[PATCH 7/8] mfd: pm8921: Implement irq_get_irqchip_state

Path	csiph.com!aioe.org!bofh.it!news.nic.it!robomod
From	Bjorn Andersson <bjorn.andersson@sonymobile.com>
Newsgroups	linux.kernel
Subject	[PATCH 7/8] mfd: pm8921: Implement irq_get_irqchip_state
Date	Thu, 18 Jun 2015 09:00:01 +0200
Message-ID	<pCBXP-Or-9@gated-at.bofh.it> (permalink)
References	<pCBXP-Or-11@gated-at.bofh.it>
X-Original-To	Kumar Gala <galak@codeaurora.org>, Andy Gross <agross@codeaurora.org>, Samuel Ortiz <sameo@linux.intel.com>, Lee Jones <lee.jones@linaro.org>, Linus Walleij <linus.walleij@linaro.org>
X-Mailer	git-send-email 1.8.2.2
MIME-Version	1.0
Content-Type	text/plain
Sender	robomod@news.nic.it
List-ID	<linux-kernel.vger.kernel.org>
X-Mailing-List	linux-kernel@vger.kernel.org
Approved	robomod@news.nic.it
Lines	79
Organization	linux.* mail to news gateway
X-Original-Cc	<marc.zyngier@arm.com>, <linux-arm-msm@vger.kernel.org>, <linux-soc@vger.kernel.org>, <linux-kernel@vger.kernel.org>
X-Original-Date	Wed, 17 Jun 2015 23:47:31 -0700
X-Original-Message-ID	<1434610052-602-8-git-send-email-bjorn.andersson@sonymobile.com>
X-Original-References	<1434610052-602-1-git-send-email-bjorn.andersson@sonymobile.com>
X-Original-Sender	linux-kernel-owner@vger.kernel.org
Xref	aioe.org linux.kernel:1167607

Show key headers only | View raw

Implement irq_chip->irq_get_irqchip_state to make it possible for PMIC
block drivers to access the IRQ real time status bits. The status bits
are used for various kinds of input signals, e.g. GPIO.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
---

This patch can be picked up independently of the rest of the series.

 drivers/mfd/pm8921-core.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/drivers/mfd/pm8921-core.c b/drivers/mfd/pm8921-core.c
index 5a92646a2ccb..5f81ba0c50f5 100644
--- a/drivers/mfd/pm8921-core.c
+++ b/drivers/mfd/pm8921-core.c
@@ -236,11 +236,54 @@ static int pm8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
 	return pm8xxx_config_irq(chip, block, config);
 }
 
+static int pm8xxx_irq_get_irqchip_state(struct irq_data *d,
+					enum irqchip_irq_state which,
+					bool *state)
+{
+	struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
+	unsigned int pmirq = irqd_to_hwirq(d);
+	unsigned int bits;
+	int irq_bit;
+	u8 block;
+	int rc;
+
+	if (!chip) {
+		pr_err("Failed to resolve pm_irq_chip\n");
+		return -EINVAL;
+	}
+
+	if (which != IRQCHIP_STATE_LINE_LEVEL)
+		return -EINVAL;
+
+	block = pmirq / 8;
+	irq_bit = pmirq % 8;
+
+	spin_lock(&chip->pm_irq_lock);
+	rc = regmap_write(chip->regmap, SSBI_REG_ADDR_IRQ_BLK_SEL, block);
+	if (rc) {
+		pr_err("Failed Selecting Block %d rc=%d\n", block, rc);
+		goto bail;
+	}
+
+	rc = regmap_read(chip->regmap, SSBI_REG_ADDR_IRQ_RT_STATUS, &bits);
+	if (rc) {
+		pr_err("Failed Reading Status rc=%d\n", rc);
+		goto bail;
+	}
+
+	*state = !!(bits & BIT(irq_bit));
+bail:
+	spin_unlock(&chip->pm_irq_lock);
+
+	return rc ? rc : 0;
+}
+
 static struct irq_chip pm8xxx_irq_chip = {
 	.name		= "pm8xxx",
 	.irq_mask_ack	= pm8xxx_irq_mask_ack,
 	.irq_unmask	= pm8xxx_irq_unmask,
 	.irq_set_type	= pm8xxx_irq_set_type,
+	.irq_get_irqchip_state = pm8xxx_irq_get_irqchip_state,
 	.flags		= IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_SKIP_SET_WAKE,
 };
 
-- 
1.8.2.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH 7/8] mfd: pm8921: Implement irq_get_irqchip_state Bjorn Andersson <bjorn.andersson@sonymobile.com> - 2015-06-18 09:00 +0200
  Re: [PATCH 7/8] mfd: pm8921: Implement irq_get_irqchip_state Marc Zyngier <marc.zyngier@arm.com> - 2015-06-18 09:40 +0200

csiph-web