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rtc: mt6397: Add support for the MediaTek MT6358 RTC 

This add support for the MediaTek MT6358 RTC. Driver using
compatible data to store different RTC_WRTGR address offset.
This replace RTC_WRTGR to RTC_WRTGR_MT6323 in mt6323-poweroff
driver which only needed by armv7 CPU without ATF.

Signed-off-by: Ran Bi <ran.bi@mediatek.com>
Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Sebastian Reichel <sre@kernel.org>
Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Ran Bi 2020-04-21 11:00:11 +08:00 committed by Lee Jones
parent 2b91c28f2a
commit 29ee40091e
3 changed files with 24 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/power/reset/mt6323-poweroff.c
View File

@ -30,7 +30,7 @@ static void mt6323_do_pwroff(void)
int ret;
regmap_write(pwrc->regmap, pwrc->base + RTC_BBPU, RTC_BBPU_KEY);
regmap_write(pwrc->regmap, pwrc->base + RTC_WRTGR, 1);
regmap_write(pwrc->regmap, pwrc->base + RTC_WRTGR_MT6323, 1);
ret = regmap_read_poll_timeout(pwrc->regmap,
pwrc->base + RTC_BBPU, val,

18
drivers/rtc/rtc-mt6397.c
View File

@ -9,6 +9,7 @@
#include <linux/mfd/mt6397/core.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/rtc.h>
@ -20,7 +21,7 @@ static int mtk_rtc_write_trigger(struct mt6397_rtc *rtc)
int ret;
u32 data;
ret = regmap_write(rtc->regmap, rtc->addr_base + RTC_WRTGR, 1);
ret = regmap_write(rtc->regmap, rtc->addr_base + rtc->data->wrtgr, 1);
if (ret < 0)
return ret;
@ -269,6 +270,8 @@ static int mtk_rtc_probe(struct platform_device *pdev)
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
rtc->addr_base = res->start;
rtc->data = of_device_get_match_data(&pdev->dev);
rtc->irq = platform_get_irq(pdev, 0);
if (rtc->irq < 0)
return rtc->irq;
@ -325,9 +328,18 @@ static int mt6397_rtc_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(mt6397_pm_ops, mt6397_rtc_suspend,
mt6397_rtc_resume);
static const struct mtk_rtc_data mt6358_rtc_data = {
.wrtgr = RTC_WRTGR_MT6358,
};
static const struct mtk_rtc_data mt6397_rtc_data = {
.wrtgr = RTC_WRTGR_MT6397,
};
static const struct of_device_id mt6397_rtc_of_match[] = {
{ .compatible = "mediatek,mt6323-rtc", },
{ .compatible = "mediatek,mt6397-rtc", },
{ .compatible = "mediatek,mt6323-rtc", .data = &mt6397_rtc_data },
{ .compatible = "mediatek,mt6358-rtc", .data = &mt6358_rtc_data },
{ .compatible = "mediatek,mt6397-rtc", .data = &mt6397_rtc_data },
{ }
};
MODULE_DEVICE_TABLE(of, mt6397_rtc_of_match);

9
include/linux/mfd/mt6397/rtc.h
View File

@ -18,7 +18,9 @@
#define RTC_BBPU_CBUSY BIT(6)
#define RTC_BBPU_KEY (0x43 << 8)
#define RTC_WRTGR 0x003c
#define RTC_WRTGR_MT6358 0x003a
#define RTC_WRTGR_MT6397 0x003c
#define RTC_WRTGR_MT6323 RTC_WRTGR_MT6397
#define RTC_IRQ_STA 0x0002
#define RTC_IRQ_STA_AL BIT(0)
@ -65,6 +67,10 @@
#define MTK_RTC_POLL_DELAY_US 10
#define MTK_RTC_POLL_TIMEOUT (jiffies_to_usecs(HZ))
struct mtk_rtc_data {
u32 wrtgr;
};
struct mt6397_rtc {
struct device *dev;
struct rtc_device *rtc_dev;
@ -74,6 +80,7 @@ struct mt6397_rtc {
struct regmap *regmap;
int irq;
u32 addr_base;
const struct mtk_rtc_data *data;
};
#endif /* _LINUX_MFD_MT6397_RTC_H_ */