mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
*
|
|
* Copyright (C) 2011-2015 John Crispin <blogic@phrozen.org>
|
|
* Copyright (C) 2015 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
|
|
* Copyright (C) 2017 Hauke Mehrtens <hauke@hauke-m.de>
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/err.h>
|
|
#include <linux/mfd/syscon.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/property.h>
|
|
#include <linux/regmap.h>
|
|
|
|
#include <lantiq_soc.h>
|
|
|
|
#define XBAR_ALWAYS_LAST 0x430
|
|
#define XBAR_FPI_BURST_EN BIT(1)
|
|
#define XBAR_AHB_BURST_EN BIT(2)
|
|
|
|
#define RCU_VR9_BE_AHB1S 0x00000008
|
|
|
|
static int ltq_fpi_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct device_node *np = dev->of_node;
|
|
struct resource *res_xbar;
|
|
struct regmap *rcu_regmap;
|
|
void __iomem *xbar_membase;
|
|
u32 rcu_ahb_endianness_reg_offset;
|
|
int ret;
|
|
|
|
res_xbar = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
xbar_membase = devm_ioremap_resource(dev, res_xbar);
|
|
if (IS_ERR(xbar_membase))
|
|
return PTR_ERR(xbar_membase);
|
|
|
|
/* RCU configuration is optional */
|
|
rcu_regmap = syscon_regmap_lookup_by_phandle(np, "lantiq,rcu");
|
|
if (IS_ERR(rcu_regmap))
|
|
return PTR_ERR(rcu_regmap);
|
|
|
|
ret = device_property_read_u32(dev, "lantiq,offset-endianness",
|
|
&rcu_ahb_endianness_reg_offset);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Failed to get RCU reg offset\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = regmap_update_bits(rcu_regmap, rcu_ahb_endianness_reg_offset,
|
|
RCU_VR9_BE_AHB1S, RCU_VR9_BE_AHB1S);
|
|
if (ret) {
|
|
dev_warn(&pdev->dev,
|
|
"Failed to configure RCU AHB endianness\n");
|
|
return ret;
|
|
}
|
|
|
|
/* disable fpi burst */
|
|
ltq_w32_mask(XBAR_FPI_BURST_EN, 0, xbar_membase + XBAR_ALWAYS_LAST);
|
|
|
|
return of_platform_populate(dev->of_node, NULL, NULL, dev);
|
|
}
|
|
|
|
static const struct of_device_id ltq_fpi_match[] = {
|
|
{ .compatible = "lantiq,xrx200-fpi" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ltq_fpi_match);
|
|
|
|
static struct platform_driver ltq_fpi_driver = {
|
|
.probe = ltq_fpi_probe,
|
|
.driver = {
|
|
.name = "fpi-xway",
|
|
.of_match_table = ltq_fpi_match,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(ltq_fpi_driver);
|
|
|
|
MODULE_DESCRIPTION("Lantiq FPI bus driver");
|
|
MODULE_LICENSE("GPL");
|