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From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
To: gregkh@linuxfoundation.org
Cc: linux-kernel@vger.kernel.org, Peng Fan <peng.fan@nxp.com>,
	Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Subject: [PATCH 03/10] nvmem: imx: scu: support hole region check
Date: Tue, 29 Oct 2019 11:42:33 +0000
Message-ID: <20191029114240.14905-4-srinivas.kandagatla@linaro.org> (raw)
In-Reply-To: <20191029114240.14905-1-srinivas.kandagatla@linaro.org>

From: Peng Fan <peng.fan@nxp.com>

Introduce HOLE/ECC_REGION flag and in_hole helper to ease the check
of hole region. The ECC_REGION is also introduced here which is
preparing for programming support. ECC_REGION could only be programmed
once, so need take care.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 drivers/nvmem/imx-ocotp-scu.c | 47 +++++++++++++++++++++++++++++++----
 1 file changed, 42 insertions(+), 5 deletions(-)

diff --git a/drivers/nvmem/imx-ocotp-scu.c b/drivers/nvmem/imx-ocotp-scu.c
index 61a17f943f47..030e27ba4dfb 100644
--- a/drivers/nvmem/imx-ocotp-scu.c
+++ b/drivers/nvmem/imx-ocotp-scu.c
@@ -19,9 +19,20 @@ enum ocotp_devtype {
 	IMX8QM,
 };
 
+#define ECC_REGION	BIT(0)
+#define HOLE_REGION	BIT(1)
+
+struct ocotp_region {
+	u32 start;
+	u32 end;
+	u32 flag;
+};
+
 struct ocotp_devtype_data {
 	int devtype;
 	int nregs;
+	u32 num_region;
+	struct ocotp_region region[];
 };
 
 struct ocotp_priv {
@@ -38,13 +49,41 @@ struct imx_sc_msg_misc_fuse_read {
 static struct ocotp_devtype_data imx8qxp_data = {
 	.devtype = IMX8QXP,
 	.nregs = 800,
+	.num_region = 3,
+	.region = {
+		{0x10, 0x10f, ECC_REGION},
+		{0x110, 0x21F, HOLE_REGION},
+		{0x220, 0x31F, ECC_REGION},
+	},
 };
 
 static struct ocotp_devtype_data imx8qm_data = {
 	.devtype = IMX8QM,
 	.nregs = 800,
+	.num_region = 2,
+	.region = {
+		{0x10, 0x10f, ECC_REGION},
+		{0x1a0, 0x1ff, ECC_REGION},
+	},
 };
 
+static bool in_hole(void *context, u32 index)
+{
+	struct ocotp_priv *priv = context;
+	const struct ocotp_devtype_data *data = priv->data;
+	int i;
+
+	for (i = 0; i < data->num_region; i++) {
+		if (data->region[i].flag & HOLE_REGION) {
+			if ((index >= data->region[i].start) &&
+			    (index <= data->region[i].end))
+				return true;
+		}
+	}
+
+	return false;
+}
+
 static int imx_sc_misc_otp_fuse_read(struct imx_sc_ipc *ipc, u32 word,
 				     u32 *val)
 {
@@ -91,11 +130,9 @@ static int imx_scu_ocotp_read(void *context, unsigned int offset,
 	buf = p;
 
 	for (i = index; i < (index + count); i++) {
-		if (priv->data->devtype == IMX8QXP) {
-			if ((i > 271) && (i < 544)) {
-				*buf++ = 0;
-				continue;
-			}
+		if (in_hole(context, i)) {
+			*buf++ = 0;
+			continue;
 		}
 
 		ret = imx_sc_misc_otp_fuse_read(priv->nvmem_ipc, i, buf);
-- 
2.21.0


  parent reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-29 11:42 [PATCH 00/10] nvmem: patches(set 1) for 5.5 Srinivas Kandagatla
2019-10-29 11:42 ` [PATCH 01/10] nvmem: core: fix nvmem_cell_write inline function Srinivas Kandagatla
2019-10-29 11:42 ` [PATCH 02/10] nvmem: sc27xx: Change to use devm_hwspin_lock_request_specific() to request one hwlock Srinivas Kandagatla
2019-10-29 11:42 ` Srinivas Kandagatla [this message]
2019-10-29 11:42 ` [PATCH 04/10] nvmem: imx: scu: support write Srinivas Kandagatla
2019-10-29 11:42 ` [PATCH 05/10] nvmem: imx-ocotp: reset error status on probe Srinivas Kandagatla
2019-10-29 11:42 ` [PATCH 06/10] dt-bindings: nvmem: Add Spreadtrum eFuse controller documentation Srinivas Kandagatla
2019-10-29 11:42 ` [PATCH 07/10] nvmem: sprd: Add Spreadtrum SoCs eFuse support Srinivas Kandagatla
2019-10-29 11:42 ` [PATCH 08/10] nvmem: imx: scu: fix dependency in Kconfig Srinivas Kandagatla
2019-10-29 11:42 ` [PATCH 09/10] dt-bindings: nvmem: add binding for Rockchip OTP controller Srinivas Kandagatla
2019-10-29 11:42 ` [PATCH 10/10] nvmem: add Rockchip OTP driver Srinivas Kandagatla

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