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authorJosef Schlehofer <pepe.schlehofer@gmail.com>2022-09-06 13:17:02 +0200
committerChristian Lamparter <chunkeey@gmail.com>2022-09-24 17:53:52 +0200
commitdafac183f3c661c939a1d556da0e81df5540bcf1 (patch)
treee565b2125d937d0702e0730f3e873aa0d0ff9711 /target/linux/mpc85xx
parent7707b47c7277e319303685b12911f5a20bd422dd (diff)
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mpc85xx: add patch to fix gpio mpc8xxx
Backports Linux kernel patch [1] for kernel 5.10 where it applies cleanly. This was tested on CZ.NIC Turris 1.1 router running OpenWrt 22.03 release. 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> (cherry picked from commit 2f496c34b6dfbedbfbff8d2ade5d629f096e40bd) (c&p commit ID from openwrt's master) Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Diffstat (limited to 'target/linux/mpc85xx')
-rw-r--r--target/linux/mpc85xx/patches-5.10/110-gpio-mpc8xxx-Fix-support-for-IRQ_TYPE_LEVEL_LOW-flow.patch42
1 files changed, 42 insertions, 0 deletions
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
+