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Revert "soc: imx8m: change to use platform driver"

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With the SoC matching changed to a platform driver the match data
is available only after other drivers, which may rely on it are
already probed. This breaks at least the CAAM driver on i.MX8M.
Revert the change until all those drivers have been audited and
changed to be able to eal with match data being available later
in the boot process.

Fixes: 7d981405d0 ("soc: imx8m: change to use platform driver")
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Acked-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Lucas Stach 2021-06-28 23:09:55 +02:00 committed by Shawn Guo
parent fd8e83884f
commit ac34de14ac
1 changed files with 12 additions and 72 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
drivers/soc/imx/soc-imx8m.c
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@ -5,8 +5,6 @@
#include <linux/init.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/nvmem-consumer.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/sys_soc.h>
@ -31,7 +29,7 @@
struct imx8_soc_data {
char *name;
u32 (*soc_revision)(struct device *dev);
u32 (*soc_revision)(void);
};
static u64 soc_uid;
@ -52,7 +50,7 @@ static u32 imx8mq_soc_revision_from_atf(void)
static inline u32 imx8mq_soc_revision_from_atf(void) { return 0; };
#endif
static u32 __init imx8mq_soc_revision(struct device *dev)
static u32 __init imx8mq_soc_revision(void)
{
struct device_node *np;
void __iomem *ocotp_base;
@ -77,20 +75,9 @@ static u32 __init imx8mq_soc_revision(struct device *dev)
rev = REV_B1;
}
if (dev) {
int ret;
ret = nvmem_cell_read_u64(dev, "soc_unique_id", &soc_uid);
if (ret) {
iounmap(ocotp_base);
of_node_put(np);
return ret;
}
} else {
soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH);
soc_uid <<= 32;
soc_uid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW);
}
soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH);
soc_uid <<= 32;
soc_uid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW);
iounmap(ocotp_base);
of_node_put(np);
@ -120,7 +107,7 @@ static void __init imx8mm_soc_uid(void)
of_node_put(np);
}
static u32 __init imx8mm_soc_revision(struct device *dev)
static u32 __init imx8mm_soc_revision(void)
{
struct device_node *np;
void __iomem *anatop_base;
@ -138,15 +125,7 @@ static u32 __init imx8mm_soc_revision(struct device *dev)
iounmap(anatop_base);
of_node_put(np);
if (dev) {
int ret;
ret = nvmem_cell_read_u64(dev, "soc_unique_id", &soc_uid);
if (ret)
return ret;
} else {
imx8mm_soc_uid();
}
imx8mm_soc_uid();
return rev;
}
@ -171,7 +150,7 @@ static const struct imx8_soc_data imx8mp_soc_data = {
.soc_revision = imx8mm_soc_revision,
};
static __maybe_unused const struct of_device_id imx8_machine_match[] = {
static __maybe_unused const struct of_device_id imx8_soc_match[] = {
{ .compatible = "fsl,imx8mq", .data = &imx8mq_soc_data, },
{ .compatible = "fsl,imx8mm", .data = &imx8mm_soc_data, },
{ .compatible = "fsl,imx8mn", .data = &imx8mn_soc_data, },
@ -179,20 +158,12 @@ static __maybe_unused const struct of_device_id imx8_machine_match[] = {
{ }
};
static __maybe_unused const struct of_device_id imx8_soc_match[] = {
{ .compatible = "fsl,imx8mq-soc", .data = &imx8mq_soc_data, },
{ .compatible = "fsl,imx8mm-soc", .data = &imx8mm_soc_data, },
{ .compatible = "fsl,imx8mn-soc", .data = &imx8mn_soc_data, },
{ .compatible = "fsl,imx8mp-soc", .data = &imx8mp_soc_data, },
{ }
};
#define imx8_revision(soc_rev) \
soc_rev ? \
kasprintf(GFP_KERNEL, "%d.%d", (soc_rev >> 4) & 0xf, soc_rev & 0xf) : \
"unknown"
static int imx8_soc_info(struct platform_device *pdev)
static int __init imx8_soc_init(void)
{
struct soc_device_attribute *soc_dev_attr;
struct soc_device *soc_dev;
@ -211,10 +182,7 @@ static int imx8_soc_info(struct platform_device *pdev)
if (ret)
goto free_soc;
if (pdev)
id = of_match_node(imx8_soc_match, pdev->dev.of_node);
else
id = of_match_node(imx8_machine_match, of_root);
id = of_match_node(imx8_soc_match, of_root);
if (!id) {
ret = -ENODEV;
goto free_soc;
@ -223,16 +191,8 @@ static int imx8_soc_info(struct platform_device *pdev)
data = id->data;
if (data) {
soc_dev_attr->soc_id = data->name;
if (data->soc_revision) {
if (pdev) {
soc_rev = data->soc_revision(&pdev->dev);
ret = soc_rev;
if (ret < 0)
goto free_soc;
} else {
soc_rev = data->soc_revision(NULL);
}
}
if (data->soc_revision)
soc_rev = data->soc_revision();
}
soc_dev_attr->revision = imx8_revision(soc_rev);
@ -270,24 +230,4 @@ free_soc:
kfree(soc_dev_attr);
return ret;
}
/* Retain device_initcall is for backward compatibility with DTS. */
static int __init imx8_soc_init(void)
{
if (of_find_matching_node_and_match(NULL, imx8_soc_match, NULL))
return 0;
return imx8_soc_info(NULL);
}
device_initcall(imx8_soc_init);
static struct platform_driver imx8_soc_info_driver = {
.probe = imx8_soc_info,
.driver = {
.name = "imx8_soc_info",
.of_match_table = imx8_soc_match,
},
};
module_platform_driver(imx8_soc_info_driver);
MODULE_LICENSE("GPL v2");