mfd: stmpe: Support disabling sub-functions

Add support of sub-functions disabling. It allows one to define
an stmpe sub-function device in devicetree, but keep it disabled.

Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20211027082155.206449-1-francesco.dolcini@toradex.com

diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
index e928df9..aeb9ea5 100644 (file)
--- a/drivers/mfd/stmpe.c
+++ b/drivers/mfd/stmpe.c
@@ -1361,7 +1361,7 @@ static void stmpe_of_probe(struct stmpe_platform_data *pdata,
 
        pdata->autosleep = (pdata->autosleep_timeout) ? true : false;
 
-       for_each_child_of_node(np, child) {
+       for_each_available_child_of_node(np, child) {
                if (of_node_name_eq(child, "stmpe_gpio")) {
                        pdata->blocks |= STMPE_BLOCK_GPIO;
                } else if (of_node_name_eq(child, "stmpe_keypad")) {