msm: scm-pas: Update bandwidth voting to support msm8974
The crypto engine used by the secure context lives behind a different
bus port than on previous targets. Update the bus bandwidth endpoints
accordingly. Clock APIs don't need to be called on a "bus_clk" for
8974 either, since the bus driver is responsible for all clocks on
the path from memory to the crypto core.
Change-Id: I91df9f2d4db77ade8b5a9c86e811cfd026b20af2
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>
diff --git a/arch/arm/mach-msm/scm-pas.c b/arch/arm/mach-msm/scm-pas.c
index 4096d9c..55ae2f8 100644
--- a/arch/arm/mach-msm/scm-pas.c
+++ b/arch/arm/mach-msm/scm-pas.c
@@ -94,7 +94,7 @@
{
int ret = 0;
- if (!scm_perf_client || !scm_bus_clk)
+ if (!scm_perf_client)
return -EINVAL;
mutex_lock(&scm_pas_bw_mutex);
@@ -102,7 +102,7 @@
ret = msm_bus_scale_client_update_request(scm_perf_client, 1);
if (ret) {
pr_err("bandwidth request failed (%d)\n", ret);
- } else {
+ } else if (scm_bus_clk) {
ret = clk_prepare_enable(scm_bus_clk);
if (ret)
pr_err("clock enable failed\n");
@@ -121,7 +121,8 @@
mutex_lock(&scm_pas_bw_mutex);
if (scm_pas_bw_count-- == 1) {
msm_bus_scale_client_update_request(scm_perf_client, 0);
- clk_disable_unprepare(scm_bus_clk);
+ if (scm_bus_clk)
+ clk_disable_unprepare(scm_bus_clk);
}
mutex_unlock(&scm_pas_bw_mutex);
}
@@ -190,16 +191,23 @@
static int __init scm_pas_init(void)
{
+ if (cpu_is_msm8974()) {
+ scm_pas_bw_tbl[0].vectors[0].src = MSM_BUS_MASTER_CRYPTO_CORE0;
+ scm_pas_bw_tbl[1].vectors[0].src = MSM_BUS_MASTER_CRYPTO_CORE0;
+ } else {
+ scm_bus_clk = clk_get_sys("scm", "bus_clk");
+ if (!IS_ERR(scm_bus_clk)) {
+ clk_set_rate(scm_bus_clk, 64000000);
+ } else {
+ scm_bus_clk = NULL;
+ pr_warn("unable to get bus clock\n");
+ }
+ }
+
scm_perf_client = msm_bus_scale_register_client(&scm_pas_bus_pdata);
if (!scm_perf_client)
pr_warn("unable to register bus client\n");
- scm_bus_clk = clk_get_sys("scm", "bus_clk");
- if (!IS_ERR(scm_bus_clk)) {
- clk_set_rate(scm_bus_clk, 64000000);
- } else {
- scm_bus_clk = NULL;
- pr_warn("unable to get bus clock\n");
- }
+
return 0;
}
module_init(scm_pas_init);