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e7bfda2c24
This change makes the names of Broadcom targets consistent by using the common notation based on SoC/CPU ID (which is used internally anyway), bcmXXXX instead of brcmXXXX. This is even used for target TITLE in make menuconfig already, only the short target name used brcm so far. Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
227 lines
6.2 KiB
Diff
227 lines
6.2 KiB
Diff
From ab2f33e35e35905a76204138143875251f3e1088 Mon Sep 17 00:00:00 2001
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From: Jonas Gorski <jonas.gorski@gmail.com>
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Date: Fri, 24 Jun 2016 22:07:42 +0200
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Subject: [PATCH 01/13] pinctrl: add bcm63xx base code
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Setup directory and add a helper for bcm63xx pinctrl support.
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Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
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---
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drivers/pinctrl/Kconfig | 1 +
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drivers/pinctrl/Makefile | 1 +
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drivers/pinctrl/bcm63xx/Kconfig | 3 +
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drivers/pinctrl/bcm63xx/Makefile | 1 +
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drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.c | 142 ++++++++++++++++++++++++++++++
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drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.h | 14 +++
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7 files changed, 163 insertions(+)
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create mode 100644 drivers/pinctrl/bcm63xx/Kconfig
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create mode 100644 drivers/pinctrl/bcm63xx/Makefile
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create mode 100644 drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.c
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create mode 100644 drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.h
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--- a/drivers/pinctrl/Kconfig
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+++ b/drivers/pinctrl/Kconfig
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@@ -341,6 +341,7 @@ config PINCTRL_OCELOT
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source "drivers/pinctrl/actions/Kconfig"
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source "drivers/pinctrl/aspeed/Kconfig"
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source "drivers/pinctrl/bcm/Kconfig"
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+source "drivers/pinctrl/bcm63xx/Kconfig"
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source "drivers/pinctrl/berlin/Kconfig"
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source "drivers/pinctrl/freescale/Kconfig"
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source "drivers/pinctrl/intel/Kconfig"
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--- a/drivers/pinctrl/Makefile
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+++ b/drivers/pinctrl/Makefile
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@@ -46,6 +46,7 @@ obj-$(CONFIG_PINCTRL_OCELOT) += pinctrl-
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obj-y += actions/
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obj-$(CONFIG_ARCH_ASPEED) += aspeed/
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obj-y += bcm/
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+obj-y += bcm63xx/
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obj-$(CONFIG_PINCTRL_BERLIN) += berlin/
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obj-y += freescale/
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obj-$(CONFIG_X86) += intel/
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--- /dev/null
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+++ b/drivers/pinctrl/bcm63xx/Kconfig
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@@ -0,0 +1,3 @@
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+config PINCTRL_BCM63XX
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+ bool
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+ select GPIO_GENERIC
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--- /dev/null
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+++ b/drivers/pinctrl/bcm63xx/Makefile
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@@ -0,0 +1 @@
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+obj-$(CONFIG_PINCTRL_BCM63XX) += pinctrl-bcm63xx.o
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--- /dev/null
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+++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.c
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@@ -0,0 +1,155 @@
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+/*
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+ * This file is subject to the terms and conditions of the GNU General Public
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+ * License. See the file "COPYING" in the main directory of this archive
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+ * for more details.
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+ *
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+ * Copyright (C) 2016 Jonas Gorski <jonas.gorski@gmail.com>
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+ */
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+
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+#include <linux/bitops.h>
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+#include <linux/device.h>
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+#include <linux/gpio/driver.h>
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+#include <linux/of_irq.h>
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+
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+#include "pinctrl-bcm63xx.h"
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+#include "../core.h"
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+
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+#define BANK_SIZE sizeof(u32)
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+#define PINS_PER_BANK (BANK_SIZE * BITS_PER_BYTE)
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+
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+#ifdef CONFIG_OF
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+static int bcm63xx_gpio_of_xlate(struct gpio_chip *gc,
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+ const struct of_phandle_args *gpiospec,
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+ u32 *flags)
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+{
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+ struct gpio_chip *base = gpiochip_get_data(gc);
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+ int pin = gpiospec->args[0];
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+
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+ if (gc != &base[pin / PINS_PER_BANK])
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+ return -EINVAL;
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+
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+ pin = pin % PINS_PER_BANK;
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+
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+ if (pin >= gc->ngpio)
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+ return -EINVAL;
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+
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+ if (flags)
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+ *flags = gpiospec->args[1];
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+
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+ return pin;
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+}
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+#endif
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+
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+static int bcm63xx_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
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+{
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+ struct gpio_chip *base = gpiochip_get_data(chip);
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+ char irq_name[7]; /* "gpioXX" */
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+
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+ /* FIXME: this is ugly */
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+ sprintf(irq_name, "gpio%d", gpio + PINS_PER_BANK * (chip - base));
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+ return of_irq_get_byname(chip->of_node, irq_name);
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+}
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+
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+static int bcm63xx_setup_gpio(struct device *dev, struct gpio_chip *gc,
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+ void __iomem *dirout, void __iomem *data,
