nvmem: imx-ocotp-ele: support i.MX95

i.MX95 OCOTP has same accessing method, so add an entry for i.MX95, but
some fuse has ECC feature, so only read out the lower 16bits for ECC fuses.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20240902142952.71639-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/nvmem/imx-ocotp-ele.c b/drivers/nvmem/imx-ocotp-ele.c
index cf920542f939ea4743dd507b87f1af4ae05a6ce6..1ba4944976987415c0bfefdbbae23ea0d9adc934 100644 (file)
--- a/drivers/nvmem/imx-ocotp-ele.c
+++ b/drivers/nvmem/imx-ocotp-ele.c
@@ -14,8 +14,9 @@
 #include <linux/slab.h>
 
 enum fuse_type {
-       FUSE_FSB = 1,
-       FUSE_ELE = 2,
+       FUSE_FSB = BIT(0),
+       FUSE_ELE = BIT(1),
+       FUSE_ECC = BIT(2),
        FUSE_INVALID = -1
 };
 
@@ -93,7 +94,10 @@ static int imx_ocotp_reg_read(void *context, unsigned int offset, void *val, siz
                        continue;
                }
 
-               *buf++ = readl_relaxed(reg + (i << 2));
+               if (type & FUSE_ECC)
+                       *buf++ = readl_relaxed(reg + (i << 2)) & GENMASK(15, 0);
+               else
+                       *buf++ = readl_relaxed(reg + (i << 2));
        }
 
        memcpy(val, (u8 *)p, bytes);
@@ -155,8 +159,30 @@ static const struct ocotp_devtype_data imx93_ocotp_data = {
        },
 };
 
+static const struct ocotp_devtype_data imx95_ocotp_data = {
+       .reg_off = 0x8000,
+       .reg_read = imx_ocotp_reg_read,
+       .size = 2048,
+       .num_entry = 12,
+       .entry = {
+               { 0, 1, FUSE_FSB | FUSE_ECC },
+               { 7, 1, FUSE_FSB | FUSE_ECC },
+               { 9, 3, FUSE_FSB | FUSE_ECC },
+               { 12, 24, FUSE_FSB },
+               { 36, 2, FUSE_FSB  | FUSE_ECC },
+               { 38, 14, FUSE_FSB },
+               { 63, 1, FUSE_ELE },
+               { 128, 16, FUSE_ELE },
+               { 188, 1, FUSE_ELE },
+               { 317, 2, FUSE_FSB | FUSE_ECC },
+               { 320, 7, FUSE_FSB },
+               { 328, 184, FUSE_FSB }
+       },
+};
+
 static const struct of_device_id imx_ele_ocotp_dt_ids[] = {
        { .compatible = "fsl,imx93-ocotp", .data = &imx93_ocotp_data, },
+       { .compatible = "fsl,imx95-ocotp", .data = &imx95_ocotp_data, },
        {},
 };
 MODULE_DEVICE_TABLE(of, imx_ele_ocotp_dt_ids);