diff options
author | Stijn Tintel <stijn@linux-ipv6.be> | 2019-02-02 21:53:15 +0100 |
---|---|---|
committer | Stijn Tintel <stijn@linux-ipv6.be> | 2019-02-06 07:39:39 +0200 |
commit | c30f7f402f1be7a7917b3dd604ee32be8ed20716 (patch) | |
tree | c858e61a864a9409408cf3eb58b7e8800112c2e6 /target/linux/brcm2708/patches-4.9/950-0198-bcm2835-gpio-exp-Driver-for-GPIO-expander-via-mailbo.patch | |
parent | 12310f05b7b080b016ec515796be437f4cd30b62 (diff) | |
download | upstream-c30f7f402f1be7a7917b3dd604ee32be8ed20716.tar.gz upstream-c30f7f402f1be7a7917b3dd604ee32be8ed20716.tar.bz2 upstream-c30f7f402f1be7a7917b3dd604ee32be8ed20716.zip |
brcm2708: drop 4.9 support
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/950-0198-bcm2835-gpio-exp-Driver-for-GPIO-expander-via-mailbo.patch')
-rw-r--r-- | target/linux/brcm2708/patches-4.9/950-0198-bcm2835-gpio-exp-Driver-for-GPIO-expander-via-mailbo.patch | 405 |
1 files changed, 0 insertions, 405 deletions
diff --git a/target/linux/brcm2708/patches-4.9/950-0198-bcm2835-gpio-exp-Driver-for-GPIO-expander-via-mailbo.patch b/target/linux/brcm2708/patches-4.9/950-0198-bcm2835-gpio-exp-Driver-for-GPIO-expander-via-mailbo.patch deleted file mode 100644 index 3d09d1dc3f..0000000000 --- a/target/linux/brcm2708/patches-4.9/950-0198-bcm2835-gpio-exp-Driver-for-GPIO-expander-via-mailbo.patch +++ /dev/null @@ -1,405 +0,0 @@ -From 2f8f62fbd42a55825da437faba4b6164f2e0bee9 Mon Sep 17 00:00:00 2001 -From: Dave Stevenson <dave.stevenson@raspberrypi.org> -Date: Mon, 20 Feb 2017 17:01:21 +0000 -Subject: [PATCH] bcm2835-gpio-exp: Driver for GPIO expander via mailbox - service - -Pi3 and Compute Module 3 have a GPIO expander that the -VPU communicates with. -There is a mailbox service that now allows control of this -expander, so add a kernel driver that can make use of it. - -Pwr_led node added to device-tree for Pi3. - -Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org> ---- - arch/arm/boot/dts/bcm2710-rpi-3-b.dts | 22 +++ - arch/arm/boot/dts/bcm2710-rpi-cm3.dts | 10 +- - arch/arm/configs/bcm2709_defconfig | 1 + - drivers/gpio/Kconfig | 7 + - drivers/gpio/Makefile | 1 + - drivers/gpio/gpio-bcm-exp.c | 256 +++++++++++++++++++++++++++++ - include/soc/bcm2835/raspberrypi-firmware.h | 4 + - 7 files changed, 300 insertions(+), 1 deletion(-) - create mode 100644 drivers/gpio/gpio-bcm-exp.c - ---- a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts -+++ b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts -@@ -96,6 +96,14 @@ - firmware = <&firmware>; - status = "okay"; - }; -+ -+ expgpio: expgpio { -+ compatible = "brcm,bcm2835-expgpio"; -+ gpio-controller; -+ #gpio-cells = <2>; -+ firmware = <&firmware>; -+ status = "okay"; -+ }; - }; - - &fb { -@@ -163,6 +171,16 @@ - linux,default-trigger = "mmc0"; - gpios = <&virtgpio 0 0>; - }; -+ -+ pwr_led: pwr { -+ label = "led1"; -+ linux,default-trigger = "input"; -+ gpios = <&expgpio 7 GPIO_ACTIVE_LOW>; -+ }; -+}; -+ -+&hdmi { -+ hpd-gpios = <&expgpio 4 GPIO_ACTIVE_LOW>; - }; - - &audio { -@@ -193,6 +211,10 @@ - act_led_activelow = <&act_led>,"gpios:8"; - act_led_trigger = <&act_led>,"linux,default-trigger"; - -+ pwr_led_gpio = <&pwr_led>,"gpios:4"; -+ pwr_led_activelow = <&pwr_led>,"gpios:8"; -+ pwr_led_trigger = <&pwr_led>,"linux,default-trigger"; -+ - audio = <&audio>,"status"; - watchdog = <&watchdog>,"status"; - random = <&random>,"status"; ---- a/arch/arm/boot/dts/bcm2710-rpi-cm3.dts -+++ b/arch/arm/boot/dts/bcm2710-rpi-cm3.dts -@@ -65,6 +65,14 @@ - firmware = <&firmware>; - status = "okay"; - }; -+ -+ expgpio: expgpio { -+ compatible = "brcm,bcm2835-expgpio"; -+ gpio-controller; -+ #gpio-cells = <2>; -+ firmware = <&firmware>; -+ status = "okay"; -+ }; - }; - - &fb { -@@ -123,7 +131,7 @@ - }; - - &hdmi { -- hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>; -+ hpd-gpios = <&expgpio 0 GPIO_ACTIVE_LOW>; - }; - - &audio { ---- a/arch/arm/configs/bcm2709_defconfig -+++ b/arch/arm/configs/bcm2709_defconfig -@@ -625,6 +625,7 @@ CONFIG_PPS=m - CONFIG_PPS_CLIENT_LDISC=m - CONFIG_PPS_CLIENT_GPIO=m - CONFIG_GPIO_SYSFS=y -+CONFIG_GPIO_BCM_EXP=y - CONFIG_GPIO_BCM_VIRT=y - CONFIG_GPIO_ARIZONA=m - CONFIG_GPIO_STMPE=y ---- a/drivers/gpio/Kconfig -+++ b/drivers/gpio/Kconfig -@@ -128,6 +128,13 @@ config GPIO_AXP209 - help - Say yes to enable GPIO support for the AXP209 PMIC - -+config GPIO_BCM_EXP -+ bool "Broadcom Exp GPIO" -+ depends on OF_GPIO && RASPBERRYPI_FIRMWARE && (ARCH_BCM2835 || COMPILE_TEST) -+ help -+ Turn on GPIO support for Broadcom chips using the firmware mailbox -+ to communicate with VideoCore on BCM283x chips. -+ - config GPIO_BCM_KONA - bool "Broadcom Kona GPIO" - depends on OF_GPIO && (ARCH_BCM_MOBILE || COMPILE_TEST) ---- a/drivers/gpio/Makefile -+++ b/drivers/gpio/Makefile -@@ -30,6 +30,7 @@ obj-$(CONFIG_GPIO_ARIZONA) += gpio-arizo - obj-$(CONFIG_GPIO_ATH79) += gpio-ath79.o - obj-$(CONFIG_GPIO_ASPEED) += gpio-aspeed.o - obj-$(CONFIG_GPIO_AXP209) += gpio-axp209.o -+obj-$(CONFIG_GPIO_BCM_EXP) += gpio-bcm-exp.o - obj-$(CONFIG_GPIO_BCM_KONA) += gpio-bcm-kona.o - obj-$(CONFIG_GPIO_BCM_VIRT) += gpio-bcm-virt.o - obj-$(CONFIG_GPIO_BRCMSTB) += gpio-brcmstb.o ---- /dev/null -+++ b/drivers/gpio/gpio-bcm-exp.c -@@ -0,0 +1,256 @@ -+/* -+ * Broadcom expander GPIO driver -+ * -+ * Uses the firmware mailbox service to communicate with the -+ * GPIO expander on the VPU. -+ * -+ * Copyright (C) 2017 Raspberry Pi Trading Ltd. -+ * -+ * Author: Dave Stevenson <dave.stevenson@raspberrypi.org> -+ * Based on gpio-bcm-virt.c by Dom Cobley <popcornmix@gmail.com> -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License as published by -+ * the Free Software Foundation; either version 2 of the License, or -+ * (at your option) any later version. -+ */ -+ -+#include <linux/err.h> -+#include <linux/gpio.h> -+#include <linux/module.h> -+#include <linux/platform_device.h> -+#include <linux/dma-mapping.h> -+#include <soc/bcm2835/raspberrypi-firmware.h> -+ -+#define MODULE_NAME "brcmexp-gpio" -+#define NUM_GPIO 8 -+ -+struct brcmexp_gpio { -+ struct gpio_chip gc; -+ struct device *dev; -+ struct rpi_firmware *fw; -+}; -+ -+struct gpio_set_config { -+ u32 gpio, direction, polarity, term_en, term_pull_up, state; -+}; -+ -+struct gpio_get_config { -+ u32 gpio, direction, polarity, term_en, term_pull_up; -+}; -+ -+struct gpio_get_set_state { -+ u32 gpio, state; -+}; -+ -+static int brcmexp_gpio_get_polarity(struct gpio_chip *gc, unsigned int off) -+{ -+ struct brcmexp_gpio *gpio; -+ struct gpio_get_config get; -+ int ret; -+ -+ gpio = container_of(gc, struct brcmexp_gpio, gc); -+ -+ get.gpio = off + gpio->gc.base; /* GPIO to update */ -+ -+ ret = rpi_firmware_property(gpio->fw, RPI_FIRMWARE_GET_GPIO_CONFIG, -+ &get, sizeof(get)); -+ if (ret) { -+ dev_err(gpio->dev, -+ "Failed to get GPIO %u config (%d)\n", off, ret); -+ return ret; -+ } -+ return get.polarity; -+} -+ -+static int brcmexp_gpio_dir_in(struct gpio_chip *gc, unsigned int off) -+{ -+ struct brcmexp_gpio *gpio; -+ struct gpio_set_config set_in; -+ int ret; -+ -+ gpio = container_of(gc, struct brcmexp_gpio, gc); -+ -+ set_in.gpio = off + gpio->gc.base; /* GPIO to update */ -+ set_in.direction = 0; /* Input */ -+ set_in.polarity = brcmexp_gpio_get_polarity(gc, off); -+ /* Retain existing setting */ -+ set_in.term_en = 0; /* termination disabled */ -+ set_in.term_pull_up = 0; /* n/a as termination disabled */ -+ set_in.state = 0; /* n/a as configured as an input */ -+ -+ ret = rpi_firmware_property(gpio->fw, RPI_FIRMWARE_SET_GPIO_CONFIG, -+ &set_in, sizeof(set_in)); -+ if (ret) { -+ dev_err(gpio->dev, -+ "Failed to set GPIO %u to input (%d)\n", -+ off, ret); -+ return ret; -+ } -+ return 0; -+} -+ -+static int brcmexp_gpio_dir_out(struct gpio_chip *gc, unsigned int off, int val) -+{ -+ struct brcmexp_gpio *gpio; -+ struct gpio_set_config set_out; -+ int ret; -+ -+ gpio = container_of(gc, struct brcmexp_gpio, gc); -+ -+ set_out.gpio = off + gpio->gc.base; /* GPIO to update */ -+ set_out.direction = 1; /* Output */ -+ set_out.polarity = brcmexp_gpio_get_polarity(gc, off); -+ /* Retain existing setting */ -+ set_out.term_en = 0; /* n/a as an output */ -+ set_out.term_pull_up = 0; /* n/a as termination disabled */ -+ set_out.state = val; /* Output state */ -+ -+ ret = rpi_firmware_property(gpio->fw, RPI_FIRMWARE_SET_GPIO_CONFIG, -+ &set_out, sizeof(set_out)); -+ if (ret) { -+ dev_err(gpio->dev, -+ "Failed to set GPIO %u to output (%d)\n", off, ret); -+ return ret; -+ } -+ return 0; -+} -+ -+static int brcmexp_gpio_get_direction(struct gpio_chip *gc, unsigned int off) -+{ -+ struct brcmexp_gpio *gpio; -+ struct gpio_get_config get; -+ int ret; -+ -+ gpio = container_of(gc, struct brcmexp_gpio, gc); -+ -+ get.gpio = off + gpio->gc.base; /* GPIO to update */ -+ -+ ret = rpi_firmware_property(gpio->fw, RPI_FIRMWARE_GET_GPIO_CONFIG, -+ &get, sizeof(get)); -+ if (ret) { -+ dev_err(gpio->dev, -+ "Failed to get GPIO %u config (%d)\n", off, ret); -+ return ret; -+ } -+ return get.direction ? GPIOF_DIR_OUT : GPIOF_DIR_IN; -+} -+ -+static int brcmexp_gpio_get(struct gpio_chip *gc, unsigned int off) -+{ -+ struct brcmexp_gpio *gpio; -+ struct gpio_get_set_state get; -+ int ret; -+ -+ gpio = container_of(gc, struct brcmexp_gpio, gc); -+ -+ get.gpio = off + gpio->gc.base; /* GPIO to update */ -+ get.state = 0; /* storage for returned value */ -+ -+ ret = rpi_firmware_property(gpio->fw, RPI_FIRMWARE_GET_GPIO_STATE, -+ &get, sizeof(get)); -+ if (ret) { -+ dev_err(gpio->dev, -+ "Failed to get GPIO %u state (%d)\n", off, ret); -+ return ret; -+ } -+ return !!get.state; -+} -+ -+static void brcmexp_gpio_set(struct gpio_chip *gc, unsigned int off, int val) -+{ -+ struct brcmexp_gpio *gpio; -+ struct gpio_get_set_state set; -+ int ret; -+ -+ gpio = container_of(gc, struct brcmexp_gpio, gc); -+ -+ off += gpio->gc.base; -+ -+ set.gpio = off + gpio->gc.base; /* GPIO to update */ -+ set.state = val; /* Output state */ -+ -+ ret = rpi_firmware_property(gpio->fw, RPI_FIRMWARE_SET_GPIO_STATE, -+ &set, sizeof(set)); -+ if (ret) -+ dev_err(gpio->dev, -+ "Failed to set GPIO %u state (%d)\n", off, ret); -+} -+ -+static int brcmexp_gpio_probe(struct platform_device *pdev) -+{ -+ int err = 0; -+ struct device *dev = &pdev->dev; -+ struct device_node *np = dev->of_node; -+ struct device_node *fw_node; -+ struct rpi_firmware *fw; -+ struct brcmexp_gpio *ucb; -+ -+ fw_node = of_parse_phandle(np, "firmware", 0); -+ if (!fw_node) { -+ dev_err(dev, "Missing firmware node\n"); -+ return -ENOENT; -+ } -+ -+ fw = rpi_firmware_get(fw_node); -+ if (!fw) -+ return -EPROBE_DEFER; -+ -+ ucb = devm_kzalloc(dev, sizeof(*ucb), GFP_KERNEL); -+ if (!ucb) -+ return -EINVAL; -+ -+ ucb->fw = fw; -+ ucb->dev = dev; -+ ucb->gc.label = MODULE_NAME; -+ ucb->gc.owner = THIS_MODULE; -+ ucb->gc.of_node = np; -+ ucb->gc.base = 128; -+ ucb->gc.ngpio = NUM_GPIO; -+ -+ ucb->gc.direction_input = brcmexp_gpio_dir_in; -+ ucb->gc.direction_output = brcmexp_gpio_dir_out; -+ ucb->gc.get_direction = brcmexp_gpio_get_direction; -+ ucb->gc.get = brcmexp_gpio_get; -+ ucb->gc.set = brcmexp_gpio_set; -+ ucb->gc.can_sleep = true; -+ -+ err = gpiochip_add(&ucb->gc); -+ if (err) -+ return err; -+ -+ platform_set_drvdata(pdev, ucb); -+ -+ return 0; -+} -+ -+static int brcmexp_gpio_remove(struct platform_device *pdev) -+{ -+ struct brcmexp_gpio *ucb = platform_get_drvdata(pdev); -+ -+ gpiochip_remove(&ucb->gc); -+ -+ return 0; -+} -+ -+static const struct of_device_id __maybe_unused brcmexp_gpio_ids[] = { -+ { .compatible = "brcm,bcm2835-expgpio" }, -+ { } -+}; -+MODULE_DEVICE_TABLE(of, brcmexp_gpio_ids); -+ -+static struct platform_driver brcmexp_gpio_driver = { -+ .driver = { -+ .name = MODULE_NAME, -+ .owner = THIS_MODULE, -+ .of_match_table = of_match_ptr(brcmexp_gpio_ids), -+ }, -+ .probe = brcmexp_gpio_probe, -+ .remove = brcmexp_gpio_remove, -+}; -+module_platform_driver(brcmexp_gpio_driver); -+ -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("Dave Stevenson <dave.stevenson@raspberrypi.org>"); -+MODULE_DESCRIPTION("brcm-exp GPIO driver"); -+MODULE_ALIAS("platform:brcmexp-gpio"); ---- a/include/soc/bcm2835/raspberrypi-firmware.h -+++ b/include/soc/bcm2835/raspberrypi-firmware.h -@@ -83,7 +83,11 @@ enum rpi_firmware_property_tag { - RPI_FIRMWARE_SET_TURBO = 0x00038009, - RPI_FIRMWARE_SET_CUSTOMER_OTP = 0x00038021, - RPI_FIRMWARE_SET_DOMAIN_STATE = 0x00038030, -+ RPI_FIRMWARE_GET_GPIO_STATE = 0x00030041, -+ RPI_FIRMWARE_SET_GPIO_STATE = 0x00038041, - RPI_FIRMWARE_SET_SDHOST_CLOCK = 0x00038042, -+ RPI_FIRMWARE_GET_GPIO_CONFIG = 0x00030043, -+ RPI_FIRMWARE_SET_GPIO_CONFIG = 0x00038043, - - /* Dispmanx TAGS */ - RPI_FIRMWARE_FRAMEBUFFER_ALLOCATE = 0x00040001, |