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Diffstat (limited to 'meta-quanta/meta-gbs/recipes-kernel/linux/linux-nuvoton/0004-ben-drivers-misc-Platform-driver-for-seven-segment-displ.patch')
-rw-r--r--meta-quanta/meta-gbs/recipes-kernel/linux/linux-nuvoton/0004-ben-drivers-misc-Platform-driver-for-seven-segment-displ.patch267
1 files changed, 0 insertions, 267 deletions
diff --git a/meta-quanta/meta-gbs/recipes-kernel/linux/linux-nuvoton/0004-ben-drivers-misc-Platform-driver-for-seven-segment-displ.patch b/meta-quanta/meta-gbs/recipes-kernel/linux/linux-nuvoton/0004-ben-drivers-misc-Platform-driver-for-seven-segment-displ.patch
deleted file mode 100644
index b166c78b8..000000000
--- a/meta-quanta/meta-gbs/recipes-kernel/linux/linux-nuvoton/0004-ben-drivers-misc-Platform-driver-for-seven-segment-displ.patch
+++ /dev/null
@@ -1,267 +0,0 @@
-From ea3e732d2c4a609e621346a96d37713820640196 Mon Sep 17 00:00:00 2001
-From: Jaghathiswari Rankappagounder Natarajan <jaghu@google.com>
-Date: Fri, 27 Jul 2018 12:36:24 -0700
-Subject: [PATCH 3/3] drivers: misc: Platform driver for seven segment display
- support
-
-Platform device driver which provides an API for displaying on two
-7-segment displays, and implements the required bit-banging.
-The hardware assumed is 74HC164 wired to two 7-segment displays.
-
-Signed-off-by: Jaghathiswari Rankappagounder Natarajan <jaghu@google.com>
-Signed-off-by: Kun Yi <kunyi@google.com>
-Signed-off-by: Benjamin Fair <benjaminfair@google.com>
----
- drivers/misc/Kconfig | 8 ++
-# drivers/misc/Makefile | 2 ++
- drivers/misc/seven_seg_gpio.c | 205 ++++++++++++++++++++++++++++++++++
- 3 files changed, 215 insertions(+)
- create mode 100644 drivers/misc/seven_seg_gpio.c
-
-diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
-index d443de886346..e10984e3288f 100644
---- a/drivers/misc/Kconfig
-+++ b/drivers/misc/Kconfig
-@@ -481,6 +481,14 @@ config SEVEN_SEGMENT_DISPLAY
- any conversion methods necessary to map the user input
- to two 7-segment displays.
-
-+config SEVEN_SEGMENT_GPIO
-+ tristate "Platform driver to update seven segment display"
-+ depends on SEVEN_SEGMENT_DISPLAY
-+ help
-+ Platform device driver which provides an API for displaying on two
-+ 7-segment displays, and implements the required bit-banging.
-+ The hardware assumed is 74HC164 wired to two 7-segment displays.
-+
- config PCI_ENDPOINT_TEST
- depends on PCI
- select CRC32
-# diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
-# index 402bcc3c9961..f39bec664d92 100644
-# --- a/drivers/misc/Makefile
-# +++ b/drivers/misc/Makefile
-# @@ -53,6 +53,8 @@ obj-$(CONFIG_GENWQE) += genwqe/
-# obj-$(CONFIG_ECHO) += echo/
-# obj-$(CONFIG_VEXPRESS_SYSCFG) += vexpress-syscfg.o
-# obj-$(CONFIG_CXL_BASE) += cxl/
-# +obj-$(CONFIG_SEVEN_SEGMENT_DISPLAY) += seven_seg_disp.o
-# +obj-$(CONFIG_SEVEN_SEGMENT_GPIO) += seven_seg_gpio.o
-# obj-$(CONFIG_ASPEED_LPC_CTRL) += aspeed-lpc-ctrl.o
