[PATCH net-next 4/5] net: gemini: Move main init to port

[Linus Walleij]

The initialization sequence for the ethernet, setting up
interrupt routing and such things, need to be done after
both the ports are clocked and reset. Before this the
config will not "take". Move the initialization to the
port probe function and keep track of init status in
the state.

Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
---
 drivers/net/ethernet/cortina/gemini.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/cortina/gemini.c 
b/drivers/net/ethernet/cortina/gemini.c
index 8d192fcd51c8..79324bbfd768 100644
--- a/drivers/net/ethernet/cortina/gemini.c
+++ b/drivers/net/ethernet/cortina/gemini.c
@@ -146,6 +146,7 @@ struct gemini_ethernet {
        void __iomem *base;
        struct gemini_ethernet_port *port0;
        struct gemini_ethernet_port *port1;
+       bool initialized;
 
        spinlock_t      irq_lock; /* Locks IRQ-related registers */
        unsigned int    freeq_order;
@@ -2301,6 +2302,14 @@ static void gemini_port_remove(struct 
gemini_ethernet_port *port)
 
 static void gemini_ethernet_init(struct gemini_ethernet *geth)
 {
+       /* Only do this once both ports are online */
+       if (geth->initialized)
+               return;
+       if (geth->port0 && geth->port1)
+               geth->initialized = true;
+       else
+               return;
+
        writel(0, geth->base + GLOBAL_INTERRUPT_ENABLE_0_REG);
        writel(0, geth->base + GLOBAL_INTERRUPT_ENABLE_1_REG);
        writel(0, geth->base + GLOBAL_INTERRUPT_ENABLE_2_REG);
@@ -2447,6 +2456,10 @@ static int gemini_ethernet_port_probe(struct 
platform_device *pdev)
                geth->port0 = port;
        else
                geth->port1 = port;
+
+       /* This will just be done once both ports are up and reset */
+       gemini_ethernet_init(geth);
+
        platform_set_drvdata(pdev, port);
 
        /* Set up and register the netdev */
@@ -2564,7 +2577,6 @@ static int gemini_ethernet_probe(struct platform_device 
*pdev)
 
        spin_lock_init(&geth->irq_lock);
        spin_lock_init(&geth->freeq_lock);
-       gemini_ethernet_init(geth);
 
        /* The children will use this */
        platform_set_drvdata(pdev, geth);
@@ -2577,8 +2589,8 @@ static int gemini_ethernet_remove(struct platform_device 
*pdev)
 {
        struct gemini_ethernet *geth = platform_get_drvdata(pdev);
 
-       gemini_ethernet_init(geth);
        geth_cleanup_freeq(geth);
+       geth->initialized = false;
 
        return 0;
 }
-- 
2.17.1