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Message-Id: <1371485086-16016-3-git-send-email-christian.ruppert@abilis.com>
Date: Mon, 17 Jun 2013 18:04:45 +0200
From: Christian Ruppert <christian.ruppert@...lis.com>
To: Stephen Warren <swarren@...dotorg.org>,
Linus Walleij <linus.walleij@...aro.org>
Cc: Patrice CHOTARD <patrice.chotard@...com>,
linux-kernel@...r.kernel.org,
Grant Likely <grant.likely@...retlab.ca>,
Rob Herring <rob.herring@...xeda.com>,
Rob Landley <rob@...dley.net>,
Sascha Leuenberger <sascha.leuenberger@...lis.com>,
Pierrick Hascoet <pierrick.hascoet@...lis.com>,
devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org,
Alexandre Courbot <acourbot@...dia.com>,
Christian Ruppert <christian.ruppert@...lis.com>
Subject: [PATCH 3/4] GPIO: Add TB10x GPIO driver
The GPIO driver for the Abilis Systems TB10x series of SOCs based on ARC700
CPUs. It supports GPIO control and GPIO interrupt generation.
Signed-off-by: Sascha Leuenberger <sascha.leuenberger@...lis.com>
Signed-off-by: Christian Ruppert <christian.ruppert@...lis.com>
---
.../devicetree/bindings/gpio/abilis,tb10x-gpio.txt | 36 ++
arch/arc/boot/dts/abilis_tb100.dtsi | 42 ++-
arch/arc/boot/dts/abilis_tb100_dvk.dts | 24 +-
arch/arc/boot/dts/abilis_tb101.dtsi | 42 ++-
arch/arc/boot/dts/abilis_tb101_dvk.dts | 24 +-
drivers/gpio/Kconfig | 4 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-tb10x.c | 341 ++++++++++++++++++++
8 files changed, 462 insertions(+), 52 deletions(-)
create mode 100644 Documentation/devicetree/bindings/gpio/abilis,tb10x-gpio.txt
create mode 100644 drivers/gpio/gpio-tb10x.c
diff --git a/Documentation/devicetree/bindings/gpio/abilis,tb10x-gpio.txt b/Documentation/devicetree/bindings/gpio/abilis,tb10x-gpio.txt
new file mode 100644
index 0000000..26a3c68
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/abilis,tb10x-gpio.txt
@@ -0,0 +1,36 @@
+* Abilis TB10x GPIO controller
+
+Required Properties:
+- compatible: Should be "abilis,tb10x-gpio"
+- reg: Address and length of the register set for the device
+- gpio-controller: Marks the device node as a gpio controller.
+- #gpio-cells: Should be <2>. The first cell is the pin number and the
+ second cell is used to specify optional parameters:
+ - bit 0 specifies polarity (0 for normal, 1 for inverted).
+- ngpio: the number of GPIO pins this driver controls.
+
+Optional Properties:
+- interrupt-controller: Marks the device node as an interrupt controller.
+- #interrupt-cells: Should be <1>. Interrupts are triggered on both edges.
+- interrupts: Defines the interrupt line connecting this GPIO controller to
+ its parent interrupt controller.
+- interrupt-parent: Defines the parent interrupt controller.
