+++ /dev/null
-From ab2f33e35e35905a76204138143875251f3e1088 Mon Sep 17 00:00:00 2001
-From: Jonas Gorski <jonas.gorski@gmail.com>
-Date: Fri, 24 Jun 2016 22:07:42 +0200
-Subject: [PATCH 01/13] pinctrl: add bcm63xx base code
-
-Setup directory and add a helper for bcm63xx pinctrl support.
-
-Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
----
- drivers/pinctrl/Kconfig | 1 +
- drivers/pinctrl/Makefile | 1 +
- drivers/pinctrl/bcm63xx/Kconfig | 3 +
- drivers/pinctrl/bcm63xx/Makefile | 1 +
- drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.c | 142 ++++++++++++++++++++++++++++++
- drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.h | 14 +++
- 7 files changed, 163 insertions(+)
- create mode 100644 drivers/pinctrl/bcm63xx/Kconfig
- create mode 100644 drivers/pinctrl/bcm63xx/Makefile
- create mode 100644 drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.c
- create mode 100644 drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.h
-
---- a/drivers/pinctrl/Kconfig
-+++ b/drivers/pinctrl/Kconfig
-@@ -248,6 +248,7 @@ config PINCTRL_ZYNQ
- This selectes the pinctrl driver for Xilinx Zynq.
-
- source "drivers/pinctrl/bcm/Kconfig"
-+source "drivers/pinctrl/bcm63xx/Kconfig"
- source "drivers/pinctrl/berlin/Kconfig"
- source "drivers/pinctrl/freescale/Kconfig"
- source "drivers/pinctrl/intel/Kconfig"
---- a/drivers/pinctrl/Makefile
-+++ b/drivers/pinctrl/Makefile
-@@ -41,6 +41,7 @@ obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.
- obj-$(CONFIG_PINCTRL_ZYNQ) += pinctrl-zynq.o
-
- obj-$(CONFIG_ARCH_BCM) += bcm/
-+obj-y += bcm63xx/
- obj-$(CONFIG_ARCH_BERLIN) += berlin/
- obj-y += freescale/
- obj-$(CONFIG_X86) += intel/
---- /dev/null
-+++ b/drivers/pinctrl/bcm63xx/Kconfig
-@@ -0,0 +1,3 @@
-+config PINCTRL_BCM63XX
-+ bool
-+ select GPIO_GENERIC
---- /dev/null
-+++ b/drivers/pinctrl/bcm63xx/Makefile
-@@ -0,0 +1 @@
-+obj-$(CONFIG_PINCTRL_BCM63XX) += pinctrl-bcm63xx.o
---- /dev/null
-+++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.c
-@@ -0,0 +1,155 @@
-+/*
-+ * 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.
-+ *
-+ * Copyright (C) 2016 Jonas Gorski <jonas.gorski@gmail.com>
-+ */
-+
-+#include <linux/bitops.h>
-+#include <linux/device.h>
-+#include <linux/gpio/driver.h>
-+#include <linux/of_irq.h>
-+
-+#include "pinctrl-bcm63xx.h"
-+#include "../core.h"
-+
-+#define BANK_SIZE sizeof(u32)
-+#define PINS_PER_BANK (BANK_SIZE * BITS_PER_BYTE)
-+
-+#ifdef CONFIG_OF
-+static int bcm63xx_gpio_of_xlate(struct gpio_chip *gc,
-+ const struct of_phandle_args *gpiospec,
-+ u32 *flags)
-+{
-+ struct gpio_chip *base = gpiochip_get_data(gc);
-+ int pin = gpiospec->args[0];
-+
-+ if (gc != &base[pin / PINS_PER_BANK])
-+ return -EINVAL;
-+
-+ pin = pin % PINS_PER_BANK;
-+
-+ if (pin >= gc->ngpio)
-+ return -EINVAL;
-+
-+ if (flags)
-+ *flags = gpiospec->args[1];
-+
-+ return pin;
-+}
-+#endif
-+
-+static int bcm63xx_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
-+{
-+ struct gpio_chip *base = gpiochip_get_data(chip);
-+ char irq_name[7]; /* "gpioXX" */
-+
-+ /* FIXME: this is ugly */
-+ sprintf(irq_name, "gpio%d", gpio + PINS_PER_BANK * (chip - base));
-+ return of_irq_get_byname(chip->of_node, irq_name);
