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Diffstat (limited to 'target/linux/mediatek/patches-4.14/0138-rtc-mediatek-add-driver-for-RTC-on-MT7622-SoC.patch')
-rw-r--r--target/linux/mediatek/patches-4.14/0138-rtc-mediatek-add-driver-for-RTC-on-MT7622-SoC.patch471
1 files changed, 0 insertions, 471 deletions
diff --git a/target/linux/mediatek/patches-4.14/0138-rtc-mediatek-add-driver-for-RTC-on-MT7622-SoC.patch b/target/linux/mediatek/patches-4.14/0138-rtc-mediatek-add-driver-for-RTC-on-MT7622-SoC.patch
deleted file mode 100644
index 8cf900d143..0000000000
--- a/target/linux/mediatek/patches-4.14/0138-rtc-mediatek-add-driver-for-RTC-on-MT7622-SoC.patch
+++ /dev/null
@@ -1,471 +0,0 @@
-From 4cf0b74c175cb5cb751e449223c0baafc2f98499 Mon Sep 17 00:00:00 2001
-From: Sean Wang <sean.wang@mediatek.com>
-Date: Mon, 23 Oct 2017 15:16:45 +0800
-Subject: [PATCH 138/224] rtc: mediatek: add driver for RTC on MT7622 SoC
-
-This patch introduces the driver for the RTC on MT7622 SoC.
-
-Signed-off-by: Sean Wang <sean.wang@mediatek.com>
-Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
-Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
----
- drivers/rtc/Kconfig | 10 ++
- drivers/rtc/Makefile | 1 +
- drivers/rtc/rtc-mt7622.c | 422 +++++++++++++++++++++++++++++++++++++++++++++++
- 3 files changed, 433 insertions(+)
- create mode 100644 drivers/rtc/rtc-mt7622.c
-
---- a/drivers/rtc/Kconfig
-+++ b/drivers/rtc/Kconfig
-@@ -1715,6 +1715,16 @@ config RTC_DRV_MT6397
-
- If you want to use Mediatek(R) RTC interface, select Y or M here.
-
-+config RTC_DRV_MT7622
-+ tristate "MediaTek SoC based RTC"
-+ depends on ARCH_MEDIATEK || COMPILE_TEST
-+ help
-+ This enables support for the real time clock built in the MediaTek
-+ SoCs.
-+
-+ This drive can also be built as a module. If so, the module
-+ will be called rtc-mt7622.
-+
- config RTC_DRV_XGENE
- tristate "APM X-Gene RTC"
- depends on HAS_IOMEM
---- a/drivers/rtc/Makefile
-+++ b/drivers/rtc/Makefile
-@@ -103,6 +103,7 @@ obj-$(CONFIG_RTC_DRV_MPC5121) += rtc-mpc
- obj-$(CONFIG_RTC_DRV_VRTC) += rtc-mrst.o
- obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o
- obj-$(CONFIG_RTC_DRV_MT6397) += rtc-mt6397.o
-+obj-$(CONFIG_RTC_DRV_MT7622) += rtc-mt7622.o
- obj-$(CONFIG_RTC_DRV_MV) += rtc-mv.o
- obj-$(CONFIG_RTC_DRV_MXC) += rtc-mxc.o
- obj-$(CONFIG_RTC_DRV_NUC900) += rtc-nuc900.o
---- /dev/null
-+++ b/drivers/rtc/rtc-mt7622.c
-@@ -0,0 +1,422 @@
-+/*
-+ * Driver for MediaTek SoC based RTC
-+ *
-+ * Copyright (C) 2017 Sean Wang <sean.wang@mediatek.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.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ */
