firmware: xilinx: Add zynqmp IOCTL API for device control

Add ZynqMP firmware IOCTL API to control and configure
devices like PLLs, SD, Gem, etc.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Jolly Shah <jollys@xilinx.com>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

2 files changed, 45 insertions, 1 deletions

diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 84b3fd2eca8b..9a1c72a9280f 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -428,6 +428,47 @@ static int zynqmp_pm_clock_getparent(u32 clock_id, u32 *parent_id)
         return ret;
 }
 
+/**
+ * zynqmp_is_valid_ioctl() - Check whether IOCTL ID is valid or not
+ * @ioctl_id:   IOCTL ID
+ *
+ * Return: 1 if IOCTL is valid else 0
+ */
+static inline int zynqmp_is_valid_ioctl(u32 ioctl_id)
+{
+        switch (ioctl_id) {
+        case IOCTL_SET_PLL_FRAC_MODE:
+        case IOCTL_GET_PLL_FRAC_MODE:
+        case IOCTL_SET_PLL_FRAC_DATA:
+        case IOCTL_GET_PLL_FRAC_DATA:
+                return 1;
+        default:
+                return 0;
+        }
+}
+
+/**
+ * zynqmp_pm_ioctl() - PM IOCTL API for device control and configs
+ * @node_id:    Node ID of the device
+ * @ioctl_id:   ID of the requested IOCTL
+ * @arg1:       Argument 1 to requested IOCTL call
+ * @arg2:       Argument 2 to requested IOCTL call
+ * @out:        Returned output value
+ *
+ * This function calls IOCTL to firmware for device control and configuration.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_ioctl(u32 node_id, u32 ioctl_id, u32 arg1, u32 arg2,
+                           u32 *out)
+{
+        if (!zynqmp_is_valid_ioctl(ioctl_id))
+                return -EINVAL;
+
+        return zynqmp_pm_invoke_fn(PM_IOCTL, node_id, ioctl_id,
+                                   arg1, arg2, out);
+}
+
 static const struct zynqmp_eemi_ops eemi_ops = {
         .get_api_version = zynqmp_pm_get_api_version,
         .query_data = zynqmp_pm_query_data,
@@ -440,6 +481,7 @@ static const struct zynqmp_eemi_ops eemi_ops = {
         .clock_getrate = zynqmp_pm_clock_getrate,
         .clock_setparent = zynqmp_pm_clock_setparent,
         .clock_getparent = zynqmp_pm_clock_getparent,
+        .ioctl = zynqmp_pm_ioctl,
 };
 
 /**
diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h
index 015e130431e6..7a9db0861803 100644
--- a/include/linux/firmware/xlnx-zynqmp.h
+++ b/include/linux/firmware/xlnx-zynqmp.h
@@ -34,7 +34,8 @@
 
 enum pm_api_id {
         PM_GET_API_VERSION = 1,
-        PM_QUERY_DATA = 35,
+        PM_IOCTL = 34,
+        PM_QUERY_DATA,
         PM_CLOCK_ENABLE,
         PM_CLOCK_DISABLE,
         PM_CLOCK_GETSTATE,
@@ -99,6 +100,7 @@ struct zynqmp_eemi_ops {
         int (*clock_getrate)(u32 clock_id, u64 *rate);
         int (*clock_setparent)(u32 clock_id, u32 parent_id);
         int (*clock_getparent)(u32 clock_id, u32 *parent_id);
+        int (*ioctl)(u32 node_id, u32 ioctl_id, u32 arg1, u32 arg2, u32 *out);
 };
 
 #if IS_REACHABLE(CONFIG_ARCH_ZYNQMP)