linux/drivers/nvmem/qfprom.c
Randy Dunlap ac3167257b headers: separate linux/mod_devicetable.h from linux/platform_device.h
At over 4000 #includes, <linux/platform_device.h> is the 9th most
#included header file in the Linux kernel.  It does not need
<linux/mod_devicetable.h>, so drop that header and explicitly add
<linux/mod_devicetable.h> to source files that need it.

   4146 #include <linux/platform_device.h>

After this patch, there are 225 files that use <linux/mod_devicetable.h>,
for a reduction of around 3900 times that <linux/mod_devicetable.h>
does not have to be read & parsed.

    225 #include <linux/mod_devicetable.h>

This patch was build-tested on 20 different arch-es.

It also makes these drivers SubmitChecklist#1 compliant.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kbuild test robot <lkp@intel.com> # drivers/media/platform/vimc/
Reported-by: kbuild test robot <lkp@intel.com> # drivers/pinctrl/pinctrl-u300.c
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-07 17:52:26 +02:00

101 lines
2.4 KiB
C

/*
* Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/io.h>
#include <linux/nvmem-provider.h>
#include <linux/platform_device.h>
struct qfprom_priv {
void __iomem *base;
};
static int qfprom_reg_read(void *context,
unsigned int reg, void *_val, size_t bytes)
{
struct qfprom_priv *priv = context;
u8 *val = _val;
int i = 0, words = bytes;
while (words--)
*val++ = readb(priv->base + reg + i++);
return 0;
}
static int qfprom_reg_write(void *context,
unsigned int reg, void *_val, size_t bytes)
{
struct qfprom_priv *priv = context;
u8 *val = _val;
int i = 0, words = bytes;
while (words--)
writeb(*val++, priv->base + reg + i++);
return 0;
}
static struct nvmem_config econfig = {
.name = "qfprom",
.stride = 1,
.word_size = 1,
.reg_read = qfprom_reg_read,
.reg_write = qfprom_reg_write,
};
static int qfprom_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
struct nvmem_device *nvmem;
struct qfprom_priv *priv;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
priv->base = devm_ioremap_resource(dev, res);
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
econfig.size = resource_size(res);
econfig.dev = dev;
econfig.priv = priv;
nvmem = devm_nvmem_register(dev, &econfig);
return PTR_ERR_OR_ZERO(nvmem);
}
static const struct of_device_id qfprom_of_match[] = {
{ .compatible = "qcom,qfprom",},
{/* sentinel */},
};
MODULE_DEVICE_TABLE(of, qfprom_of_match);
static struct platform_driver qfprom_driver = {
.probe = qfprom_probe,
.driver = {
.name = "qcom,qfprom",
.of_match_table = qfprom_of_match,
},
};
module_platform_driver(qfprom_driver);
MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");
MODULE_DESCRIPTION("Qualcomm QFPROM driver");
MODULE_LICENSE("GPL v2");