[PATCH V2 1/4] gpio: sprd: In the sleep state, the eic debounce clk must be forced open

From: Wenhua Lin
Date: Thu Sep 21 2023 - 13:52:00 EST


In the sleep state, Eic debounce has no clock and the clk of
debounce needs to be forced open, so that eic can wake up normally.

Fixes: 2788938b7946 ("gpio: eic-sprd: Make the irqchip immutable")

Signed-off-by: Wenhua Lin <Wenhua.Lin@xxxxxxxxxx>
---
drivers/gpio/gpio-eic-sprd.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
index 84352a6f4973..bfa8a4c7515a 100644
--- a/drivers/gpio/gpio-eic-sprd.c
+++ b/drivers/gpio/gpio-eic-sprd.c
@@ -23,6 +23,7 @@
#define SPRD_EIC_DBNC_IC 0x24
#define SPRD_EIC_DBNC_TRIG 0x28
#define SPRD_EIC_DBNC_CTRL0 0x40
+#define SPRD_EIC_DBNC_FORCE_CLK 0x8000

#define SPRD_EIC_LATCH_INTEN 0x0
#define SPRD_EIC_LATCH_INTRAW 0x4
@@ -214,6 +215,7 @@ static int sprd_eic_set_debounce(struct gpio_chip *chip, unsigned int offset,
u32 value = readl_relaxed(base + reg) & ~SPRD_EIC_DBNC_MASK;

value |= (debounce / 1000) & SPRD_EIC_DBNC_MASK;
+ value |= SPRD_EIC_DBNC_FORCE_CLK;
writel_relaxed(value, base + reg);

return 0;
--
2.17.1