net: ti: icssg-prueth: Enable PTP timestamping support for SR1.0 devices

Enable PTP support for AM65x SR1.0 devices by registering with the IEP
infrastructure in order to expose a PTP clock to userspace.

Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Signed-off-by: Diogo Ivo <diogo.ivo@siemens.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c b/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c
index 7b3304b..fa98bdb 100644 (file)
--- a/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c
+++ b/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c
@@ -1011,16 +1011,44 @@ static int prueth_probe(struct platform_device *pdev)
        dev_dbg(dev, "sram: pa %llx va %p size %zx\n", prueth->msmcram.pa,
                prueth->msmcram.va, prueth->msmcram.size);
 
+       prueth->iep0 = icss_iep_get_idx(np, 0);
+       if (IS_ERR(prueth->iep0)) {
+               ret = dev_err_probe(dev, PTR_ERR(prueth->iep0),
+                                   "iep0 get failed\n");
+               goto free_pool;
+       }
+
+       prueth->iep1 = icss_iep_get_idx(np, 1);
+       if (IS_ERR(prueth->iep1)) {
+               ret = dev_err_probe(dev, PTR_ERR(prueth->iep1),
+                                   "iep1 get failed\n");
+               goto put_iep0;
+       }
+
+       ret = icss_iep_init(prueth->iep0, NULL, NULL, 0);
+       if (ret) {
+               dev_err_probe(dev, ret, "failed to init iep0\n");
+               goto put_iep;
+       }
+
+       ret = icss_iep_init(prueth->iep1, NULL, NULL, 0);
+       if (ret) {
+               dev_err_probe(dev, ret, "failed to init iep1\n");
+               goto exit_iep0;
+       }
+
        if (eth0_node) {
                ret = prueth_netdev_init(prueth, eth0_node);
                if (ret) {
                        dev_err_probe(dev, ret, "netdev init %s failed\n",
                                      eth0_node->name);
-                       goto free_pool;
+                       goto exit_iep;
                }
 
                if (of_find_property(eth0_node, "ti,half-duplex-capable", NULL))
                        prueth->emac[PRUETH_MAC0]->half_duplex = 1;
+
+               prueth->emac[PRUETH_MAC0]->iep = prueth->iep0;
        }
 
        if (eth1_node) {
@@ -1033,6 +1061,8 @@ static int prueth_probe(struct platform_device *pdev)
 
                if (of_find_property(eth1_node, "ti,half-duplex-capable", NULL))
                        prueth->emac[PRUETH_MAC1]->half_duplex = 1;
+
+               prueth->emac[PRUETH_MAC1]->iep = prueth->iep1;
        }
 
        /* register the network devices */
@@ -1091,6 +1121,19 @@ netdev_exit:
                prueth_netdev_exit(prueth, eth_node);
        }
 
+exit_iep:
+       icss_iep_exit(prueth->iep1);
+exit_iep0:
+       icss_iep_exit(prueth->iep0);
+
+put_iep:
+       icss_iep_put(prueth->iep1);
+
+put_iep0:
+       icss_iep_put(prueth->iep0);
+       prueth->iep0 = NULL;
+       prueth->iep1 = NULL;
+
 free_pool:
        gen_pool_free(prueth->sram_pool,
                      (unsigned long)prueth->msmcram.va, msmc_ram_size);
@@ -1138,6 +1181,12 @@ static void prueth_remove(struct platform_device *pdev)
                prueth_netdev_exit(prueth, eth_node);
        }
 
+       icss_iep_exit(prueth->iep1);
+       icss_iep_exit(prueth->iep0);
+
+       icss_iep_put(prueth->iep1);
+       icss_iep_put(prueth->iep0);
+
        gen_pool_free(prueth->sram_pool,
                      (unsigned long)prueth->msmcram.va,
                      MSMC_RAM_SIZE_SR1);