[PATCH net-next v4 07/12] net: ethernet: oa_tc6: enable open alliance tc6 data communication

Parthiban Veerasooran
2024-04-18T12:58:20Z

Enabling Configuration Synchronization bit (SYNC) in the Configuration
Register #0 enables data communication in the MAC-PHY. The state of this
bit is reflected in the data footer SYNC bit.

Signed-off-by: Parthiban Veerasooran <Parthiban.Veerasooran@microchip.com>
---
drivers/net/ethernet/oa_tc6.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)

diff --git a/drivers/net/ethernet/oa_tc6.c b/drivers/net/ethernet/oa_tc6.c
index f04c4c13e8d3..ef7069618319 100644
--- a/drivers/net/ethernet/oa_tc6.c
+++ b/drivers/net/ethernet/oa_tc6.c
@@ -20,6 +20,10 @@
#define OA_TC6_REG_RESET 0x0003
#define RESET_SWRESET BIT(0) /* Software Reset */

+/* Configuration Register #0 */
+#define OA_TC6_REG_CONFIG0 0x0004
+#define CONFIG0_SYNC BIT(15)
+
/* Status Register #0 */
#define OA_TC6_REG_STATUS0 0x0008
#define STATUS0_RESETC BIT(6) /* Reset Complete */
@@ -556,6 +560,21 @@ static int oa_tc6_unmask_macphy_error_interrupts(struct oa_tc6 *tc6)
return oa_tc6_write_register(tc6, OA_TC6_REG_INT_MASK0, regval);
}

+static int oa_tc6_enable_data_transfer(struct oa_tc6 *tc6)
+{
+ u32 value;
+ int ret;
+
+ ret = oa_tc6_read_register(tc6, OA_TC6_REG_CONFIG0, &value);
+ if (ret)
+ return ret;
+
+ /* Enable configuration synchronization for data transfer */
+ value |= CONFIG0_SYNC;
+
+ return oa_tc6_write_register(tc6, OA_TC6_REG_CONFIG0, value);
+}
+
/**
* oa_tc6_init - allocates and initializes oa_tc6 structure.
* @spi: device with which data will be exchanged.
@@ -613,7 +632,18 @@ struct oa_tc6 *oa_tc6_init(struct spi_device *spi, struct net_device *netdev)
return NULL;
}

+ ret = oa_tc6_enable_data_transfer(tc6);
+ if (ret) {
+ dev_err(&tc6->spi->dev, "Failed to enable data transfer: %d\n",
+ ret);
+ goto phy_exit;
+ }
+
return tc6;
+
+phy_exit:
+ oa_tc6_phy_exit(tc6);
+ return NULL;
}
EXPORT_SYMBOL_GPL(oa_tc6_init);

--
2.34.1