linux-kernel - [PATCH v6 1/6] regmap: add a new macro:REGMAP_IRQ_REG_LINE(_id, _reg

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Date:   Tue, 30 Oct 2018 18:07:56 +0800
From:   Tony Xie <tony.xie@...k-chips.com>
To:     heiko@...ech.de
Cc:     broonie@...nel.org, lee.jones@...aro.org, robh+dt@...nel.org,
        mark.rutland@....com, a.zummo@...ertech.it,
        alexandre.belloni@...tlin.com, sboyd@...nel.org,
        linux-clk@...r.kernel.org, linux-rtc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, chenjh@...k-chips.com,
        xsf@...k-chips.com, zhangqing@...k-chips.com,
        huangtao@...k-chips.com, tony.xie@...k-chips.com
Subject: [PATCH v6 1/6] regmap: add a new macro:REGMAP_IRQ_REG_LINE(_id, _reg_bits)

if there are lots of irqs for a device and the register addresses for these
irqs is continuous, we can use this macro to initialize regmap_irq value.

Signed-off-by: Tony Xie <tony.xie@...k-chips.com>
---
 include/linux/regmap.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 4f38068..a468b81 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -1047,6 +1047,12 @@ struct regmap_irq {
 #define REGMAP_IRQ_REG(_irq, _off, _mask)		\
 	[_irq] = { .reg_offset = (_off), .mask = (_mask) }
 
+#define REGMAP_IRQ_REG_LINE(_id, _reg_bits) \
+	[_id] = {				\
+		.mask = BIT((_id) % (_reg_bits)),	\
+		.reg_offset = (_id) / (_reg_bits),	\
+	}
+
 /**
  * struct regmap_irq_chip - Description of a generic regmap irq_chip.
  *
-- 
1.9.1