Merge "msm: pm-8x60: Add SNOC request for faster warmboot"
diff --git a/Documentation/devicetree/bindings/arm/msm/pm_snoc_client.txt b/Documentation/devicetree/bindings/arm/msm/pm_snoc_client.txt
new file mode 100644
index 0000000..4f7111f
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/msm/pm_snoc_client.txt
@@ -0,0 +1,35 @@
+* MSM PM SNOC client
+
+MSM PM SNOC client device is used to setup a bus request for 100 Mhz for the
+SNOC bus when the Apps cores are active. This bus request helps mitigate the
+exit latency from power collapse in cases where there aren't any active bus
+requests for SNOC.
+
+This device is dependent on the pm-8x60 device, which configures the low power
+mode of respective cores.
+
+The required properties of this device are:
+
+- compatible: qcom,pm-snoc-client
+- qcom,msm-bus,name: String representing the client-name
+- qcom,msm-bus,num-cases: Total number of usecases
+- qcom,msm-bus,active-only: Boolean context flag for requests in active or
+ dual (active & sleep) contex
+- qcom,msm-bus,num-paths: Total number of master-slave pairs
+- qcom,msm-bus,vectors-KBps: Arrays of unsigned integers representing:
+ master-id, slave-id, arbitrated bandwidth
+ in KBps, instantaneous bandwidth in KBps
+
+
+Example:
+ qcom,pm-snoc-client {
+ compatible = "qcom,pm-snoc-client";
+ qcom,msm-bus,name = "ocimem_snoc";
+ qcom,msm-bus,num-cases = <2>;
+ qcom,msm-bus,active-only;
+ qcom,msm-bus,num-paths = <1>;
+ qcom,msm-bus,vectors =
+ <22 512 0 0>,
+ <22 512 320000 3200000>;
+ };
+
diff --git a/arch/arm/mach-msm/pm-8x60.c b/arch/arm/mach-msm/pm-8x60.c
index afb2b84..5c1b5bf 100644
--- a/arch/arm/mach-msm/pm-8x60.c
+++ b/arch/arm/mach-msm/pm-8x60.c
@@ -36,6 +36,7 @@
#include <mach/scm.h>
#include <mach/socinfo.h>
#include <mach/msm-krait-l2-accessors.h>
+#include <mach/msm_bus.h>
#include <asm/cacheflush.h>
#include <asm/hardware/gic.h>
#include <asm/pgtable.h>
@@ -1110,6 +1111,36 @@
.enter = msm_pm_enter,
.valid = suspend_valid_only_mem,
};
+
+static int __devinit msm_pm_snoc_client_probe(struct platform_device *pdev)
+{
+ int rc = 0;
+ static struct msm_bus_scale_pdata *msm_pm_bus_pdata;
+ static uint32_t msm_pm_bus_client;
+
+ msm_pm_bus_pdata = msm_bus_cl_get_pdata(pdev);
+
+ if (msm_pm_bus_pdata) {
+ msm_pm_bus_client =
+ msm_bus_scale_register_client(msm_pm_bus_pdata);
+
+ if (!msm_pm_bus_client) {
+ pr_err("%s: Failed to register SNOC client",
+ __func__);
+ rc = -ENXIO;
+ goto snoc_cl_probe_done;
+ }
+
+ rc = msm_bus_scale_client_update_request(msm_pm_bus_client, 1);
+
+ if (rc)
+ pr_err("%s: Error setting bus rate", __func__);
+ }
+
+snoc_cl_probe_done:
+ return rc;
+}
+
static int __devinit msm_cpu_status_probe(struct platform_device *pdev)
{
struct msm_pm_sleep_status_data *pdata;
@@ -1198,6 +1229,21 @@
},
};
+static struct of_device_id msm_snoc_clnt_match_tbl[] = {
+ {.compatible = "qcom,pm-snoc-client"},
+ {},
+};
+
+static struct platform_driver msm_cpu_pm_snoc_client_driver = {
+ .probe = msm_pm_snoc_client_probe,
+ .driver = {
+ .name = "pm_snoc_client",
+ .owner = THIS_MODULE,
+ .of_match_table = msm_snoc_clnt_match_tbl,
+ },
+};
+
+
static int __init msm_pm_setup_saved_state(void)
{
pgd_t *pc_pgd;
@@ -1538,6 +1584,14 @@
return rc;
}
+ rc = platform_driver_register(&msm_cpu_pm_snoc_client_driver);
+
+ if (rc) {
+ pr_err("%s(): failed to register driver %s\n", __func__,
+ msm_cpu_pm_snoc_client_driver.driver.name);
+ return rc;
+ }
+
return platform_driver_register(&msm_pm_8x60_driver);
}
device_initcall(msm_pm_8x60_init);