-+
-+#include <linux/clk.h>
-+#include <linux/interrupt.h>
-+#include <linux/module.h>
-+#include <linux/of_address.h>
-+#include <linux/of_device.h>
-+#include <linux/platform_device.h>
-+#include <linux/rtc.h>
-+
-+#define MTK_RTC_DEV KBUILD_MODNAME
-+
-+#define MTK_RTC_PWRCHK1 0x4
-+#define RTC_PWRCHK1_MAGIC 0xc6
-+
-+#define MTK_RTC_PWRCHK2 0x8
-+#define RTC_PWRCHK2_MAGIC 0x9a
-+
-+#define MTK_RTC_KEY 0xc
-+#define RTC_KEY_MAGIC 0x59
-+
-+#define MTK_RTC_PROT1 0x10
-+#define RTC_PROT1_MAGIC 0xa3
-+
-+#define MTK_RTC_PROT2 0x14
-+#define RTC_PROT2_MAGIC 0x57
-+
-+#define MTK_RTC_PROT3 0x18
-+#define RTC_PROT3_MAGIC 0x67
-+
-+#define MTK_RTC_PROT4 0x1c
-+#define RTC_PROT4_MAGIC 0xd2
-+
-+#define MTK_RTC_CTL 0x20
-+#define RTC_RC_STOP BIT(0)
-+
-+#define MTK_RTC_DEBNCE 0x2c
-+#define RTC_DEBNCE_MASK GENMASK(2, 0)
-+
-+#define MTK_RTC_INT 0x30
-+#define RTC_INT_AL_STA BIT(4)
-+
-+/*
-+ * Ranges from 0x40 to 0x78 provide RTC time setup for year, month,
-+ * day of month, day of week, hour, minute and second.
-+ */
-+#define MTK_RTC_TREG(_t, _f) (0x40 + (0x4 * (_f)) + ((_t) * 0x20))
-+
-+#define MTK_RTC_AL_CTL 0x7c
-+#define RTC_AL_EN BIT(0)
-+#define RTC_AL_ALL GENMASK(7, 0)
-+
-+/*
-+ * The offset is used in the translation for the year between in struct
-+ * rtc_time and in hardware register MTK_RTC_TREG(x,MTK_YEA)
-+ */
-+#define MTK_RTC_TM_YR_OFFSET 100
-+
-+/*
-+ * The lowest value for the valid tm_year. RTC hardware would take incorrectly
-+ * tm_year 100 as not a leap year and thus it is also required being excluded
-+ * from the valid options.
-+ */
-+#define MTK_RTC_TM_YR_L (MTK_RTC_TM_YR_OFFSET + 1)
-+
-+/*
-+ * The most year the RTC can hold is 99 and the next to 99 in year register
-+ * would be wraparound to 0, for MT7622.
-+ */
-+#define MTK_RTC_HW_YR_LIMIT 99
-+
-+/* The highest value for the valid tm_year */
-+#define MTK_RTC_TM_YR_H (MTK_RTC_TM_YR_OFFSET + MTK_RTC_HW_YR_LIMIT)
-+
-+/* Simple macro helps to check whether the hardware supports the tm_year */
-+#define MTK_RTC_TM_YR_VALID(_y) ((_y) >= MTK_RTC_TM_YR_L && \
-+ (_y) <= MTK_RTC_TM_YR_H)
-+
-+/* Types of the function the RTC provides are time counter and alarm. */
-+enum {
-+ MTK_TC,
-+ MTK_AL,
-+};
-+
-+/* Indexes are used for the pointer to relevant registers in MTK_RTC_TREG */
-+enum {
-+ MTK_YEA,
-+ MTK_MON,
-+ MTK_DOM,
-+ MTK_DOW,
-+ MTK_HOU,
-+ MTK_MIN,
-+ MTK_SEC
-+};
-+
-+struct mtk_rtc {
-+ struct rtc_device *rtc;
-+ void __iomem *base;
-+ int irq;
-+ struct clk *clk;
-+};
-+
-+static void mtk_w32(struct mtk_rtc *rtc, u32 reg, u32 val)
