linux-kernel - [PATCH 2/7] nvmem: imx-ocotp: Pass parameters via a struct

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Message-Id: <1506294028-26127-3-git-send-email-pure.logic@nexus-software.ie>
Date:   Mon, 25 Sep 2017 00:00:23 +0100
From:   Bryan O'Donoghue <pure.logic@...us-software.ie>
To:     srinivas.kandagatla@...aro.org, linux-kernel@...r.kernel.org,
        richard.leitner@...data.com, van.freenix@...il.com,
        axel.lin@...ics.com, ping.bai@....com, d.schultz@...tec.de,
        peng.fan@....com
Cc:     Bryan O'Donoghue <pure.logic@...us-software.ie>
Subject: [PATCH 2/7] nvmem: imx-ocotp: Pass parameters via a struct

It will be useful in later patches to know the register access mode and
bit-shift to apply to a given input offset.

Fixes: 0642bac7da42 ("nvmem: imx-ocotp: add write support")

Signed-off-by: Bryan O'Donoghue <pure.logic@...us-software.ie>
---
 drivers/nvmem/imx-ocotp.c | 32 ++++++++++++++++++++++----------
 1 file changed, 22 insertions(+), 10 deletions(-)

diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c
index 17d160f..fed76a4 100644
--- a/drivers/nvmem/imx-ocotp.c
+++ b/drivers/nvmem/imx-ocotp.c
@@ -53,11 +53,15 @@
 
 static DEFINE_MUTEX(ocotp_mutex);
 
+struct octp_params {
+	unsigned int nregs;
+};
+
 struct ocotp_priv {
 	struct device *dev;
 	struct clk *clk;
 	void __iomem *base;
-	unsigned int nregs;
+	struct octp_params *params;
 	struct nvmem_config *config;
 };
 
@@ -121,8 +125,8 @@ static int imx_ocotp_read(void *context, unsigned int offset,
 	index = offset >> 2;
 	count = bytes >> 2;
 
-	if (count > (priv->nregs - index))
-		count = priv->nregs - index;
+	if (count > (priv->params->nregs - index))
+		count = priv->params->nregs - index;
 
 	mutex_lock(&ocotp_mutex);
 
@@ -308,12 +312,20 @@ static struct nvmem_config imx_ocotp_nvmem_config = {
 	.reg_write = imx_ocotp_write,
 };
 
+static const struct octp_params params[] = {
+	{ .nregs = 128},
+	{ .nregs = 64},
+	{ .nregs = 128},
+	{ .nregs = 128},
+	{ .nregs = 64},
+};
+
 static const struct of_device_id imx_ocotp_dt_ids[] = {
-	{ .compatible = "fsl,imx6q-ocotp",  (void *)128 },
-	{ .compatible = "fsl,imx6sl-ocotp", (void *)64 },
-	{ .compatible = "fsl,imx6sx-ocotp", (void *)128 },
-	{ .compatible = "fsl,imx6ul-ocotp", (void *)128 },
-	{ .compatible = "fsl,imx7d-ocotp", (void *)64 },
+	{ .compatible = "fsl,imx6q-ocotp",  (void *)&params[0] },
+	{ .compatible = "fsl,imx6sl-ocotp", (void *)&params[1] },
+	{ .compatible = "fsl,imx6sx-ocotp", (void *)&params[2] },
+	{ .compatible = "fsl,imx6ul-ocotp", (void *)&params[3] },
+	{ .compatible = "fsl,imx7d-ocotp", (void *)&params[4] },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, imx_ocotp_dt_ids);
@@ -342,8 +354,8 @@ static int imx_ocotp_probe(struct platform_device *pdev)
 		return PTR_ERR(priv->clk);
 
 	of_id = of_match_device(imx_ocotp_dt_ids, dev);
-	priv->nregs = (unsigned long)of_id->data;
-	imx_ocotp_nvmem_config.size = 4 * priv->nregs;
+	priv->params = (struct octp_params *)of_id->data;
+	imx_ocotp_nvmem_config.size = 4 * priv->params->nregs;
 	imx_ocotp_nvmem_config.dev = dev;
 	imx_ocotp_nvmem_config.priv = priv;
 	priv->config = &imx_ocotp_nvmem_config;
-- 
2.7.4