patches/openwrt: gpio mpc8xxx: fix support for IRQ: present in 5.15.70

patches/openwrt/to-upstream/0053-gpio-mpc8xxx-Fix-support-for-IRQ_TYPE_LEVEL_LOW-flow.patch

-From 0f0d568ed2d6e022b7f6f12eca6b7ef52331f591 Mon Sep 17 00:00:00 2001
-From: Josef Schlehofer <pepe.schlehofer@gmail.com>
-Date: Tue, 6 Sep 2022 13:17:02 +0200
-Subject: [PATCH] mpc85xx: add patch to fix gpio mpc8xxx
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Backports patch, which is currently on review [1] for kernel 5.10 and
-kernel 5.15, where it applies cleanly. This was tested on CZ.NIC Turris
-1.1 router running OpenWrt 21.02.03 with kernel 5.15.
-
-Before:
-
-- In /var/log/messages:
-```
-[   16.392988] lm90 0-004c: cannot request IRQ 48
-[   16.398280] lm90: probe of 0-004c failed with error -22
-```
-
-- Sensors does not work:
-```
-root@turris:~# sensors
-No sensors found!
-Make sure you loaded all the kernel drivers you need.
-Try sensors-detect to find out which these are.
-```
-
-After:
-
-```
-root@turris:/# sensors
-sa56004-i2c-0-4c
-Adapter: MPC adapter (i2c@3000)
-temp1:        +44.0°C  (low  =  +0.0°C, high = +70.0°C)
-                       (crit = +85.0°C, hyst = +75.0°C)
-temp2:        +73.8°C  (low  =  +0.0°C, high = +70.0°C)  ALARM (HIGH)
-                       (crit = +85.0°C, hyst = +75.0°C)
-```
-
-[1] https://lore.kernel.org/linux-gpio/20220906105431.30911-1-pali@kernel.org/
-
-Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>
----
- ...-support-for-IRQ_TYPE_LEVEL_LOW-flow.patch | 42 +++++++++++++++++++
- ...-support-for-IRQ_TYPE_LEVEL_LOW-flow.patch | 42 +++++++++++++++++++
- 2 files changed, 84 insertions(+)
- create mode 100644 target/linux/mpc85xx/patches-5.10/110-gpio-mpc8xxx-Fix-support-for-IRQ_TYPE_LEVEL_LOW-flow.patch
- create mode 100644 target/linux/mpc85xx/patches-5.15/110-gpio-mpc8xxx-Fix-support-for-IRQ_TYPE_LEVEL_LOW-flow.patch
-
-diff --git a/target/linux/mpc85xx/patches-5.10/110-gpio-mpc8xxx-Fix-support-for-IRQ_TYPE_LEVEL_LOW-flow.patch b/target/linux/mpc85xx/patches-5.10/110-gpio-mpc8xxx-Fix-support-for-IRQ_TYPE_LEVEL_LOW-flow.patch
-new file mode 100644
-index 0000000000..c4d7a5d5af
---- /dev/null
-+++ b/target/linux/mpc85xx/patches-5.10/110-gpio-mpc8xxx-Fix-support-for-IRQ_TYPE_LEVEL_LOW-flow.patch
-@@ -0,0 +1,42 @@
-+From 29af30435022442ec4eccf3166956b8e0b8a2134 Mon Sep 17 00:00:00 2001
-+From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
-+Date: Mon, 5 Sep 2022 23:13:47 +0200
-+Subject: [PATCH] gpio: mpc8xxx: Fix support for IRQ_TYPE_LEVEL_LOW flow_type
-+ in mpc85xx
-+MIME-Version: 1.0
-+Content-Type: text/plain; charset=UTF-8
-+Content-Transfer-Encoding: 8bit
-+
-+Commit e39d5ef67804 ("powerpc/5xxx: extend mpc8xxx_gpio driver to support
-+mpc512x gpios") implemented support for IRQ_TYPE_LEVEL_LOW flow type in
-+mpc512x via falling edge type. Do same for mpc85xx which support was added
-+in commit 345e5c8a1cc3 ("powerpc: Add interrupt support to mpc8xxx_gpio").