+
+GPIO ranges are specified as described in
+Documentation/devicetree/bindings/gpio/gpio.txt
+
+Example:
+
+ gpioa: gpio@...40000 {
+ compatible = "abilis,tb10x-gpio";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ interrupt-parent = <&tb10x_ictl>;
+ interrupts = <27 2>;
+ reg = <0xFF140000 0x1000>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ ngpio = <3>;
+ gpio-ranges = <&iomux 0 0 0>;
+ gpio-ranges-group-names = "gpioa_pins";
+ };
diff --git a/arch/arc/boot/dts/abilis_tb100.dtsi b/arch/arc/boot/dts/abilis_tb100.dtsi
index 1a42cf1..f1fa416 100644
--- a/arch/arc/boot/dts/abilis_tb100.dtsi
+++ b/arch/arc/boot/dts/abilis_tb100.dtsi
@@ -176,7 +176,8 @@
interrupts = <27 1>;
reg = <0xFF140000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <3>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpioa_pins";
};
@@ -188,7 +189,8 @@
interrupts = <27 1>;
reg = <0xFF141000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <2>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpiob_pins";
};
@@ -200,7 +202,8 @@
interrupts = <27 1>;
reg = <0xFF142000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <3>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpioc_pins";
};
@@ -212,7 +215,8 @@
interrupts = <27 1>;
reg = <0xFF143000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <2>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpiod_pins";
};
@@ -224,7 +228,8 @@
interrupts = <27 1>;
reg = <0xFF144000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <3>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpioe_pins";
};
@@ -236,7 +241,8 @@
interrupts = <27 1>;
reg = <0xFF145000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <2>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpiof_pins";
};
@@ -248,7 +254,8 @@
interrupts = <27 1>;
reg = <0xFF146000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <3>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpiog_pins";
};
@@ -260,7 +267,8 @@
interrupts = <27 1>;
reg = <0xFF147000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <2>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpioh_pins";
};
@@ -272,7 +280,8 @@
interrupts = <27 1>;
reg = <0xFF148000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <12>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpioi_pins";
};
@@ -284,7 +293,8 @@
interrupts = <27 1>;
reg = <0xFF149000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <32>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpioj_pins";
};
@@ -296,7 +306,8 @@
interrupts = <27 1>;
reg = <0xFF14A000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <22>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpiok_pins";
};
@@ -308,7 +319,8 @@
interrupts = <27 1>;
reg = <0xFF14B000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <4>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpiol_pins";
};
@@ -320,7 +332,8 @@
interrupts = <27 1>;
reg = <0xFF14C000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <4>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpiom_pins";
};
@@ -332,7 +345,8 @@
interrupts = <27 1>;
reg = <0xFF14D000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <5>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpion_pins";
};
diff --git a/arch/arc/boot/dts/abilis_tb100_dvk.dts b/arch/arc/boot/dts/abilis_tb100_dvk.dts
index 0fa0d4a..d6af955 100644
--- a/arch/arc/boot/dts/abilis_tb100_dvk.dts
+++ b/arch/arc/boot/dts/abilis_tb100_dvk.dts
@@ -64,62 +64,62 @@
compatible = "gpio-leds";
power {
label = "Power";
- gpios = <&gpioi 0>;
+ gpios = <&gpioi 0 0>;
linux,default-trigger = "default-on";
};
heartbeat {
label = "Heartbeat";
- gpios = <&gpioi 1>;
+ gpios = <&gpioi 1 0>;
linux,default-trigger = "heartbeat";
};
led2 {
label = "LED2";
- gpios = <&gpioi 2>;
+ gpios = <&gpioi 2 0>;
default-state = "off";
};
led3 {
label = "LED3";
- gpios = <&gpioi 3>;
+ gpios = <&gpioi 3 0>;
default-state = "off";
};
led4 {
label = "LED4";
- gpios = <&gpioi 4>;
+ gpios = <&gpioi 4 0>;
default-state = "off";
};
led5 {
label = "LED5";
- gpios = <&gpioi 5>;
+ gpios = <&gpioi 5 0>;
default-state = "off";
};
led6 {
label = "LED6";
- gpios = <&gpioi 6>;
+ gpios = <&gpioi 6 0>;
default-state = "off";
};
led7 {
label = "LED7";
- gpios = <&gpioi 7>;
+ gpios = <&gpioi 7 0>;
default-state = "off";
};
led8 {
label = "LED8";
- gpios = <&gpioi 8>;
+ gpios = <&gpioi 8 0>;
default-state = "off";
};
led9 {
label = "LED9";
- gpios = <&gpioi 9>;
+ gpios = <&gpioi 9 0>;
default-state = "off";
};
led10 {
label = "LED10";
- gpios = <&gpioi 10>;
+ gpios = <&gpioi 10 0>;
default-state = "off";
};
led11 {
label = "LED11";
