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Message-Id: <20240529-iep-v1-1-7273c07592d3@siemens.com>
Date: Wed, 29 May 2024 17:05:10 +0100
From: Diogo Ivo <diogo.ivo@...mens.com>
To: MD Danish Anwar <danishanwar@...com>, Roger Quadros <rogerq@...nel.org>,
"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Richard Cochran <richardcochran@...il.com>, Nishanth Menon <nm@...com>,
Vignesh Raghavendra <vigneshr@...com>, Tero Kristo <kristo@...nel.org>,
Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>, Jan Kiszka <jan.kiszka@...mens.com>
Cc: linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
Diogo Ivo <diogo.ivo@...mens.com>
Subject: [PATCH 1/3] 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.
Signed-off-by: Diogo Ivo <diogo.ivo@...mens.com>
---
drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c | 49 +++++++++++++++++++++++-
1 file changed, 48 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c b/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c
index 7b3304bbd7fc..01cad01965dc 100644
--- a/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c
+++ b/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c
@@ -1011,16 +1011,42 @@ 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 +1059,8 @@ 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 +1119,19 @@ static int prueth_probe(struct platform_device *pdev)
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 +1179,12 @@ 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);
--
2.45.1
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