pinctrl: disallow map table entries with NULL dev_name field

Hog entries are mapping table entries with .ctrl_dev_name == .dev_name.
All other mapping table entries need .dev_name set so that they will
match some pinctrl_get() call. All extant PIN_MAP*() macros set
.dev_name.

So, there is no reason to allow mapping table entries without .dev_name
set. Update the code and documentation to disallow this.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 0 insertions, 7 deletions

diff --git a/include/linux/pinctrl/machine.h b/include/linux/pinctrl/machine.h
index af145d571970..400f1926b234 100644
--- a/include/linux/pinctrl/machine.h
+++ b/include/linux/pinctrl/machine.h
@@ -46,13 +46,6 @@ struct pinctrl_map {
         { .name = a, .ctrl_dev_name = b, .function = c, .dev_name = d }
 
 /*
- * Convenience macro to map a system function onto a certain pinctrl device.
- * System functions are not assigned to a particular device.
- */
-#define PIN_MAP_SYS(a, b, c) \
-        { .name = a, .ctrl_dev_name = b, .function = c }
-
-/*
  * Convenience macro to map a system function onto a certain pinctrl device,
  * to be hogged by the pin control core until the system shuts down.
  */