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From:   Peng Fan <peng.fan@nxp.com>
To:     "shawnguo@kernel.org" <shawnguo@kernel.org>,
        "s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
        "kernel@pengutronix.de" <kernel@pengutronix.de>,
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CC:     dl-linux-imx <linux-imx@nxp.com>,
        Anson Huang <anson.huang@nxp.com>,
        Leonard Crestez <leonard.crestez@nxp.com>,
        "cniedermaier@dh-electronics.com" <cniedermaier@dh-electronics.com>,
        "linux-arm-kernel@lists.infradead.org" 
        <linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Alice Guo <alice.guo@nxp.com>, Peng Fan <peng.fan@nxp.com>
Subject: [PATCH] ARM: imx: use of_root to simplify code
Thread-Topic: [PATCH] ARM: imx: use of_root to simplify code
Thread-Index: AQHVvvAOkP5pfM/SI0ufVklMt6+Kwg==
Date:   Mon, 30 Dec 2019 09:03:51 +0000
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From: Peng Fan <peng.fan@nxp.com>

start_kernel
     |->setup_arch
     |       |->unflatten_device_tree->of_root ready
     |
     |->do_initcalls
           |->customize_machine
                       |->init_machine
                              |->imx_soc_device_init

When imx_soc_device_init, of_root is ready, so we could directly use it.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---

V1:
 Tested on i.MX7D-SDB

 arch/arm/mach-imx/cpu.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/arm/mach-imx/cpu.c b/arch/arm/mach-imx/cpu.c
index 06f8d64b65af..77319b359070 100644
--- a/arch/arm/mach-imx/cpu.c
+++ b/arch/arm/mach-imx/cpu.c
@@ -88,7 +88,6 @@ struct device * __init imx_soc_device_init(void)
 	struct soc_device_attribute *soc_dev_attr;
 	const char *ocotp_compat =3D NULL;
 	struct soc_device *soc_dev;
-	struct device_node *root;
 	struct regmap *ocotp =3D NULL;
 	const char *soc_id;
 	u64 soc_uid =3D 0;
@@ -101,9 +100,7 @@ struct device * __init imx_soc_device_init(void)
=20
 	soc_dev_attr->family =3D "Freescale i.MX";
=20
-	root =3D of_find_node_by_path("/");
-	ret =3D of_property_read_string(root, "model", &soc_dev_attr->machine);
-	of_node_put(root);
+	ret =3D of_property_read_string(of_root, "model", &soc_dev_attr->machine)=
;
 	if (ret)
 		goto free_soc;
=20
--=20
2.16.4