linux-kernel - [PATCH 1/6] nvmem: imx-ocotp: Elongate OCOTP

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Date:   Wed, 26 Jun 2019 11:27:28 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org,
        Bryan O'Donoghue <pure.logic@...us-software.ie>,
        Leonard Crestez <leonard.crestez@....com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH 1/6] nvmem: imx-ocotp: Elongate OCOTP_CTRL ADDR field to eight bits

From: Bryan O'Donoghue <pure.logic@...us-software.ie>

i.MX6 defines OCOTP_CTRLn:ADDR as seven bit address-field with a one bit
RSVD0 field, i.MX7 defines OCOTP_CTRLn:ADDR as a four bit address-field
with a four bit RSVD0 field.

i.MX8 defines the OCOTP_CTRLn:ADDR bit-field as a full range eight bits.

i.MX6 and i.MX7 should return zero for their respective RSVD0 bits and
ignore a write-back of zero where i.MX8 will make use of the full range.

This patch expands the bit-field definition for all users to eight bits,
which is safe due to RSVD0 being a no-op for the i.MX6 and i.MX7.

Signed-off-by: Bryan O'Donoghue <pure.logic@...us-software.ie>
Reviewed-by: Leonard Crestez <leonard.crestez@....com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 drivers/nvmem/imx-ocotp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c
index bd016b928589..14c2bff2cd96 100644
--- a/drivers/nvmem/imx-ocotp.c
+++ b/drivers/nvmem/imx-ocotp.c
@@ -39,7 +39,7 @@
 #define IMX_OCOTP_ADDR_DATA2		0x0040
 #define IMX_OCOTP_ADDR_DATA3		0x0050
 
-#define IMX_OCOTP_BM_CTRL_ADDR		0x0000007F
+#define IMX_OCOTP_BM_CTRL_ADDR		0x000000FF
 #define IMX_OCOTP_BM_CTRL_BUSY		0x00000100
 #define IMX_OCOTP_BM_CTRL_ERROR		0x00000200
 #define IMX_OCOTP_BM_CTRL_REL_SHADOWS	0x00000400
-- 
2.21.0