lkml.org 
[lkml]   [2019]   [Feb]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] soc: imx: Add generic i.MX8 SoC driver
Date
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
\
 
 \ /
  Last update: 2019-02-03 12:50    [W:0.059 / U:13.976 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site