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dm: gpio: Refactor to prepare for live tree support

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Move the main part of the GPIO request function into a separate function
so that it can be used by the live tree function when added. Update the
xlate method to use a node reference.

Update all GPIO drivers to handle the modified xlate() method.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2017-05-18 20:09:18 -06:00
parent 6fb2f57916
commit 3a57123e59
8 changed files with 41 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpio/74x164_gpio.c
View File

@ -106,7 +106,7 @@ static int gen_74x164_get_function(struct udevice *dev, unsigned offset)
}
static int gen_74x164_xlate(struct udevice *dev, struct gpio_desc *desc,
struct fdtdec_phandle_args *args)
struct ofnode_phandle_args *args)
{
desc->offset = args->args[0];
desc->flags = args->args[1] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0;

51
drivers/gpio/gpio-uclass.c
View File

@ -114,9 +114,8 @@ int gpio_lookup_name(const char *name, struct udevice **devp,
return 0;
}
int gpio_xlate_offs_flags(struct udevice *dev,
struct gpio_desc *desc,
struct fdtdec_phandle_args *args)
int gpio_xlate_offs_flags(struct udevice *dev, struct gpio_desc *desc,
struct ofnode_phandle_args *args)
{
if (args->args_count < 1)
return -EINVAL;
@ -133,7 +132,7 @@ int gpio_xlate_offs_flags(struct udevice *dev,
}
static int gpio_find_and_xlate(struct gpio_desc *desc,
struct fdtdec_phandle_args *args)
struct ofnode_phandle_args *args)
{
struct dm_gpio_ops *ops = gpio_get_ops(desc->dev);
@ -642,37 +641,30 @@ int dm_gpio_get_values_as_int(const struct gpio_desc *desc_list, int count)
return vector;
}
static int _gpio_request_by_name_nodev(const void *blob, int node,
const char *list_name, int index,
struct gpio_desc *desc, int flags,
bool add_index)
static int gpio_request_tail(int ret, ofnode node,
struct ofnode_phandle_args *args,
const char *list_name, int index,
struct gpio_desc *desc, int flags, bool add_index)
{
struct fdtdec_phandle_args args;
int ret;
desc->dev = NULL;
desc->offset = 0;
desc->flags = 0;
ret = fdtdec_parse_phandle_with_args(blob, node, list_name,
"#gpio-cells", 0, index, &args);
if (ret) {
debug("%s: fdtdec_parse_phandle_with_args failed\n", __func__);
if (ret)
goto err;
}
ret = uclass_get_device_by_of_offset(UCLASS_GPIO, args.node,
&desc->dev);
ret = uclass_get_device_by_ofnode(UCLASS_GPIO, args->node,
&desc->dev);
if (ret) {
debug("%s: uclass_get_device_by_of_offset failed\n", __func__);
goto err;
}
ret = gpio_find_and_xlate(desc, &args);
ret = gpio_find_and_xlate(desc, args);
if (ret) {
debug("%s: gpio_find_and_xlate failed\n", __func__);
goto err;
}
ret = dm_gpio_requestf(desc, add_index ? "%s.%s%d" : "%s.%s",
fdt_get_name(blob, node, NULL),
ofnode_get_name(node),
list_name, index);
if (ret) {
debug("%s: dm_gpio_requestf failed\n", __func__);
@ -687,10 +679,27 @@ static int _gpio_request_by_name_nodev(const void *blob, int node,
return 0;
err:
debug("%s: Node '%s', property '%s', failed to request GPIO index %d: %d\n",
__func__, fdt_get_name(blob, node, NULL), list_name, index, ret);
__func__, ofnode_get_name(node), list_name, index, ret);
return ret;
}
static int _gpio_request_by_name_nodev(const void *blob, int node,
const char *list_name, int index,
struct gpio_desc *desc, int flags,
bool add_index)
{
struct ofnode_phandle_args args;
int ret;
ret = ofnode_parse_phandle_with_args(offset_to_ofnode(node), list_name,
"#gpio-cells", 0, index, &args);
if (ret)
debug("%s: fdtdec_parse_phandle_with_args failed\n", __func__);
return gpio_request_tail(ret, offset_to_ofnode(node), &args, list_name,
index, desc, flags, add_index);
}
int gpio_request_by_name_nodev(const void *blob, int node,
const char *list_name, int index,
struct gpio_desc *desc, int flags)

2
drivers/gpio/pca953x_gpio.c
View File

@ -228,7 +228,7 @@ static int pca953x_get_function(struct udevice *dev, unsigned offset)
}
static int pca953x_xlate(struct udevice *dev, struct gpio_desc *desc,
struct fdtdec_phandle_args *args)
struct ofnode_phandle_args *args)
{
desc->offset = args->args[0];
desc->flags = args->args[1] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0;

3
drivers/gpio/sandbox.c
View File

@ -8,6 +8,7 @@
#include <fdtdec.h>
#include <malloc.h>
#include <asm/gpio.h>
#include <dm/of.h>
#include <dt-bindings/gpio/gpio.h>
DECLARE_GLOBAL_DATA_PTR;
@ -165,7 +166,7 @@ static int sb_gpio_get_function(struct udevice *dev, unsigned offset)
}
static int sb_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
struct fdtdec_phandle_args *args)
struct ofnode_phandle_args *args)
{
desc->offset = args->args[0];
if (args->args_count < 2)

2
drivers/gpio/sunxi_gpio.c
View File

@ -217,7 +217,7 @@ static int sunxi_gpio_get_function(struct udevice *dev, unsigned offset)
}
static int sunxi_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
struct fdtdec_phandle_args *args)
struct ofnode_phandle_args *args)
{
int ret;

2
drivers/gpio/tegra186_gpio.c
View File

@ -139,7 +139,7 @@ static int tegra186_gpio_get_function(struct udevice *dev, unsigned offset)
}
static int tegra186_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
struct fdtdec_phandle_args *args)
struct ofnode_phandle_args *args)
{
int gpio, port, ret;

2
drivers/gpio/tegra_gpio.c
View File

@ -236,7 +236,7 @@ static int tegra_gpio_get_function(struct udevice *dev, unsigned offset)
}
static int tegra_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
struct fdtdec_phandle_args *args)
struct ofnode_phandle_args *args)
{
int gpio, port, ret;

6
include/asm-generic/gpio.h
View File

@ -7,6 +7,8 @@
#ifndef _ASM_GENERIC_GPIO_H_
#define _ASM_GENERIC_GPIO_H_
struct ofnode_phandle_args;
/*
* Generic GPIO API for U-Boot
*
@ -214,7 +216,7 @@ struct fdtdec_phandle_args;
*
*/
int gpio_xlate_offs_flags(struct udevice *dev, struct gpio_desc *desc,
struct fdtdec_phandle_args *args);
struct ofnode_phandle_args *args);
/**
* struct struct dm_gpio_ops - Driver model GPIO operations
@ -286,7 +288,7 @@ struct dm_gpio_ops {
* @return 0 if OK, -ve on error
*/
int (*xlate)(struct udevice *dev, struct gpio_desc *desc,
struct fdtdec_phandle_args *args);
struct ofnode_phandle_args *args);
};
/**