This patch adds a new API to provide access to the
hardware related data like soc revision, IDCODE... etc.
Signed-off-by: Nava kishore Manne <nava.manne@xxxxxxxxxx>
---
Changes for v2:
-New Patch.
drivers/firmware/xilinx/zynqmp.c | 24 ++++++++++++++++++++++++
include/linux/firmware/xlnx-zynqmp.h | 2 ++
2 files changed, 26 insertions(+)
diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 7ccedf0..7a33f93 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -447,8 +447,32 @@ static int zynqmp_pm_clock_getparent(u32 clock_id, u32 *parent_id)
return ret;
}
+/**
+ * zynqmp_pm_get_chipid - Get silicon ID registers
+ * @idcode: IDCODE register
+ * @version: version register
+ *
+ * Return: Returns the status of the operation and the idcode and version
+ * registers in @idcode and @version.
+ */
+static int zynqmp_pm_get_chipid(u32 *idcode, u32 *version)
+{
+ u32 ret_payload[PAYLOAD_ARG_CNT];
+ int ret;
+
+ if (!idcode || !version)
+ return -EINVAL;
+
+ ret = zynqmp_pm_invoke_fn(PM_GET_CHIPID, 0, 0, 0, 0, ret_payload);
+ *idcode = ret_payload[1];
+ *version = ret_payload[2];
+
+ return ret;
+}
+
static const struct zynqmp_eemi_ops eemi_ops = {
.get_api_version = zynqmp_pm_get_api_version,
+ .get_chipid = zynqmp_pm_get_chipid,
.ioctl = zynqmp_pm_ioctl,
.query_data = zynqmp_pm_query_data,
.clock_enable = zynqmp_pm_clock_enable,
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 58a7478..5a49d6f 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -34,6 +34,7 @@
enum pm_api_id {
PM_GET_API_VERSION = 1,
+ PM_GET_CHIPID = 22,
PM_IOCTL = 34,
PM_QUERY_DATA,
PM_CLOCK_ENABLE,
@@ -90,6 +91,7 @@ struct zynqmp_pm_query_data {
struct zynqmp_eemi_ops {
int (*get_api_version)(u32 *version);
+ int (*get_chipid)(u32 *idcode, u32 *version);
int (*ioctl)(u32 node_id, u32 ioctl_id, u32 arg1, u32 arg2, u32 *out);
int (*query_data)(struct zynqmp_pm_query_data qdata, u32 *out);
int (*clock_enable)(u32 clock_id);
--
2.7.4
