Revert "bcma: init serial console directly from ChipCommon code"

This reverts commit 4c81acab3816 ("bcma: init serial console directly
from ChipCommon code") as it broke IRQ assignment. Getting IRQ with
bcma_core_irq helper on SoC requires MIPS core to be set. It happens
*after* ChipCommon initialization so we can't do this so early.

This fixes a user reported regression. It wasn't critical as serial was
still somehow working but lack of IRQs was making in unreliable.

Fixes: 4c81acab3816 ("bcma: init serial console directly from ChipCommon code")
Reported-by: Felix Fietkau <nbd@nbd.name>
Cc: stable@vger.kernel.org # 4.6+
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/bcma/bcma_private.h b/drivers/bcma/bcma_private.h
index f642c42..168fa17 100644 (file)
--- a/drivers/bcma/bcma_private.h
+++ b/drivers/bcma/bcma_private.h
@@ -45,6 +45,9 @@ int bcma_sprom_get(struct bcma_bus *bus);
 void bcma_core_chipcommon_early_init(struct bcma_drv_cc *cc);
 void bcma_core_chipcommon_init(struct bcma_drv_cc *cc);
 void bcma_chipco_bcm4331_ext_pa_lines_ctl(struct bcma_drv_cc *cc, bool enable);
+#ifdef CONFIG_BCMA_DRIVER_MIPS
+void bcma_chipco_serial_init(struct bcma_drv_cc *cc);
+#endif /* CONFIG_BCMA_DRIVER_MIPS */
 
 /* driver_chipcommon_b.c */
 int bcma_core_chipcommon_b_init(struct bcma_drv_cc_b *ccb);

diff --git a/drivers/bcma/driver_chipcommon.c b/drivers/bcma/driver_chipcommon.c
index b4f6520..62f5bfa 100644 (file)
--- a/drivers/bcma/driver_chipcommon.c
+++ b/drivers/bcma/driver_chipcommon.c
@@ -15,8 +15,6 @@
 #include <linux/platform_device.h>
 #include <linux/bcma/bcma.h>
 
-static void bcma_chipco_serial_init(struct bcma_drv_cc *cc);
-
 static inline u32 bcma_cc_write32_masked(struct bcma_drv_cc *cc, u16 offset,
                                         u32 mask, u32 value)
 {
@@ -186,9 +184,6 @@ void bcma_core_chipcommon_early_init(struct bcma_drv_cc *cc)
        if (cc->capabilities & BCMA_CC_CAP_PMU)
                bcma_pmu_early_init(cc);
 
-       if (IS_BUILTIN(CONFIG_BCM47XX) && bus->hosttype == BCMA_HOSTTYPE_SOC)
-               bcma_chipco_serial_init(cc);
-
        if (bus->hosttype == BCMA_HOSTTYPE_SOC)
                bcma_core_chipcommon_flash_detect(cc);
 
@@ -378,9 +373,9 @@ u32 bcma_chipco_gpio_pulldown(struct bcma_drv_cc *cc, u32 mask, u32 value)
        return res;
 }
 
-static void bcma_chipco_serial_init(struct bcma_drv_cc *cc)
+#ifdef CONFIG_BCMA_DRIVER_MIPS
+void bcma_chipco_serial_init(struct bcma_drv_cc *cc)
 {
-#if IS_BUILTIN(CONFIG_BCM47XX)
        unsigned int irq;
        u32 baud_base;
        u32 i;
@@ -422,5 +417,5 @@ static void bcma_chipco_serial_init(struct bcma_drv_cc *cc)
                ports[i].baud_base = baud_base;
                ports[i].reg_shift = 0;
        }
-#endif /* CONFIG_BCM47XX */
 }
+#endif /* CONFIG_BCMA_DRIVER_MIPS */

diff --git a/drivers/bcma/driver_mips.c b/drivers/bcma/driver_mips.c
index 96f1713..89af807 100644 (file)
--- a/drivers/bcma/driver_mips.c
+++ b/drivers/bcma/driver_mips.c
@@ -278,9 +278,12 @@ static void bcma_core_mips_nvram_init(struct bcma_drv_mips *mcore)
 
 void bcma_core_mips_early_init(struct bcma_drv_mips *mcore)
 {
+       struct bcma_bus *bus = mcore->core->bus;
+
        if (mcore->early_setup_done)
                return;
 
+       bcma_chipco_serial_init(&bus->drv_cc);
        bcma_core_mips_nvram_init(mcore);
 
        mcore->early_setup_done = true;