linux-kernel - [PATCH 2/3] gpio: sprd: In the sleep state, the eic dbnc clk must be forced open

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Date:   Tue, 8 Aug 2023 11:31:30 +0800
From:   Wenhua Lin <Wenhua.Lin@...soc.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Andy Shevchenko <andy@...nel.org>,
        Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        Chunyan Zhang <zhang.lyra@...il.com>
CC:     <linux-serial@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        wenhua lin <wenhua.lin1994@...il.com>,
        Wenhua Lin <Wenhua.Lin@...soc.com>,
        Xiongpeng Wu <xiongpeng.wu@...soc.com>
Subject: [PATCH 2/3] gpio: sprd: In the sleep state, the eic dbnc clk must be forced open

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

Signed-off-by: Wenhua Lin <Wenhua.Lin@...soc.com>
---
 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 0d85d9e80848..c506cfd6df8e 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
@@ -213,6 +214,7 @@ 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