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[net-next,4/4] octeontx2-af: Initialize PTP_SEC_ROLLOVER register properly

Message ID 20220910075416.22887-5-naveenm@marvell.com (mailing list archive)
State Accepted
Commit 85a5f9638313a1df7e84e9ea66ecd216133215c2
Delegated to: Netdev Maintainers
Headers show
Series Add PTP support for CN10K silicon | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 4 maintainers not CCed: gakula@marvell.com jerinj@marvell.com sbhatta@marvell.com lcherian@marvell.com
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch warning WARNING: line length of 93 exceeds 80 columns
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Naveen Mamindlapalli Sept. 10, 2022, 7:54 a.m. UTC 
Since the reset value of PTP_SEC_ROLLOVER is incorrect on
CNF10KB silicon, the ptp timestamps are inaccurate. This
patch initializes the PTP_SEC_ROLLOVER register properly
for the CNF10KB silicon.

Signed-off-by: Naveen Mamindlapalli <naveenm@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
---
 drivers/net/ethernet/marvell/octeontx2/af/ptp.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/ptp.c b/drivers/net/ethernet/marvell/octeontx2/af/ptp.c
index 01f7dbad6b92..3411e2e47d46 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/ptp.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/ptp.c
@@ -52,12 +52,18 @@ 
 #define PTP_CLOCK_COMP				0xF18ULL
 #define PTP_TIMESTAMP				0xF20ULL
 #define PTP_CLOCK_SEC				0xFD0ULL
+#define PTP_SEC_ROLLOVER			0xFD8ULL
 
 #define CYCLE_MULT				1000
 
 static struct ptp *first_ptp_block;
 static const struct pci_device_id ptp_id_table[];
 
+static bool is_ptp_dev_cnf10kb(struct ptp *ptp)
+{
+	return (ptp->pdev->subsystem_device == PCI_SUBSYS_DEVID_CNF10K_B_PTP) ? true : false;
+}
+
 static bool is_ptp_dev_cn10k(struct ptp *ptp)
 {
 	return (ptp->pdev->device == PCI_DEVID_CN10K_PTP) ? true : false;
@@ -290,6 +296,10 @@  void ptp_start(struct ptp *ptp, u64 sclk, u32 ext_clk_freq, u32 extts)
 	/* sclk is in MHz */
 	ptp->clock_rate = sclk * 1000000;
 
+	/* Program the seconds rollover value to 1 second */
+	if (is_ptp_dev_cnf10kb(ptp))
+		writeq(0x3b9aca00, ptp->reg_base + PTP_SEC_ROLLOVER);
+
 	/* Enable PTP clock */
 	clock_cfg = readq(ptp->reg_base + PTP_CLOCK_CFG);