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fastboot: add support for 'getvar platform'

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Our R-Car3 Android userspace relies on the output of 'fastboot
getvar platform' and U-Boot currently is not able to handle it:

host $> fastboot getvar platform
getvar:platform FAILED (remote: Variable not implemented)
finished. total time: 0.001s

We either have the option of adding 'fastboot.platform' variable
to the default/saved environment as a workaround or add proper
'fastboot getvar platform' support in U-Boot via this patch.
In the latter case, other platforms can benefit from it too.

Note that R-Car3 already exports 'platform' environment variable via
v2019.01 commit 00e4b57e9e ("ARM: rmobile: Set environment variable
containing CPU type").

Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
This commit is contained in:
Eugeniu Rosca 2019-04-09 21:11:40 +02:00 committed by Marek Vasut
parent b762aa126e
commit d73d9fb7e2
1 changed files with 14 additions and 0 deletions
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14
drivers/fastboot/fb_getvar.c
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@ -17,6 +17,7 @@ static void getvar_downloadsize(char *var_parameter, char *response);
static void getvar_serialno(char *var_parameter, char *response);
static void getvar_version_baseband(char *var_parameter, char *response);
static void getvar_product(char *var_parameter, char *response);
static void getvar_platform(char *var_parameter, char *response);
static void getvar_current_slot(char *var_parameter, char *response);
static void getvar_slot_suffixes(char *var_parameter, char *response);
static void getvar_has_slot(char *var_parameter, char *response);
@ -55,6 +56,9 @@ static const struct {
}, {
.variable = "product",
.dispatch = getvar_product
}, {
.variable = "platform",
.dispatch = getvar_platform
}, {
.variable = "current-slot",
.dispatch = getvar_current_slot
@ -117,6 +121,16 @@ static void getvar_product(char *var_parameter, char *response)
fastboot_fail("Board not set", response);
}
static void getvar_platform(char *var_parameter, char *response)
{
const char *p = env_get("platform");
if (p)
fastboot_okay(p, response);
else
fastboot_fail("platform not set", response);
}
static void getvar_current_slot(char *var_parameter, char *response)
{
/* A/B not implemented, for now always return _a */