-+{
-+ writel_relaxed(val, rtc->base + reg);
-+}
-+
-+static u32 mtk_r32(struct mtk_rtc *rtc, u32 reg)
-+{
-+ return readl_relaxed(rtc->base + reg);
-+}
-+
-+static void mtk_rmw(struct mtk_rtc *rtc, u32 reg, u32 mask, u32 set)
-+{
-+ u32 val;
-+
-+ val = mtk_r32(rtc, reg);
-+ val &= ~mask;
-+ val |= set;
-+ mtk_w32(rtc, reg, val);
-+}
-+
-+static void mtk_set(struct mtk_rtc *rtc, u32 reg, u32 val)
-+{
-+ mtk_rmw(rtc, reg, 0, val);
-+}
-+
-+static void mtk_clr(struct mtk_rtc *rtc, u32 reg, u32 val)
-+{
-+ mtk_rmw(rtc, reg, val, 0);
-+}
-+
-+static void mtk_rtc_hw_init(struct mtk_rtc *hw)
-+{
-+ /* The setup of the init sequence is for allowing RTC got to work */
-+ mtk_w32(hw, MTK_RTC_PWRCHK1, RTC_PWRCHK1_MAGIC);
-+ mtk_w32(hw, MTK_RTC_PWRCHK2, RTC_PWRCHK2_MAGIC);
-+ mtk_w32(hw, MTK_RTC_KEY, RTC_KEY_MAGIC);
-+ mtk_w32(hw, MTK_RTC_PROT1, RTC_PROT1_MAGIC);
-+ mtk_w32(hw, MTK_RTC_PROT2, RTC_PROT2_MAGIC);
-+ mtk_w32(hw, MTK_RTC_PROT3, RTC_PROT3_MAGIC);
-+ mtk_w32(hw, MTK_RTC_PROT4, RTC_PROT4_MAGIC);
-+ mtk_rmw(hw, MTK_RTC_DEBNCE, RTC_DEBNCE_MASK, 0);
-+ mtk_clr(hw, MTK_RTC_CTL, RTC_RC_STOP);
-+}
-+
-+static void mtk_rtc_get_alarm_or_time(struct mtk_rtc *hw, struct rtc_time *tm,
-+ int time_alarm)
-+{
-+ u32 year, mon, mday, wday, hour, min, sec;
-+
-+ /*
-+ * Read again until the field of the second is not changed which
-+ * ensures all fields in the consistent state. Note that MTK_SEC must
-+ * be read first. In this way, it guarantees the others remain not
-+ * changed when the results for two MTK_SEC consecutive reads are same.
-+ */
-+ do {
-+ sec = mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_SEC));
-+ min = mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_MIN));
-+ hour = mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_HOU));
-+ wday = mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_DOW));
-+ mday = mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_DOM));
-+ mon = mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_MON));
-+ year = mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_YEA));
-+ } while (sec != mtk_r32(hw, MTK_RTC_TREG(time_alarm, MTK_SEC)));
-+
-+ tm->tm_sec = sec;
-+ tm->tm_min = min;
-+ tm->tm_hour = hour;
-+ tm->tm_wday = wday;
-+ tm->tm_mday = mday;
-+ tm->tm_mon = mon - 1;
-+
-+ /* Rebase to the absolute year which userspace queries */
-+ tm->tm_year = year + MTK_RTC_TM_YR_OFFSET;
-+}
-+
-+static void mtk_rtc_set_alarm_or_time(struct mtk_rtc *hw, struct rtc_time *tm,
-+ int time_alarm)
-+{
-+ u32 year;
-+
-+ /* Rebase to the relative year which RTC hardware requires */
