diff options
| -rw-r--r-- | target/linux/ramips/patches-5.15/808-pinctrl-mtmips-support-requesting-different-function.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-5.15/808-pinctrl-mtmips-support-requesting-different-function.patch b/target/linux/ramips/patches-5.15/808-pinctrl-mtmips-support-requesting-different-function.patch new file mode 100644 index 0000000000..047808f1e6 --- /dev/null +++ b/target/linux/ramips/patches-5.15/808-pinctrl-mtmips-support-requesting-different-function.patch @@ -0,0 +1,45 @@ +From: Shiji Yang <yangshiji66@outlook.com> +Date: Wed, 26 Jul 2023 01:32:55 +0800 +Subject: [PATCH] pinctrl: mtmips: support requesting different functions for + same group + +Sometimes pinctrl consumers may request different functions for the +same pin group in different situations. This patch can help to reset +the group function flag when requesting a different function. + +Signed-off-by: Shiji Yang <yangshiji66@outlook.com> +--- + drivers/pinctrl/ralink/pinctrl-ralink.c | 21 +++++++++++++++++---- + 1 file changed, 17 insertions(+), 4 deletions(-) + +--- a/drivers/pinctrl/ralink/pinctrl-ralink.c ++++ b/drivers/pinctrl/ralink/pinctrl-ralink.c +@@ -123,11 +123,24 @@ static int ralink_pmx_group_enable(struc + int i; + int shift; + +- /* dont allow double use */ ++ /* ++ * for the same pin group, if request a different function, ++ * then clear the group function flag and continue, else exit. ++ */ + if (p->groups[group].enabled) { +- dev_err(p->dev, "%s is already enabled\n", +- p->groups[group].name); +- return 0; ++ for (i = 0; i < p->groups[group].func_count; i++) { ++ if (p->groups[group].func[i].enabled == 1) { ++ if (!strcmp(p->func[func]->name, ++ p->groups[group].func[i].name)) ++ return 0; ++ p->groups[group].func[i].enabled = 0; ++ break; ++ } ++ } ++ ++ /* exit if request the "gpio" function again */ ++ if (i == p->groups[group].func_count && func == 0) ++ return 0; + } + + p->groups[group].enabled = 1; |