From 4a70c4ab4fa49c07cbec519dfb9f9f90d2fec8d5 Mon Sep 17 00:00:00 2001 From: Vivien Didelot Date: Mon, 20 Jun 2016 13:14:07 -0400 Subject: [PATCH] net: dsa: mv88e6xxx: add SMI init helper Add an helper function to isolate SMI specific assignments and checks. This function will later help choosing the different SMI accesses based of the compatible info. Since the chip structure is already allocated in the legacy probe, use the mv88e6xxx_reg_read access routine instead of __mv88e6xxx_reg_read. Signed-off-by: Vivien Didelot Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6xxx.c | 26 +++++++++++++++++++++----- 1 file changed, 21 insertions(+), 5 deletions(-) diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c index 113092a64d6b..4e24ac556ae2 100644 --- a/drivers/net/dsa/mv88e6xxx.c +++ b/drivers/net/dsa/mv88e6xxx.c @@ -3616,6 +3616,19 @@ static struct mv88e6xxx_priv_state *mv88e6xxx_alloc_chip(struct device *dev) return ps; } +static int mv88e6xxx_smi_init(struct mv88e6xxx_priv_state *ps, + struct mii_bus *bus, int sw_addr) +{ + /* ADDR[0] pin is unavailable externally and considered zero */ + if (sw_addr & 0x1) + return -EINVAL; + + ps->bus = bus; + ps->sw_addr = sw_addr; + + return 0; +} + static const char *mv88e6xxx_drv_probe(struct device *dsa_dev, struct device *host_dev, int sw_addr, void **priv) @@ -3635,7 +3648,11 @@ static const char *mv88e6xxx_drv_probe(struct device *dsa_dev, if (!ps) return NULL; - id = __mv88e6xxx_reg_read(bus, sw_addr, REG_PORT(0), PORT_SWITCH_ID); + err = mv88e6xxx_smi_init(ps, bus, sw_addr); + if (err) + goto free; + + id = mv88e6xxx_reg_read(ps, REG_PORT(0), PORT_SWITCH_ID); if (id < 0) goto free; @@ -3648,8 +3665,6 @@ static const char *mv88e6xxx_drv_probe(struct device *dsa_dev, name = info->name; - ps->bus = bus; - ps->sw_addr = sw_addr; ps->info = info; err = mv88e6xxx_mdio_register(ps, NULL); @@ -3741,8 +3756,9 @@ static int mv88e6xxx_probe(struct mdio_device *mdiodev) if (!ps) return -ENOMEM; - ps->bus = mdiodev->bus; - ps->sw_addr = mdiodev->addr; + err = mv88e6xxx_smi_init(ps, mdiodev->bus, mdiodev->addr); + if (err) + return err; id = mv88e6xxx_reg_read(ps, REG_PORT(0), PORT_SWITCH_ID); if (id < 0) -- 2.20.1