diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0008-vegman-kernel-add-RTC-driver-for-PCHC620.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0008-vegman-kernel-add-RTC-driver-for-PCHC620.patch | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0008-vegman-kernel-add-RTC-driver-for-PCHC620.patch b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0008-vegman-kernel-add-RTC-driver-for-PCHC620.patch deleted file mode 100644 index 1622a01e5..000000000 --- a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0008-vegman-kernel-add-RTC-driver-for-PCHC620.patch +++ /dev/null @@ -1,205 +0,0 @@ -From b80e1dea7595519edbabf3e12b6d31f0e128f901 Mon Sep 17 00:00:00 2001 -From: Ivan Mikhaylov <i.mikhaylov@yadro.com> -Date: Mon, 12 Jul 2021 10:46:22 +0300 -Subject: [PATCH] vegman: kernel: add RTC driver for PCHC620 - -Signed-off-by: Ivan Mikhaylov <i.mikhaylov@yadro.com> ---- - drivers/rtc/Kconfig | 10 +++ - drivers/rtc/Makefile | 1 + - drivers/rtc/rtc-pchc620.c | 150 ++++++++++++++++++++++++++++++++++++++ - 3 files changed, 161 insertions(+) - create mode 100644 drivers/rtc/rtc-pchc620.c - -diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig -index 1adf9f815652..79aba84dd19f 100644 ---- a/drivers/rtc/Kconfig -+++ b/drivers/rtc/Kconfig -@@ -564,6 +564,16 @@ config RTC_DRV_PALMAS - This driver can also be built as a module. If so, the module - will be called rtc-palma. - -+config RTC_DRV_PCHC620 -+ tristate "PCH C620 RTC driver" -+ help -+ If you say yes here you get support for the Intel C620 Series PCH -+ built-in read-only RTC. This driver is not for in-system use on x86, -+ but rather is for external access over I2C from a BMC. -+ -+ This driver can also be built as a module. If so, the module -+ will be called rtc-pchc620. -+ - config RTC_DRV_TPS6586X - tristate "TI TPS6586X RTC driver" - depends on MFD_TPS6586X -diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile -index 4ac8f19fb631..87ab76563a59 100644 ---- a/drivers/rtc/Makefile -+++ b/drivers/rtc/Makefile -@@ -118,6 +118,7 @@ obj-$(CONFIG_RTC_DRV_MXC_V2) += rtc-mxc_v2.o - obj-$(CONFIG_RTC_DRV_OMAP) += rtc-omap.o - obj-$(CONFIG_RTC_DRV_OPAL) += rtc-opal.o - obj-$(CONFIG_RTC_DRV_PALMAS) += rtc-palmas.o -+obj-$(CONFIG_RTC_DRV_PCHC620) += rtc-pchc620.o - obj-$(CONFIG_RTC_DRV_PCAP) += rtc-pcap.o - obj-$(CONFIG_RTC_DRV_PCF2123) += rtc-pcf2123.o - obj-$(CONFIG_RTC_DRV_PCF2127) += rtc-pcf2127.o -diff --git a/drivers/rtc/rtc-pchc620.c b/drivers/rtc/rtc-pchc620.c -new file mode 100644 -index 000000000000..a944b327ca67 ---- /dev/null -+++ b/drivers/rtc/rtc-pchc620.c -@@ -0,0 +1,150 @@ -+// SPDX-License-Identifier: GPL-2.0+ -+/* -+ * RTC driver for PCHC620 -+ * Copyright (C) 2021 YADRO -+ */ -+ -+#include <linux/i2c.h> -+#include <linux/slab.h> -+#include <linux/rtc.h> -+#include <linux/bcd.h> -+#include <linux/module.h> -+#include <linux/regmap.h> -+ -+#define PCH_REG_FORCE_OFF 0x00 -+#define PCH_REG_SC 0x09 -+#define PCH_REG_MN 0x0a -+#define PCH_REG_HR 0x0b -+#define PCH_REG_DW 0x0c -+#define PCH_REG_DM 0x0d -+#define PCH_REG_MO 0x0e -+#define PCH_REG_YR 0x0f -+ -+#define NUM_TIME_REGS (PCH_REG_YR - PCH_REG_SC + 1) -+ -+struct pch { -+ struct rtc_device *rtc; -+ struct