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+ size_t sz, int ngpio)
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+
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+{
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+ int banks, chips, i, ret = -EINVAL;
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+
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+ chips = DIV_ROUND_UP(ngpio, PINS_PER_BANK);
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+ banks = sz / BANK_SIZE;
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+
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+ for (i = 0; i < chips; i++) {
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+ int offset, pins;
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+ int reg_offset;
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+ char *label;
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+
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+ label = devm_kasprintf(dev, GFP_KERNEL, "bcm63xx-gpio.%i", i);
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+ if (!label)
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+ return -ENOMEM;
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+
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+ offset = i * PINS_PER_BANK;
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+ pins = min_t(int, ngpio - offset, PINS_PER_BANK);
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+
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+ /* the registers are treated like a huge big endian register */
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+ reg_offset = (banks - i - 1) * BANK_SIZE;
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+
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+ ret = bgpio_init(&gc[i], dev, BANK_SIZE, data + reg_offset,
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+ NULL, NULL, dirout + reg_offset, NULL,
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+ BGPIOF_BIG_ENDIAN_BYTE_ORDER);
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+ if (ret)
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+ return ret;
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+
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+ gc[i].request = gpiochip_generic_request;
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+ gc[i].free = gpiochip_generic_free;
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+
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+ if (of_get_property(dev->of_node, "interrupt-names", NULL))
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+ gc[i].to_irq = bcm63xx_gpio_to_irq;
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+
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+#ifdef CONFIG_OF
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+ gc[i].of_gpio_n_cells = 2;
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+ gc[i].of_xlate = bcm63xx_gpio_of_xlate;
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+#endif
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+
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+ gc[i].label = label;
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+ gc[i].ngpio = pins;
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+
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+ devm_gpiochip_add_data(dev, &gc[i], gc);
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+ }
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+
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+ return 0;
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+}
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+
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+static void bcm63xx_setup_pinranges(struct gpio_chip *gc, const char *name,
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+ int ngpio)
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+{
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+ int i, chips = DIV_ROUND_UP(ngpio, PINS_PER_BANK);
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+
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+ for (i = 0; i < chips; i++) {
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+ int offset, pins;
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+
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+ offset = i * PINS_PER_BANK;
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+ pins = min_t(int, ngpio - offset, PINS_PER_BANK);
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+
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+ gpiochip_add_pin_range(&gc[i], name, 0, offset, pins);
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+ }
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+}
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+
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+struct pinctrl_dev *bcm63xx_pinctrl_register(struct platform_device *pdev,
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+ struct pinctrl_desc *desc,
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+ void *priv, struct gpio_chip *gc,
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+ int ngpio)
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+{
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+ struct pinctrl_dev *pctldev;
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+ struct resource *res;
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+ void __iomem *dirout, *data;
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+ size_t sz;
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+ int ret;
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+
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+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dirout");
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+ dirout = devm_ioremap_resource(&pdev->dev, res);
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+ if (IS_ERR(dirout))
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+ return ERR_CAST(dirout);
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+
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+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
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+ data = devm_ioremap_resource(&pdev->dev, res);
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+ if (IS_ERR(data))
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+ return ERR_CAST(data);
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+
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+ sz = resource_size(res);
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+
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+ ret = bcm63xx_setup_gpio(&pdev->dev, gc, dirout, data, sz, ngpio);
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+ if (ret)
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+ return ERR_PTR(ret);
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+
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+ pctldev = devm_pinctrl_register(&pdev->dev, desc, priv);
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+ if (IS_ERR(pctldev))
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+ return pctldev;
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+
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+ bcm63xx_setup_pinranges(gc, pinctrl_dev_get_devname(pctldev), ngpio);
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+
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+ dev_info(&pdev->dev, "registered at mmio %p\n", dirout);
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+
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+ return pctldev;
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+}
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--- /dev/null
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+++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.h
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@@ -0,0 +1,14 @@
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+#ifndef __PINCTRL_BCM63XX
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+#define __PINCTRL_BCM63XX
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+
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+#include <linux/kernel.h>
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+#include <linux/gpio.h>
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+#include <linux/pinctrl/pinctrl.h>
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+#include <linux/platform_device.h>
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+
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+struct pinctrl_dev *bcm63xx_pinctrl_register(struct platform_device *pdev,
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+ struct pinctrl_desc *desc,
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+ void *priv, struct gpio_chip *gc,
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+ int ngpio);
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+
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+#endif
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