sh-pfc: Move driver from drivers/sh/ to drivers/pinctrl/

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

1 files changed, 179 insertions, 0 deletions

diff --git a/drivers/pinctrl/sh-pfc/gpio.c b/drivers/pinctrl/sh-pfc/gpio.c
new file mode 100644
index 000000000000..a0454f321710
--- /dev/null
+++ b/drivers/pinctrl/sh-pfc/gpio.c
@@ -0,0 +1,179 @@
+/*
+ * SuperH Pin Function Controller GPIO driver.
+ *
+ * Copyright (C) 2008 Magnus Damm
+ * Copyright (C) 2009 - 2012 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME " gpio: " fmt
+
+#include <linux/device.h>
+#include <linux/gpio.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/sh_pfc.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#include "core.h"
+
+struct sh_pfc_chip {
+        struct sh_pfc           *pfc;
+        struct gpio_chip        gpio_chip;
+};
+
+static struct sh_pfc_chip *gpio_to_pfc_chip(struct gpio_chip *gc)
+{
+        return container_of(gc, struct sh_pfc_chip, gpio_chip);
+}
+
+static struct sh_pfc *gpio_to_pfc(struct gpio_chip *gc)
+{
+        return gpio_to_pfc_chip(gc)->pfc;
+}
+
+static int sh_gpio_request(struct gpio_chip *gc, unsigned offset)
+{
+        return pinctrl_request_gpio(offset);
+}
+
+static void sh_gpio_free(struct gpio_chip *gc, unsigned offset)
+{
+        pinctrl_free_gpio(offset);
+}
+
+static void sh_gpio_set_value(struct sh_pfc *pfc, unsigned gpio, int value)
+{
+        struct pinmux_data_reg *dr = NULL;
+        int bit = 0;
+
+        if (sh_pfc_get_data_reg(pfc, gpio, &dr, &bit) != 0)
+                BUG();
+        else
+                sh_pfc_write_bit(dr, bit, value);
+}
+
+static int sh_gpio_get_value(struct sh_pfc *pfc, unsigned gpio)
+{
+        struct pinmux_data_reg *dr = NULL;
+        int bit = 0;
+
+        if (sh_pfc_get_data_reg(pfc, gpio, &dr, &bit) != 0)
+                return -EINVAL;
+
+        return sh_pfc_read_bit(dr, bit);
+}
+
+static int sh_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
+{
+        return pinctrl_gpio_direction_input(offset);
+}
+
+static int sh_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
+                                    int value)
+{
+        sh_gpio_set_value(gpio_to_pfc(gc), offset, value);
+
+        return pinctrl_gpio_direction_output(offset);
+}
+
+static int sh_gpio_get(struct gpio_chip *gc, unsigned offset)
+{
+        return sh_gpio_get_value(gpio_to_pfc(gc), offset);
+}
+
+static void sh_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
+{
+        sh_gpio_set_value(gpio_to_pfc(gc), offset, value);
+}
+
+static int sh_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+        struct sh_pfc *pfc = gpio_to_pfc(gc);
+        pinmux_enum_t enum_id;
+        pinmux_enum_t *enum_ids;
+        int i, k, pos;
+
+        pos = 0;
+        enum_id = 0;
+        while (1) {
+                pos = sh_pfc_gpio_to_enum(pfc, offset, pos, &enum_id);
+                if (pos <= 0 || !enum_id)
+                        break;
+
+                for (i = 0; i < pfc->pdata->gpio_irq_size; i++) {
+                        enum_ids = pfc->pdata->gpio_irq[i].enum_ids;
+                        for (k = 0; enum_ids[k]; k++) {
+                                if (enum_ids[k] == enum_id)
+                                        return pfc->pdata->gpio_irq[i].irq;
+                        }
+                }
+        }
+
+        return -ENOSYS;
+}
+
+static void sh_pfc_gpio_setup(struct sh_pfc_chip *chip)
+{
+        struct sh_pfc *pfc = chip->pfc;
+        struct gpio_chip *gc = &chip->gpio_chip;
+
+        gc->request = sh_gpio_request;
+        gc->free = sh_gpio_free;
+        gc->direction_input = sh_gpio_direction_input;
+        gc->get = sh_gpio_get;
+        gc->direction_output = sh_gpio_direction_output;
+        gc->set = sh_gpio_set;
+        gc->to_irq = sh_gpio_to_irq;
+
+        WARN_ON(pfc->pdata->first_gpio != 0); /* needs testing */
+
+        gc->label = pfc->pdata->name;
+        gc->owner = THIS_MODULE;
+        gc->base = pfc->pdata->first_gpio;
+        gc->ngpio = (pfc->pdata->last_gpio - pfc->pdata->first_gpio) + 1;
+}
+
+int sh_pfc_register_gpiochip(struct sh_pfc *pfc)
+{
+        struct sh_pfc_chip *chip;
+        int ret;
+
+        chip = devm_kzalloc(pfc->dev, sizeof(*chip), GFP_KERNEL);
+        if (unlikely(!chip))
+                return -ENOMEM;
+
+        chip->pfc = pfc;
+
+        sh_pfc_gpio_setup(chip);
+
+        ret = gpiochip_add(&chip->gpio_chip);
+        if (unlikely(ret < 0))
+                return ret;
+
+        pfc->gpio = chip;
+
+        pr_info("%s handling gpio %d -> %d\n",
+                pfc->pdata->name, pfc->pdata->first_gpio,
+                pfc->pdata->last_gpio);
+
+        return 0;
+}
+
+int sh_pfc_unregister_gpiochip(struct sh_pfc *pfc)
+{
+        struct sh_pfc_chip *chip = pfc->gpio;
+        int ret;
+
+        ret = gpiochip_remove(&chip->gpio_chip);
+        if (unlikely(ret < 0))
+                return ret;
+
+        pfc->gpio = NULL;
+        return 0;
+}