net: zynq_gem: Add SGMII dynamic config support

Add support for SGMII dynamic configuration which will takes care of
configuring SGMII in the GEM secure (GEM_CLK_CTRL) configuration
register.

Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/a8915186e44015959978d080a31de652f544cd4a.1648631275.git.michal.simek@xilinx.com

diff --git a/drivers/net/zynq_gem.c b/drivers/net/zynq_gem.c
index 07de1bf..4c83ccc 100644 (file)
--- a/drivers/net/zynq_gem.c
+++ b/drivers/net/zynq_gem.c
@@ -34,6 +34,7 @@
 #include <linux/err.h>
 #include <linux/errno.h>
 #include <eth_phy.h>
+#include <zynqmp_firmware.h>
 
 /* Bit/mask specification */
 #define ZYNQ_GEM_PHYMNTNC_OP_MASK      0x40020000 /* operation mask bits */
@@ -714,6 +715,40 @@ static int zynq_gem_reset_init(struct udevice *dev)
        return 0;
 }
 
+static int gem_zynqmp_set_dynamic_config(struct udevice *dev)
+{
+       u32 pm_info[2];
+       int ret;
+
+       if (IS_ENABLED(CONFIG_ARCH_ZYNQMP)) {
+               if (!zynqmp_pm_is_function_supported(PM_IOCTL,
+                                                    IOCTL_SET_GEM_CONFIG)) {
+                       ret = ofnode_read_u32_array(dev_ofnode(dev),
+                                                   "power-domains",
+                                                   pm_info,
+                                                   ARRAY_SIZE(pm_info));
+                       if (ret) {
+                               dev_err(dev,
+                                       "Failed to read power-domains info\n");
+                               return ret;
+                       }
+
+                       ret = zynqmp_pm_set_gem_config(pm_info[1],
+                                                      GEM_CONFIG_FIXED, 0);
+                       if (ret)
+                               return ret;
+
+                       ret = zynqmp_pm_set_gem_config(pm_info[1],
+                                                      GEM_CONFIG_SGMII_MODE,
+                                                      1);
+                       if (ret)
+                               return ret;
+               }
+       }
+
+       return 0;
+}
+
 static int zynq_gem_probe(struct udevice *dev)
 {
        void *bd_space;
@@ -797,6 +832,17 @@ static int zynq_gem_probe(struct udevice *dev)
                goto err3;
 
        if (priv->interface == PHY_INTERFACE_MODE_SGMII && phy.dev) {
+               if (IS_ENABLED(CONFIG_DM_ETH_PHY)) {
+                       if (device_is_compatible(dev, "cdns,zynqmp-gem")) {
+                               ret = gem_zynqmp_set_dynamic_config(dev);
+                               if (ret) {
+                                       dev_err
+                                       (dev,
+                                        "Failed to set gem dynamic config\n");
+                                       return ret;
+                               }
+                       }
+               }
                ret = generic_phy_power_on(&phy);
                if (ret)
                        return ret;