Setup directory and add a helper for bcm63xx pinctrl support.
Signed-off-by: Jonas Gorski <jonas.gorski@xxxxxxxxx>
---
MAINTAINERS | 1 +
drivers/pinctrl/Kconfig | 1 +
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/bcm63xx/Kconfig | 3 +
drivers/pinctrl/bcm63xx/Makefile | 1 +
drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.c | 141 ++++++++++++++++++++++++++++++
drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.h | 14 +++
7 files changed, 162 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
diff --git a/MAINTAINERS b/MAINTAINERS
index 20bb1d0..33c3026 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2604,6 +2604,7 @@ F: arch/mips/boot/dts/brcm/bcm*.dts*
F: drivers/irqchip/irq-bcm63*
F: drivers/irqchip/irq-bcm7*
F: drivers/irqchip/irq-brcmstb*
+F: drivers/pinctrl/bcm63xx/*
F: include/linux/bcm963xx_nvram.h
F: include/linux/bcm963xx_tag.h
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index b3fe1d3..13a2b29 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -255,6 +255,7 @@ config PINCTRL_ZYNQ
This selects 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"
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 8ebd7b8..366e574 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.o
obj-$(CONFIG_PINCTRL_ZYNQ) += pinctrl-zynq.o
obj-y += bcm/
+obj-y += bcm63xx/
obj-$(CONFIG_PINCTRL_BERLIN) += berlin/
obj-y += freescale/
obj-$(CONFIG_X86) += intel/
diff --git a/drivers/pinctrl/bcm63xx/Kconfig b/drivers/pinctrl/bcm63xx/Kconfig
new file mode 100644
index 0000000..dd58f95
--- /dev/null
+++ b/drivers/pinctrl/bcm63xx/Kconfig
@@ -0,0 +1,3 @@
+config PINCTRL_BCM63XX
+ bool
+ select GPIO_GENERIC
diff --git a/drivers/pinctrl/bcm63xx/Makefile b/drivers/pinctrl/bcm63xx/Makefile
new file mode 100644
index 0000000..d16e74b
--- /dev/null
+++ b/drivers/pinctrl/bcm63xx/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_PINCTRL_BCM63XX) += pinctrl-bcm63xx.o
diff --git a/drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.c b/drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.c
new file mode 100644
index 0000000..e118171
--- /dev/null
+++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.c
@@ -0,0 +1,141 @@
+/*
+ * 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@xxxxxxxxx>
+ */
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/gpio/driver.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_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;
+
+#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;
+}
diff --git a/drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.h b/drivers/pinctrl/bcm63xx/pinctrl-bcm63xx.h
new file mode 100644
index 0000000..9bfe1d0
--- /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
--
2.1.4
--
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