From: Amit Sunil Dhamne <amit.sunil.dhamne@xilinx.com> To: ard.biesheuvel@linaro.org, mingo@kernel.org, gregkh@linuxfoundation.org, matt@codeblueprint.co.uk, sudeep.holla@arm.com, hkallweit1@gmail.com, keescook@chromium.org, dmitry.torokhov@gmail.com, michal.simek@xilinx.com, rajanv@xilinx.com, tejas.patel@xilinx.com, jollys@xilinx.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, rajan.vaja@xilinx.com, jolly.shah@xilinx.com, Amit Sunil Dhamne <amit.sunil.dhamne@xilinx.com> Subject: [PATCH 3/3] firmware: xilinx: Add sysfs to get last reset reason Date: Wed, 9 Sep 2020 17:20:04 -0700 [thread overview] Message-ID: <1599697204-32103-4-git-send-email-amit.sunil.dhamne@xilinx.com> (raw) In-Reply-To: <1599697204-32103-1-git-send-email-amit.sunil.dhamne@xilinx.com> From: Tejas Patel <tejas.patel@xilinx.com> Add sysfs to get last reset reason. Signed-off-by: Tejas Patel <tejas.patel@xilinx.com> Signed-off-by: Amit Sunil Dhamne <amit.sunil.dhamne@xilinx.com> --- .../ABI/stable/sysfs-driver-firmware-zynqmp | 13 ++++++++ drivers/firmware/xilinx/zynqmp.c | 37 ++++++++++++++++++++++ include/linux/firmware/xlnx-zynqmp.h | 11 +++++++ 3 files changed, 61 insertions(+) diff --git a/Documentation/ABI/stable/sysfs-driver-firmware-zynqmp b/Documentation/ABI/stable/sysfs-driver-firmware-zynqmp index 00fa04c..96a5760 100644 --- a/Documentation/ABI/stable/sysfs-driver-firmware-zynqmp +++ b/Documentation/ABI/stable/sysfs-driver-firmware-zynqmp @@ -101,3 +101,16 @@ Description: # echo 0 > /sys/devices/platform/firmware\:zynqmp-firmware/health_status Users: Xilinx + +What: /sys/devices/platform/firmware\:zynqmp-firmware/last_reset_reason +Date: June 2020 +KernelVersion: 5.9.0 +Contact: "Tejas Patel" <tejasp@xilinx.com> +Description: + This sysfs interface allows to get last reset reason. + + Usage: + Get last reset reason + # cat /sys/devices/platform/firmware\:zynqmp-firmware/last_reset_reason + +Users: Xilinx diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c index c5db34f..f590856 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -1266,6 +1266,42 @@ static DEVICE_ATTR_RW(pggs1); static DEVICE_ATTR_RW(pggs2); static DEVICE_ATTR_RW(pggs3); +static ssize_t last_reset_reason_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + int ret; + u32 ret_payload[PAYLOAD_ARG_CNT]; + + ret = zynqmp_pm_get_last_reset_reason(ret_payload); + if (-EINVAL == ret) + return sprintf(buf, "Feature not supported\n"); + else if (ret) + return ret; + + switch (ret_payload[1]) { + case PM_RESET_REASON_EXT_POR: + return sprintf(buf, "ext_por\n"); + case PM_RESET_REASON_SW_POR: + return sprintf(buf, "sw_por\n"); + case PM_RESET_REASON_SLR_POR: + return sprintf(buf, "sl_por\n"); + case PM_RESET_REASON_ERR_POR: + return sprintf(buf, "err_por\n"); + case PM_RESET_REASON_DAP_SRST: + return sprintf(buf, "dap_srst\n"); + case PM_RESET_REASON_ERR_SRST: + return sprintf(buf, "err_srst\n"); + case PM_RESET_REASON_SW_SRST: + return sprintf(buf, "sw_srst\n"); + case PM_RESET_REASON_SLR_SRST: + return sprintf(buf, "slr_srst\n"); + default: + return