linux-kernel - Applied "regmap: irq: add ack_invert flag for chips using cleared bits as ack" to the regmap tree

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Message-Id: <E1Zcd75-0006Mz-9o@finisterre>
Date:	Thu, 17 Sep 2015 18:36:51 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Guo Zeng <Guo.Zeng@....com>, Barry Song <Baohua.Song@....com>,
	Mark Brown <broonie@...nel.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Applied "regmap: irq: add ack_invert flag for chips using cleared bits as ack" to the regmap tree

The patch

   regmap: irq: add ack_invert flag for chips using cleared bits as ack

has been applied to the regmap tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From a650fdd9427f1f5236f83d2d8137bea9b452fa53 Mon Sep 17 00:00:00 2001
From: Guo Zeng <Guo.Zeng@....com>
Date: Thu, 17 Sep 2015 05:23:21 +0000
Subject: [PATCH] regmap: irq: add ack_invert flag for chips using cleared bits
 as ack

An user will be CSR SiRFSoC ARM chips.

Signed-off-by: Guo Zeng <Guo.Zeng@....com>
Signed-off-by: Barry Song <Baohua.Song@....com>
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 drivers/base/regmap/regmap-irq.c | 12 ++++++++++--
 include/linux/regmap.h           |  2 ++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index e65eec2..8d16db5 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -133,7 +133,11 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
 		if (d->mask_buf[i] && (d->chip->ack_base || d->chip->use_ack)) {
 			reg = d->chip->ack_base +
 				(i * map->reg_stride * d->irq_reg_stride);
-			ret = regmap_write(map, reg, d->mask_buf[i]);
+			/* some chips ack by write 0 */
+			if (d->chip->ack_invert)
+				ret = regmap_write(map, reg, ~d->mask_buf[i]);
+			else
+				ret = regmap_write(map, reg, d->mask_buf[i]);
 			if (ret != 0)
 				dev_err(d->map->dev, "Failed to ack 0x%x: %d\n",
 					reg, ret);
@@ -470,7 +474,11 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
 		if (d->status_buf[i] && (chip->ack_base || chip->use_ack)) {
 			reg = chip->ack_base +
 				(i * map->reg_stride * d->irq_reg_stride);
-			ret = regmap_write(map, reg,
+			if (chip->ack_invert)
+				ret = regmap_write(map, reg,
+					~(d->status_buf[i] & d->mask_buf[i]));
+			else
+				ret = regmap_write(map, reg,
 					d->status_buf[i] & d->mask_buf[i]);
 			if (ret != 0) {
 				dev_err(map->dev, "Failed to ack 0x%x: %d\n",
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index f98fe9f..f36c9f9 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -809,6 +809,7 @@ struct regmap_irq {
  * @init_ack_masked: Ack all masked interrupts once during initalization.
  * @mask_invert: Inverted mask register: cleared bits are masked out.
  * @use_ack:     Use @ack register even if it is zero.
+ * @ack_invert:  Inverted ack register: cleared bits for ack.
  * @wake_invert: Inverted wake register: cleared bits are wake enabled.
  * @runtime_pm:  Hold a runtime PM lock on the device when accessing it.
  *
@@ -829,6 +830,7 @@ struct regmap_irq_chip {
 	bool init_ack_masked:1;
 	bool mask_invert:1;
 	bool use_ack:1;
+	bool ack_invert:1;
 	bool wake_invert:1;
 	bool runtime_pm:1;
 
-- 
2.5.0

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