From dafac183f3c661c939a1d556da0e81df5540bcf1 Mon Sep 17 00:00:00 2001 From: Josef Schlehofer 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=utf8 Content-Transfer-Encoding: 8bit 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 (cherry picked from commit 2f496c34b6dfbedbfbff8d2ade5d629f096e40bd) (c&p commit ID from openwrt's master) Signed-off-by: Christian Lamparter --- ...-support-for-IRQ_TYPE_LEVEL_LOW-flow.patch | 42 +++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 target/linux/mpc85xx/patches-5.10/110-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?= +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 +--- + 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 + -- 2.30.2