linux-stable/drivers/nvmem/zynqmp_nvmem.c
Rajan Vaja 21cd93bab9 firmware: xilinx: Remove eemi ops for get_chipid
Use direct function call instead of eemi ops for get_chipid.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Link: https://lore.kernel.org/r/1587761887-4279-3-git-send-email-jolly.shah@xilinx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-28 15:45:06 +02:00

81 lines
1.8 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2019 Xilinx, Inc.
*/
#include <linux/module.h>
#include <linux/nvmem-provider.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/firmware/xlnx-zynqmp.h>
#define SILICON_REVISION_MASK 0xF
struct zynqmp_nvmem_data {
struct device *dev;
struct nvmem_device *nvmem;
};
static int zynqmp_nvmem_read(void *context, unsigned int offset,
void *val, size_t bytes)
{
int ret;
int idcode, version;
struct zynqmp_nvmem_data *priv = context;
ret = zynqmp_pm_get_chipid(&idcode, &version);
if (ret < 0)
return ret;
dev_dbg(priv->dev, "Read chipid val %x %x\n", idcode, version);
*(int *)val = version & SILICON_REVISION_MASK;
return 0;
}
static struct nvmem_config econfig = {
.name = "zynqmp-nvmem",
.owner = THIS_MODULE,
.word_size = 1,
.size = 1,
.read_only = true,
};
static const struct of_device_id zynqmp_nvmem_match[] = {
{ .compatible = "xlnx,zynqmp-nvmem-fw", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, zynqmp_nvmem_match);
static int zynqmp_nvmem_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct zynqmp_nvmem_data *priv;
priv = devm_kzalloc(dev, sizeof(struct zynqmp_nvmem_data), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->dev = dev;
econfig.dev = dev;
econfig.reg_read = zynqmp_nvmem_read;
econfig.priv = priv;
priv->nvmem = devm_nvmem_register(dev, &econfig);
return PTR_ERR_OR_ZERO(priv->nvmem);
}
static struct platform_driver zynqmp_nvmem_driver = {
.probe = zynqmp_nvmem_probe,
.driver = {
.name = "zynqmp-nvmem",
.of_match_table = zynqmp_nvmem_match,
},
};
module_platform_driver(zynqmp_nvmem_driver);
MODULE_AUTHOR("Michal Simek <michal.simek@xilinx.com>, Nava kishore Manne <navam@xilinx.com>");
MODULE_DESCRIPTION("ZynqMP NVMEM driver");
MODULE_LICENSE("GPL");