ARM: shmobile: Koelsch: add Ether support

Register Ether platform device and pin data on  the  Koelsch board.
Register platform fixup for Micrel KSZ8041 PHY, just like on the Lager board.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

1 files changed, 55 insertions, 1 deletions

diff --git a/arch/arm/mach-shmobile/board-koelsch.c b/arch/arm/mach-shmobile/board-koelsch.c
index 5d84fb6f3c5c..de7cc64b1f37 100644
--- a/arch/arm/mach-shmobile/board-koelsch.c
+++ b/arch/arm/mach-shmobile/board-koelsch.c
@@ -25,10 +25,12 @@
 #include <linux/input.h>
 #include <linux/kernel.h>
 #include <linux/leds.h>
+#include <linux/phy.h>
 #include <linux/pinctrl/machine.h>
 #include <linux/platform_data/gpio-rcar.h>
 #include <linux/platform_data/rcar-du.h>
 #include <linux/platform_device.h>
+#include <linux/sh_eth.h>
 #include <mach/common.h>
 #include <mach/irqs.h>
 #include <mach/r8a7791.h>
@@ -87,6 +89,19 @@ static void __init koelsch_add_du_device(void)
         platform_device_register_full(&info);
 }
 
+/* Ether */
+static const struct sh_eth_plat_data ether_pdata __initconst = {
+        .phy                    = 0x1,
+        .edmac_endian           = EDMAC_LITTLE_ENDIAN,
+        .phy_interface          = PHY_INTERFACE_MODE_RMII,
+        .ether_link_active_low  = 1,
+};
+
+static const struct resource ether_resources[] __initconst = {
+        DEFINE_RES_MEM(0xee700000, 0x400),
+        DEFINE_RES_IRQ(gic_spi(162)),
+};
+
 /* LEDS */
 static struct gpio_led koelsch_leds[] = {
         {
@@ -141,6 +156,15 @@ static const struct pinctrl_map koelsch_pinctrl_map[] = {
                                   "du_sync", "du"),
         PIN_MAP_MUX_GROUP_DEFAULT("rcar-du-r8a7791", "pfc-r8a7791",
                                   "du_clk_out_0", "du"),
+        /* Ether */
+        PIN_MAP_MUX_GROUP_DEFAULT("r8a7791-ether", "pfc-r8a7791",
+                                  "eth_link", "eth"),
+        PIN_MAP_MUX_GROUP_DEFAULT("r8a7791-ether", "pfc-r8a7791",
+                                  "eth_mdio", "eth"),
+        PIN_MAP_MUX_GROUP_DEFAULT("r8a7791-ether", "pfc-r8a7791",
+                                  "eth_rmii", "eth"),
+        PIN_MAP_MUX_GROUP_DEFAULT("r8a7791-ether", "pfc-r8a7791",
+                                  "intc_irq0", "intc"),
         /* SCIF0 (CN19: DEBUG SERIAL0) */
         PIN_MAP_MUX_GROUP_DEFAULT("sh-sci.6", "pfc-r8a7791",
                                   "scif0_data_d", "scif0"),
@@ -156,6 +180,10 @@ static void __init koelsch_add_standard_devices(void)
                                   ARRAY_SIZE(koelsch_pinctrl_map));
         r8a7791_pinmux_init();
         r8a7791_add_standard_devices();
+        platform_device_register_resndata(&platform_bus, "r8a7791-ether", -1,
+                                          ether_resources,
+                                          ARRAY_SIZE(ether_resources),
+                                          &ether_pdata, sizeof(ether_pdata));
         platform_device_register_data(&platform_bus, "leds-gpio", -1,
                                       &koelsch_leds_pdata,
                                       sizeof(koelsch_leds_pdata));
@@ -166,6 +194,32 @@ static void __init koelsch_add_standard_devices(void)
         koelsch_add_du_device();
 }
 
+/*
+ * Ether LEDs on the Koelsch board are named LINK and ACTIVE which corresponds
+ * to non-default 01 setting of the Micrel KSZ8041 PHY control register 1 bits
+ * 14-15. We have to set them back to 01 from the default 00 value each time
+ * the PHY is reset. It's also important because the PHY's LED0 signal is
+ * connected to SoC's ETH_LINK signal and in the PHY's default mode it will
+ * bounce on and off after each packet, which we apparently want to avoid.
+ */
+static int koelsch_ksz8041_fixup(struct phy_device *phydev)
+{
+        u16 phyctrl1 = phy_read(phydev, 0x1e);
+
+        phyctrl1 &= ~0xc000;
+        phyctrl1 |= 0x4000;
+        return phy_write(phydev, 0x1e, phyctrl1);
+}
+
+static void __init koelsch_init(void)
+{
+        koelsch_add_standard_devices();
+
+        if (IS_ENABLED(CONFIG_PHYLIB))
+                phy_register_fixup_for_id("r8a7791-ether-ff:01",
+                                          koelsch_ksz8041_fixup);
+}
+
 static const char * const koelsch_boards_compat_dt[] __initconst = {
         "renesas,koelsch",
         NULL,
@@ -175,7 +229,7 @@ DT_MACHINE_START(KOELSCH_DT, "koelsch")
         .smp            = smp_ops(r8a7791_smp_ops),
         .init_early     = r8a7791_init_early,
         .init_time      = rcar_gen2_timer_init,
-        .init_machine   = koelsch_add_standard_devices,
+        .init_machine   = koelsch_init,
         .init_late      = shmobile_init_late,
         .dt_compat      = koelsch_boards_compat_dt,
 MACHINE_END