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From:   Nathan Chancellor <natechancellor@gmail.com>
To:     Linus Walleij <linus.walleij@linaro.org>
Cc:     Orson Zhai <orsonzhai@gmail.com>,
        Baolin Wang <baolin.wang@linaro.org>,
        Chunyan Zhang <zhang.lyra@gmail.com>,
        linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
        Nick Desaulniers <ndesaulniers@google.com>,
        Nathan Chancellor <natechancellor@gmail.com>
Subject: [PATCH] pinctrl: sprd: Use define directive for sprd_pinconf_params values
Date:   Wed, 31 Oct 2018 17:44:10 -0700
Message-Id: <20181101004410.6893-1-natechancellor@gmail.com>
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Sender: linux-kernel-owner@vger.kernel.org
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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@gmail.com>
---
 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 4537b5453996..7d9a44bd0047 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)
-- 
2.19.1