From: Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
To: Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Virupax Sadashivpetimath
<virupax.sadashivpetimath-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>,
Linus Walleij
<linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Subject: [PATCH 11/14] i2c/i2c-nomadik: remove the unnecessary delay
Date: Fri, 13 May 2011 12:30:42 +0200 [thread overview]
Message-ID: <1305282642-20864-1-git-send-email-linus.walleij@linaro.org> (raw)
From: Virupax Sadashivpetimath <virupax.sadashivpetimath-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
The delay in the driver seems to be not needed, so remove it.
Signed-off-by: Virupax Sadashivpetimath <virupax.sadashivpetimath-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
Reviewed-by: Markus Grape <markus.grape-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
Tested-by: Per Persson <per.xb.persson-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
Tested-by: Chethan Krishna N <chethan.krishna-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
Reviewed-by: Srinidhi Kasagar <srinidhi.kasagar-0IS4wlFg1OjSUeElwK9/Pw@public.gmane.org>
Signed-off-by: Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
drivers/i2c/busses/i2c-nomadik.c | 20 ++------------------
1 files changed, 2 insertions(+), 18 deletions(-)
diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
index e3cd62e..b2de1a5 100644
--- a/drivers/i2c/busses/i2c-nomadik.c
+++ b/drivers/i2c/busses/i2c-nomadik.c
@@ -15,7 +15,6 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
-#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
@@ -105,9 +104,6 @@
/* maximum threshold value */
#define MAX_I2C_FIFO_THRESHOLD 15
-/* per-transfer delay, required for the hardware to stabilize */
-#define I2C_DELAY 150
-
enum i2c_status {
I2C_NOP,
I2C_ON_GOING,
@@ -269,12 +265,6 @@ static int init_hw(struct nmk_i2c_dev *dev)
dev->cli.operation = I2C_NO_OPERATION;
exit:
- /*
- * TODO: What is this delay for?
- * Must be pretty pointless since the hw block
- * is frozen. Or?
- */
- udelay(I2C_DELAY);
return stat;
}
@@ -652,7 +642,6 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap,
break;
}
- udelay(I2C_DELAY);
}
if (status == 0)
break;
@@ -778,13 +767,8 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg)
}
}
- i2c_set_bit(dev->virtbase + I2C_ICR, I2C_IT_MTD);
- i2c_set_bit(dev->virtbase + I2C_ICR, I2C_IT_MTDWS);
-
- disable_interrupts(dev,
- (I2C_IT_TXFNE | I2C_IT_TXFE | I2C_IT_TXFF
- | I2C_IT_TXFOVR | I2C_IT_RXFNF
- | I2C_IT_RXFF | I2C_IT_RXFE));
+ disable_all_interrupts(dev);
+ clear_all_interrupts(dev);
if (dev->cli.count) {
dev->result = -EIO;
--
1.7.5.1
reply other threads:[~2011-05-13 10:30 UTC|newest]
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