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i2c: rcar: remove spinlock 

The i2c core has per-adapter locks, so no need to protect again.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Wolfram Sang 2014-05-28 09:44:43 +02:00 коммит произвёл Wolfram Sang
Родитель 3c95de6744
Коммит 150b8be3cd
1 изменённых файлов: 0 добавлений и 22 удалений
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22
drivers/i2c/busses/i2c-rcar.c
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@ -36,7 +36,6 @@
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
/* register offsets */
#define ICSCR 0x00 /* slave ctrl */
@ -110,7 +109,6 @@ struct rcar_i2c_priv {
struct i2c_msg *msg;
struct clk *clk;
spinlock_t lock;
wait_queue_head_t wait;
int pos;
@ -394,9 +392,6 @@ static irqreturn_t rcar_i2c_irq(int irq, void *ptr)
struct device *dev = rcar_i2c_priv_to_dev(priv);
u32 msr;
/*-------------- spin lock -----------------*/
spin_lock(&priv->lock);
msr = rcar_i2c_read(priv, ICMSR);
/*
@ -450,9 +445,6 @@ out:
wake_up(&priv->wait);
}
spin_unlock(&priv->lock);
/*-------------- spin unlock -----------------*/
return IRQ_HANDLED;
}
@ -462,21 +454,14 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap,
{
struct rcar_i2c_priv *priv = i2c_get_adapdata(adap);
struct device *dev = rcar_i2c_priv_to_dev(priv);
unsigned long flags;
int i, ret, timeout;
pm_runtime_get_sync(dev);
/*-------------- spin lock -----------------*/
spin_lock_irqsave(&priv->lock, flags);
rcar_i2c_init(priv);
/* start clock */
rcar_i2c_write(priv, ICCCR, priv->icccr);
spin_unlock_irqrestore(&priv->lock, flags);
/*-------------- spin unlock -----------------*/
ret = rcar_i2c_bus_barrier(priv);
if (ret < 0)
goto out;
@ -488,9 +473,6 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap,
break;
}
/*-------------- spin lock -----------------*/
spin_lock_irqsave(&priv->lock, flags);
/* init each data */
priv->msg = &msgs[i];
priv->pos = 0;
@ -500,9 +482,6 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap,
ret = rcar_i2c_prepare_msg(priv);
spin_unlock_irqrestore(&priv->lock, flags);
/*-------------- spin unlock -----------------*/
if (ret < 0)
break;
@ -614,7 +593,6 @@ static int rcar_i2c_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
init_waitqueue_head(&priv->wait);
spin_lock_init(&priv->lock);
adap = &priv->adap;
adap->nr = pdev->id;