-# obj-$(CONFIG_ASPEED_LPC_SNOOP) += aspeed-lpc-snoop.o
-# obj-$(CONFIG_ASPEED_LPC_MBOX) += aspeed-lpc-mbox.o
-
-diff --git a/drivers/misc/seven_seg_gpio.c b/drivers/misc/seven_seg_gpio.c
-new file mode 100644
-index 000000000000..e03ea7f8b848
---- /dev/null
-+++ b/drivers/misc/seven_seg_gpio.c
-@@ -0,0 +1,205 @@
-+/*
-+ * Copyright (C) 2016 Google, Inc
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 or later as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/timer.h>
-+#include <linux/jiffies.h>
-+#include <linux/sizes.h>
-+#include <linux/io.h>
-+#include <linux/delay.h>
-+#include <linux/uaccess.h>
-+#include <linux/mutex.h>
-+#include <linux/of_platform.h>
-+#include <linux/gpio/consumer.h>
-+
-+#include "seven_seg_disp.h"
-+
-+#define DELAY_INTVL_US 1
-+
-+#define CLOCK_GPIO_NAME "clock"
-+#define DATA_GPIO_NAME "data"
-+#define CLEAR_GPIO_NAME "clear"
-+
-+struct seven_seg_gpio_info {
-+ u16 curr_disp_value;
-+ u16 refresh_interval;
-+ struct timer_list update_timer;
-+ struct gpio_desc *clock_gpio;
-+ struct gpio_desc *data_gpio;
-+ struct gpio_desc *clear_gpio;
-+};
-+
-+static void update_seven_seg_gpio_data(struct device *dev, u16 data)
-+{
-+ struct platform_device *pdev;
-+ struct seven_seg_gpio_info *gpio_info;
-+
-+ pdev = container_of(dev, struct platform_device, dev);
-+ if (pdev == NULL) {
-+ pr_err("invalid NULL platform_device\n");
-+ return;
-+ }
-+
-+ gpio_info = platform_get_drvdata(pdev);
-+ if (gpio_info == NULL) {
-+ pr_err("invalid NULL gpio_info\n");
-+ return;
-+ }
-+
-+ gpio_info->curr_disp_value = data;
-+}
-+
-+static void clear_seven_seg_gpio_data(struct device *dev, u16 data)
-+{
-+ struct platform_device *pdev;
-+ struct seven_seg_gpio_info *gpio_info;
-+
-+ pdev = container_of(dev, struct platform_device, dev);
-+ if (pdev == NULL) {
-+ pr_err("invalid NULL platform_device\n");
-+ return;
-+ }
-+
-+ gpio_info = platform_get_drvdata(pdev);
-+ if (gpio_info == NULL) {
-+ pr_err("invalid NULL gpio_info\n");
-+ return;
-+ }
-+
-+ gpio_info->curr_disp_value = 0;
-+}
-+
-+static void send_seven_seg_gpio_data(u16 disp_data,
-+ struct seven_seg_gpio_info *gpio_info)
-+{
-+ int i;
-+
-+ gpiod_set_value(gpio_info->clear_gpio, 0);
-+ udelay(DELAY_INTVL_US);
-+ gpiod_set_value(gpio_info->clear_gpio, 1);
-+ udelay(DELAY_INTVL_US);
-+
-+ for (i = 0; i < 16; i++) {
-+ if (disp_data & 0x01)
-+ gpiod_set_value(gpio_info->data_gpio, 1);
-+ else
-+ gpiod_set_value(gpio_info->data_gpio, 0);
-+
-+ udelay(DELAY_INTVL_US);
-+
-+ gpiod_set_value(gpio_info->clock_gpio, 0);
-+ udelay(DELAY_INTVL_US);
-+ gpiod_set_value(gpio_info->clock_gpio, 1);
-+ udelay(DELAY_INTVL_US);
-+
-+ disp_data >>= 1;
-+ }
-+}
-+
-+static void disp_refresh_timer_handler(struct timer_list *t)
-+{
-+ u16 disp_data;
-+ struct seven_seg_gpio_info *gpio_info =
-+ from_timer(gpio_info, t, update_timer);
-+ disp_data = gpio_info->curr_disp_value;
-+
-+ send_seven_seg_gpio_data(disp_data, gpio_info);
