From: "Jan Petrous (OSS)" <jan.petrous@xxxxxxxxxxx>
The PTP clock is read by stmmac_platform during DT parse.
On S32G/R the clock is not ready and returns 0. Postpone
reading of the clock on PTP init.
Co-developed-by: Andrei Botila <andrei.botila@xxxxxxx>
Signed-off-by: Andrei Botila <andrei.botila@xxxxxxx>
Signed-off-by: Jan Petrous (OSS) <jan.petrous@xxxxxxxxxxx>
Reviewed-by: Jacob Keller <jacob.e.keller@xxxxxxxxx>
---
drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c
index fba221c37594..da2cdcfd0529 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c
@@ -140,6 +140,18 @@ static void s32_fix_mac_speed(void *priv, unsigned int speed, unsigned int mode)
dev_err(gmac->dev, "Can't set tx clock\n");
}
+static void s32_dwmac_ptp_clk_freq_config(struct stmmac_priv *priv)
+{
+ struct plat_stmmacenet_data *plat = priv->plat;
+
+ if (!plat->clk_ptp_ref)
+ return;
+
+ plat->clk_ptp_rate = clk_get_rate(plat->clk_ptp_ref);
+
+ netdev_dbg(priv->dev, "PTP rate %lu\n", plat->clk_ptp_rate);
+}
+
static int s32_dwmac_probe(struct platform_device *pdev)
{
struct plat_stmmacenet_data *plat;
@@ -195,6 +207,7 @@ static int s32_dwmac_probe(struct platform_device *pdev)
plat->init = s32_gmac_init;
plat->exit = s32_gmac_exit;
plat->fix_mac_speed = s32_fix_mac_speed;
+ plat->ptp_clk_freq_config = s32_dwmac_ptp_clk_freq_config;
plat->bsp_priv = gmac;
--
2.46.0
