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Subject[PATCH 3/3] cpufreq: brcmstb-avs-cpufreq: send S2_ENTER / S2_EXIT commands to AVS
Date
On suspend we send AVS_CMD_S2_ENTER and on resume AVS_CMD_S2_EXIT.
These are best effort calls, so we don't check the return code or take
any action if either of the calls fails.

Signed-off-by: Markus Mayer <mmayer@broadcom.com>
---
drivers/cpufreq/brcmstb-avs-cpufreq.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/brcmstb-avs-cpufreq.c b/drivers/cpufreq/brcmstb-avs-cpufreq.c
index 79a0538a531a..3e31e5d28b79 100644
--- a/drivers/cpufreq/brcmstb-avs-cpufreq.c
+++ b/drivers/cpufreq/brcmstb-avs-cpufreq.c
@@ -506,7 +506,14 @@ static int brcm_avs_suspend(struct cpufreq_policy *policy)
* AVS co-processor, not necessarily the P-state we are running at now.
* So, we get the current P-state explicitly.
*/
- return brcm_avs_get_pstate(priv, &priv->pmap.state);
+ ret = brcm_avs_get_pstate(priv, &priv->pmap.state);
+ if (ret)
+ return ret;
+
+ /* This is best effort. Nothing to do if it fails. */
+ (void)__issue_avs_command(priv, AVS_CMD_S2_ENTER, 0, 0, NULL);
+
+ return 0;
}

static int brcm_avs_resume(struct cpufreq_policy *policy)
@@ -514,6 +521,9 @@ static int brcm_avs_resume(struct cpufreq_policy *policy)
struct private_data *priv = policy->driver_data;
int ret;

+ /* This is best effort. Nothing to do if it fails. */
+ (void)__issue_avs_command(priv, AVS_CMD_S2_EXIT, 0, 0, NULL);
+
ret = brcm_avs_set_pmap(priv, &priv->pmap);
if (ret == -EEXIST) {
struct platform_device *pdev = cpufreq_get_driver_data();
--
2.17.1
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