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Extend the imx6 gpc->gic interrupt controller fixup of fdt data at runtime

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to work with the pmu and tempmon nodes as well as the soc node.  This allows
interrupts to work on the pmu and tempmon devices even though we don't have
a driver for the low-power gpc interrupt controller (which is not a problem
because we also don't have support for entering deep power-down modes where
it gets used).
This commit is contained in:
Ian Lepore 2020-11-25 20:05:05 +00:00
parent 0ffeeb414f
commit 2814e68675
1 changed files with 25 additions and 11 deletions
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36
sys/arm/freescale/imx/imx6_machdep.c
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@ -78,6 +78,10 @@ static platform_cpu_reset_t imx6_cpu_reset;
* node to refer to GIC instead of GPC. This will get us by until we write our
* own GPC driver (or until linux changes its mind and the FDT data again).
*
* 2020/11/25: The tempmon and pmu nodes are siblings (not children) of the soc
* node, so for them to use interrupts we need to apply the same fix as we do
* for the soc node.
*
* We validate that we have data that looks like we expect before changing it:
* - SOC node exists and has GPC as its interrupt parent.
* - GPC node exists and has GIC as its interrupt parent.
@ -95,22 +99,30 @@ static platform_cpu_reset_t imx6_cpu_reset;
* nodes by string matching we now have to search for both flavors of each node
* name involved.
*/
static void
fix_node_iparent(const char* nodepath, phandle_t gpcxref, phandle_t gicxref)
{
static const char *propname = "interrupt-parent";
phandle_t node, iparent;
if ((node = OF_finddevice(nodepath)) == -1)
return;
if (OF_getencprop(node, propname, &iparent, sizeof(iparent)) <= 0)
return;
if (iparent != gpcxref)
return;
OF_setprop(node, propname, &gicxref, sizeof(gicxref));
}
static void
fix_fdt_interrupt_data(void)
{
phandle_t gicipar, gicnode, gicxref;
phandle_t gpcipar, gpcnode, gpcxref;
phandle_t socipar, socnode;
int result;
socnode = OF_finddevice("/soc");
if (socnode == -1)
return;
result = OF_getencprop(socnode, "interrupt-parent", &socipar,
sizeof(socipar));
if (result <= 0)
return;
/* GIC node may be child of soc node, or appear directly at root. */
gicnode = OF_finddevice("/soc/interrupt-controller@00a01000");
if (gicnode == -1)
@ -143,11 +155,13 @@ fix_fdt_interrupt_data(void)
return;
gpcxref = OF_xref_from_node(gpcnode);
if (socipar != gpcxref || gpcipar != gicxref || gicipar != gicxref)
if (gpcipar != gicxref || gicipar != gicxref)
return;
gicxref = cpu_to_fdt32(gicxref);
OF_setprop(socnode, "interrupt-parent", &gicxref, sizeof(gicxref));
fix_node_iparent("/soc", gpcxref, gicxref);
fix_node_iparent("/pmu", gpcxref, gicxref);
fix_node_iparent("/tempmon", gpcxref, gicxref);
}
static void