1 files changed, 98 insertions, 0 deletions

diff --git a/drivers/bcma/driver_gpio.c b/drivers/bcma/driver_gpio.c
new file mode 100644
index 000000000000..9a6f585da2d9
--- /dev/null
+++ b/drivers/bcma/driver_gpio.c
@@ -0,0 +1,98 @@
+/*
+ * Broadcom specific AMBA
+ * GPIO driver
+ *
+ * Copyright 2011, Broadcom Corporation
+ * Copyright 2012, Hauke Mehrtens <hauke@hauke-m.de>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include <linux/gpio.h>
+#include <linux/export.h>
+#include <linux/bcma/bcma.h>
+
+#include "bcma_private.h"
+
+static inline struct bcma_drv_cc *bcma_gpio_get_cc(struct gpio_chip *chip)
+{
+        return container_of(chip, struct bcma_drv_cc, gpio);
+}
+
+static int bcma_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
+{
+        struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
+
+        return !!bcma_chipco_gpio_in(cc, 1 << gpio);
+}
+
+static void bcma_gpio_set_value(struct gpio_chip *chip, unsigned gpio,
+                                int value)
+{
+        struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
+
+        bcma_chipco_gpio_out(cc, 1 << gpio, value ? 1 << gpio : 0);
+}
+
+static int bcma_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+        struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
+
+        bcma_chipco_gpio_outen(cc, 1 << gpio, 0);
+        return 0;
+}
+
+static int bcma_gpio_direction_output(struct gpio_chip *chip, unsigned gpio,
+                                      int value)
+{
+        struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
+
+        bcma_chipco_gpio_outen(cc, 1 << gpio, 1 << gpio);
+        bcma_chipco_gpio_out(cc, 1 << gpio, value ? 1 << gpio : 0);
+        return 0;
+}
+
+static int bcma_gpio_request(struct gpio_chip *chip, unsigned gpio)
+{
+        struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
+
+        bcma_chipco_gpio_control(cc, 1 << gpio, 0);
+        /* clear pulldown */
+        bcma_chipco_gpio_pulldown(cc, 1 << gpio, 0);
+        /* Set pullup */
+        bcma_chipco_gpio_pullup(cc, 1 << gpio, 1 << gpio);
+
+        return 0;
+}
+
+static void bcma_gpio_free(struct gpio_chip *chip, unsigned gpio)
+{
+        struct bcma_drv_cc *cc = bcma_gpio_get_cc(chip);
+
+        /* clear pullup */
+        bcma_chipco_gpio_pullup(cc, 1 << gpio, 0);
+}
+
+int bcma_gpio_init(struct bcma_drv_cc *cc)
+{
+        struct gpio_chip *chip = &cc->gpio;
+
+        chip->label             = "bcma_gpio";
+        chip->owner             = THIS_MODULE;
+        chip->request           = bcma_gpio_request;
+        chip->free              = bcma_gpio_free;
+        chip->get               = bcma_gpio_get_value;
+        chip->set               = bcma_gpio_set_value;
+        chip->direction_input   = bcma_gpio_direction_input;
+        chip->direction_output  = bcma_gpio_direction_output;
+        chip->ngpio             = 16;
+        /* There is just one SoC in one device and its GPIO addresses should be
+         * deterministic to address them more easily. The other buses could get
+         * a random base number. */
+        if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)
+                chip->base              = 0;
+        else
+                chip->base              = -1;
+
+        return gpiochip_add(chip);
+}