linux-kernel - [PATCH RFC 14/15 v5] gpio-vt8500: Add block GPIO API

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Date:	Wed, 17 Oct 2012 14:31:46 +0200
From:	Roland Stigge <stigge@...com.de>
To:	gregkh@...uxfoundation.org, 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,
	rmallon@...il.com
Cc:	Roland Stigge <stigge@...com.de>
Subject: [PATCH RFC 14/15 v5] gpio-vt8500: Add block GPIO API

This patch adds block GPIO API support to the gpio-vt8500 driver.

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

---
 drivers/gpio/gpio-vt8500.c |   24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

--- linux-2.6.orig/drivers/gpio/gpio-vt8500.c
+++ linux-2.6/drivers/gpio/gpio-vt8500.c
@@ -209,6 +209,28 @@ static void vt8500_gpio_set_value(struct
 	writel_relaxed(val, vt8500_chip->base + vt8500_chip->regs->data_out);
 }
 
+static unsigned long vt8500_gpio_get_block(struct gpio_chip *chip,
+					   unsigned long mask)
+{
+	struct vt8500_gpio_chip *vt8500_chip = to_vt8500(chip);
+
+	return readl_relaxed(vt8500_chip->base + vt8500_chip->regs->data_in) &
+								mask;
+}
+
+static void vt8500_gpio_set_block(struct gpio_chip *chip, unsigned long mask,
+				  unsigned long  values)
+{
+	struct vt8500_gpio_chip *vt8500_chip = to_vt8500(chip);
+
+	u32 val = readl_relaxed(vt8500_chip->base +
+				vt8500_chip->regs->data_out);
+	val &= ~mask;
+	val |= values & mask;
+
+	writel_relaxed(val, vt8500_chip->base + vt8500_chip->regs->data_out);
+}
+
 static int vt8500_of_xlate(struct gpio_chip *gc,
 			    const struct of_phandle_args *gpiospec, u32 *flags)
 {
@@ -251,6 +273,8 @@ static int vt8500_add_chips(struct platf
 		chip->direction_output = vt8500_gpio_direction_output;
 		chip->get = vt8500_gpio_get_value;
 		chip->set = vt8500_gpio_set_value;
+		chip->get_block = vt8500_gpio_get_block;
+		chip->set_block = vt8500_gpio_set_block;
 		chip->can_sleep = 0;
 		chip->base = pin_cnt;
 		chip->ngpio = data->banks[i].ngpio;
--
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