-+
-+Fixes probing of lm90 hwmon driver on mpc85xx based board which use level
-+interrupt. Without it kernel prints error and refuse lm90 to work:
-+
-+    [   15.258370] genirq: Setting trigger mode 8 for irq 49 failed (mpc8xxx_irq_set_type+0x0/0xf8)
-+    [   15.267168] lm90 0-004c: cannot request IRQ 49
-+    [   15.272708] lm90: probe of 0-004c failed with error -22
-+
-+Fixes: 345e5c8a1cc3 ("powerpc: Add interrupt support to mpc8xxx_gpio")
-+Signed-off-by: Pali Rohár <pali@kernel.org>
-+---
-+ drivers/gpio/gpio-mpc8xxx.c | 1 +
-+ 1 file changed, 1 insertion(+)
-+
-+diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
-+index d60d5520707d..60c2533a39a5 100644
-+--- a/drivers/gpio/gpio-mpc8xxx.c
-++++ b/drivers/gpio/gpio-mpc8xxx.c
-+@@ -169,6 +169,7 @@ static int mpc8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
-+ 
-+ 	switch (flow_type) {
-+ 	case IRQ_TYPE_EDGE_FALLING:
-++	case IRQ_TYPE_LEVEL_LOW:
-+ 		raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
-+ 		gc->write_reg(mpc8xxx_gc->regs + GPIO_ICR,
-+ 			gc->read_reg(mpc8xxx_gc->regs + GPIO_ICR)
-+-- 
-+2.34.1
-+
-diff --git a/target/linux/mpc85xx/patches-5.15/110-gpio-mpc8xxx-Fix-support-for-IRQ_TYPE_LEVEL_LOW-flow.patch b/target/linux/mpc85xx/patches-5.15/110-gpio-mpc8xxx-Fix-support-for-IRQ_TYPE_LEVEL_LOW-flow.patch
-new file mode 100644
-index 0000000000..7a4075abfe
---- /dev/null
-+++ b/target/linux/mpc85xx/patches-5.15/110-gpio-mpc8xxx-Fix-support-for-IRQ_TYPE_LEVEL_LOW-flow.patch
-@@ -0,0 +1,42 @@
-+From 5239046ec6af9d61429db246107289de8f43b067 Mon Sep 17 00:00:00 2001
-+From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
-+Date: Mon, 5 Sep 2022 23:13:47 +0200
-+Subject: [PATCH] gpio: mpc8xxx: Fix support for IRQ_TYPE_LEVEL_LOW flow_type
-+ in mpc85xx
-+MIME-Version: 1.0
-+Content-Type: text/plain; charset=UTF-8
-+Content-Transfer-Encoding: 8bit
-+
-+Commit e39d5ef67804 ("powerpc/5xxx: extend mpc8xxx_gpio driver to support
-+mpc512x gpios") implemented support for IRQ_TYPE_LEVEL_LOW flow type in
-+mpc512x via falling edge type. Do same for mpc85xx which support was added
-+in commit 345e5c8a1cc3 ("powerpc: Add interrupt support to mpc8xxx_gpio").
-+
-+Fixes probing of lm90 hwmon driver on mpc85xx based board which use level
-+interrupt. Without it kernel prints error and refuse lm90 to work:
-+
-+    [   15.258370] genirq: Setting trigger mode 8 for irq 49 failed (mpc8xxx_irq_set_type+0x0/0xf8)
-+    [   15.267168] lm90 0-004c: cannot request IRQ 49
-+    [   15.272708] lm90: probe of 0-004c failed with error -22
-+
-+Fixes: 345e5c8a1cc3 ("powerpc: Add interrupt support to mpc8xxx_gpio")
-+Signed-off-by: Pali Rohár <pali@kernel.org>
-+---
-+ drivers/gpio/gpio-mpc8xxx.c | 1 +
-+ 1 file changed, 1 insertion(+)
-+
-+diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
-+index a964e25ea620..763256efddc2 100644
-+--- a/drivers/gpio/gpio-mpc8xxx.c
-++++ b/drivers/gpio/gpio-mpc8xxx.c
-+@@ -172,6 +172,7 @@ static int mpc8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
-+ 
-+ 	switch (flow_type) {
-+ 	case IRQ_TYPE_EDGE_FALLING:
-++	case IRQ_TYPE_LEVEL_LOW:
-+ 		raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
-+ 		gc->write_reg(mpc8xxx_gc->regs + GPIO_ICR,
-+ 			gc->read_reg(mpc8xxx_gc->regs + GPIO_ICR)
-+-- 
-+2.34.1
-+
--- 
-2.34.1
-