591396b933
Since commit 8b41fc4454 ("kbuild: create modules.builtin without
Makefile.modbuiltin or tristate.conf"), MODULE_LICENSE declarations
are used to identify modules. As a consequence, uses of the macro
in non-modules will cause modprobe to misidentify their containing
object file as a module when it is not (false positives), and modprobe
might succeed rather than failing with a suitable error message.
So remove it in the files in this commit, none of which can be built as
modules.
Signed-off-by: Nick Alcock <nick.alcock@oracle.com>
Suggested-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: linux-modules@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Hitomi Hasegawa <hasegawa-hitomi@fujitsu.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
129 lines
3.1 KiB
C
129 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* ARM Integrator Logical Module bus driver
|
|
* Copyright (C) 2020 Linaro Ltd.
|
|
* Author: Linus Walleij <linus.walleij@linaro.org>
|
|
*
|
|
* See the device tree bindings for this block for more details on the
|
|
* hardware.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/err.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/mfd/syscon.h>
|
|
#include <linux/regmap.h>
|
|
|
|
/* All information about the connected logic modules are in here */
|
|
#define INTEGRATOR_SC_DEC_OFFSET 0x10
|
|
|
|
/* Base address for the expansion modules */
|
|
#define INTEGRATOR_AP_EXP_BASE 0xc0000000
|
|
#define INTEGRATOR_AP_EXP_STRIDE 0x10000000
|
|
|
|
static int integrator_lm_populate(int num, struct device *dev)
|
|
{
|
|
struct device_node *np = dev->of_node;
|
|
struct device_node *child;
|
|
u32 base;
|
|
int ret;
|
|
|
|
base = INTEGRATOR_AP_EXP_BASE + (num * INTEGRATOR_AP_EXP_STRIDE);
|
|
|
|
/* Walk over the child nodes and see what chipselects we use */
|
|
for_each_available_child_of_node(np, child) {
|
|
struct resource res;
|
|
|
|
ret = of_address_to_resource(child, 0, &res);
|
|
if (ret) {
|
|
dev_info(dev, "no valid address on child\n");
|
|
continue;
|
|
}
|
|
|
|
/* First populate the syscon then any devices */
|
|
if (res.start == base) {
|
|
dev_info(dev, "populate module @0x%08x from DT\n",
|
|
base);
|
|
ret = of_platform_default_populate(child, NULL, dev);
|
|
if (ret) {
|
|
dev_err(dev, "failed to populate module\n");
|
|
of_node_put(child);
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id integrator_ap_syscon_match[] = {
|
|
{ .compatible = "arm,integrator-ap-syscon"},
|
|
{ },
|
|
};
|
|
|
|
static int integrator_ap_lm_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct device_node *syscon;
|
|
static struct regmap *map;
|
|
u32 val;
|
|
int ret;
|
|
int i;
|
|
|
|
/* Look up the system controller */
|
|
syscon = of_find_matching_node(NULL, integrator_ap_syscon_match);
|
|
if (!syscon) {
|
|
dev_err(dev,
|
|
"could not find Integrator/AP system controller\n");
|
|
return -ENODEV;
|
|
}
|
|
map = syscon_node_to_regmap(syscon);
|
|
if (IS_ERR(map)) {
|
|
dev_err(dev,
|
|
"could not find Integrator/AP system controller\n");
|
|
return PTR_ERR(map);
|
|
}
|
|
|
|
ret = regmap_read(map, INTEGRATOR_SC_DEC_OFFSET, &val);
|
|
if (ret) {
|
|
dev_err(dev, "could not read from Integrator/AP syscon\n");
|
|
return ret;
|
|
}
|
|
|
|
/* Loop over the connected modules */
|
|
for (i = 0; i < 4; i++) {
|
|
if (!(val & BIT(4 + i)))
|
|
continue;
|
|
|
|
dev_info(dev, "detected module in slot %d\n", i);
|
|
ret = integrator_lm_populate(i, dev);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id integrator_ap_lm_match[] = {
|
|
{ .compatible = "arm,integrator-ap-lm"},
|
|
{ },
|
|
};
|
|
|
|
static struct platform_driver integrator_ap_lm_driver = {
|
|
.probe = integrator_ap_lm_probe,
|
|
.driver = {
|
|
.name = "integratorap-lm",
|
|
.of_match_table = integrator_ap_lm_match,
|
|
},
|
|
};
|
|
module_platform_driver(integrator_ap_lm_driver);
|
|
MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
|
|
MODULE_DESCRIPTION("Integrator AP Logical Module driver");
|