-+ year = tm->tm_year - MTK_RTC_TM_YR_OFFSET;
-+
-+ mtk_w32(hw, MTK_RTC_TREG(time_alarm, MTK_YEA), year);
-+ mtk_w32(hw, MTK_RTC_TREG(time_alarm, MTK_MON), tm->tm_mon + 1);
-+ mtk_w32(hw, MTK_RTC_TREG(time_alarm, MTK_DOW), tm->tm_wday);
-+ mtk_w32(hw, MTK_RTC_TREG(time_alarm, MTK_DOM), tm->tm_mday);
-+ mtk_w32(hw, MTK_RTC_TREG(time_alarm, MTK_HOU), tm->tm_hour);
-+ mtk_w32(hw, MTK_RTC_TREG(time_alarm, MTK_MIN), tm->tm_min);
-+ mtk_w32(hw, MTK_RTC_TREG(time_alarm, MTK_SEC), tm->tm_sec);
-+}
-+
-+static irqreturn_t mtk_rtc_alarmirq(int irq, void *id)
-+{
-+ struct mtk_rtc *hw = (struct mtk_rtc *)id;
-+ u32 irq_sta;
-+
-+ irq_sta = mtk_r32(hw, MTK_RTC_INT);
-+ if (irq_sta & RTC_INT_AL_STA) {
-+ /* Stop alarm also implicitly disables the alarm interrupt */
-+ mtk_w32(hw, MTK_RTC_AL_CTL, 0);
-+ rtc_update_irq(hw->rtc, 1, RTC_IRQF | RTC_AF);
-+
-+ /* Ack alarm interrupt status */
-+ mtk_w32(hw, MTK_RTC_INT, RTC_INT_AL_STA);
-+ return IRQ_HANDLED;
-+ }
-+
-+ return IRQ_NONE;
-+}
-+
-+static int mtk_rtc_gettime(struct device *dev, struct rtc_time *tm)
-+{
-+ struct mtk_rtc *hw = dev_get_drvdata(dev);
-+
-+ mtk_rtc_get_alarm_or_time(hw, tm, MTK_TC);
-+
-+ return rtc_valid_tm(tm);
-+}
-+
-+static int mtk_rtc_settime(struct device *dev, struct rtc_time *tm)
-+{
-+ struct mtk_rtc *hw = dev_get_drvdata(dev);
-+
-+ if (!MTK_RTC_TM_YR_VALID(tm->tm_year))
-+ return -EINVAL;
-+
-+ /* Stop time counter before setting a new one*/
-+ mtk_set(hw, MTK_RTC_CTL, RTC_RC_STOP);
-+
-+ mtk_rtc_set_alarm_or_time(hw, tm, MTK_TC);
-+
-+ /* Restart the time counter */
-+ mtk_clr(hw, MTK_RTC_CTL, RTC_RC_STOP);
-+
-+ return 0;
-+}
-+
-+static int mtk_rtc_getalarm(struct device *dev, struct rtc_wkalrm *wkalrm)
-+{
-+ struct mtk_rtc *hw = dev_get_drvdata(dev);
-+ struct rtc_time *alrm_tm = &wkalrm->time;
-+
-+ mtk_rtc_get_alarm_or_time(hw, alrm_tm, MTK_AL);
-+
-+ wkalrm->enabled = !!(mtk_r32(hw, MTK_RTC_AL_CTL) & RTC_AL_EN);
-+ wkalrm->pending = !!(mtk_r32(hw, MTK_RTC_INT) & RTC_INT_AL_STA);
-+
-+ return 0;
-+}
-+
-+static int mtk_rtc_setalarm(struct device *dev, struct rtc_wkalrm *wkalrm)
-+{
-+ struct mtk_rtc *hw = dev_get_drvdata(dev);
-+ struct rtc_time *alrm_tm = &wkalrm->time;
-+
-+ if (!MTK_RTC_TM_YR_VALID(alrm_tm->tm_year))
-+ return -EINVAL;
-+
-+ /*
-+ * Stop the alarm also implicitly including disables interrupt before
-+ * setting a new one.
-+ */
-+ mtk_clr(hw, MTK_RTC_AL_CTL, RTC_AL_EN);
-+
-+ /*
-+ * Avoid contention between mtk_rtc_setalarm and IRQ handler so that
-+ * disabling the interrupt and awaiting for pending IRQ handler to
-+ * complete.
