This patch adds a function to read a signed integer from the uboot environment for the Micrel ksz9031 Phy driver to read postive and negatice skew values from the uboot environment.
Signed-off-by: Vince Bridgers vbridger@opensource.altera.com --- common/cmd_nvedit.c | 22 +++++++++++++++++++++- include/common.h | 1 + 2 files changed, 22 insertions(+), 1 deletion(-)
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c index 855808c..ec23696 100644 --- a/common/cmd_nvedit.c +++ b/common/cmd_nvedit.c @@ -665,7 +665,27 @@ int getenv_f(const char *name, char *buf, unsigned len) }
/** - * Decode the integer value of an environment variable and return it. + * Decode the signed integer value of an environment variable and return it. + * + * @param name Name of environemnt variable + * @param base Number base to use (normally 10, or 16 for hex) + * @param default_val Default value to return if the variable is not + * found + * @return the decoded value, or default_val if not found + */ +long getenv_long(const char *name, int base, long default_val) +{ + /* + * We can use getenv() here, even before relocation, since the + * environment variable value is an integer and thus short. + */ + const char *str = getenv(name); + + return str ? simple_strtol(str, NULL, base) : default_val; +} + +/** + * Decode the unsigned integer value of an environment variable and return it. * * @param name Name of environemnt variable * @param base Number base to use (normally 10, or 16 for hex) diff --git a/include/common.h b/include/common.h index 97c8f79..55a8cb3 100644 --- a/include/common.h +++ b/include/common.h @@ -304,6 +304,7 @@ int envmatch (uchar *, int); char *getenv (const char *); int getenv_f (const char *name, char *buf, unsigned len); ulong getenv_ulong(const char *name, int base, ulong default_val); +long getenv_long(const char *name, int base, long default_val);
/** * getenv_hex() - Return an environment variable as a hex value