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authorAnton Vorontsov <avorontsov@ru.mvista.com>2009-09-16 01:43:54 +0400
committerKumar Gala <galak@kernel.crashing.org>2009-11-11 21:43:15 -0600
commit46d2293470c18c1bb632083bf0b589deff30ccae (patch)
treef0f0382c718138e4d2852ff0b753d96b380d4be6
parent0c7b87b0857f0e17be982fd840046444a83c3996 (diff)
powerpc/qe: QE also shuts down on MPC8568
It appears that QE shuts down on all MPC85xx CPUs (i.e. MPC8568 and MPC8569) and thus needs reset upon resume. So modify qe_alive_during_sleep() to account that. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
-rw-r--r--arch/powerpc/include/asm/qe.h23
-rw-r--r--arch/powerpc/sysdev/qe_lib/qe.c13
2 files changed, 22 insertions, 14 deletions
diff --git a/arch/powerpc/include/asm/qe.h b/arch/powerpc/include/asm/qe.h
index 908f0b75745..5e0e8b2b0aa 100644
--- a/arch/powerpc/include/asm/qe.h
+++ b/arch/powerpc/include/asm/qe.h
@@ -154,7 +154,28 @@ int qe_get_snum(void);
void qe_put_snum(u8 snum);
unsigned int qe_get_num_of_risc(void);
unsigned int qe_get_num_of_snums(void);
-int qe_alive_during_sleep(void);
+
+static inline int qe_alive_during_sleep(void)
+{
+ /*
+ * MPC8568E reference manual says:
+ *
+ * "...power down sequence waits for all I/O interfaces to become idle.
+ * In some applications this may happen eventually without actively
+ * shutting down interfaces, but most likely, software will have to
+ * take steps to shut down the eTSEC, QUICC Engine Block, and PCI
+ * interfaces before issuing the command (either the write to the core
+ * MSR[WE] as described above or writing to POWMGTCSR) to put the
+ * device into sleep state."
+ *
+ * MPC8569E reference manual has a similar paragraph.
+ */
+#ifdef CONFIG_PPC_85xx
+ return 0;
+#else
+ return 1;
+#endif
+}
/* we actually use cpm_muram implementation, define this for convenience */
#define qe_muram_init cpm_muram_init
diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c
index 1ed1a9fd9bc..4eaf2a96291 100644
--- a/arch/powerpc/sysdev/qe_lib/qe.c
+++ b/arch/powerpc/sysdev/qe_lib/qe.c
@@ -65,19 +65,6 @@ static unsigned int qe_num_of_snum;
static phys_addr_t qebase = -1;
-int qe_alive_during_sleep(void)
-{
- static int ret = -1;
-
- if (ret != -1)
- return ret;
-
- ret = !of_find_compatible_node(NULL, NULL, "fsl,mpc8569-pmc");
-
- return ret;
-}
-EXPORT_SYMBOL(qe_alive_during_sleep);
-
phys_addr_t get_qe_base(void)
{
struct device_node *qe;