mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 19:57:38 +07:00
15f5276a2f
Add i.MX SCU SoC info driver to support i.MX8QXP SoC, introduce driver dependency into Kconfig as CONFIG_IMX_SCU must be selected to support i.MX SCU SoC driver, also need to use platform driver model to make sure IMX_SCU driver is probed before i.MX SCU SoC driver. With this patch, SoC info can be read from sysfs: i.mx8qxp-mek# cat /sys/devices/soc0/family Freescale i.MX i.mx8qxp-mek# cat /sys/devices/soc0/soc_id 0x2 i.mx8qxp-mek# cat /sys/devices/soc0/machine Freescale i.MX8QXP MEK i.mx8qxp-mek# cat /sys/devices/soc0/revision 1.1 Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Reviewed-by: Abel Vesa <abel.vesa@nxp.com> Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
145 lines
2.9 KiB
C
145 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright 2019 NXP.
|
|
*/
|
|
|
|
#include <dt-bindings/firmware/imx/rsrc.h>
|
|
#include <linux/firmware/imx/sci.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/sys_soc.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/of.h>
|
|
|
|
#define IMX_SCU_SOC_DRIVER_NAME "imx-scu-soc"
|
|
|
|
static struct imx_sc_ipc *soc_ipc_handle;
|
|
|
|
struct imx_sc_msg_misc_get_soc_id {
|
|
struct imx_sc_rpc_msg hdr;
|
|
union {
|
|
struct {
|
|
u32 control;
|
|
u16 resource;
|
|
} __packed req;
|
|
struct {
|
|
u32 id;
|
|
} resp;
|
|
} data;
|
|
} __packed;
|
|
|
|
static int imx_scu_soc_id(void)
|
|
{
|
|
struct imx_sc_msg_misc_get_soc_id msg;
|
|
struct imx_sc_rpc_msg *hdr = &msg.hdr;
|
|
int ret;
|
|
|
|
hdr->ver = IMX_SC_RPC_VERSION;
|
|
hdr->svc = IMX_SC_RPC_SVC_MISC;
|
|
hdr->func = IMX_SC_MISC_FUNC_GET_CONTROL;
|
|
hdr->size = 3;
|
|
|
|
msg.data.req.control = IMX_SC_C_ID;
|
|
msg.data.req.resource = IMX_SC_R_SYSTEM;
|
|
|
|
ret = imx_scu_call_rpc(soc_ipc_handle, &msg, true);
|
|
if (ret) {
|
|
pr_err("%s: get soc info failed, ret %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
return msg.data.resp.id;
|
|
}
|
|
|
|
static int imx_scu_soc_probe(struct platform_device *pdev)
|
|
{
|
|
struct soc_device_attribute *soc_dev_attr;
|
|
struct soc_device *soc_dev;
|
|
int id, ret;
|
|
u32 val;
|
|
|
|
ret = imx_scu_get_handle(&soc_ipc_handle);
|
|
if (ret)
|
|
return ret;
|
|
|
|
soc_dev_attr = devm_kzalloc(&pdev->dev, sizeof(*soc_dev_attr),
|
|
GFP_KERNEL);
|
|
if (!soc_dev_attr)
|
|
return -ENOMEM;
|
|
|
|
soc_dev_attr->family = "Freescale i.MX";
|
|
|
|
ret = of_property_read_string(of_root,
|
|
"model",
|
|
&soc_dev_attr->machine);
|
|
if (ret)
|
|
return ret;
|
|
|
|
id = imx_scu_soc_id();
|
|
if (id < 0)
|
|
return -EINVAL;
|
|
|
|
/* format soc_id value passed from SCU firmware */
|
|
val = id & 0x1f;
|
|
soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "0x%x", val);
|
|
if (!soc_dev_attr->soc_id)
|
|
return -ENOMEM;
|
|
|
|
/* format revision value passed from SCU firmware */
|
|
val = (id >> 5) & 0xf;
|
|
val = (((val >> 2) + 1) << 4) | (val & 0x3);
|
|
soc_dev_attr->revision = kasprintf(GFP_KERNEL,
|
|
"%d.%d",
|
|
(val >> 4) & 0xf,
|
|
val & 0xf);
|
|
if (!soc_dev_attr->revision) {
|
|
ret = -ENOMEM;
|
|
goto free_soc_id;
|
|
}
|
|
|
|
soc_dev = soc_device_register(soc_dev_attr);
|
|
if (IS_ERR(soc_dev)) {
|
|
ret = PTR_ERR(soc_dev);
|
|
goto free_revision;
|
|
}
|
|
|
|
return 0;
|
|
|
|
free_revision:
|
|
kfree(soc_dev_attr->revision);
|
|
free_soc_id:
|
|
kfree(soc_dev_attr->soc_id);
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_driver imx_scu_soc_driver = {
|
|
.driver = {
|
|
.name = IMX_SCU_SOC_DRIVER_NAME,
|
|
},
|
|
.probe = imx_scu_soc_probe,
|
|
};
|
|
|
|
static int __init imx_scu_soc_init(void)
|
|
{
|
|
struct platform_device *pdev;
|
|
struct device_node *np;
|
|
int ret;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "fsl,imx-scu");
|
|
if (!np)
|
|
return -ENODEV;
|
|
|
|
of_node_put(np);
|
|
|
|
ret = platform_driver_register(&imx_scu_soc_driver);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pdev = platform_device_register_simple(IMX_SCU_SOC_DRIVER_NAME,
|
|
-1, NULL, 0);
|
|
if (IS_ERR(pdev))
|
|
platform_driver_unregister(&imx_scu_soc_driver);
|
|
|
|
return PTR_ERR_OR_ZERO(pdev);
|
|
}
|
|
device_initcall(imx_scu_soc_init);
|