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dm: imx: i2c: Use gpio_request() to request GPIOs 

GPIOs should be requested before use. Without this, driver model will
not permit the GPIO to be used.

Cc: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
This commit is contained in:
Simon Glass 2014-10-02 17:17:23 +03:00
parent edbf8b4f8c
commit c6f3f32356
1 changed files with 25 additions and 0 deletions
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25
arch/arm/imx-common/i2c-mxv7.c
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@ -4,6 +4,7 @@
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <malloc.h>
#include <asm/arch/clock.h>
#include <asm/arch/imx-regs.h>
#include <asm/errno.h>
@ -72,10 +73,27 @@ static void * const i2c_bases[] = {
int setup_i2c(unsigned i2c_index, int speed, int slave_addr,
struct i2c_pads_info *p)
{
char *name1, *name2;
int ret;
if (i2c_index >= ARRAY_SIZE(i2c_bases))
return -EINVAL;
name1 = malloc(9);
name2 = malloc(9);
if (!name1 || !name2)
return -ENOMEM;
sprintf(name1, "i2c_sda%d", i2c_index);
sprintf(name2, "i2c_scl%d", i2c_index);
ret = gpio_request(p->sda.gp, name1);
if (ret)
goto err_req1;
ret = gpio_request(p->scl.gp, name2);
if (ret)
goto err_req2;
/* Enable i2c clock */
ret = enable_i2c_clk(1, i2c_index);
if (ret)
@ -93,5 +111,12 @@ int setup_i2c(unsigned i2c_index, int speed, int slave_addr,
err_idle:
err_clk:
gpio_free(p->scl.gp);
err_req2:
gpio_free(p->sda.gp);
err_req1:
free(name1);
free(name2);
return ret;
}