diff options
| -rw-r--r-- | drivers/rtc/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/rtc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/rtc/rtc-imx-sc.c | 91 |
3 files changed, 99 insertions, 0 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index a819ef07b7ec..225b0b8516f3 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -1677,6 +1677,13 @@ config RTC_DRV_SNVS This driver can also be built as a module, if so, the module will be called "rtc-snvs". +config RTC_DRV_IMX_SC + depends on IMX_SCU + tristate "NXP i.MX System Controller RTC support" + help + If you say yes here you get support for the NXP i.MX System + Controller RTC module. + config RTC_DRV_SIRFSOC tristate "SiRFSOC RTC" depends on ARCH_SIRF diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile index 290c1730fb0a..f97c05ef99db 100644 --- a/drivers/rtc/Makefile +++ b/drivers/rtc/Makefile @@ -75,6 +75,7 @@ obj-$(CONFIG_RTC_DRV_GOLDFISH) += rtc-goldfish.o obj-$(CONFIG_RTC_DRV_HID_SENSOR_TIME) += rtc-hid-sensor-time.o obj-$(CONFIG_RTC_DRV_HYM8563) += rtc-hym8563.o obj-$(CONFIG_RTC_DRV_IMXDI) += rtc-imxdi.o +obj-$(CONFIG_RTC_DRV_IMX_SC) += rtc-imx-sc.o obj-$(CONFIG_RTC_DRV_ISL12022) += rtc-isl12022.o obj-$(CONFIG_RTC_DRV_ISL12026) += rtc-isl12026.o obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o diff --git a/drivers/rtc/rtc-imx-sc.c b/drivers/rtc/rtc-imx-sc.c new file mode 100644 index 000000000000..7ff08544532a --- /dev/null +++ b/drivers/rtc/rtc-imx-sc.c @@ -0,0 +1,91 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2018 NXP. + */ + +#include <linux/firmware/imx/sci.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/rtc.h> + +#define IMX_SC_TIMER_FUNC_GET_RTC_SEC1970 9 +#define IMX_SC_TIMER_FUNC_SET_RTC_TIME 6 + +static struct imx_sc_ipc *rtc_ipc_handle; +static struct rtc_device *imx_sc_rtc; + +struct imx_sc_msg_timer_get_rtc_time { + struct imx_sc_rpc_msg hdr; + u32 time; +} __packed; + +static int imx_sc_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct imx_sc_msg_timer_get_rtc_time msg; + struct imx_sc_rpc_msg *hdr = &msg.hdr; + int ret; + + hdr->ver = IMX_SC_RPC_VERSION; + hdr->svc = IMX_SC_RPC_SVC_TIMER; + hdr->func = IMX_SC_TIMER_FUNC_GET_RTC_SEC1970; + hdr->size = 1; + + ret = imx_scu_call_rpc(rtc_ipc_handle, &msg, true); + if (ret) { + dev_err(dev, "read rtc time failed, ret %d\n", ret); + return ret; + } + + rtc_time_to_tm(msg.time, tm); + + return 0; +} + +static const struct rtc_class_ops imx_sc_rtc_ops = { + .read_time = imx_sc_rtc_read_time, +}; + +static int imx_sc_rtc_probe(struct platform_device *pdev) +{ + int ret; + + ret = imx_scu_get_handle(&rtc_ipc_handle); + if (ret) + return ret; + + imx_sc_rtc = devm_rtc_allocate_device(&pdev->dev); + if (IS_ERR(imx_sc_rtc)) + return PTR_ERR(imx_sc_rtc); + + imx_sc_rtc->ops = &imx_sc_rtc_ops; + imx_sc_rtc->range_min = 0; + imx_sc_rtc->range_max = U32_MAX; + + ret = rtc_register_device(imx_sc_rtc); + if (ret) { + dev_err(&pdev->dev, "failed to register rtc: %d\n", ret); + return ret; + } + + return 0; +} + +static const struct of_device_id imx_sc_dt_ids[] = { + { .compatible = "fsl,imx8qxp-sc-rtc", }, + {} +}; +MODULE_DEVICE_TABLE(of, imx_sc_dt_ids); + +static struct platform_driver imx_sc_rtc_driver = { + .driver = { + .name = "imx-sc-rtc", + .of_match_table = imx_sc_dt_ids, + }, + .probe = imx_sc_rtc_probe, +}; +module_platform_driver(imx_sc_rtc_driver); + +MODULE_AUTHOR("Anson Huang <Anson.Huang@nxp.com>"); +MODULE_DESCRIPTION("NXP i.MX System Controller RTC Driver"); +MODULE_LICENSE("GPL"); |