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remoteproc: qcom: q6v5-pil: Add PDC reset for modem on SDM845 SoCs

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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>
This commit is contained in:
Sibi Sankar 2018-08-30 00:42:15 +05:30 committed by Bjorn Andersson
parent 9e483efd34
commit 29a5f9aaf9
1 changed files with 24 additions and 5 deletions
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29
drivers/remoteproc/qcom_q6v5_mss.c
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@ -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,