linux-kernel - [PATCH v5 02/10] pinctrl: generic: Add macros to unpack properties

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Message-Id: <1493281194-5200-3-git-send-email-jacopo+renesas@jmondi.org>
Date:   Thu, 27 Apr 2017 10:19:46 +0200
From:   Jacopo Mondi <jacopo+renesas@...ndi.org>
To:     linus.walleij@...aro.org, geert+renesas@...der.be,
        laurent.pinchart@...asonboard.com, chris.brandt@...esas.com,
        robh+dt@...nel.org, mark.rutland@....com, linux@...linux.org.uk
Cc:     linux-renesas-soc@...r.kernel.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v5 02/10] pinctrl: generic: Add macros to unpack properties

Add PIN_CONF_UNPACK_PARAM and PIN_CONF_UNPACK_ARGS macros useful to
unpack generic properties and their arguments

Signed-off-by: Jacopo Mondi <jacopo+renesas@...ndi.org>
---
 include/linux/pinctrl/pinconf-generic.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/linux/pinctrl/pinconf-generic.h b/include/linux/pinctrl/pinconf-generic.h
index 279e3c5..2cd2a03 100644
--- a/include/linux/pinctrl/pinconf-generic.h
+++ b/include/linux/pinctrl/pinconf-generic.h
@@ -118,7 +118,9 @@ enum pin_config_param {
 /*
  * Helpful configuration macro to be used in tables etc.
  */
-#define PIN_CONF_PACKED(p, a) ((a << 8) | ((unsigned long) p & 0xffUL))
+#define PIN_CONF_PACKED(p, a) (((a) << 8) | ((unsigned long) (p) & 0xffUL))
+#define PIN_CONF_UNPACK_PARAM(c) ((c) & 0xffUL)
+#define PIN_CONF_UNPACK_ARGS(c) ((c) >> 8)
 
 /*
  * The following inlines stuffs a configuration parameter and data value
-- 
2.7.4