-+ */
-+ synchronize_irq(hw->irq);
-+
-+ mtk_rtc_set_alarm_or_time(hw, alrm_tm, MTK_AL);
-+
-+ /* Restart the alarm with the new setup */
-+ mtk_w32(hw, MTK_RTC_AL_CTL, RTC_AL_ALL);
-+
-+ return 0;
-+}
-+
-+static const struct rtc_class_ops mtk_rtc_ops = {
-+ .read_time = mtk_rtc_gettime,
-+ .set_time = mtk_rtc_settime,
-+ .read_alarm = mtk_rtc_getalarm,
-+ .set_alarm = mtk_rtc_setalarm,
-+};
-+
-+static const struct of_device_id mtk_rtc_match[] = {
-+ { .compatible = "mediatek,mt7622-rtc" },
-+ { .compatible = "mediatek,soc-rtc" },
-+ {},
-+};
-+
-+static int mtk_rtc_probe(struct platform_device *pdev)
-+{
-+ struct mtk_rtc *hw;
-+ struct resource *res;
-+ int ret;
-+
-+ hw = devm_kzalloc(&pdev->dev, sizeof(*hw), GFP_KERNEL);
-+ if (!hw)
-+ return -ENOMEM;
-+
-+ platform_set_drvdata(pdev, hw);
-+
-+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ hw->base = devm_ioremap_resource(&pdev->dev, res);
-+ if (IS_ERR(hw->base))
-+ return PTR_ERR(hw->base);
-+
-+ hw->clk = devm_clk_get(&pdev->dev, "rtc");
-+ if (IS_ERR(hw->clk)) {
-+ dev_err(&pdev->dev, "No clock\n");
-+ return PTR_ERR(hw->clk);
-+ }
-+
-+ ret = clk_prepare_enable(hw->clk);
-+ if (ret)
-+ return ret;
-+
-+ hw->irq = platform_get_irq(pdev, 0);
-+ if (hw->irq < 0) {
-+ dev_err(&pdev->dev, "No IRQ resource\n");
-+ ret = hw->irq;
-+ goto err;
-+ }
-+
-+ ret = devm_request_irq(&pdev->dev, hw->irq, mtk_rtc_alarmirq,
-+ 0, dev_name(&pdev->dev), hw);
-+ if (ret) {
-+ dev_err(&pdev->dev, "Can't request IRQ\n");
-+ goto err;
-+ }
-+
-+ mtk_rtc_hw_init(hw);
-+
-+ device_init_wakeup(&pdev->dev, true);
-+
-+ hw->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
-+ &mtk_rtc_ops, THIS_MODULE);
-+ if (IS_ERR(hw->rtc)) {
-+ ret = PTR_ERR(hw->rtc);
-+ dev_err(&pdev->dev, "Unable to register device\n");
-+ goto err;
-+ }
-+
-+ return 0;
-+err:
-+ clk_disable_unprepare(hw->clk);
-+
-+ return ret;
-+}
-+
-+static int mtk_rtc_remove(struct platform_device *pdev)
-+{
-+ struct mtk_rtc *hw = platform_get_drvdata(pdev);
-+
-+ clk_disable_unprepare(hw->clk);
-+
-+ return 0;
-+}
-+
-+#ifdef CONFIG_PM_SLEEP
-+static int mtk_rtc_suspend(struct device *dev)
-+{
-+ struct mtk_rtc *hw = dev_get_drvdata(dev);
-+
-+ if (device_may_wakeup(dev))
-+ enable_irq_wake(hw->irq);
-+
-+ return 0;
-+}
-+
-+static int mtk_rtc_resume(struct device *dev)
-+{
-+ struct mtk_rtc *hw = dev_get_drvdata(dev);
-+
-+ if (device_may_wakeup(dev))
-+ disable_irq_wake(hw->irq);
-+
-+ return 0;
-+}
-+
-+static SIMPLE_DEV_PM_OPS(mtk_rtc_pm_ops, mtk_rtc_suspend, mtk_rtc_resume);
-+
-+#define MTK_RTC_PM_OPS (&mtk_rtc_pm_ops)
-+#else /* CONFIG_PM */
-+#define MTK_RTC_PM_OPS NULL
-+#endif /* CONFIG_PM */
-+
-+static struct platform_driver mtk_rtc_driver = {
-+ .probe = mtk_rtc_probe,
-+ .remove = mtk_rtc_remove,
-+ .driver = {
-+ .name = MTK_RTC_DEV,
-+ .of_match_table = mtk_rtc_match,
-+ .pm = MTK_RTC_PM_OPS,
-+ },
-+};
-+
-+module_platform_driver(mtk_rtc_driver);
-+
-+MODULE_DESCRIPTION("MediaTek SoC based RTC Driver");
-+MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
-+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-19 03:33:41 +0000