regmap *regmap; -+}; -+ -+static int pchc620_rtc_read_time(struct device *dev, struct rtc_time *tm) -+{ -+ struct i2c_client *client = to_i2c_client(dev); -+ struct pch *pch = i2c_get_clientdata(client); -+ unsigned char rtc_data[NUM_TIME_REGS] = {0}; -+ int rc; -+ -+ rc = regmap_bulk_read(pch->regmap, PCH_REG_SC, rtc_data, NUM_TIME_REGS); -+ if (rc < 0) { -+ dev_err(dev, "Fail to read time reg(%d)\n", rc); -+ return rc; -+ } -+ -+ tm->tm_sec = bcd2bin(rtc_data[0]); -+ tm->tm_min = bcd2bin(rtc_data[1]); -+ tm->tm_hour = bcd2bin(rtc_data[2]); -+ tm->tm_wday = rtc_data[3]; -+ tm->tm_mday = bcd2bin(rtc_data[4]); -+ tm->tm_mon = bcd2bin(rtc_data[5]) - 1; -+ tm->tm_year = bcd2bin(rtc_data[6]) + 100; -+ -+ return 0; -+} -+ -+static ssize_t pch_force_off(struct device *dev, -+ struct device_attribute *attr, -+ const char *buf, size_t count) -+{ -+ struct i2c_client *client = to_i2c_client(dev); -+ struct pch *pch = i2c_get_clientdata(client); -+ unsigned long val; -+ int rc; -+ -+ if (kstrtoul(buf, 10, &val)) -+ return -EINVAL; -+ -+ if (val) { -+ /* 0x02 host force off */ -+ rc = regmap_write(pch->regmap, PCH_REG_FORCE_OFF, 0x2); -+ if (rc < 0) { -+ dev_err(dev, "Fail to read time reg(%d)\n", rc); -+ return rc; -+ } -+ } -+ -+ return 0; -+} -+static DEVICE_ATTR(force_off, S_IWUSR | S_IWGRP, NULL, pch_force_off); -+ -+static const struct rtc_class_ops pchc620_rtc_ops = { -+ .read_time = pchc620_rtc_read_time, -+}; -+ -+static const struct regmap_config pchc620_rtc_regmap_config = { -+ .reg_bits = 8, -+ .val_bits = 8, -+ .use_single_read = true, -+}; -+ -+static int pchc620_rtc_probe(struct i2c_client *client, -+ const struct i2c_device_id *id) -+{ -+ struct pch *pch; -+ int rc; -+ -+ pch = devm_kzalloc(&client->dev, sizeof(*pch), GFP_KERNEL); -+ if (!pch) -+ return -ENOMEM; -+ -+ pch->regmap = devm_regmap_init_i2c(client, &pchc620_rtc_regmap_config); -+ if (IS_ERR(pch->regmap)) { -+ dev_err(&client->dev, "regmap_init failed\n"); -+ return PTR_ERR(pch->regmap); -+ } -+ -+ i2c_set_clientdata(client, pch); -+ -+ pch->rtc = devm_rtc_device_register(&client->dev, "pch-rtc", -+ &pchc620_rtc_ops, THIS_MODULE); -+ if (IS_ERR(pch->rtc)) -+ return PTR_ERR(pch->rtc); -+ -+ rc = sysfs_create_file(&client->dev.kobj, &dev_attr_force_off.attr); -+ if (rc) -+ return rc; -+ -+ return 0; -+} -+ -+static int pchc620_rtc_remove(struct i2c_client *client) -+{ -+ sysfs_remove_file(&client->dev.kobj, &dev_attr_force_off.attr); -+ return 0; -+} -+ -+static const struct i2c_device_id pchc620_rtc_id[] = { -+ { "pchc620-rtc", 0 }, -+ { } -+}; -+MODULE_DEVICE_TABLE(i2c, pchc620_rtc_id); -+ -+static const struct of_device_id pchc620_rtc_of_match[] = { -+ { .compatible = "rtc,pchc620", }, -+ { } -+}; -+MODULE_DEVICE_TABLE(of, pchc620_rtc_of_match); -+ -+static struct i2c_driver pchc620_rtc_driver = { -+ .driver = { -+ .name = "pchc620-rtc", -+ .of_match_table = pchc620_rtc_of_match, -+ }, -+ .probe = pchc620_rtc_probe, -+ .remove = pchc620_rtc_remove, -+ .id_table = pchc620_rtc_id, -+}; -+module_i2c_driver(pchc620_rtc_driver); -+ -+MODULE_DESCRIPTION("RTC PCHC620 driver"); -+MODULE_AUTHOR("Ivan Mikhaylov <i.mikhaylov@yadro.com>"); -+MODULE_LICENSE("GPL"); --- -2.31.1 - |