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FMC DEL 1ns 4cha - Software
Commit fcfbbec3 authored by Alessandro Rubini's avatar Alessandro Rubini
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kernel/i2c.c: add delays for bit-banging interface 

Signed-off-by: Alessandro Rubini's avatarAlessandro Rubini <rubini@gnudd.com>
parent 1fe86aa9
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kernel/i2c.c
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......@@ -14,6 +14,7 @@
#include <linux/io.h>
#include <linux/time.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/random.h>
#include "fine-delay.h"
#include "hw/fd_main_regs.h"
......@@ -26,6 +27,7 @@ static void set_sda(struct fd_dev *fd, int val)
if (val)
reg |= FD_I2CR_SDA_OUT;
fd_writel(fd, reg, FD_REG_I2CR);
ndelay(1250); /* 400kHz -> 2.5us/loop */
}
static void set_scl(struct fd_dev *fd, int val)
......@@ -36,6 +38,7 @@ static void set_scl(struct fd_dev *fd, int val)
if (val)
reg |= FD_I2CR_SCL_OUT;
fd_writel(fd, reg, FD_REG_I2CR);
ndelay(1250); /* 400kHz -> 2.5us/loop */
}
static int get_sda(struct fd_dev *fd)
......
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