- gpios = <&gpioi 11>;
+ gpios = <&gpioi 11 0>;
default-state = "off";
};
};
diff --git a/arch/arc/boot/dts/abilis_tb101.dtsi b/arch/arc/boot/dts/abilis_tb101.dtsi
index 08986cd..311116f 100644
--- a/arch/arc/boot/dts/abilis_tb101.dtsi
+++ b/arch/arc/boot/dts/abilis_tb101.dtsi
@@ -185,7 +185,8 @@
interrupts = <27 1>;
reg = <0xFF140000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <3>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpioa_pins";
};
@@ -197,7 +198,8 @@
interrupts = <27 1>;
reg = <0xFF141000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <2>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpiob_pins";
};
@@ -209,7 +211,8 @@
interrupts = <27 1>;
reg = <0xFF142000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <3>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpioc_pins";
};
@@ -221,7 +224,8 @@
interrupts = <27 1>;
reg = <0xFF143000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <2>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpiod_pins";
};
@@ -233,7 +237,8 @@
interrupts = <27 1>;
reg = <0xFF144000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <3>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpioe_pins";
};
@@ -245,7 +250,8 @@
interrupts = <27 1>;
reg = <0xFF145000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <2>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpiof_pins";
};
@@ -257,7 +263,8 @@
interrupts = <27 1>;
reg = <0xFF146000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <3>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpiog_pins";
};
@@ -269,7 +276,8 @@
interrupts = <27 1>;
reg = <0xFF147000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <2>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpioh_pins";
};
@@ -281,7 +289,8 @@
interrupts = <27 1>;
reg = <0xFF148000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <12>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpioi_pins";
};
@@ -293,7 +302,8 @@
interrupts = <27 1>;
reg = <0xFF149000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <32>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpioj_pins";
};
@@ -305,7 +315,8 @@
interrupts = <27 1>;
reg = <0xFF14A000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <22>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpiok_pins";
};
@@ -317,7 +328,8 @@
interrupts = <27 1>;
reg = <0xFF14B000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <4>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpiol_pins";
};
@@ -329,7 +341,8 @@
interrupts = <27 1>;
reg = <0xFF14C000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <4>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpiom_pins";
};
@@ -341,7 +354,8 @@
interrupts = <27 1>;
reg = <0xFF14D000 0x1000>;
gpio-controller;
- #gpio-cells = <1>;
+ #gpio-cells = <2>;
+ ngpio = <5>;
gpio-ranges = <&iomux 0 0 0>;
gpio-ranges-group-names = "gpion_pins";
};
diff --git a/arch/arc/boot/dts/abilis_tb101_dvk.dts b/arch/arc/boot/dts/abilis_tb101_dvk.dts
index a4d80ce..811a73b 100644
--- a/arch/arc/boot/dts/abilis_tb101_dvk.dts
+++ b/arch/arc/boot/dts/abilis_tb101_dvk.dts
@@ -64,62 +64,62 @@
compatible = "gpio-leds";
power {
label = "Power";
- gpios = <&gpioi 0>;
+ gpios = <&gpioi 0 0>;
linux,default-trigger = "default-on";
};
heartbeat {
label = "Heartbeat";
- gpios = <&gpioi 1>;
+ gpios = <&gpioi 1 0>;
linux,default-trigger = "heartbeat";
};
led2 {
label = "LED2";
- gpios = <&gpioi 2>;
+ gpios = <&gpioi 2 0>;
default-state = "off";
};
led3 {
label = "LED3";
- gpios = <&gpioi 3>;
+ gpios = <&gpioi 3 0>;
default-state = "off";
};
led4 {
label = "LED4";
- gpios = <&gpioi 4>;
+ gpios = <&gpioi 4 0>;
default-state = "off";
};
led5 {
label = "LED5";
- gpios = <&gpioi 5>;
+ gpios = <&gpioi 5 0>;
default-state = "off";
};
led6 {
label = "LED6";
- gpios = <&gpioi 6>;
+ gpios = <&gpioi 6 0>;
default-state = "off";
};
led7 {
label = "LED7";
- gpios = <&gpioi 7>;
+ gpios = <&gpioi 7 0>;
default-state = "off";
};
led8 {
label = "LED8";
- gpios = <&gpioi 8>;
+ gpios = <&gpioi 8 0>;
default-state = "off";
};
led9 {
label = "LED9";
- gpios = <&gpioi 9>;
+ gpios = <&gpioi 9 0>;
default-state = "off";
};
led10 {
label = "LED10";
- gpios = <&gpioi 10>;
+ gpios = <&gpioi 10 0>;
default-state = "off";
};
led11 {
label = "LED11";
- gpios = <&gpioi 11>;
+ gpios = <&gpioi 11 0>;
default-state = "off";
};
};
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 573c449..1faeb7c 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -317,6 +317,10 @@ config GPIO_GRGPIO
Select this to support Aeroflex Gaisler GRGPIO cores from the GRLIB
VHDL IP core library.
