linux-kernel - [PATCH RFC 08/11 v4] gpio-em: Add block GPIO API

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Message-Id: <1350343887-7344-9-git-send-email-stigge@antcom.de>
Date:	Tue, 16 Oct 2012 01:31:24 +0200
From:	Roland Stigge <stigge@...com.de>
To:	grant.likely@...retlab.ca, linus.walleij@...aro.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	w.sang@...gutronix.de, jbe@...gutronix.de, plagnioj@...osoft.com,
	highguy@...il.com, broonie@...nsource.wolfsonmicro.com,
	daniel-gl@....net, gregkh@...uxfoundation.org, rmallon@...il.com
Cc:	Roland Stigge <stigge@...com.de>
Subject: [PATCH RFC 08/11 v4] gpio-em: Add block GPIO API

This patch adds block GPIO API support to the gpio-em driver.

Signed-off-by: Roland Stigge <stigge@...com.de>

---
 drivers/gpio/gpio-em.c |   23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

--- linux-2.6.orig/drivers/gpio/gpio-em.c
+++ linux-2.6/drivers/gpio/gpio-em.c
@@ -203,6 +203,27 @@ static void em_gio_set(struct gpio_chip
 		__em_gio_set(chip, GIO_OH, offset - 16, value);
 }
 
+static unsigned long em_gio_get_block(struct gpio_chip *chip,
+				      unsigned long mask)
+{
+	return (int)(em_gio_read(gpio_to_priv(chip), GIO_I) & mask);
+}
+
+static void em_gio_set_block(struct gpio_chip *chip, unsigned long mask,
+			     unsigned long values)
+{
+	unsigned long mask_ol = mask & 0xFFFF;
+	unsigned long mask_oh = mask >> 16;
+
+	unsigned long values_ol = values & mask_ol;
+	unsigned long values_oh = (values >> 16) & mask_oh;
+
+	em_gio_write(gpio_to_priv(chip), GIO_OL,
+		     mask_ol << 16 | values_ol);
+	em_gio_write(gpio_to_priv(chip), GIO_OH,
+		     mask_oh << 16 | values_oh);
+}
+
 static int em_gio_direction_output(struct gpio_chip *chip, unsigned offset,
 				   int value)
 {
@@ -317,8 +338,10 @@ static int __devinit em_gio_probe(struct
 	gpio_chip = &p->gpio_chip;
 	gpio_chip->direction_input = em_gio_direction_input;
 	gpio_chip->get = em_gio_get;
+	gpio_chip->get_block = em_gio_get_block;
 	gpio_chip->direction_output = em_gio_direction_output;
 	gpio_chip->set = em_gio_set;
+	gpio_chip->set_block = em_gio_set_block;
 	gpio_chip->to_irq = em_gio_to_irq;
 	gpio_chip->label = name;
 	gpio_chip->owner = THIS_MODULE;
--
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