sprintf(buf, "unknown reset\n"); + } +} + +static DEVICE_ATTR_RO(last_reset_reason); + static struct attribute *zynqmp_firmware_attrs[] = { &dev_attr_ggs0.attr, &dev_attr_ggs1.attr, @@ -1277,6 +1313,7 @@ static struct attribute *zynqmp_firmware_attrs[] = { &dev_attr_pggs3.attr, &dev_attr_shutdown_scope.attr, &dev_attr_health_status.attr, + &dev_attr_last_reset_reason.attr, NULL, }; diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h index 90c8664..f7cb0a9 100644 --- a/include/linux/firmware/xlnx-zynqmp.h +++ b/include/linux/firmware/xlnx-zynqmp.h @@ -302,6 +302,17 @@ enum zynqmp_pm_shutdown_subtype { ZYNQMP_PM_SHUTDOWN_SUBTYPE_SYSTEM, }; +enum pm_reset_reason { + PM_RESET_REASON_EXT_POR = 0, + PM_RESET_REASON_SW_POR = 1, + PM_RESET_REASON_SLR_POR = 2, + PM_RESET_REASON_ERR_POR = 3, + PM_RESET_REASON_DAP_SRST = 7, + PM_RESET_REASON_ERR_SRST = 8, + PM_RESET_REASON_SW_SRST = 9, + PM_RESET_REASON_SLR_SRST = 10, +}; + /** * struct zynqmp_pm_query_data - PM query data * @qid: query ID -- 2.7.4 This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately.
WARNING: multiple messages have this Message-ID (diff)
From: Amit Sunil Dhamne <amit.sunil.dhamne@xilinx.com> To: ard.biesheuvel@linaro.org, mingo@kernel.org, gregkh@linuxfoundation.org, matt@codeblueprint.co.uk, sudeep.holla@arm.com, hkallweit1@gmail.com, keescook@chromium.org, dmitry.torokhov@gmail.com, michal.simek@xilinx.com, rajanv@xilinx.com, tejas.patel@xilinx.com, jollys@xilinx.com Cc: jolly.shah@xilinx.com, rajan.vaja@xilinx.com, Amit Sunil Dhamne <amit.sunil.dhamne@xilinx.com>, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 3/3] firmware: xilinx: Add sysfs to get last reset reason Date: Wed, 9 Sep 2020 17:20:04 -0700 [thread overview] Message-ID: <1599697204-32103-4-git-send-email-amit.sunil.dhamne@xilinx.com> (raw) In-Reply-To: <1599697204-32103-1-git-send-email-amit.sunil.dhamne@xilinx.com> From: Tejas Patel <tejas.patel@xilinx.com> Add sysfs to get last reset reason. Signed-off-by: Tejas Patel <tejas.patel@xilinx.com> Signed-off-by: Amit Sunil Dhamne <amit.sunil.dhamne@xilinx.com> --- .../ABI/stable/sysfs-driver-firmware-zynqmp | 13 ++++++++ drivers/firmware/xilinx/zynqmp.c | 37 ++++++++++++++++++++++ include/linux/firmware/xlnx-zynqmp.h | 11 +++++++ 3 files changed, 61 insertions(+) diff --git a/Documentation/ABI/stable/sysfs-driver-firmware-zynqmp b/Documentation/ABI/stable/sysfs-driver-firmware-zynqmp index 00fa04c..96a5760 100644 --- a/Documentation/ABI/stable/sysfs-driver-firmware-zynqmp +++ b/Documentation/ABI/stable/sysfs-driver-firmware-zynqmp @@ -101,3 +101,16 @@ Description: # echo 0 > /sys/devices/platform/firmware\:zynqmp-firmware/health_status Users: Xilinx + +What: /sys/devices/platform/firmware\:zynqmp-firmware/last_reset_reason +Date: June 2020 +KernelVersion: 5.9.0 +Contact: "Tejas Patel" <tejasp@xilinx.com> +Description: + This sysfs interface allows to get last reset reason. + + Usage: + Get last reset reason + # cat /sys/devices/platform/firmware\:zynqmp-firmware/last_reset_reason + +Users: Xilinx diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c index c5db34f..f590856 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -1266,6 +1266,42 @@ static DEVICE_ATTR_RW(pggs1); static DEVICE_ATTR_RW(pggs2); static DEVICE_ATTR_RW(pggs3); +static ssize_t last_reset_reason_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + int ret; + u32 ret_payload[PAYLOAD_ARG_CNT]; + + ret = zynqmp_pm_get_last_reset_reason(ret_payload); + if (-EINVAL == ret) + return sprintf(buf, "Feature not supported\n"); + else if (ret) + return ret; + + switch (ret_payload[1]) { + case PM_RESET_REASON_EXT_POR: + return sprintf(buf, "ext_por\n"); + case PM_RESET_REASON_SW_POR: + return sprintf(buf, "sw_por\n"); + case PM_RESET_REASON_SLR_POR: + return sprintf(buf, "sl_por\n"); + case PM_RESET_REASON_ERR_POR: + return sprintf(buf, "err_por\n"); + case PM_RESET_REASON_DAP_SRST: + return sprintf(buf, "dap_srst\n"); + case PM_RESET_REASON_ERR_SRST: + return sprintf(buf, "err_srst\n"); + case PM_RESET_REASON_SW_SRST: + return sprintf(buf, "sw_srst\n"); + case PM_RESET_REASON_SLR_SRST: + return sprintf(buf, "slr_srst\n"); + default: + return sprintf(buf, "unknown reset\n"); + } +} + +static DEVICE_ATTR_RO(last_reset_reason); + static struct attribute *zynqmp_firmware_attrs[] = { &dev_attr_ggs0.attr, &dev_attr_ggs1.attr, @@ -1277,6 +1313,7 @@ static struct attribute *zynqmp_firmware_attrs[] = { &dev_attr_pggs3.attr, &dev_attr_shutdown_scope.attr, &dev_attr_health_status.attr, + &dev_attr_last_reset_reason.attr, NULL, }; diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h index 90c8664..f7cb0a9 100644 --- a/include/linux/firmware/xlnx-zynqmp.h +++ b/include/linux/firmware/xlnx-zynqmp.h @@ -302,6 +302,17 @@ enum zynqmp_pm_shutdown_subtype { ZYNQMP_PM_SHUTDOWN_SUBTYPE_SYSTEM, }; +enum pm_reset_reason { + PM_RESET_REASON_EXT_POR = 0, + PM_RESET_REASON_SW_POR = 1, + PM_RESET_REASON_SLR_POR = 2, + PM_RESET_REASON_ERR_POR = 3, + PM_RESET_REASON_DAP_SRST = 7, + PM_RESET_REASON_ERR_SRST = 8, + PM_RESET_REASON_SW_SRST = 9, + PM_RESET_REASON_SLR_SRST = 10, +}; + /** * struct zynqmp_pm_query_data - PM query data * @qid: query ID -- 2.7.4 This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-09-10 2:47 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-09-10 0:20 [PATCH 0/3] firmware: xilinx: Add support to get last reset reason Amit Sunil Dhamne 2020-09-10 0:20 ` Amit Sunil Dhamne 2020-09-10 0:20 ` [PATCH 1/3] firmware: xilinx: Add validation check for IOCTL Amit Sunil Dhamne 2020-09-10 0:20 ` Amit Sunil Dhamne 2020-09-16 11:33 ` Greg KH 2020-09-16 11:33 ` Greg KH 2020-09-16 16:53 ` Amit Sunil Dhamne 2020-09-16 16:53 ` Amit Sunil Dhamne 2020-09-17 6:45 ` Punit Agrawal 2020-09-17 6:45 ` Punit Agrawal 2020-09-10 0:20 ` [PATCH 2/3] firmware: xilinx: Add support for GET_LAST_RESET_REASON IOCTL Amit Sunil Dhamne 2020-09-10 0:20 ` Amit Sunil Dhamne 2020-09-10 0:20 ` Amit Sunil Dhamne [this message] 2020-09-10 0:20 ` [PATCH 3/3] firmware: xilinx: Add sysfs to get last reset reason Amit Sunil Dhamne
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