lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20230127111605.25958-21-srinivas.kandagatla@linaro.org>
Date:   Fri, 27 Jan 2023 11:15:48 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, Michael Walle <michael@...le.cc>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH 20/37] nvmem: imx-ocotp: replace global post processing with layouts

From: Michael Walle <michael@...le.cc>

In preparation of retiring the global post processing hook change this
driver to use layouts. The layout will be supplied during registration
and will be used to add the post processing hook to all added cells.

Signed-off-by: Michael Walle <michael@...le.cc>
Tested-by: Michael Walle <michael@...le.cc> # on kontron-pitx-imx8m
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 drivers/nvmem/imx-ocotp.c | 30 +++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c
index e9b52ecb3f72..ac0edb6398f1 100644
--- a/drivers/nvmem/imx-ocotp.c
+++ b/drivers/nvmem/imx-ocotp.c
@@ -225,18 +225,13 @@ static int imx_ocotp_read(void *context, unsigned int offset,
 static int imx_ocotp_cell_pp(void *context, const char *id, int index,
 			     unsigned int offset, void *data, size_t bytes)
 {
-	struct ocotp_priv *priv = context;
+	u8 *buf = data;
+	int i;
 
 	/* Deal with some post processing of nvmem cell data */
-	if (id && !strcmp(id, "mac-address")) {
-		if (priv->params->reverse_mac_address) {
-			u8 *buf = data;
-			int i;
-
-			for (i = 0; i < bytes/2; i++)
-				swap(buf[i], buf[bytes - i - 1]);
-		}
-	}
+	if (id && !strcmp(id, "mac-address"))
+		for (i = 0; i < bytes / 2; i++)
+			swap(buf[i], buf[bytes - i - 1]);
 
 	return 0;
 }
@@ -488,7 +483,6 @@ static struct nvmem_config imx_ocotp_nvmem_config = {
 	.stride = 1,
 	.reg_read = imx_ocotp_read,
 	.reg_write = imx_ocotp_write,
-	.cell_post_process = imx_ocotp_cell_pp,
 };
 
 static const struct ocotp_params imx6q_params = {
@@ -595,6 +589,17 @@ static const struct of_device_id imx_ocotp_dt_ids[] = {
 };
 MODULE_DEVICE_TABLE(of, imx_ocotp_dt_ids);
 
+static void imx_ocotp_fixup_cell_info(struct nvmem_device *nvmem,
+				      struct nvmem_layout *layout,
+				      struct nvmem_cell_info *cell)
+{
+	cell->read_post_process = imx_ocotp_cell_pp;
+}
+
+struct nvmem_layout imx_ocotp_layout = {
+	.fixup_cell_info = imx_ocotp_fixup_cell_info,
+};
+
 static int imx_ocotp_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -619,6 +624,9 @@ static int imx_ocotp_probe(struct platform_device *pdev)
 	imx_ocotp_nvmem_config.size = 4 * priv->params->nregs;
 	imx_ocotp_nvmem_config.dev = dev;
 	imx_ocotp_nvmem_config.priv = priv;
+	if (priv->params->reverse_mac_address)
+		imx_ocotp_nvmem_config.layout = &imx_ocotp_layout;
+
 	priv->config = &imx_ocotp_nvmem_config;
 
 	clk_prepare_enable(priv->clk);
-- 
2.25.1

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