probe()
207 		return PTR_ERR(efuse->base);  in meson_mx_efuse_probe()
209 	efuse->config.name = drvdata->name;  in meson_mx_efuse_probe()
210 	efuse->config.owner = THIS_MODULE;  in meson_mx_efuse_probe()
211 	efuse->config.dev = &pdev->dev;  in meson_mx_efuse_probe()
212 	efuse->config.priv = efuse;  in meson_mx_efuse_probe()
213 	efuse->config.add_legacy_fixed_of_cells = true;  in meson_mx_efuse_probe()
214 	efuse->config.stride = drvdata->word_size;  in meson_mx_efuse_probe()
215 	efuse->config.word_size = drvdata->word_size;  in meson_mx_efuse_probe()
216 	efuse->config.size = SZ_512;  in meson_mx_efuse_probe()
217 	efuse->config.read_only = true;  in meson_mx_efuse_probe()
218 	efuse->config.reg_read = meson_mx_efuse_read;  in meson_mx_efuse_probe()
220 	efuse->core_clk = devm_clk_get(&pdev->dev, "core");  in meson_mx_efuse_probe()
221 	if (IS_ERR(efuse->core_clk)) {  in meson_mx_efuse_probe()
223 		return PTR_ERR(efuse->core_clk);  in meson_mx_efuse_probe()
226 	nvmem = devm_nvmem_register(&pdev->dev, &efuse->config);  in meson_mx_efuse_probe()
234 		.name = "meson-mx-efuse",
242 MODULE_DESCRIPTION("Amlogic Meson MX eFuse NVMEM driver");