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authorYutang Jiang <yutang.jiang@nxp.com>2016-12-24 01:11:32 +0800
committerJo-Philipp Wich <jo@mein.io>2017-01-03 15:19:15 +0100
commit1866368a8ab8cacf73aa47f67138040d5620439d (patch)
tree2b0dd1ba578016957856f59bf4b2edc54d6a46c5 /target/linux/layerscape/patches-4.4/7216-dpaa2-evb-Fix-interrupt-handling.patch
parentc6d3a62919a7f993be625391d8593c84423aa021 (diff)
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layerscape: add ls1088ardb device support
LS1088A is an ARMv8 implementation combining eight ARM A53 processor cores. The LS1088ARDB is an evaluatoin platform that supports the LS1088A family SoCs. Features summary: - Eight 64-bit ARM v8 Cortex-A53 CPUs - Data path acceleration architecture 2.0 (DPAA2) - Ethernet interfaces - QUADSPI flash, 3 PCIe, 2 USB, 1 SD, 2 DUARTs etc Signed-off-by: Yutang Jiang <yutang.jiang@nxp.com>
Diffstat (limited to 'target/linux/layerscape/patches-4.4/7216-dpaa2-evb-Fix-interrupt-handling.patch')
-rw-r--r--target/linux/layerscape/patches-4.4/7216-dpaa2-evb-Fix-interrupt-handling.patch69
1 files changed, 69 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-4.4/7216-dpaa2-evb-Fix-interrupt-handling.patch b/target/linux/layerscape/patches-4.4/7216-dpaa2-evb-Fix-interrupt-handling.patch
new file mode 100644
index 0000000000..d3d976af98
--- /dev/null
+++ b/target/linux/layerscape/patches-4.4/7216-dpaa2-evb-Fix-interrupt-handling.patch
@@ -0,0 +1,69 @@
+From 4efb592d8a931669df5df04bedcae8cbc85c3700 Mon Sep 17 00:00:00 2001
+From: Razvan Stefanescu <razvan.stefanescu@freescale.com>
+Date: Wed, 17 Feb 2016 16:31:01 +0200
+Subject: [PATCH 216/226] dpaa2-evb: Fix interrupt handling
+
+Mask only the events handled by the driver - DPDMUX_IRQ_EVENT_LINK_CHANGED.
+
+Use clear-on-read mechanism for the interrupt status and avoid calling
+dpdmux_clear_irq_status(). Status contains the events handled (only link
+state change for the moment) and masks the first 16-bits, as they are used
+to store the interface ID that generated the event.
+
+Signed-off-by: Razvan Stefanescu <razvan.stefanescu@freescale.com>
+---
+ drivers/staging/fsl-dpaa2/evb/evb.c | 20 ++++++++++----------
+ 1 file changed, 10 insertions(+), 10 deletions(-)
+
+--- a/drivers/staging/fsl-dpaa2/evb/evb.c
++++ b/drivers/staging/fsl-dpaa2/evb/evb.c
+@@ -151,7 +151,9 @@ static irqreturn_t _evb_irq0_handler_thr
+ struct fsl_mc_io *io = priv->mc_io;
+ uint16_t token = priv->mux_handle;
+ int irq_index = DPDMUX_IRQ_INDEX_IF;
+- uint32_t status = 0, clear = 0;
++
++ /* Mask the events and the if_id reserved bits to be cleared on read */
++ uint32_t status = DPDMUX_IRQ_EVENT_LINK_CHANGED | 0xFFFF0000;
+ int err;
+
+ /* Sanity check */
+@@ -163,23 +165,21 @@ static irqreturn_t _evb_irq0_handler_thr
+ err = dpdmux_get_irq_status(io, 0, token, irq_index, &status);
+ if (unlikely(err)) {
+ netdev_err(netdev, "Can't get irq status (err %d)", err);
+- clear = 0xffffffff;
++ err = dpdmux_clear_irq_status(io, 0, token, irq_index,
++ 0xFFFFFFFF);
++ if (unlikely(err))
++ netdev_err(netdev, "Can't clear irq status (err %d)",
++ err);
+ goto out;
+ }
+
+- /* FIXME clear irq status */
+-
+ if (status & DPDMUX_IRQ_EVENT_LINK_CHANGED) {
+- clear |= DPDMUX_IRQ_EVENT_LINK_CHANGED;
+-
+ err = evb_links_state_update(priv);
+ if (unlikely(err))
+ goto out;
+ }
++
+ out:
+- err = dpdmux_clear_irq_status(io, 0, token, irq_index, clear);
+- if (unlikely(err))
+- netdev_err(netdev, "Can't clear irq status (err %d)", err);
+ return IRQ_HANDLED;
+ }
+
+@@ -191,7 +191,7 @@ static int evb_setup_irqs(struct fsl_mc_
+ int err = 0;
+ struct fsl_mc_device_irq *irq;
+ const int irq_index = DPDMUX_IRQ_INDEX_IF;
+- uint32_t mask = ~0x0u; /* FIXME: unmask handled irqs */
++ uint32_t mask = DPDMUX_IRQ_EVENT_LINK_CHANGED;
+
+ err = fsl_mc_allocate_irqs(evb_dev);
+ if (unlikely(err)) {