drivers/nvmem/lan9662-otpc.c

47 static int lan9662_otp_power(struct lan9662_otp *otp, bool up)
49 	void __iomem *pwrdn = OTP_OTP_PWR_DN(otp->base);
53 		if (lan9662_otp_wait_flag_clear(OTP_OTP_STATUS(otp->base),
63 static int lan9662_otp_execute(struct lan9662_otp *otp)
65 	if (lan9662_otp_wait_flag_clear(OTP_OTP_CMD_GO(otp->base),
69 	if (lan9662_otp_wait_flag_clear(OTP_OTP_STATUS(otp->base),
76 static void lan9662_otp_set_address(struct lan9662_otp *otp, u32 offset)
78 	writel(0xff & (offset >> 8), OTP_OTP_ADDR_HI(otp->base));
79 	writel(0xff & offset, OTP_OTP_ADDR_LO(otp->base));
82 static int lan9662_otp_read_byte(struct lan9662_otp *otp, u32 offset, u8 *dst)
87 	lan9662_otp_set_address(otp, offset);
88 	writel(OTP_OTP_FUNC_CMD_OTP_READ, OTP_OTP_FUNC_CMD(otp->base));
89 	writel(OTP_OTP_CMD_GO_OTP_GO, OTP_OTP_CMD_GO(otp->base));
90 	rc = lan9662_otp_execute(otp);
92 		pass = readl(OTP_OTP_PASS_FAIL(otp->base));
95 		*dst = (u8) readl(OTP_OTP_RD_DATA(otp->base));
100 static int lan9662_otp_write_byte(struct lan9662_otp *otp, u32 offset, u8 data)
105 	lan9662_otp_set_address(otp, offset);
106 	writel(OTP_OTP_PRGM_MODE_OTP_PGM_MODE_BYTE, OTP_OTP_PRGM_MODE(otp->base));
107 	writel(data, OTP_OTP_PRGM_DATA(otp->base));
108 	writel(OTP_OTP_FUNC_CMD_OTP_PROGRAM, OTP_OTP_FUNC_CMD(otp->base));
109 	writel(OTP_OTP_CMD_GO_OTP_GO, OTP_OTP_CMD_GO(otp->base));
111 	rc = lan9662_otp_execute(otp);
113 		pass = readl(OTP_OTP_PASS_FAIL(otp->base));
125 	struct lan9662_otp *otp = context;
130 	lan9662_otp_power(otp, true);
132 		rc = lan9662_otp_read_byte(otp, offset + i, &data);
137 	lan9662_otp_power(otp, false);
145 	struct lan9662_otp *otp = context;
150 	lan9662_otp_power(otp, true);
154 			rc = lan9662_otp_read_byte(otp, offset + i, &data);
162 			rc = lan9662_otp_write_byte(otp, offset + i,
168 	lan9662_otp_power(otp, false);
174 	.name = "lan9662-otp",
186 	struct lan9662_otp *otp;
188 	otp = devm_kzalloc(&pdev->dev, sizeof(*otp), GFP_KERNEL);
189 	if (!otp)
192 	otp->dev = dev;
193 	otp->base = devm_platform_ioremap_resource(pdev, 0);
194 	if (IS_ERR(otp->base))
195 		return PTR_ERR(otp->base);
197 	otp_config.priv = otp;
214 		.name = "lan9662-otp",