diff options
| author | Anson Huang <anson.huang@nxp.com> | 2019-01-22 03:29:24 +0000 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2019-02-07 20:45:39 +0100 |
| commit | 13a929f38ad742200270389cedc78c1859726bd8 (patch) | |
| tree | 4046453d2e2c1bb0317c9f6567b1690f1fe27301 /drivers/rtc | |
| parent | 761acdda5c2cc89208a94941f69579923420c8e9 (diff) | |
rtc: imx-sc: add rtc set time support
This patch adds i.MX system controller RTC set time support, the
RTC set time is implemented via SIP(silicon provider) runtime
service call and ARM-Trusted-Firmware will communicate with system
controller via MU(message unit) IPC to set RTC time.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-imx-sc.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-imx-sc.c b/drivers/rtc/rtc-imx-sc.c index 7ff08544532a..60570a278bb0 100644 --- a/drivers/rtc/rtc-imx-sc.c +++ b/drivers/rtc/rtc-imx-sc.c @@ -3,6 +3,7 @@ * Copyright 2018 NXP. */ +#include <linux/arm-smccc.h> #include <linux/firmware/imx/sci.h> #include <linux/module.h> #include <linux/of.h> @@ -12,6 +13,9 @@ #define IMX_SC_TIMER_FUNC_GET_RTC_SEC1970 9 #define IMX_SC_TIMER_FUNC_SET_RTC_TIME 6 +#define IMX_SIP_SRTC 0xC2000002 +#define IMX_SIP_SRTC_SET_TIME 0x0 + static struct imx_sc_ipc *rtc_ipc_handle; static struct rtc_device *imx_sc_rtc; @@ -42,8 +46,23 @@ static int imx_sc_rtc_read_time(struct device *dev, struct rtc_time *tm) return 0; } +static int imx_sc_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct arm_smccc_res res; + + /* pack 2 time parameters into 1 register, 16 bits for each */ + arm_smccc_smc(IMX_SIP_SRTC, IMX_SIP_SRTC_SET_TIME, + ((tm->tm_year + 1900) << 16) | (tm->tm_mon + 1), + (tm->tm_mday << 16) | tm->tm_hour, + (tm->tm_min << 16) | tm->tm_sec, + 0, 0, 0, &res); + + return res.a0; +} + static const struct rtc_class_ops imx_sc_rtc_ops = { .read_time = imx_sc_rtc_read_time, + .set_time = imx_sc_rtc_set_time, }; static int imx_sc_rtc_probe(struct platform_device *pdev) |