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Commit c5ec618f authored by Chen-Yu Tsai's avatar Chen-Yu Tsai Committed by Wim Van Sebroeck
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watchdog: sunxi: Add A31 watchdog support 



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: default avatarChen-Yu Tsai <wens@csie.org>
Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent f2147de3

drivers/watchdog/sunxi_wdt.c

+10 −0
Original line number Diff line number Diff line
@@ -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);