1 // SPDX-License-Identifier: GPL-2.0
4  * The OCOTP driver for Sunplus	SP7021
17 #include <linux/nvmem-provider.h>
94 	writel(readl(otp->base[OTPRX] + OTP_STATUS) & OTP_READ_DONE_MASK &  in sp_otp_read_real()
95 	       OTP_LOAD_SECURE_DONE_MASK, otp->base[OTPRX] + OTP_STATUS);  in sp_otp_read_real()
96 	writel(addr, otp->base[OTPRX] + OTP_READ_ADDRESS);  in sp_otp_read_real()
97 	writel(readl(otp->base[OTPRX] + OTP_CONTROL_2) | OTP_READ,  in sp_otp_read_real()
98 	       otp->base[OTPRX] + OTP_CONTROL_2);  in sp_otp_read_real()
99 	writel(readl(otp->base[OTPRX] + OTP_CONTROL_2) & SEL_BAK_KEY2_MASK & SW_TRIM_EN_MASK  in sp_otp_read_real()
101 	       otp->base[OTPRX] + OTP_CONTROL_2);  in sp_otp_read_real()
102 	writel((readl(otp->base[OTPRX] + OTP_CONTROL_2) & OTP_RD_PERIOD_MASK) | CPU_CLOCK,  in sp_otp_read_real()
103 	       otp->base[OTPRX] + OTP_CONTROL_2);  in sp_otp_read_real()
105 	ret = readl_poll_timeout(otp->base[OTPRX] + OTP_STATUS, status,  in sp_otp_read_real()
111 	*value = (readl(otp->base[HB_GPIO] + ADDRESS_8_DATA + addr_data * OTP_WORD_SIZE)  in sp_otp_read_real()
125 	ret = clk_enable(otp->clk);  in sp_ocotp_read()
133 			dev_err(otp->dev, "OTP read fail:%d at %d", ret, addr);  in sp_ocotp_read()
141 	clk_disable(otp->clk);  in sp_ocotp_read()
147 	.name = "sp-ocotp",
159 	struct device *dev = &pdev->dev;  in sp_ocotp_probe()
166 		return -ENOMEM;  in sp_ocotp_probe()
168 	otp->dev = dev;  in sp_ocotp_probe()
170 	otp->base[HB_GPIO] = devm_platform_ioremap_resource_byname(pdev, "hb_gpio");  in sp_ocotp_probe()
171 	if (IS_ERR(otp->base[HB_GPIO]))  in sp_ocotp_probe()
172 		return PTR_ERR(otp->base[HB_GPIO]);  in sp_ocotp_probe()
174 	otp->base[OTPRX] = devm_platform_ioremap_resource_byname(pdev, "otprx");  in sp_ocotp_probe()
175 	if (IS_ERR(otp->base[OTPRX]))  in sp_ocotp_probe()
176 		return PTR_ERR(otp->base[OTPRX]);  in sp_ocotp_probe()
178 	otp->clk = devm_clk_get(&pdev->dev, NULL);  in sp_ocotp_probe()
179 	if (IS_ERR(otp->clk))  in sp_ocotp_probe()
180 		return dev_err_probe(&pdev->dev, PTR_ERR(otp->clk),  in sp_ocotp_probe()
183 	ret = clk_prepare(otp->clk);  in sp_ocotp_probe()
194 		ret = dev_err_probe(&pdev->dev, PTR_ERR(nvmem),  in sp_ocotp_probe()
207 	clk_unprepare(otp->clk);  in sp_ocotp_probe()
212 	{ .compatible = "sunplus,sp7021-ocotp", .data = &sp_otp_v0 },
220 		.name           = "sunplus,sp7021-ocotp",
227 MODULE_DESCRIPTION("Sunplus On-Chip OTP driver");