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authorMax Krummenacher <max.krummenacher@toradex.com>2018-05-02 11:21:06 +0200
committerMarcel Ziswiler <marcel.ziswiler@toradex.com>2018-12-24 01:27:33 +0100
commit0bdcbf1e6a75d054559f1cc0c07e82aca32f2827 (patch)
tree12650b3dee974beb2ad05330a070641cb56645a0
parentdcf44f91b98ba6c22113c24a33e6a40690d1bee0 (diff)
arm: imx: gpc: do not poweroff M/F mix in suspend
The Colibri iMX6ULL 256MB crashes in resume if the M/F mix domain is powered down when suspending. With this workaround this does not happen. Crash looks as follows: root@colibri-imx6ull:~# echo +3 > /sys/class/rtc/rtc1/wakealarm; echo mem > /sys/power/state [ 52.800741] PM: Syncing filesystems ... done. [ 52.856715] Freezing user space processes ... (elapsed 0.001 seconds) done. [ 52.865669] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done. [ 52.875024] Suspending console(s) (use no_console_suspend to debug) [ 52.950638] PM: suspend of devices complete after 68.211 msecs [ 52.952506] PM: late suspend of devices complete after 1.835 msecs [ 52.954292] PM: noirq suspend of devices complete after 1.757 msecs [ 52.954300] Disabling non-boot CPUs ... [ 52.954307] Turn off M/F mix! [ 52.955663] PM: noirq resume of devices complete after 1.222 msecs [ 52.956767] imx-sdma 20ec000.sdma: loaded firmware 3.3 [ 52.957669] PM: early resume of devices complete after 1.411 msecs [ 52.959140] gpmi-nand 1806000.gpmi-nand: use legacy bch geometry [ 53.005653] Suspended for 2.907 seconds [ 53.012207] PM: resume of devices complete after 54.507 msecs [ 53.073751] Restarting tasks ... done. root@colibri-imx6ull:~# [ 55.049753] gpmi-nand 1806000.gpmi-nand: DMA timeout, last DMA :2 [ 55.056377] gpmi-nand 1806000.gpmi-nand: Show GPMI registers : [ 55.062835] gpmi-nand 1806000.gpmi-nand: offset 0x000 : 0x00000000 Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com> Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
-rw-r--r--arch/arm/mach-imx/gpc.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/gpc.c b/arch/arm/mach-imx/gpc.c
index 551ecd0f2a4f..75a09e09fb4d 100644
--- a/arch/arm/mach-imx/gpc.c
+++ b/arch/arm/mach-imx/gpc.c
@@ -198,6 +198,7 @@ unsigned int imx_gpc_is_mf_mix_off(void)
static void imx_gpc_mf_mix_off(void)
{
+#if 0
int i;
for (i = 0; i < IMR_NUM; i++)
@@ -208,6 +209,7 @@ static void imx_gpc_mf_mix_off(void)
pr_info("Turn off M/F mix!\n");
/* turn off mega/fast mix */
writel_relaxed(0x1, gpc_base + GPC_PGC_MF_PDN);
+#endif
}
void imx_gpc_set_arm_power_up_timing(u32 sw2iso, u32 sw)