From 84aef4ed59705585d629e81d633a83b7d416f5fb Mon Sep 17 00:00:00 2001
From: Wenhua Lin <Wenhua.Lin@unisoc.com>
Date: Tue, 9 Jan 2024 15:38:48 +0800
Subject: [PATCH] gpio: eic-sprd: Clear interrupt after set the interrupt type
Git-commit: 84aef4ed59705585d629e81d633a83b7d416f5fb
Patch-mainline: v6.8-rc2
References: git-fixes
The raw interrupt status of eic maybe set before the interrupt is enabled,
since the eic interrupt has a latch function, which would trigger the
interrupt event once enabled it from user side. To solve this problem,
interrupts generated before setting the interrupt trigger type are ignored.
Fixes: 25518e024e3a ("gpio: Add Spreadtrum EIC driver support")
Acked-by: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Wenhua Lin <Wenhua.Lin@unisoc.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpio/gpio-eic-sprd.c | 32 ++++++++++++++++++++++++++++----
1 file changed, 28 insertions(+), 4 deletions(-)
diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
index be7f2fa5aa7b..806b88d8dfb7 100644
--- a/drivers/gpio/gpio-eic-sprd.c
+++ b/drivers/gpio/gpio-eic-sprd.c
@@ -330,20 +330,27 @@ static int sprd_eic_irq_set_type(struct irq_data *data, unsigned int flow_type)
switch (flow_type) {
case IRQ_TYPE_LEVEL_HIGH:
sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IEV, 1);
+ sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IC, 1);
break;
case IRQ_TYPE_LEVEL_LOW:
sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IEV, 0);
+ sprd_eic_update(chip, offset, SPRD_EIC_DBNC_IC, 1);
break;
case IRQ_TYPE_EDGE_RISING:
case IRQ_TYPE_EDGE_FALLING:
case IRQ_TYPE_EDGE_BOTH:
state = sprd_eic_get(chip, offset);
- if (state)
+ if (state) {
sprd_eic_update(chip, offset,
SPRD_EIC_DBNC_IEV, 0);
- else
+ sprd_eic_update(chip, offset,
+ SPRD_EIC_DBNC_IC, 1);
+ } else {
sprd_eic_update(chip, offset,
SPRD_EIC_DBNC_IEV, 1);
+ sprd_eic_update(chip, offset,
+ SPRD_EIC_DBNC_IC, 1);
+ }
break;
default:
return -ENOTSUPP;
@@ -355,20 +362,27 @@ static int sprd_eic_irq_set_type(struct irq_data *data, unsigned int flow_type)
switch (flow_type) {
case IRQ_TYPE_LEVEL_HIGH:
sprd_eic_update(chip, offset, SPRD_EIC_LATCH_INTPOL, 0);
+ sprd_eic_update(chip, offset, SPRD_EIC_LATCH_INTCLR, 1);
break;
case IRQ_TYPE_LEVEL_LOW:
sprd_eic_update(chip, offset, SPRD_EIC_LATCH_INTPOL, 1);
+ sprd_eic_update(chip, offset, SPRD_EIC_LATCH_INTCLR, 1);
break;
case IRQ_TYPE_EDGE_RISING:
case IRQ_TYPE_EDGE_FALLING:
case IRQ_TYPE_EDGE_BOTH:
state = sprd_eic_get(chip, offset);
- if (state)
+ if (state) {
sprd_eic_update(chip, offset,
SPRD_EIC_LATCH_INTPOL, 0);
- else
+ sprd_eic_update(chip, offset,
+ SPRD_EIC_LATCH_INTCLR, 1);
+ } else {
sprd_eic_update(chip, offset,
SPRD_EIC_LATCH_INTPOL, 1);
+ sprd_eic_update(chip, offset,
+ SPRD_EIC_LATCH_INTCLR, 1);
+ }
break;
default:
return -ENOTSUPP;
@@ -382,29 +396,34 @@ static int sprd_eic_irq_set_type(struct irq_data *data, unsigned int flow_type)
sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 0);
sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 1);
+ sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
irq_set_handler_locked(data, handle_edge_irq);
break;
case IRQ_TYPE_EDGE_FALLING:
sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 0);
sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 0);
+ sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
irq_set_handler_locked(data, handle_edge_irq);
break;
case IRQ_TYPE_EDGE_BOTH:
sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 0);
sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 1);
+ sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
irq_set_handler_locked(data, handle_edge_irq);
break;
case IRQ_TYPE_LEVEL_HIGH:
sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 1);
sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 1);
+ sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
irq_set_handler_locked(data, handle_level_irq);
break;
case IRQ_TYPE_LEVEL_LOW:
sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 1);
sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 0);
+ sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
irq_set_handler_locked(data, handle_level_irq);
break;
default:
@@ -417,29 +436,34 @@ static int sprd_eic_irq_set_type(struct irq_data *data, unsigned int flow_type)
sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 0);
sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 1);
+ sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
irq_set_handler_locked(data, handle_edge_irq);
break;
case IRQ_TYPE_EDGE_FALLING:
sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 0);
sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 0);
+ sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
irq_set_handler_locked(data, handle_edge_irq);
break;
case IRQ_TYPE_EDGE_BOTH:
sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 0);
sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 1);
+ sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
irq_set_handler_locked(data, handle_edge_irq);
break;
case IRQ_TYPE_LEVEL_HIGH:
sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 1);
sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 1);
+ sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
irq_set_handler_locked(data, handle_level_irq);
break;
case IRQ_TYPE_LEVEL_LOW:
sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 1);
sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 0);
+ sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
irq_set_handler_locked(data, handle_level_irq);
break;
default:
--
2.35.3