/branches/18.06.1/target/linux/brcm63xx/patches-4.14/130-pinctrl-add-bcm63xx-base-code.patch |
@@ -0,0 +1,226 @@ |
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 |
@@ -351,6 +351,7 @@ config PINCTRL_RK805 |
|
source "drivers/pinctrl/aspeed/Kconfig" |
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 |
@@ -48,6 +48,7 @@ obj-$(CONFIG_PINCTRL_RK805) += pinctrl-r |
|
obj-$(CONFIG_ARCH_ASPEED) += aspeed/ |
obj-y += bcm/ |
+obj-y += bcm63xx/ |
obj-$(CONFIG_PINCTRL_BERLIN) += berlin/ |
obj-y += freescale/ |
obj-$(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 |