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authorSibi Sankar <sibis@codeaurora.org>2018-08-29 22:12:15 +0300
committerBjorn Andersson <bjorn.andersson@linaro.org>2018-10-05 21:46:04 +0300
commit29a5f9aaf9d365c46f1f9058375061a51ccea4a2 (patch)
treec1b102790ebd0bec9b985dc0cc22fbe595289502 /drivers/remoteproc
parent9e483efd3470d1335ad1c7e10db527dca5c412a3 (diff)
downloadlinux-29a5f9aaf9d365c46f1f9058375061a51ccea4a2.tar.xz
remoteproc: qcom: q6v5-pil: Add PDC reset for modem on SDM845 SoCs
In the presence of a PDC block working with subsystem RSC, assert/deassert PDC reset in modem start/stop path. Signed-off-by: Sibi Sankar <sibis@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc')
-rw-r--r--drivers/remoteproc/qcom_q6v5_mss.c29
1 files changed, 24 insertions, 5 deletions
diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index 325a3f2c35bd..a839b07a58b1 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -149,6 +149,7 @@ struct q6v5 {
u32 halt_nc;
struct reset_control *mss_restart;
+ struct reset_control *pdc_reset;
struct qcom_q6v5 q6v5;
@@ -347,10 +348,17 @@ static int q6v5_load(struct rproc *rproc, const struct firmware *fw)
static int q6v5_reset_assert(struct q6v5 *qproc)
{
- if (qproc->has_alt_reset)
- return reset_control_reset(qproc->mss_restart);
- else
- return reset_control_assert(qproc->mss_restart);
+ int ret;
+
+ if (qproc->has_alt_reset) {
+ reset_control_assert(qproc->pdc_reset);
+ ret = reset_control_reset(qproc->mss_restart);
+ reset_control_deassert(qproc->pdc_reset);
+ } else {
+ ret = reset_control_assert(qproc->mss_restart);
+ }
+
+ return ret;
}
static int q6v5_reset_deassert(struct q6v5 *qproc)
@@ -358,9 +366,11 @@ static int q6v5_reset_deassert(struct q6v5 *qproc)
int ret;
if (qproc->has_alt_reset) {
+ reset_control_assert(qproc->pdc_reset);
writel(1, qproc->rmb_base + RMB_MBA_ALT_RESET);
ret = reset_control_reset(qproc->mss_restart);
writel(0, qproc->rmb_base + RMB_MBA_ALT_RESET);
+ reset_control_deassert(qproc->pdc_reset);
} else {
ret = reset_control_deassert(qproc->mss_restart);
}
@@ -1072,6 +1082,15 @@ static int q6v5_init_reset(struct q6v5 *qproc)
return PTR_ERR(qproc->mss_restart);
}
+ if (qproc->has_alt_reset) {
+ qproc->pdc_reset = devm_reset_control_get_exclusive(qproc->dev,
+ "pdc_reset");
+ if (IS_ERR(qproc->pdc_reset)) {
+ dev_err(qproc->dev, "failed to acquire pdc reset\n");
+ return PTR_ERR(qproc->pdc_reset);
+ }
+ }
+
return 0;
}
@@ -1192,12 +1211,12 @@ static int q6v5_probe(struct platform_device *pdev)
}
qproc->active_reg_count = ret;
+ qproc->has_alt_reset = desc->has_alt_reset;
ret = q6v5_init_reset(qproc);
if (ret)
goto free_rproc;
qproc->version = desc->version;
- qproc->has_alt_reset = desc->has_alt_reset;
qproc->need_mem_protection = desc->need_mem_protection;
ret = qcom_q6v5_init(&qproc->q6v5, pdev, rproc, MPSS_CRASH_REASON_SMEM,