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authorTony Lindgren <tony@atomide.com>2019-10-21 13:36:09 -0700
committerTony Lindgren <tony@atomide.com>2019-10-21 13:36:09 -0700
commit03856e928b0e1a1c274eece1dfe4330a362c37f3 (patch)
tree1f2837bfe816fe400a686acef09971af406267ad /drivers/bus
parent96b4597f0e3158f59eab4e851b2e1219ff06f6b9 (diff)
bus: ti-sysc: Handle mstandby quirk and use it for musb
We need swsup quirks for sidle and mstandby for musb to work properly. Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'drivers/bus')
-rw-r--r--drivers/bus/ti-sysc.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 5c5a8ffc77df..bbde5bc20247 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -917,6 +917,9 @@ set_midle:
return -EINVAL;
}
+ if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_MSTANDBY)
+ best_mode = SYSC_IDLE_NO;
+
reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift);
reg |= best_mode << regbits->midle_shift;
sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
@@ -978,6 +981,9 @@ static int sysc_disable_module(struct device *dev)
return ret;
}
+ if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_MSTANDBY)
+ best_mode = SYSC_IDLE_FORCE;
+
reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift);
reg |= best_mode << regbits->midle_shift;
sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg);
@@ -1251,6 +1257,8 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
SYSC_QUIRK("gpu", 0x50000000, 0x14, -1, -1, 0x00010201, 0xffffffff, 0),
SYSC_QUIRK("gpu", 0x50000000, 0xfe00, 0xfe10, -1, 0x40000000 , 0xffffffff,
SYSC_MODULE_QUIRK_SGX),
+ SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000050,
+ 0xffffffff, SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_SWSUP_MSTANDBY),
SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0500, 0xfffff0f0,
SYSC_MODULE_QUIRK_WDT),
/* Watchdog on am3 and am4 */
@@ -1309,8 +1317,6 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000008, 0xffffffff, 0),
SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, 0x14, 0x50700100, 0xffffffff, 0),
SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, -1, 0x50700101, 0xffffffff, 0),
- SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000050,
- 0xffffffff, 0),
SYSC_QUIRK("vfpe", 0, 0, 0x104, -1, 0x4d001200, 0xffffffff, 0),
#endif
};
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// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2019 BayLibre, SAS
 * Author: Neil Armstrong <narmstrong@baylibre.com>
 * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
 */
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/rtc.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/time64.h>

struct meson_vrtc_data {
	void __iomem *io_alarm;
	struct rtc_device *rtc;
	unsigned long alarm_time;
	bool enabled;
};

static int meson_vrtc_read_time(struct device *dev, struct rtc_time *tm)
{
	struct timespec64 time;

	dev_dbg(dev, "%s\n", __func__);
	ktime_get_raw_ts64(&time);
	rtc_time64_to_tm(time.tv_sec, tm);

	return 0;
}

static void meson_vrtc_set_wakeup_time(struct meson_vrtc_data *vrtc,
				       unsigned long time)
{
	writel_relaxed(time, vrtc->io_alarm);
}

static int meson_vrtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
{
	struct meson_vrtc_data *vrtc = dev_get_drvdata(dev);

	dev_dbg(dev, "%s: alarm->enabled=%d\n", __func__, alarm->enabled);
	if (alarm->enabled)
		vrtc->alarm_time = rtc_tm_to_time64(&alarm->time);
	else
		vrtc->alarm_time = 0;

	return 0;
}

static int meson_vrtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
	struct meson_vrtc_data *vrtc = dev_get_drvdata(dev);

	vrtc->enabled = enabled;
	return 0;
}

static const struct rtc_class_ops meson_vrtc_ops = {
	.read_time = meson_vrtc_read_time,
	.set_alarm = meson_vrtc_set_alarm,
	.alarm_irq_enable = meson_vrtc_alarm_irq_enable,
};

static int meson_vrtc_probe(struct platform_device *pdev)
{
	struct meson_vrtc_data *vrtc;
	int ret;

	vrtc = devm_kzalloc(&pdev->dev, sizeof(*vrtc), GFP_KERNEL);
	if (!vrtc)
		return -ENOMEM;

	vrtc->io_alarm = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(vrtc->io_alarm))
		return PTR_ERR(vrtc->io_alarm);

	device_init_wakeup(&pdev->dev, 1);

	platform_set_drvdata(pdev, vrtc);

	vrtc->rtc = devm_rtc_allocate_device(&pdev->dev);
	if (IS_ERR(vrtc->rtc))
		return PTR_ERR(vrtc->rtc);

	vrtc->rtc->ops = &meson_vrtc_ops;
	ret = rtc_register_device(vrtc->rtc);
	if (ret)
		return ret;

	return 0;
}

static int __maybe_unused meson_vrtc_suspend(struct device *dev)
{
	struct meson_vrtc_data *vrtc = dev_get_drvdata(dev);

	dev_dbg(dev, "%s\n", __func__);
	if (vrtc->alarm_time) {
		unsigned long local_time;
		long alarm_secs;
		struct timespec64 time;

		ktime_get_raw_ts64(&time);
		local_time = time.tv_sec;

		dev_dbg(dev, "alarm_time = %lus, local_time=%lus\n",
			vrtc->alarm_time, local_time);
		alarm_secs = vrtc->alarm_time - local_time;
		if (alarm_secs > 0) {
			meson_vrtc_set_wakeup_time(vrtc, alarm_secs);
			dev_dbg(dev, "system will wakeup in %lds.\n",
				alarm_secs);
		} else {
			dev_err(dev, "alarm time already passed: %lds.\n",
				alarm_secs);
		}
	}

	return 0;
}

static int __maybe_unused meson_vrtc_resume(struct device *dev)
{
	struct meson_vrtc_data *vrtc = dev_get_drvdata(dev);

	dev_dbg(dev, "%s\n", __func__);

	vrtc->alarm_time = 0;
	meson_vrtc_set_wakeup_time(vrtc, 0);
	return 0;
}

static SIMPLE_DEV_PM_OPS(meson_vrtc_pm_ops,
			 meson_vrtc_suspend, meson_vrtc_resume);

static const struct of_device_id meson_vrtc_dt_match[] = {
	{ .compatible = "amlogic,meson-vrtc"},
	{},
};
MODULE_DEVICE_TABLE(of, meson_vrtc_dt_match);

static struct platform_driver meson_vrtc_driver = {
	.probe = meson_vrtc_probe,
	.driver = {
		.name = "meson-vrtc",
		.of_match_table = meson_vrtc_dt_match,
		.pm = &meson_vrtc_pm_ops,
	},
};

module_platform_driver(meson_vrtc_driver);

MODULE_DESCRIPTION("Amlogic Virtual Wakeup RTC Timer driver");
MODULE_LICENSE("GPL");