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From:   Lina Iyer <ilina@codeaurora.org>
To:     swboyd@chromium.org, evgreen@chromium.org, maz@kernel.org,
        linus.walleij@linaro.org
Cc:     linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        bjorn.andersson@linaro.org, mkshah@codeaurora.org,
        linux-gpio@vger.kernel.org, Lina Iyer <ilina@codeaurora.org>
Subject: [PATCH RFC v2 01/14] irqdomain: add bus token DOMAIN_BUS_WAKEUP
Date:   Fri, 13 Sep 2019 15:59:09 -0600
Message-Id: <1568411962-1022-2-git-send-email-ilina@codeaurora.org>
In-Reply-To: <1568411962-1022-1-git-send-email-ilina@codeaurora.org>
References: <1568411962-1022-1-git-send-email-ilina@codeaurora.org>
Sender: linux-kernel-owner@vger.kernel.org
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A single controller can handle normal interrupts and wake-up interrupts
independently, with a different numbering space. It is thus crucial to
allow the driver for such a controller discriminate between the two.

A simple way to do so is to tag the wake-up irqdomain with a "bus token"
that indicates the wake-up domain. This slightly abuses the notion of
bus, but also radically simplifies the design of such a driver. Between
two evils, we choose the least damaging.

Suggested-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Lina Iyer <ilina@codeaurora.org>
---
 include/linux/irqdomain.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 07ec8b3..cc846ab 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -83,6 +83,7 @@ enum irq_domain_bus_token {
 	DOMAIN_BUS_IPI,
 	DOMAIN_BUS_FSL_MC_MSI,
 	DOMAIN_BUS_TI_SCI_INTA_MSI,
+	DOMAIN_BUS_WAKEUP,
 };
 
 /**
-- 
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