Add RK3562 OTP support using rk3562-specific data configuration.
Signed-off-by: Sohaib Mohamed <[email protected]>
---
drivers/nvmem/rockchip-otp.c | 89 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 89 insertions(+)
diff --git a/drivers/nvmem/rockchip-otp.c b/drivers/nvmem/rockchip-otp.c
index 33b242c5bc..d2145bba52 100644
--- a/drivers/nvmem/rockchip-otp.c
+++ b/drivers/nvmem/rockchip-otp.c
@@ -51,6 +51,21 @@
#define OTPC_TIMEOUT 10000
+#define RK3562_NBYTES 2
+
+/* RK3588 Register */
+#define RK3582_OTPC_AUTO_CTRL 0x04
+#define RK3582_OTPC_AUTO_EN 0x08
+#define RK3582_OTPC_INT_ST 0x84
+#define RK3582_OTPC_DOUT0 0x20
+#define RK3582_NO_SECURE_OFFSET 0x300
+#define RK3582_NBYTES 4
+#define RK3582_BURST_NUM 1
+#define RK3582_BURST_SHIFT 8
+#define RK3582_ADDR_SHIFT 16
+#define RK3582_AUTO_EN BIT(0)
+#define RK3582_RD_DONE BIT(1)
+
#define RK3568_NBYTES 2
/* RK3588 Register */
@@ -183,6 +198,65 @@ static int px30_otp_read(void *context, unsigned int
offset,
return ret;
}
+static int rk3562_otp_read(void *context, unsigned int offset, void *val,
+ size_t bytes)
+{
+ struct rockchip_otp *otp = context;
+ unsigned int addr_start, addr_end, addr_offset, addr_len;
+ u32 out_value;
+ u8 *buf;
+ int ret = 0, i = 0;
+
+ addr_start = rounddown(offset, RK3562_NBYTES) / RK3562_NBYTES;
+ addr_end = roundup(offset + bytes, RK3562_NBYTES) / RK3562_NBYTES;
+ addr_offset = offset % RK3562_NBYTES;
+ addr_len = addr_end - addr_start;
+
+ buf = kzalloc(array3_size(addr_len, RK3562_NBYTES, sizeof(*buf)),
+ GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ ret = rockchip_otp_reset(otp);
+ if (ret) {
+ dev_err(otp->dev, "failed to reset otp phy\n");
+ goto out;
+ }
+
+ ret = rockchip_otp_ecc_enable(otp, false);
+ if (ret < 0) {
+ dev_err(otp->dev, "rockchip_otp_ecc_enable err\n");
+ goto out;
+ }
+
+ writel(OTPC_USE_USER | OTPC_USE_USER_MASK, otp->base + OTPC_USER_CTRL);
+ udelay(5);
+ while (addr_len--) {
+ writel(addr_start++ | OTPC_USER_ADDR_MASK,
+ otp->base + OTPC_USER_ADDR);
+ writel(OTPC_USER_FSM_ENABLE | OTPC_USER_FSM_ENABLE_MASK,
+ otp->base + OTPC_USER_ENABLE);
+ ret = rockchip_otp_wait_status(otp, OTPC_INT_STATUS,
OTPC_USER_DONE);
+ if (ret < 0) {
+ dev_err(otp->dev, "timeout during read setup\n");
+ goto read_end;
+ }
+ out_value = readl(otp->base + OTPC_USER_Q);
+ memcpy(&buf[i], &out_value, RK3562_NBYTES);
+ i += RK3562_NBYTES;
+ }
+
+ memcpy(val, buf + addr_offset, bytes);
+
+read_end:
+ writel(0x0 | OTPC_USE_USER_MASK, otp->base + OTPC_USER_CTRL);
+out:
+ kfree(buf);
+
+ return ret;
+}
+
+
static int rk3568_otp_read(void *context, unsigned int offset, void *val,
size_t bytes)
{
@@ -328,6 +402,17 @@ static const struct rockchip_data px30_data = {
.reg_read = px30_otp_read,
};
+static const char * const rk3562_otp_clocks[] = {
+ "usr", "sbpi", "apb", "phy",
+};
+
+static const struct rockchip_data rk3562_data = {
+ .size = 0x80,
+ .clks = rk3562_otp_clocks,
+ .num_clks = ARRAY_SIZE(rk3562_otp_clocks),
+ .reg_read = rk3562_otp_read,
+};
+
static const char * const rk3568_otp_clocks[] = {
"usr", "sbpi", "apb", "phy",
};
@@ -366,6 +451,10 @@ static __maybe_unused const struct of_device_id
rockchip_otp_match[] = {
.compatible = "rockchip,rk3308-otp",
.data = &px30_data,
},
+ {
+ .compatible = "rockchip,rk3562-otp",
+ .data = &rk3562_data,
+ },
{
.compatible = "rockchip,rk3568-otp",
.data = &rk3568_data,
--
2.43.0