+config GPIO_TB10X
+ bool
+ select OF_GPIO
+
comment "I2C GPIO expanders:"
config GPIO_ARIZONA
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 0cb2d65..7bc567f 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -68,6 +68,7 @@ obj-$(CONFIG_GPIO_STA2X11) += gpio-sta2x11.o
obj-$(CONFIG_GPIO_STMPE) += gpio-stmpe.o
obj-$(CONFIG_GPIO_STP_XWAY) += gpio-stp-xway.o
obj-$(CONFIG_GPIO_SX150X) += gpio-sx150x.o
+obj-$(CONFIG_GPIO_TB10X) += gpio-tb10x.o
obj-$(CONFIG_GPIO_TC3589X) += gpio-tc3589x.o
obj-$(CONFIG_ARCH_TEGRA) += gpio-tegra.o
obj-$(CONFIG_GPIO_TIMBERDALE) += gpio-timberdale.o
diff --git a/drivers/gpio/gpio-tb10x.c b/drivers/gpio/gpio-tb10x.c
new file mode 100644
index 0000000..7f67a4c
--- /dev/null
+++ b/drivers/gpio/gpio-tb10x.c
@@ -0,0 +1,341 @@
+/* Abilis Systems MODULE DESCRIPTION
+ *
+ * Copyright (C) Abilis Systems 2013
+ *
+ * Authors: Sascha Leuenberger <sascha.leuenberger@...lis.com>
+ * Christian Ruppert <christian.ruppert@...lis.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
+#include <linux/spinlock.h>
+#include <linux/bitops.h>
+#include <linux/pinctrl/consumer.h>
+
+#define TB10X_GPIO_DIR_IN (0x00000000)
+#define TB10X_GPIO_DIR_OUT (0x00000001)
+#define OFFSET_TO_REG_DDR (0x00)
+#define OFFSET_TO_REG_DATA (0x04)
+#define OFFSET_TO_REG_INT_EN (0x08)
+#define OFFSET_TO_REG_CHANGE (0x0C)
+#define OFFSET_TO_REG_WRMASK (0x10)
+#define OFFSET_TO_REG_INT_TYPE (0x14)
+
+
+/**
+ * @spinlock: used for atomic read/modify/write of registers
+ * @base: register base address
+ * @domain: IRQ domain of GPIO generated interrupts managed by this controller
+ * @irq: Interrupt line of parent interrupt controller
+ * @gc: gpio_chip structure associated to this GPIO controller
+ */
+struct tb10x_gpio {
+ spinlock_t spinlock;
+ void __iomem *base;
+ struct irq_domain *domain;
+ int irq;
+ struct gpio_chip gc;
+};
+
+static inline u32 tb10x_reg_read(struct tb10x_gpio *gpio, unsigned int offs)
+{
+ return ioread32(gpio->base + offs);
+}
+
+static inline void tb10x_reg_write(struct tb10x_gpio *gpio, unsigned int offs,
+ u32 val)
+{
+ iowrite32(val, gpio->base + offs);
+}
+
+static inline void tb10x_set_bits(struct tb10x_gpio *gpio, unsigned int offs,
+ u32 mask, u32 val)
+{
+ u32 r;
+ unsigned long flags;
+
+ spin_lock_irqsave(&gpio->spinlock, flags);
+
+ r = tb10x_reg_read(gpio, offs);
+ r = (r & ~mask) | (val & mask);
+
+ tb10x_reg_write(gpio, offs, r);
+
+ spin_unlock_irqrestore(&gpio->spinlock, flags);
+}
+
+static inline struct tb10x_gpio *to_tb10x_gpio(struct gpio_chip *chip)
+{
+ return container_of(chip, struct tb10x_gpio, gc);
+}
+
+static int tb10x_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
+{
+ struct tb10x_gpio *tb10x_gpio = to_tb10x_gpio(chip);
+ int mask = BIT(offset);
+ int val = TB10X_GPIO_DIR_IN << offset;
+
+ tb10x_set_bits(tb10x_gpio, OFFSET_TO_REG_DDR, mask, val);
+
+ return 0;
+}
+
+static int tb10x_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ struct tb10x_gpio *tb10x_gpio = to_tb10x_gpio(chip);
+ int val;
+
