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watchdog: imx7ulp: Use definitions instead of magic values

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Use definitions instead of magic values in order to improve readability.

Since the CLK field of the WDOG CS register is composed of two bits
to select the watchdog clock source, use a shift representation
instead of BIT().

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20191029174037.25381-5-festevam@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Fabio Estevam 2019-10-29 14:40:37 -03:00 committed by Wim Van Sebroeck
parent c37e358163
commit eccb7fe5e7
1 changed files with 4 additions and 1 deletions
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5
drivers/watchdog/imx7ulp_wdt.c
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@ -17,6 +17,9 @@
#define WDOG_CS_CMD32EN BIT(13)
#define WDOG_CS_ULK BIT(11)
#define WDOG_CS_RCS BIT(10)
#define LPO_CLK 0x1
#define LPO_CLK_SHIFT 8
#define WDOG_CS_CLK (LPO_CLK << LPO_CLK_SHIFT)
#define WDOG_CS_EN BIT(7)
#define WDOG_CS_UPDATE BIT(5)
@ -129,7 +132,7 @@ static void imx7ulp_wdt_init(void __iomem *base, unsigned int timeout)
/* set an initial timeout value in TOVAL */
writel(timeout, base + WDOG_TOVAL);
/* enable 32bit command sequence and reconfigure */
val = BIT(13) | BIT(8) | BIT(5);
val = WDOG_CS_CMD32EN | WDOG_CS_CLK | WDOG_CS_UPDATE;
writel(val, base + WDOG_CS);
}