-+ mod_timer(&gpio_info->update_timer,
-+ jiffies + msecs_to_jiffies(gpio_info->refresh_interval));
-+}
-+
-+static const struct of_device_id of_seven_seg_gpio_match[] = {
-+ { .compatible = "seven-seg-gpio-dev" },
-+ {},
-+};
-+
-+MODULE_DEVICE_TABLE(of, of_seven_seg_gpio_match);
-+
-+static int seven_seg_gpio_probe(struct platform_device *pdev)
-+{
-+ u16 interval;
-+ int result;
-+ struct seven_seg_gpio_info *gpio_info;
-+ struct device *dev = &pdev->dev;
-+ struct seven_seg_disp_dev *disp_dev;
-+
-+ gpio_info = devm_kzalloc(dev,
-+ sizeof(struct seven_seg_gpio_info),
-+ GFP_KERNEL);
-+ if (gpio_info == NULL)
-+ return -ENOMEM;
-+
-+ /* Requesting the clock gpio */
-+ gpio_info->clock_gpio = devm_gpiod_get(dev, CLOCK_GPIO_NAME,
-+ GPIOD_OUT_HIGH);
-+ if (IS_ERR(gpio_info->clock_gpio))
-+ return PTR_ERR(gpio_info->clock_gpio);
-+
-+ /* Requesting the data gpio */
-+ gpio_info->data_gpio = devm_gpiod_get(dev, DATA_GPIO_NAME,
-+ GPIOD_OUT_HIGH);
-+ if (IS_ERR(gpio_info->data_gpio))
-+ return PTR_ERR(gpio_info->data_gpio);
-+
-+ /* Requesting the clear gpio */
-+ gpio_info->clear_gpio = devm_gpiod_get(dev, CLEAR_GPIO_NAME,
-+ GPIOD_OUT_HIGH);
-+ if (IS_ERR(gpio_info->clear_gpio))
-+ return PTR_ERR(gpio_info->clear_gpio);
-+
-+ result = of_property_read_u16(pdev->dev.of_node,
-+ "refresh-interval-ms", &interval);
-+ gpio_info->refresh_interval = result ? DEFAULT_REFRESH_INTERVAL_MS :
-+ interval;
-+
-+ /* Start timer to update seven segment display every second */
-+ timer_setup(&gpio_info->update_timer, disp_refresh_timer_handler, 0);
-+ result = mod_timer(&gpio_info->update_timer,
-+ jiffies +
-+ msecs_to_jiffies(gpio_info->refresh_interval));
-+ if (result)
-+ return result;
-+
-+ gpio_info->curr_disp_value = 0;
-+
-+ platform_set_drvdata(pdev, gpio_info);
-+
-+ disp_dev = devm_kzalloc(dev, sizeof(struct seven_seg_disp_dev),
-+ GFP_KERNEL);
-+ disp_dev->parent = *dev;
-+ seven_seg_setup_cdev(disp_dev, &update_seven_seg_gpio_data);
-+ return 0;
-+}
-+
-+static int seven_seg_gpio_remove(struct platform_device *pdev)
-+{
-+ struct seven_seg_gpio_info *gpio_info = platform_get_drvdata(pdev);
-+ struct seven_seg_disp_dev *disp_dev =
-+ container_of(&pdev->dev,
-+ struct seven_seg_disp_dev, parent);
-+ seven_seg_rem_cdev(disp_dev);
-+ del_timer_sync(&gpio_info->update_timer);
-+ platform_set_drvdata(pdev, NULL);
-+ return 0;
-+}
-+
-+static struct platform_driver seven_seg_gpio_driver = {
-+ .probe = seven_seg_gpio_probe,
-+ .remove = seven_seg_gpio_remove,
-+ .driver = {
-+ .name = "seven-seg-gpio",
-+ .of_match_table = of_seven_seg_gpio_match,
-+ },
-+};
-+
-+module_platform_driver(seven_seg_gpio_driver);
-+
-+MODULE_LICENSE("GPL");
-+MODULE_AUTHOR("Jaghathiswari Rankappagounder Natarajan <jaghu@google.com>");
-+MODULE_DESCRIPTION("Seven segment display driver using GPIO config");
---
-2.22.0.770.g0f2c4a37fd-goog
-
generated by cgit v1.2.3 (git 2.39.0) at 2024-06-25 08:53:57 +0300