+ val = tb10x_reg_read(tb10x_gpio, OFFSET_TO_REG_DATA);
+
+ if (val & BIT(offset))
+ return 1;
+ else
+ return 0;
+}
+
+static void tb10x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ struct tb10x_gpio *tb10x_gpio = to_tb10x_gpio(chip);
+ int mask = BIT(offset);
+ int val = value << offset;
+
+ tb10x_set_bits(tb10x_gpio, OFFSET_TO_REG_DATA, mask, val);
+}
+
+static int tb10x_gpio_direction_out(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ struct tb10x_gpio *tb10x_gpio = to_tb10x_gpio(chip);
+ int mask = BIT(offset);
+ int val = TB10X_GPIO_DIR_OUT << offset;
+
+ tb10x_set_bits(tb10x_gpio, OFFSET_TO_REG_DDR, mask, val);
+
+ return 0;
+}
+
+static int tb10x_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+ return pinctrl_request_gpio(chip->base + offset);
+}
+
+static void tb10x_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+ pinctrl_free_gpio(chip->base + offset);
+}
+
+static int tb10x_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ struct tb10x_gpio *tb10x_gpio = to_tb10x_gpio(chip);
+
+ return irq_create_mapping(tb10x_gpio->domain, offset);
+}
+
+static int tb10x_gpio_irq_set_type(struct irq_data *data, unsigned int type)
+{
+ if ((type & IRQF_TRIGGER_MASK) != IRQ_TYPE_EDGE_BOTH) {
+ pr_err("Only (both) edge triggered interrupts supported.\n");
+ return -EINVAL;
+ }
+
+ irqd_set_trigger_type(data, type);
+
+ return IRQ_SET_MASK_OK;
+}
+
+static irqreturn_t tb10x_gpio_irq_cascade(int irq, void *data)
+{
+ struct tb10x_gpio *tb10x_gpio = data;
+ u32 r = tb10x_reg_read(tb10x_gpio, OFFSET_TO_REG_CHANGE);
+ u32 m = tb10x_reg_read(tb10x_gpio, OFFSET_TO_REG_INT_EN);
+ const unsigned long bits = r & m;
+ int i;
+
+ for_each_set_bit(i, &bits, 32)
+ generic_handle_irq(irq_find_mapping(tb10x_gpio->domain, i));
+
+ return IRQ_HANDLED;
+}
+
+static int tb10x_gpio_probe(struct platform_device *pdev)
+{
+ struct tb10x_gpio *tb10x_gpio;
+ struct resource *mem;
+ struct device_node *dn = pdev->dev.of_node;
+ int ret = -EBUSY;
+ u32 ngpio;
+
+ if (!dn)
+ return -EINVAL;
+
+ if (of_property_read_u32(dn, "ngpio", &ngpio))
+ return -EINVAL;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mem) {
+ dev_err(&pdev->dev, "No memory resource defined.\n");
+ return -EINVAL;
+ }
+
+ tb10x_gpio = devm_kzalloc(&pdev->dev, sizeof(*tb10x_gpio), GFP_KERNEL);
+ if (tb10x_gpio == NULL)
+ return -ENOMEM;
+
+ spin_lock_init(&tb10x_gpio->spinlock);
+
+ tb10x_gpio->base = devm_ioremap_resource(&pdev->dev, mem);
+ if (!tb10x_gpio->base) {
+ dev_err(&pdev->dev, "Could not remap reg space.\n");
+ goto fail_ioremap;
+ }
+
+ tb10x_gpio->gc.label = of_node_full_name(dn);
+ tb10x_gpio->gc.dev = &pdev->dev;
+ tb10x_gpio->gc.owner = THIS_MODULE;
+ tb10x_gpio->gc.direction_input = tb10x_gpio_direction_in;
+ tb10x_gpio->gc.get = tb10x_gpio_get;
+ tb10x_gpio->gc.direction_output = tb10x_gpio_direction_out;
+ tb10x_gpio->gc.set = tb10x_gpio_set;
+ tb10x_gpio->gc.request = tb10x_gpio_request;
+ tb10x_gpio->gc.free = tb10x_gpio_free;
+ tb10x_gpio->gc.base = -1;
+ tb10x_gpio->gc.ngpio = ngpio;
