linux-kernel - [PATCH] pinctrl: sprd: Add CM4 sleep mode support

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Date:   Wed, 16 Oct 2019 20:23:39 +0800
From:   Baolin Wang <baolin.wang@...aro.org>
To:     linus.walleij@...aro.org
Cc:     orsonzhai@...il.com, zhang.lyra@...il.com, baolin.wang@...aro.org,
        bruce.chen@...soc.com, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] pinctrl: sprd: Add CM4 sleep mode support

From: Bruce Chen <bruce.chen@...soc.com>

For the new Spreadtrum pin controller, it expands 6bits to describe the
pin sleep mode with adding one CM4_SLEEP mode, which means the pin sleep
related configuration will be loaded automatically by hardware when the
CM4 system goes into deep sleep mode.

Signed-off-by: Bruce Chen <bruce.chen@...soc.com>
Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
---
 drivers/pinctrl/sprd/pinctrl-sprd.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/sprd/pinctrl-sprd.c b/drivers/pinctrl/sprd/pinctrl-sprd.c
index 8869843..157712ab 100644
--- a/drivers/pinctrl/sprd/pinctrl-sprd.c
+++ b/drivers/pinctrl/sprd/pinctrl-sprd.c
@@ -41,7 +41,8 @@
 #define PUBCP_SLEEP_MODE		BIT(14)
 #define TGLDSP_SLEEP_MODE		BIT(15)
 #define AGDSP_SLEEP_MODE		BIT(16)
-#define SLEEP_MODE_MASK			GENMASK(3, 0)
+#define CM4_SLEEP_MODE			BIT(17)
+#define SLEEP_MODE_MASK			GENMASK(5, 0)
 #define SLEEP_MODE_SHIFT		13
 
 #define SLEEP_INPUT			BIT(1)
@@ -81,6 +82,7 @@ enum pin_sleep_mode {
 	PUBCP_SLEEP = BIT(1),
 	TGLDSP_SLEEP = BIT(2),
 	AGDSP_SLEEP = BIT(3),
+	CM4_SLEEP = BIT(4),
 };
 
 enum pin_func_sel {
@@ -616,6 +618,8 @@ static int sprd_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin_id,
 					val |= TGLDSP_SLEEP_MODE;
 				if (arg & AGDSP_SLEEP)
 					val |= AGDSP_SLEEP_MODE;
+				if (arg & CM4_SLEEP)
+					val |= CM4_SLEEP_MODE;
 
 				mask = SLEEP_MODE_MASK;
 				shift = SLEEP_MODE_SHIFT;
-- 
1.7.9.5