meta-quanta: gbs: add kernel config and drivers
1. set kernel config for GBS machine
2. add AMD CPU temperature hwmon driver
3. add seven segment display drivers
Signed-off-by: George Hung <george.hung@quantatw.com>
Change-Id: I451b789fa842181a0c191ef9aff2ae8c88b8a6ee
diff --git a/meta-gbs/recipes-kernel/linux/linux-nuvoton/0004-ben-drivers-misc-Platform-driver-for-seven-segment-displ.patch b/meta-gbs/recipes-kernel/linux/linux-nuvoton/0004-ben-drivers-misc-Platform-driver-for-seven-segment-displ.patch
new file mode 100644
index 0000000..b166c78
--- /dev/null
+++ b/meta-gbs/recipes-kernel/linux/linux-nuvoton/0004-ben-drivers-misc-Platform-driver-for-seven-segment-displ.patch
@@ -0,0 +1,267 @@
+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
+