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dm: core: Add a function to read into a unsigned int

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The current dev_read...() functions use s32 and u32 which are convenient
for device tree but not so useful for normal code, which often wants to
use normal integers for values.

Add a helper which supports returning an unsigned int. Also add signed
versions of the unsigned readers.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2018-12-10 10:37:37 -07:00
parent d490189865
commit a1b17e4f4c
4 changed files with 118 additions and 0 deletions
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58
include/dm/read.h
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@@ -64,6 +64,38 @@ int dev_read_u32(struct udevice *dev, const char *propname, u32 *outp);
*/
int dev_read_u32_default(struct udevice *dev, const char *propname, int def);
/**
* dev_read_s32() - read a signed 32-bit integer from a device's DT property
*
* @dev: device to read DT property from
* @propname: name of the property to read from
* @outp: place to put value (if found)
* @return 0 if OK, -ve on error
*/
int dev_read_s32(struct udevice *dev, const char *propname, s32 *outp);
/**
* dev_read_s32_default() - read a signed 32-bit int from a device's DT property
*
* @dev: device to read DT property from
* @propname: name of the property to read from
* @def: default value to return if the property has no value
* @return property value, or @def if not found
*/
int dev_read_s32_default(struct udevice *dev, const char *propname, int def);
/**
* dev_read_u32u() - read a 32-bit integer from a device's DT property
*
* This version uses a standard uint type.
*
* @dev: device to read DT property from
* @propname: name of the property to read from
* @outp: place to put value (if found)
* @return 0 if OK, -ve on error
*/
int dev_read_u32u(struct udevice *dev, const char *propname, uint *outp);
/**
* dev_read_string() - Read a string from a device's DT property
*
@@ -492,6 +524,32 @@ static inline int dev_read_u32_default(struct udevice *dev,
return ofnode_read_u32_default(dev_ofnode(dev), propname, def);
}
static inline int dev_read_s32(struct udevice *dev,
const char *propname, s32 *outp)
{
return ofnode_read_s32(dev_ofnode(dev), propname, outp);
}
static inline int dev_read_s32_default(struct udevice *dev,
const char *propname, int def)
{
return ofnode_read_s32_default(dev_ofnode(dev), propname, def);
}
static inline int dev_read_u32u(struct udevice *dev,
const char *propname, uint *outp)
{
u32 val;
int ret;
ret = ofnode_read_u32(dev_ofnode(dev), propname, &val);
if (ret)
return ret;
*outp = val;
return 0;
}
static inline const char *dev_read_string(struct udevice *dev,
const char *propname)
{