From: Abel Vesa <abel.vesa@nxp.com>
To: Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <kernel@pengutronix.de>,
Fabio Estevam <fabio.estevam@nxp.com>,
Lucas Stach <l.stach@pengutronix.de>,
Rob Herring <robh@kernel.org>, Abel Vesa <abelvesa@linux.com>
Cc: dl-linux-imx <linux-imx@nxp.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Abel Vesa <abel.vesa@nxp.com>
Subject: [PATCH] soc: imx: Add generic i.MX8 SoC driver
Date: Sun, 3 Feb 2019 11:49:57 +0000 [thread overview]
Message-ID: <1549194583-7684-1-git-send-email-abel.vesa@nxp.com> (raw)
Add generic i.MX8 SoC driver along with the i.MX8MQ SoC specific code.
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
---
drivers/soc/imx/Makefile | 1 +
drivers/soc/imx/soc-imx8.c | 108 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 109 insertions(+)
create mode 100644 drivers/soc/imx/soc-imx8.c
diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile
index 506a6f3..d6b529e0 100644
--- a/drivers/soc/imx/Makefile
+++ b/drivers/soc/imx/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o
+obj-$(CONFIG_ARCH_MXC) += soc-imx8.o
diff --git a/drivers/soc/imx/soc-imx8.c b/drivers/soc/imx/soc-imx8.c
new file mode 100644
index 0000000..69fe04e
--- /dev/null
+++ b/drivers/soc/imx/soc-imx8.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2019 NXP.
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+
+#define ANADIG_DIGPROG 0x6c
+
+struct imx8_soc_data {
+ char *name;
+ u32 (*soc_revision)(void);
+};
+
+static u32 __init imx_init_revision_from_anatop(void)
+{
+ struct device_node *np;
+ void __iomem *anatop_base;
+ u32 digprog;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,imx8mq-anatop");
+ anatop_base = of_iomap(np, 0);
+ WARN_ON(!anatop_base);
+ digprog = readl_relaxed(anatop_base + ANADIG_DIGPROG);
+ iounmap(anatop_base);
+
+ /*
+ * Bit[7:4] is the base layer revision,
+ * Bit[3:0] is the metal layer revision
+ * e.g. 0x10 stands for Tapeout 1.0
+ */
+ return digprog & 0xff;
+}
+
+u32 imx8mq_soc_revision(void)
+{
+ return imx_init_revision_from_anatop();
+}
+
+struct imx8_soc_data imx8mq_soc_data = {
+ .name = "i.MX8MQ",
+ .soc_revision = imx8mq_soc_revision,
+};
+
+static const struct of_device_id imx8_soc_match[] = {
+ { .compatible = "fsl,imx8mq", .data = &imx8mq_soc_data, },
+ { }
+};
+
+static int __init imx8_soc_init(void)
+{
+ struct soc_device_attribute *soc_dev_attr;
+ struct soc_device *soc_dev;
+ struct device_node *root;
+ const struct of_device_id *id;
+ u32 soc_rev = 0;
+ const struct imx8_soc_data *data;
+ int ret;
+
+ soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+ if (!soc_dev_attr)
+ return -ENODEV;
+
+ soc_dev_attr->family = "Freescale i.MX";
+
+ root = of_find_node_by_path("/");
+ ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
+ if (ret)
+ goto free_soc;
+
+ id = of_match_node(imx8_soc_match, root);
+ if (!id)
+ goto free_soc;
+
+ of_node_put(root);
+
+ data = id->data;
+ if (data) {
+ soc_dev_attr->soc_id = data->name;
+ if (data->soc_revision)
+ soc_rev = data->soc_revision();
+ }
+
+ soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
+ (soc_rev >> 4) & 0xf,
+ soc_rev & 0xf);
+ if (!soc_dev_attr->revision)
+ goto free_soc;
+
+ soc_dev = soc_device_register(soc_dev_attr);
+ if (IS_ERR(soc_dev))
+ goto free_rev;
+
+ return 0;
+
+free_rev:
+ kfree(soc_dev_attr->revision);
+free_soc:
+ kfree(soc_dev_attr);
+ return -ENODEV;
+}
+device_initcall(imx8_soc_init);
--
2.7.4
next reply other threads:[~2019-02-03 11:50 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-03 11:49 Abel Vesa [this message]
2019-02-25 7:57 ` [PATCH] soc: imx: Add generic i.MX8 SoC driver Chris Spencer
2019-02-25 9:31 ` Abel Vesa
2019-02-25 9:46 ` Chris Spencer
2019-02-25 11:33 ` Stefan Agner
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1549194583-7684-1-git-send-email-abel.vesa@nxp.com \
--to=abel.vesa@nxp.com \
--cc=abelvesa@linux.com \
--cc=fabio.estevam@nxp.com \
--cc=kernel@pengutronix.de \
--cc=l.stach@pengutronix.de \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-imx@nxp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=robh@kernel.org \
--cc=shawnguo@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).