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From: Michael Walle <michael@walle.cc>
To: linuxppc-dev@lists.ozlabs.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Shawn Guo <shawnguo@kernel.org>, Li Yang <leoyang.li@nxp.com>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Sudeep Holla <Sudeep.Holla@arm.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Dan Carpenter <dan.carpenter@oracle.com>,
	Michael Walle <michael@walle.cc>
Subject: [PATCH RESEND v2 3/7] soc: fsl: guts: embed fsl_guts_get_svr() in probe()
Date: Mon,  4 Apr 2022 11:56:05 +0200	[thread overview]
Message-ID: <20220404095609.3932782-4-michael@walle.cc> (raw)
In-Reply-To: <20220404095609.3932782-1-michael@walle.cc>

Move the reading of the SVR into the probe function as
fsl_guts_get_svr() is the only user of the static guts variable and this
lets us drop that as well as the malloc() for this variable. Also, we
can unmap the memory region after we accessed it, which will simplify
error handling later.

Signed-off-by: Michael Walle <michael@walle.cc>
Acked-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/soc/fsl/guts.c | 42 +++++++++++-------------------------------
 1 file changed, 11 insertions(+), 31 deletions(-)

diff --git a/drivers/soc/fsl/guts.c b/drivers/soc/fsl/guts.c
index 0bea43770d51..4e5675ab5f73 100644
--- a/drivers/soc/fsl/guts.c
+++ b/drivers/soc/fsl/guts.c
@@ -14,18 +14,12 @@
 #include <linux/platform_device.h>
 #include <linux/fsl/guts.h>
 
-struct guts {
-	struct ccsr_guts __iomem *regs;
-	bool little_endian;
-};
-
 struct fsl_soc_die_attr {
 	char	*die;
 	u32	svr;
 	u32	mask;
 };
 
-static struct guts *guts;
 static struct soc_device_attribute soc_dev_attr;
 
 
@@ -119,40 +113,27 @@ static const struct fsl_soc_die_attr *fsl_soc_die_match(
 	return NULL;
 }
 
-static u32 fsl_guts_get_svr(void)
-{
-	u32 svr = 0;
-
-	if (!guts || !guts->regs)
-		return svr;
-
-	if (guts->little_endian)
-		svr = ioread32(&guts->regs->svr);
-	else
-		svr = ioread32be(&guts->regs->svr);
-
-	return svr;
-}
-
 static int fsl_guts_probe(struct platform_device *pdev)
 {
 	struct device_node *root, *np = pdev->dev.of_node;
 	static struct soc_device *soc_dev;
 	struct device *dev = &pdev->dev;
 	const struct fsl_soc_die_attr *soc_die;
+	struct ccsr_guts __iomem *regs;
 	const char *machine = NULL;
+	bool little_endian;
 	u32 svr;
 
-	/* Initialize guts */
-	guts = devm_kzalloc(dev, sizeof(*guts), GFP_KERNEL);
-	if (!guts)
-		return -ENOMEM;
-
-	guts->little_endian = of_property_read_bool(np, "little-endian");
+	regs = of_iomap(np, 0);
+	if (IS_ERR(regs))
+		return PTR_ERR(regs);
 
-	guts->regs = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(guts->regs))
-		return PTR_ERR(guts->regs);
+	little_endian = of_property_read_bool(np, "little-endian");
+	if (little_endian)
+		svr = ioread32(&regs->svr);
+	else
+		svr = ioread32be(&regs->svr);
+	iounmap(regs);
 
 	/* Register soc device */
 	root = of_find_node_by_path("/");
@@ -167,7 +148,6 @@ static int fsl_guts_probe(struct platform_device *pdev)
 	}
 	of_node_put(root);
 
-	svr = fsl_guts_get_svr();
 	soc_die = fsl_soc_die_match(svr, fsl_soc_die);
 	if (soc_die) {
 		soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL,
-- 
2.30.2


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  parent reply	other threads:[~2022-04-04  9:58 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-04  9:56 [PATCH RESEND v2 0/7] soc: fsl: guts: cleanups and serial_number support Michael Walle
2022-04-04  9:56 ` [PATCH RESEND v2 1/7] soc: fsl: guts: machine variable might be unset Michael Walle
2022-04-04  9:56 ` [PATCH RESEND v2 2/7] soc: fsl: guts: remove module_exit() and fsl_guts_remove() Michael Walle
2022-04-04  9:56 ` Michael Walle [this message]
2022-04-04  9:56 ` [PATCH RESEND v2 4/7] soc: fsl: guts: allocate soc_dev_attr on the heap Michael Walle
2022-04-04  9:56 ` [PATCH RESEND v2 5/7] soc: fsl: guts: use of_root instead of own reference Michael Walle
2022-04-04  9:56 ` [PATCH RESEND v2 6/7] soc: fsl: guts: drop platform driver Michael Walle
2022-04-04  9:56 ` [PATCH RESEND v2 7/7] soc: fsl: guts: add serial_number support Michael Walle
2022-06-22 11:03 ` [PATCH RESEND v2 0/7] soc: fsl: guts: cleanups and " Michael Walle
2022-06-27  6:53   ` Shawn Guo
2022-06-28 18:20     ` Leo Li

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