[PATCH v4 2/3] soc: imx8m: Remove global soc_uid

[Marek Vasut <marex@denx.de>]

The static global soc_uid is only ever used as kasprintf() parameter in
imx8m_soc_probe(). Pass pointer to local u64 variable to .soc_revision()
callback instead and let the .soc_revision() callback fill in the content.
Remove the unnecessary static global variable.

Signed-off-by: Marek Vasut <marex@denx.de>
---
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Jeff Johnson <quic_jjohnson@quicinc.com>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Saravana Kannan <saravanak@google.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: imx@lists.linux.dev
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
V3: New patch
V4: No change
---
 drivers/soc/imx/soc-imx8m.c | 31 +++++++++++++++----------------
 1 file changed, 15 insertions(+), 16 deletions(-)

diff --git a/drivers/soc/imx/soc-imx8m.c b/drivers/soc/imx/soc-imx8m.c
index 5ea8887828c06..966593320e28d 100644
--- a/drivers/soc/imx/soc-imx8m.c
+++ b/drivers/soc/imx/soc-imx8m.c
@@ -30,11 +30,9 @@
 
 struct imx8_soc_data {
 	char *name;
-	int (*soc_revision)(u32 *socrev);
+	int (*soc_revision)(u32 *socrev, u64 *socuid);
 };
 
-static u64 soc_uid;
-
 #ifdef CONFIG_HAVE_ARM_SMCCC
 static u32 imx8mq_soc_revision_from_atf(void)
 {
@@ -51,7 +49,7 @@ static u32 imx8mq_soc_revision_from_atf(void)
 static inline u32 imx8mq_soc_revision_from_atf(void) { return 0; };
 #endif
 
-static int imx8mq_soc_revision(u32 *socrev)
+static int imx8mq_soc_revision(u32 *socrev, u64 *socuid)
 {
 	struct device_node *np;
 	void __iomem *ocotp_base;
@@ -89,9 +87,9 @@ static int imx8mq_soc_revision(u32 *socrev)
 			rev = REV_B1;
 	}
 
-	soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH);
-	soc_uid <<= 32;
-	soc_uid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW);
+	*socuid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH);
+	*socuid <<= 32;
+	*socuid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW);
 
 	*socrev = rev;
 
@@ -109,7 +107,7 @@ static int imx8mq_soc_revision(u32 *socrev)
 	return ret;
 }
 
-static int imx8mm_soc_uid(void)
+static int imx8mm_soc_uid(u64 *socuid)
 {
 	void __iomem *ocotp_base;
 	struct device_node *np;
@@ -136,9 +134,9 @@ static int imx8mm_soc_uid(void)
 
 	clk_prepare_enable(clk);
 
-	soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH + offset);
-	soc_uid <<= 32;
-	soc_uid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW + offset);
+	*socuid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH + offset);
+	*socuid <<= 32;
+	*socuid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW + offset);
 
 	clk_disable_unprepare(clk);
 	clk_put(clk);
@@ -151,7 +149,7 @@ static int imx8mm_soc_uid(void)
 	return ret;
 }
 
-static int imx8mm_soc_revision(u32 *socrev)
+static int imx8mm_soc_revision(u32 *socrev, u64 *socuid)
 {
 	struct device_node *np;
 	void __iomem *anatop_base;
@@ -172,7 +170,7 @@ static int imx8mm_soc_revision(u32 *socrev)
 	iounmap(anatop_base);
 	of_node_put(np);
 
-	return imx8mm_soc_uid();
+	return imx8mm_soc_uid(socuid);
 
 err_iomap:
 	of_node_put(np);
@@ -215,10 +213,11 @@ static __maybe_unused const struct of_device_id imx8_soc_match[] = {
 static int imx8m_soc_probe(struct platform_device *pdev)
 {
 	struct soc_device_attribute *soc_dev_attr;
-	struct soc_device *soc_dev;
+	const struct imx8_soc_data *data;
 	const struct of_device_id *id;
+	struct soc_device *soc_dev;
 	u32 soc_rev = 0;
-	const struct imx8_soc_data *data;
+	u64 soc_uid = 0;
 	int ret;
 
 	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
@@ -241,7 +240,7 @@ static int imx8m_soc_probe(struct platform_device *pdev)
 	if (data) {
 		soc_dev_attr->soc_id = data->name;
 		if (data->soc_revision) {
-			ret = data->soc_revision(&soc_rev);
+			ret = data->soc_revision(&soc_rev, &soc_uid);
 			if (ret)
 				goto free_soc;
 		}
-- 
2.45.2