From 9df91263204b8a9a4c506fd75e06b83236fdc56e Mon Sep 17 00:00:00 2001 From: Shiji Yang Date: Sat, 29 Jul 2023 21:24:10 +0800 Subject: [PATCH] ramips: pinctrl: support requesting different functions for same group MT7620 wireless radio needs change the pin group function between "gpio" and "pa" during the calibration process. However, ralink pinctrl driver doesn't support requesting different functions for the same group. This patch enables pinctrl consumers to perform such operations. Signed-off-by: Shiji Yang (cherry picked from commit b4ea49ad442d2884d0b86009f404f125635c4153) --- ...upport-requesting-different-function.patch | 45 +++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 target/linux/ramips/patches-5.15/808-pinctrl-mtmips-support-requesting-different-function.patch 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 +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 +--- + 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; -- 2.30.2