korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-04 01:24:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

i2c: imx: Make disable_delay a per-device variable

Browse Source 
'disable_delay' was static which is wrong as it is calculated using the per-device
bus speed. This patch turns 'disable_delay' into a per-device variable.

Reported-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Darius Augulis <augulis.darius@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Wolfram Sang 2009-04-06 16:27:45 +02:00 committed by Ben Dooks
parent b486ddbc0f
commit 65de394df2
1 changed files with 3 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/i2c/busses/i2c-imx.c
View File

@ -86,8 +86,6 @@
/** Variables ******************************************************************
*******************************************************************************/
static unsigned int disable_delay; /* Dummy delay */
/*
* sorted list of clock divider, register value pairs
* taken from table 26-5, p.26-9, Freescale i.MX
@ -121,6 +119,7 @@ struct imx_i2c_struct {
int irq;
wait_queue_head_t queue;
unsigned long i2csr;
unsigned int disable_delay;
};
/** Functions for IMX I2C adapter driver ***************************************
@ -212,7 +211,7 @@ static void i2c_imx_stop(struct imx_i2c_struct *i2c_imx)
* This delay caused by an i.MXL hardware bug.
* If no (or too short) delay, no "STOP" bit will be generated.
*/
udelay(disable_delay);
udelay(i2c_imx->disable_delay);
/* Disable I2C controller */
writeb(0, i2c_imx->base + IMX_I2C_I2CR);
}
@ -243,7 +242,7 @@ static void __init i2c_imx_set_clk(struct imx_i2c_struct *i2c_imx,
* This delay is used in I2C bus disable function
* to fix chip hardware bug.
*/
disable_delay = (500000U * i2c_clk_div[i][0]
i2c_imx->disable_delay = (500000U * i2c_clk_div[i][0]
+ (i2c_clk_rate / 2) - 1) / (i2c_clk_rate / 2);
/* dev_dbg() can't be used, because adapter is not yet registered */