env: export getenv_ullx() helper

getenv_ull() will parse values according to prefix:

  - If it starts with 0x, it's hexadecimal
  - If it's just 0, it's octal
  - otherwise, it's decimal

Some variables like i.MX8M soc0.soc_uid are hexadecimal without leading
0x. Therefore add a getenv_ullx helper, so code that used to do:

  uid = imx8m_uid();

can be replaced with

  getenv_ullx("soc0.soc_uid", &uid);

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20240228175128.2734265-2-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 19 insertions, 2 deletions

diff --git a/common/env.c b/common/env.c
index d673b061ab..7a213cadb2 100644
--- a/common/env.c
+++ b/common/env.c
@@ -343,19 +343,30 @@ const char *getenv_nonempty(const char *var)
 }
 EXPORT_SYMBOL(getenv_nonempty);
 
-int getenv_ull(const char *var , unsigned long long *val)
+static int getenv_ull_base(const char *var, int base, unsigned long long *val)
 {
 	const char *valstr = getenv(var);
 
 	if (!valstr || !*valstr)
 		return -EINVAL;
 
-	*val = simple_strtoull(valstr, NULL, 0);
+	*val = simple_strtoull(valstr, NULL, base);
 
 	return 0;
 }
+
+int getenv_ull(const char *var , unsigned long long *val)
+{
+	return getenv_ull_base(var, 0, val);
+}
 EXPORT_SYMBOL(getenv_ull);
 
+int getenv_ullx(const char *var , unsigned long long *val)
+{
+	return getenv_ull_base(var, 16, val);
+}
+EXPORT_SYMBOL(getenv_ullx);
+
 int getenv_ul(const char *var , unsigned long *val)
 {
 	const char *valstr = getenv(var);
diff --git a/include/environment.h b/include/environment.h
index 1557c3a1d7..8b143c16b7 100644
--- a/include/environment.h
+++ b/include/environment.h
@@ -35,6 +35,7 @@ int setenv(const char *, const char *);
 int pr_setenv(const char *, const char *fmt, ...)  __attribute__ ((format(__printf__, 2, 3)));
 void export_env_ull(const char *name, unsigned long long val);
 int getenv_ull(const char *name, unsigned long long *val);
+int getenv_ullx(const char *name, unsigned long long *val);
 int getenv_ul(const char *name, unsigned long *val);
 int getenv_uint(const char *name, unsigned int *val);
 int getenv_bool(const char *var, int *val);
@@ -63,6 +64,11 @@ static inline int getenv_ull(const char *name, unsigned long long *val)
 	return -EINVAL;
 }
 
+static inline int getenv_ullx(const char *name, unsigned long long *val)
+{
+	return -EINVAL;
+}
+
 static inline int getenv_ul(const char *name, unsigned long *val)
 {
 	return -EINVAL;