sunxi: Cleanup the reset code and add meaningful registers defines
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Olof Johansson <olof@lixom.net>
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@ -27,7 +27,10 @@
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#include "sunxi.h"
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#define WATCHDOG_CTRL_REG 0x00
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#define WATCHDOG_CTRL_RESTART (1 << 0)
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#define WATCHDOG_MODE_REG 0x04
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#define WATCHDOG_MODE_ENABLE (1 << 0)
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#define WATCHDOG_MODE_RESET_ENABLE (1 << 1)
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static void __iomem *wdt_base;
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@ -48,11 +51,19 @@ static void sunxi_restart(char mode, const char *cmd)
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return;
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/* Enable timer and set reset bit in the watchdog */
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writel(3, wdt_base + WATCHDOG_MODE_REG);
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writel(0xa57 << 1 | 1, wdt_base + WATCHDOG_CTRL_REG);
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while(1) {
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writel(WATCHDOG_MODE_ENABLE | WATCHDOG_MODE_RESET_ENABLE,
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wdt_base + WATCHDOG_MODE_REG);
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/*
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* Restart the watchdog. The default (and lowest) interval
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* value for the watchdog is 0.5s.
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*/
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writel(WATCHDOG_CTRL_RESTART, wdt_base + WATCHDOG_CTRL_REG);
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while (1) {
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mdelay(5);
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writel(3, wdt_base + WATCHDOG_MODE_REG);
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writel(WATCHDOG_MODE_ENABLE | WATCHDOG_MODE_RESET_ENABLE,
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wdt_base + WATCHDOG_MODE_REG);
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}
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}
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