[PATCH net-next 3/4] net: dsa: sja1105: Export the sja1105_inhibit_tx function

[Vladimir Oltean]

This will be used to stop egress traffic in .phylink_mac_link_up.

Signed-off-by: Vladimir Oltean <olte...@gmail.com>
---
 drivers/net/dsa/sja1105/sja1105.h     |  2 ++
 drivers/net/dsa/sja1105/sja1105_spi.c | 14 ++++++++------
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/net/dsa/sja1105/sja1105.h 
b/drivers/net/dsa/sja1105/sja1105.h
index 38b6c7c7db86..ed66d00eb394 100644
--- a/drivers/net/dsa/sja1105/sja1105.h
+++ b/drivers/net/dsa/sja1105/sja1105.h
@@ -138,6 +138,8 @@ int sja1105_spi_send_long_packed_buf(const struct 
sja1105_private *priv,
                                     sja1105_spi_rw_mode_t rw, u64 base_addr,
                                     void *packed_buf, u64 buf_len);
 int sja1105_static_config_upload(struct sja1105_private *priv);
+int sja1105_inhibit_tx(const struct sja1105_private *priv,
+                      unsigned long port_bitmap, bool tx_inhibited);
 
 extern struct sja1105_info sja1105e_info;
 extern struct sja1105_info sja1105t_info;
diff --git a/drivers/net/dsa/sja1105/sja1105_spi.c 
b/drivers/net/dsa/sja1105/sja1105_spi.c
index d729a0f0b28e..d7ff74259b31 100644
--- a/drivers/net/dsa/sja1105/sja1105_spi.c
+++ b/drivers/net/dsa/sja1105/sja1105_spi.c
@@ -285,20 +285,22 @@ static int sja1105_cold_reset(const struct 
sja1105_private *priv)
        return priv->info->reset_cmd(priv, &reset);
 }
 
-static int sja1105_inhibit_tx(const struct sja1105_private *priv,
-                             const unsigned long *port_bitmap)
+int sja1105_inhibit_tx(const struct sja1105_private *priv,
+                      unsigned long port_bitmap, bool tx_inhibited)
 {
        const struct sja1105_regs *regs = priv->info->regs;
        u64 inhibit_cmd;
-       int port, rc;
+       int rc;
 
        rc = sja1105_spi_send_int(priv, SPI_READ, regs->port_control,
                                  &inhibit_cmd, SJA1105_SIZE_PORT_CTRL);
        if (rc < 0)
                return rc;
 
-       for_each_set_bit(port, port_bitmap, SJA1105_NUM_PORTS)
-               inhibit_cmd |= BIT(port);
+       if (tx_inhibited)
+               inhibit_cmd |= port_bitmap;
+       else
+               inhibit_cmd &= ~port_bitmap;
 
        return sja1105_spi_send_int(priv, SPI_WRITE, regs->port_control,
                                    &inhibit_cmd, SJA1105_SIZE_PORT_CTRL);
@@ -415,7 +417,7 @@ int sja1105_static_config_upload(struct sja1105_private 
*priv)
         * Tx on all ports and waiting for current packet to drain.
         * Otherwise, the PHY will see an unterminated Ethernet packet.
         */
-       rc = sja1105_inhibit_tx(priv, &port_bitmap);
+       rc = sja1105_inhibit_tx(priv, port_bitmap, true);
        if (rc < 0) {
                dev_err(dev, "Failed to inhibit Tx on ports\n");
                return -ENXIO;
-- 
2.17.1