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author | jmbills <jason.m.bills@intel.com> | 2021-08-03 01:45:08 +0300 |
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committer | GitHub <noreply@github.com> | 2021-08-03 01:45:08 +0300 |
commit | 10ad77d5bc86709d8ff7f95e7040e39f1c153903 (patch) | |
tree | 307cedb87f4c0a329740c55ac364ed489d1d8fc2 /meta-quanta/meta-gbs/recipes-kernel/linux/linux-nuvoton/0004-ben-drivers-misc-Platform-driver-for-seven-segment-displ.patch | |
parent | c6b1c6ba7a01b7987d65d61c262c44c320193108 (diff) | |
parent | 67327ddc580cb9a85219a534844832a1682780d4 (diff) | |
download | openbmc-10ad77d5bc86709d8ff7f95e7040e39f1c153903.tar.xz |
Update
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.patch | 267 |
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 - |