Ported from the linux kernel.
Signed-off-by: Rouven Czerwinski <[email protected]>
---
drivers/nvmem/ocotp.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/nvmem/ocotp.c b/drivers/nvmem/ocotp.c
index 3f475e5b1f..1b842ec0ed 100644
--- a/drivers/nvmem/ocotp.c
+++ b/drivers/nvmem/ocotp.c
@@ -48,6 +48,9 @@
#define OCOTP_READ_CTRL 0x30
#define OCOTP_READ_FUSE_DATA 0x40
+#define DEF_FSOURCE 1001 /* > 1000 ns */
+#define DEF_STROBE_PROG 10000 /* IPG clocks */
+
/* OCOTP Registers bits and masks */
#define OCOTP_CTRL_WR_UNLOCK 16
#define OCOTP_CTRL_WR_UNLOCK_KEY 0x3E77
@@ -171,6 +174,27 @@ static int imx6_ocotp_set_timing(struct ocotp_priv *priv)
return 0;
}
+static int imx7_ocotp_set_timing(struct ocotp_priv *priv)
+{
+ unsigned long clk_rate;
+ u64 fsource, strobe_prog;
+ u32 timing;
+
+ clk_rate = clk_get_rate(priv->clk);
+
+ fsource = DIV_ROUND_UP_ULL((u64)clk_rate * DEF_FSOURCE,
+ NSEC_PER_SEC) + 1;
+ strobe_prog = DIV_ROUND_CLOSEST_ULL((u64)clk_rate * DEF_STROBE_PROG,
+ NSEC_PER_SEC) + 1;
+
+ timing = strobe_prog & 0x00000FFF;
+ timing |= (fsource << 12) & 0x000FF000;
+
+ writel(timing, priv->base + OCOTP_TIMING);
+
+ return 0;
+}
+
static int imx6_ocotp_wait_busy(struct ocotp_priv *priv, u32 flags)
{
uint64_t start = get_time_ns();
--
2.27.0
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