linux-kernel - [BACKPORT 4.14.y v3 2/3] pinctrl: sprd: Use define directive for sprd_pinconf

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Message-Id: <93a07f8a37d17bdfbda6bcc9fdb5032a724d5f10.1569405445.git.baolin.wang@linaro.org>
Date:   Wed, 25 Sep 2019 18:02:24 +0800
From:   Baolin Wang <baolin.wang@...aro.org>
To:     stable@...r.kernel.org, linus.walleij@...aro.org,
        natechancellor@...il.com
Cc:     linux-gpio@...r.kernel.org, arnd@...db.de, baolin.wang@...aro.org,
        orsonzhai@...il.com, vincent.guittot@...aro.org,
        linux-kernel@...r.kernel.org
Subject: [BACKPORT 4.14.y v3 2/3] pinctrl: sprd: Use define directive for sprd_pinconf_params values

From: Nathan Chancellor <natechancellor@...il.com>

[Upstream commit 957063c924736d4341e5d588757b9f31e8f6fa24]

Clang warns when one enumerated type is implicitly converted to another:

drivers/pinctrl/sprd/pinctrl-sprd.c:845:19: warning: implicit conversion
from enumeration type 'enum sprd_pinconf_params' to different
enumeration type 'enum pin_config_param' [-Wenum-conversion]
        {"sprd,control", SPRD_PIN_CONFIG_CONTROL, 0},
        ~                ^~~~~~~~~~~~~~~~~~~~~~~
drivers/pinctrl/sprd/pinctrl-sprd.c:846:22: warning: implicit conversion
from enumeration type 'enum sprd_pinconf_params' to different
enumeration type 'enum pin_config_param' [-Wenum-conversion]
        {"sprd,sleep-mode", SPRD_PIN_CONFIG_SLEEP_MODE, 0},
        ~                   ^~~~~~~~~~~~~~~~~~~~~~~~~~

It is expected that pinctrl drivers can extend pin_config_param because
of the gap between PIN_CONFIG_END and PIN_CONFIG_MAX so this conversion
isn't an issue. Most drivers that take advantage of this define the
PIN_CONFIG variables as constants, rather than enumerated values. Do the
same thing here so that Clang no longer warns.

Link: https://github.com/ClangBuiltLinux/linux/issues/138
Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
Reviewed-by: Baolin Wang <baolin.wang@...aro.org>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
---
 drivers/pinctrl/sprd/pinctrl-sprd.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/pinctrl/sprd/pinctrl-sprd.c b/drivers/pinctrl/sprd/pinctrl-sprd.c
index 6352991..83958bd 100644
--- a/drivers/pinctrl/sprd/pinctrl-sprd.c
+++ b/drivers/pinctrl/sprd/pinctrl-sprd.c
@@ -159,10 +159,8 @@ struct sprd_pinctrl {
 	struct sprd_pinctrl_soc_info *info;
 };
 
-enum sprd_pinconf_params {
-	SPRD_PIN_CONFIG_CONTROL = PIN_CONFIG_END + 1,
-	SPRD_PIN_CONFIG_SLEEP_MODE = PIN_CONFIG_END + 2,
-};
+#define SPRD_PIN_CONFIG_CONTROL		(PIN_CONFIG_END + 1)
+#define SPRD_PIN_CONFIG_SLEEP_MODE	(PIN_CONFIG_END + 2)
 
 static int sprd_pinctrl_get_id_by_name(struct sprd_pinctrl *sprd_pctl,
 				       const char *name)
-- 
1.7.9.5