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authorAnton Vorontsov <avorontsov@ru.mvista.com>2009-08-27 07:35:50 +0000
committerDavid S. Miller <davem@davemloft.net>2009-08-30 21:51:33 -0700
commited24157ede901608e00f28b4897398a373e1e926 (patch)
tree9c925bcaf5adb61084719c93ac579e82e6a169b2 /arch/powerpc/sysdev/qe_lib
parente0ad2cd8ff7fb957be867d17d44fb4b7093c91bd (diff)
downloadop-kernel-dev-ed24157ede901608e00f28b4897398a373e1e926.zip
op-kernel-dev-ed24157ede901608e00f28b4897398a373e1e926.tar.gz
powerpc/qe: Implement qe_alive_during_sleep() helper function
In some CPUs (i.e. MPC8569) QE shuts down completely during sleep, drivers may want to know that to reinitialize registers and buffer descriptors. This patch implements qe_alive_during_sleep() helper function, so far it just checks if MPC8569-compatible power management controller is present, which is a sign that QE turns off during sleep. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/powerpc/sysdev/qe_lib')
-rw-r--r--arch/powerpc/sysdev/qe_lib/qe.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c
index 237e365..464271b 100644
--- a/arch/powerpc/sysdev/qe_lib/qe.c
+++ b/arch/powerpc/sysdev/qe_lib/qe.c
@@ -65,6 +65,19 @@ 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;
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