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From:   Wenhua Lin <Wenhua.Lin@unisoc.com>
To:     Linus Walleij <linus.walleij@linaro.org>,
        Bartosz Golaszewski <brgl@bgdev.pl>,
        Andy Shevchenko <andy@kernel.org>,
        Orson Zhai <orsonzhai@gmail.com>,
        Baolin Wang <baolin.wang@linux.alibaba.com>,
        Chunyan Zhang <zhang.lyra@gmail.com>
CC:     <linux-serial@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        wenhua lin <wenhua.lin1994@gmail.com>,
        Wenhua Lin <Wenhua.Lin@unisoc.com>,
        Xiongpeng Wu <xiongpeng.wu@unisoc.com>
Subject: [PATCH 2/3] gpio: sprd: In the sleep state, the eic dbnc clk must be forced open
Date:   Tue, 8 Aug 2023 11:31:30 +0800
Message-ID: <20230808033130.2226-1-Wenhua.Lin@unisoc.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

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@unisoc.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