linux-kernel - [PATCH 5/6 v3] mfd: tps65910-irq: Add devicetree init support

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Date:	Tue, 8 May 2012 11:42:42 -0700
From:	Rhyland Klein <rklein@...dia.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Liam Girdwood <lrg@...com>
CC:	<linux-kernel@...r.kernel.org>,
	<devicetree-discuss@...ts.ozlabs.org>,
	Rhyland Klein <rklein@...dia.com>
Subject: [PATCH 5/6 v3] mfd: tps65910-irq: Add devicetree init support

Add support for initializing when boot using devicetree. The main difference
is that the irq_base will not be setup, so it needs to be manually handled.

Signed-off-by: Rhyland Klein <rklein@...dia.com>
---
 v3: no change from v2.
 v2: split off irq specific changes based on previous review comments.

 drivers/mfd/tps65910-irq.c |   21 +++++++++++++++------
 1 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/mfd/tps65910-irq.c b/drivers/mfd/tps65910-irq.c
index 0f1ff7f..066a30f 100644
--- a/drivers/mfd/tps65910-irq.c
+++ b/drivers/mfd/tps65910-irq.c
@@ -180,12 +180,6 @@ int tps65910_irq_init(struct tps65910 *tps65910, int irq,
 		return -EINVAL;
 	}
 
-	tps65910->irq_mask = 0xFFFFFF;
-
-	mutex_init(&tps65910->irq_lock);
-	tps65910->chip_irq = irq;
-	tps65910->irq_base = pdata->irq_base;
-
 	switch (tps65910_chip_id(tps65910)) {
 	case TPS65910:
 		tps65910->irq_num = TPS65910_NUM_IRQ;
@@ -195,6 +189,21 @@ int tps65910_irq_init(struct tps65910 *tps65910, int irq,
 		break;
 	}
 
+	if (pdata->irq_base <= 0)
+		pdata->irq_base = irq_alloc_descs(-1, 0, tps65910->irq_num, -1);
+
+	if (pdata->irq_base <= 0) {
+		dev_err(tps65910->dev, "Failed to allocate irq descs: %d\n",
+			pdata->irq_base);
+		return pdata->irq_base;
+	}
+
+	tps65910->irq_mask = 0xFFFFFF;
+
+	mutex_init(&tps65910->irq_lock);
+	tps65910->chip_irq = irq;
+	tps65910->irq_base = pdata->irq_base;
+
 	/* Register with genirq */
 	for (cur_irq = tps65910->irq_base;
 	     cur_irq < tps65910->irq_num + tps65910->irq_base;
-- 
1.7.0.4

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