+ tb10x_gpio->gc.can_sleep = 0;
+
+
+ ret = gpiochip_add(&tb10x_gpio->gc);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Could not add gpiochip.\n");
+ goto fail_gpiochip_registration;
+ }
+
+ platform_set_drvdata(pdev, tb10x_gpio);
+
+ if (of_find_property(dn, "interrupt-controller", NULL)) {
+ struct irq_chip_generic *gc;
+
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "No interrupt specified.\n");
+ goto fail_get_irq;
+ }
+
+ tb10x_gpio->gc.to_irq = tb10x_gpio_to_irq;
+ tb10x_gpio->irq = ret;
+
+ ret = devm_request_irq(&pdev->dev, ret, tb10x_gpio_irq_cascade,
+ IRQF_TRIGGER_NONE | IRQF_SHARED,
+ dev_name(&pdev->dev), tb10x_gpio);
+ if (ret != 0)
+ goto fail_request_irq;
+
+ tb10x_gpio->domain = irq_domain_add_linear(dn,
+ tb10x_gpio->gc.ngpio,
+ &irq_generic_chip_ops, NULL);
+ if (!tb10x_gpio->domain) {
+ ret = -ENOMEM;
+ goto fail_irq_domain;
+ }
+
+ ret = irq_alloc_domain_generic_chips(tb10x_gpio->domain,
+ tb10x_gpio->gc.ngpio, 1, tb10x_gpio->gc.label,
+ handle_edge_irq, IRQ_NOREQUEST, IRQ_NOPROBE,
+ IRQ_GC_INIT_MASK_CACHE);
+ if (ret)
+ goto fail_irq_domain;
+
+ gc = tb10x_gpio->domain->gc->gc[0];
+ gc->reg_base = tb10x_gpio->base;
+ gc->chip_types[0].type = IRQ_TYPE_EDGE_BOTH;
+ gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit;
+ gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit;
+ gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit;
+ gc->chip_types[0].chip.irq_set_type = tb10x_gpio_irq_set_type;
+ gc->chip_types[0].regs.ack = OFFSET_TO_REG_CHANGE;
+ gc->chip_types[0].regs.mask = OFFSET_TO_REG_INT_EN;
+ }
+
+ return 0;
+
+fail_irq_domain:
+fail_request_irq:
+fail_get_irq:
+ gpiochip_remove(&tb10x_gpio->gc);
+fail_gpiochip_registration:
+fail_ioremap:
+ return ret;
+}
+
+static int __exit tb10x_gpio_remove(struct platform_device *pdev)
+{
+ struct tb10x_gpio *tb10x_gpio = platform_get_drvdata(pdev);
+ int ret;
+
+ if (tb10x_gpio->gc.to_irq) {
+ irq_remove_generic_chip(tb10x_gpio->domain->gc->gc[0],
+ BIT(tb10x_gpio->gc.ngpio) - 1, 0, 0);
+ kfree(tb10x_gpio->domain->gc);
+ irq_domain_remove(tb10x_gpio->domain);
+ free_irq(tb10x_gpio->irq, tb10x_gpio);
+ }
+ ret = gpiochip_remove(&tb10x_gpio->gc);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct of_device_id tb10x_gpio_dt_ids[] = {
+ { .compatible = "abilis,tb10x-gpio" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tb10x_gpio_dt_ids);
+
+static struct platform_driver tb10x_gpio_driver = {
+ .probe = tb10x_gpio_probe,
+ .remove = tb10x_gpio_remove,
+ .driver = {
+ .name = "tb10x-gpio",
+ .of_match_table = of_match_ptr(tb10x_gpio_dt_ids),
+ .owner = THIS_MODULE,
+ }
+};
+
+static int __init ab_gpio_init(void)
+{
+ return platform_driver_register(&tb10x_gpio_driver);
+}
+
+static void __exit ab_gpio_exit(void)
+{
+ platform_driver_unregister(&tb10x_gpio_driver);
+}
+
+module_init(ab_gpio_init);
+module_exit(ab_gpio_exit);
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("tb10x gpio.");
+MODULE_VERSION("0.0.1");
--
1.7.1
--
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