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rtc: m48t86: remove unused platform_data 

All users of this driver have been updated to allow the driver to
manage it's own resources and do the read/write operations internally.
The m48t86_ops are no longer used.

Remove the platform_data header and the support code in the driver.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
H Hartley Sweeten 2017-02-15 09:35:27 -07:00 committed by Alexandre Belloni
parent 8ccbd36006
commit 0500ce589a
2 changed files with 18 additions and 47 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/rtc/rtc-m48t86.c
View File

@ -16,7 +16,6 @@
#include <linux/module.h>
#include <linux/rtc.h>
#include <linux/platform_device.h>
#include <linux/platform_data/rtc-m48t86.h>
#include <linux/bcd.h>
#include <linux/io.h>
@ -45,7 +44,6 @@ struct m48t86_rtc_info {
void __iomem *index_reg;
void __iomem *data_reg;
struct rtc_device *rtc;
struct m48t86_ops *ops;
};
static unsigned char m48t86_readb(struct device *dev, unsigned long addr)
@ -53,12 +51,9 @@ static unsigned char m48t86_readb(struct device *dev, unsigned long addr)
struct m48t86_rtc_info *info = dev_get_drvdata(dev);
unsigned char value;
if (info->ops) {
value = info->ops->readbyte(addr);
} else {
writeb(addr, info->index_reg);
value = readb(info->data_reg);
}
writeb(addr, info->index_reg);
value = readb(info->data_reg);
return value;
}
@ -67,12 +62,8 @@ static void m48t86_writeb(struct device *dev,
{
struct m48t86_rtc_info *info = dev_get_drvdata(dev);
if (info->ops) {
info->ops->writebyte(value, addr);
} else {
writeb(addr, info->index_reg);
writeb(value, info->data_reg);
}
writeb(addr, info->index_reg);
writeb(value, info->data_reg);
}
static int m48t86_rtc_read_time(struct device *dev, struct rtc_time *tm)
@ -235,30 +226,26 @@ static bool m48t86_verify_chip(struct platform_device *pdev)
static int m48t86_rtc_probe(struct platform_device *pdev)
{
struct m48t86_rtc_info *info;
struct resource *res;
unsigned char reg;
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->ops = dev_get_platdata(&pdev->dev);
if (!info->ops) {
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENODEV;
info->index_reg = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(info->index_reg))
return PTR_ERR(info->index_reg);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENODEV;
info->index_reg = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(info->index_reg))
return PTR_ERR(info->index_reg);
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!res)
return -ENODEV;
info->data_reg = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(info->data_reg))
return PTR_ERR(info->data_reg);
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!res)
return -ENODEV;
info->data_reg = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(info->data_reg))
return PTR_ERR(info->data_reg);
dev_set_drvdata(&pdev->dev, info);

16
include/linux/platform_data/rtc-m48t86.h
View File

@ -1,16 +0,0 @@
/*
* ST M48T86 / Dallas DS12887 RTC driver
* Copyright (c) 2006 Tower Technologies
*
* Author: Alessandro Zummo <a.zummo@towertech.it>
*
* 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.
*/
struct m48t86_ops
{
void (*writebyte)(unsigned char value, unsigned long addr);
unsigned char (*readbyte)(unsigned long addr);
};