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watchdog: sunxi: Add A31 watchdog support

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This patch adds support for the watchdog hardware found in A31 and
newer SoCs. This new hardware has registers at different offsets, and
the system reset control has been split out of the "mode" register
into a new "configuration" register.

Differences not supported by this driver include separate interrupt
lines for each watchdog, instead of sharing an interrupt line and
registers with the timer block.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Chen-Yu Tsai 2014-09-22 00:05:19 +08:00 committed by Wim Van Sebroeck
parent f2147de334
commit c5ec618fbf
1 changed files with 10 additions and 0 deletions
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10
drivers/watchdog/sunxi_wdt.c
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@ -219,8 +219,18 @@ static const struct sunxi_wdt_reg sun4i_wdt_reg = {
.wdt_reset_val = 0x02,
};
static const struct sunxi_wdt_reg sun6i_wdt_reg = {
.wdt_ctrl = 0x10,
.wdt_cfg = 0x14,
.wdt_mode = 0x18,
.wdt_timeout_shift = 4,
.wdt_reset_mask = 0x03,
.wdt_reset_val = 0x01,
};
static const struct of_device_id sunxi_wdt_dt_ids[] = {
{ .compatible = "allwinner,sun4i-a10-wdt", .data = &sun4i_wdt_reg },
{ .compatible = "allwinner,sun6i-a31-wdt", .data = &sun6i_wdt_reg },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, sunxi_wdt_dt_ids);