-+}
-+
-+static int bcm63xx_setup_gpio(struct device *dev, struct gpio_chip *gc,
-+ void __iomem *dirout, void __iomem *data,
-+ size_t sz, int ngpio)
-+
-+{
-+ int banks, chips, i, ret = -EINVAL;
-+
-+ chips = DIV_ROUND_UP(ngpio, PINS_PER_BANK);
-+ banks = sz / BANK_SIZE;
-+
-+ for (i = 0; i < chips; i++) {
-+ int offset, pins;
-+ int reg_offset;
-+ char *label;
-+
-+ label = devm_kasprintf(dev, GFP_KERNEL, "bcm63xx-gpio.%i", i);
-+ if (!label)
-+ return -ENOMEM;
-+
-+ offset = i * PINS_PER_BANK;
-+ pins = min_t(int, ngpio - offset, PINS_PER_BANK);
-+
-+ /* the registers are treated like a huge big endian register */
-+ reg_offset = (banks - i - 1) * BANK_SIZE;
-+
-+ ret = bgpio_init(&gc[i], dev, BANK_SIZE, data + reg_offset,
-+ NULL, NULL, dirout + reg_offset, NULL,
-+ BGPIOF_BIG_ENDIAN_BYTE_ORDER);
-+ if (ret)
-+ return ret;
-+
-+ gc[i].request = gpiochip_generic_request;
-+ gc[i].free = gpiochip_generic_free;
-+
-+ if (of_get_property(dev->of_node, "interrupt-names", NULL))
-+ gc[i].to_irq = bcm63xx_gpio_to_irq;
-+
-+#ifdef CONFIG_OF
-+ gc[i].of_gpio_n_cells = 2;
-+ gc[i].of_xlate = bcm63xx_gpio_of_xlate;
-+#endif
-+
-+ gc[i].label = label;
-+ gc[i].ngpio = pins;
-+
-+ devm_gpiochip_add_data(dev, &gc[i], gc);
-+ }
-+
-+ return 0;
-+}
-+
-+static void bcm63xx_setup_pinranges(struct gpio_chip *gc, const char *name,
-+ int ngpio)
-+{
-+ int i, chips = DIV_ROUND_UP(ngpio, PINS_PER_BANK);
-+
-+ for (i = 0; i < chips; i++) {
-+ int offset, pins;
-+
-+ offset = i * PINS_PER_BANK;
-+ pins = min_t(int, ngpio - offset, PINS_PER_BANK);
-+
-+ gpiochip_add_pin_range(&gc[i], name, 0, offset, pins);
-+ }
-+}
-+
-+struct pinctrl_dev *bcm63xx_pinctrl_register(struct platform_device *pdev,
-+ struct pinctrl_desc *desc,
-+ void *priv, struct gpio_chip *gc,
-+ int ngpio)
-+{
-+ struct pinctrl_dev *pctldev;
-+ struct resource *res;
-+ void __iomem *dirout, *data;
-+ size_t sz;
-+ int ret;
-+
-+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dirout");
-+ dirout = devm_ioremap_resource(&pdev->dev, res);
-+ if (IS_ERR(dirout))
-+ return ERR_CAST(dirout);
-+
-+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
-+ data = devm_ioremap_resource(&pdev->dev, res);
-+ if (IS_ERR(data))
-+ return ERR_CAST(data);
-+
-+ sz = resource_size(res);
-+
-+ ret = bcm63xx_setup_gpio(&pdev->dev, gc, dirout, data, sz, ngpio);
-+ if (ret)
-+ return ERR_PTR(ret);
-+
-+ pctldev = devm_pinctrl_register(&pdev->dev, desc, priv);
-+ if (IS_ERR(pctldev))
-+ return pctldev;
-+
-+ bcm63xx_setup_pinranges(gc, pinctrl_dev_get_devname(pctldev), ngpio);
-+
-+ dev_info(&pdev->dev, "registered at mmio %p\n", dirout);
-+
-+ return pctldev;
-+}
---- /dev/null
-+++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.h
-@@ -0,0 +1,14 @@
-+#ifndef __PINCTRL_BCM63XX
-+#define __PINCTRL_BCM63XX
-+
-+#include <linux/kernel.h>
-+#include <linux/gpio.h>
-+#include <linux/pinctrl/pinctrl.h>
-+#include <linux/platform_device.h>
-+
-+struct pinctrl_dev *bcm63xx_pinctrl_register(struct platform_device *pdev,
-+ struct pinctrl_desc *desc,
-+ void *priv, struct gpio_chip *gc,
-+ int ngpio);
-+
-+#endif
projects / openwrt / staging / wigyori.git / blobdiff