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hwspinlock/omap: add support for dt nodes

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HwSpinlock IP is present only on OMAP4 and other newer SoCs,
which are all device-tree boot only. This patch adds the
base support for parsing the DT nodes, and removes the code
dealing with the traditional platform device instantiation.

Signed-off-by: Suman Anna <[email protected]>
[[email protected]: ack for legacy file removal]
Acked-by: Tony Lindgren <[email protected]>
[comment on the imperfect always-zero base_id]
Signed-off-by: Ohad Ben-Cohen <[email protected]>
This commit is contained in:
Suman Anna 2015-03-04 20:01:16 -06:00 • committed by Ohad Ben-Cohen
commit 65bd4341d6
4 changed files with 14 additions and 68 deletions
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18
drivers/hwspinlock/omap_hwspinlock.c
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@ -1,7 +1,7 @@
/*
* OMAP hardware spinlock driver
*
* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
* Copyright (C) 2010-2015 Texas Instruments Incorporated - http://www.ti.com
*
* Contact: Simon Que <sque@ti.com>
* Hari Kanigeri <h-kanigeri2@ti.com>
@ -27,6 +27,7 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/hwspinlock.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include "hwspinlock_internal.h"
@ -80,14 +81,16 @@ static const struct hwspinlock_ops omap_hwspinlock_ops = {
static int omap_hwspinlock_probe(struct platform_device *pdev)
{
struct hwspinlock_pdata *pdata = pdev->dev.platform_data;
struct device_node *node = pdev->dev.of_node;
struct hwspinlock_device *bank;
struct hwspinlock *hwlock;
struct resource *res;
void __iomem *io_base;
int num_locks, i, ret;
/* Only a single hwspinlock block device is supported */
int base_id = 0;
if (!pdata)
if (!node)
return -ENODEV;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@ -141,7 +144,7 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)
hwlock->priv = io_base + LOCK_BASE_OFFSET + sizeof(u32) * i;
ret = hwspin_lock_register(bank, &pdev->dev, &omap_hwspinlock_ops,
pdata->base_id, num_locks);
base_id, num_locks);
if (ret)
goto reg_fail;
@ -174,11 +177,18 @@ static int omap_hwspinlock_remove(struct platform_device *pdev)
return 0;
}
static const struct of_device_id omap_hwspinlock_of_match[] = {
{ .compatible = "ti,omap4-hwspinlock", },
{ /* end */ },
};
MODULE_DEVICE_TABLE(of, omap_hwspinlock_of_match);
static struct platform_driver omap_hwspinlock_driver = {
.probe = omap_hwspinlock_probe,
.remove = omap_hwspinlock_remove,
.driver = {
.name = "omap_hwspinlock",
.of_match_table = of_match_ptr(omap_hwspinlock_of_match),
},
};