[PATCH v3 2/4] remoteproc: qcom: q6v5: Add support for q6 rmb registers

[Komal Bajaj]

From: Melody Olvera <quic_molv...@quicinc.com>

When attaching a running Q6, the remoteproc driver needs a way
to communicate with the Q6 using rmb registers, so allow the
rmb register to be gotten from the device tree if present.

Signed-off-by: Melody Olvera <quic_molv...@quicinc.com>
Signed-off-by: Komal Bajaj <quic_kba...@quicinc.com>
---
 drivers/remoteproc/qcom_q6v5.h     | 8 ++++++++
 drivers/remoteproc/qcom_q6v5_pas.c | 4 ++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/remoteproc/qcom_q6v5.h b/drivers/remoteproc/qcom_q6v5.h
index 5a859c41896e..95824d5b64ce 100644
--- a/drivers/remoteproc/qcom_q6v5.h
+++ b/drivers/remoteproc/qcom_q6v5.h
@@ -7,6 +7,12 @@
 #include <linux/completion.h>
 #include <linux/soc/qcom/qcom_aoss.h>

+#define RMB_BOOT_WAIT_REG 0x8
+#define RMB_BOOT_CONT_REG 0xC
+#define RMB_Q6_BOOT_STATUS_REG 0x10
+
+#define RMB_POLL_MAX_TIMES 250
+
 struct icc_path;
 struct rproc;
 struct qcom_smem_state;
@@ -16,6 +22,8 @@ struct qcom_q6v5 {
        struct device *dev;
        struct rproc *rproc;

+       void __iomem *rmb_base;
+
        struct qcom_smem_state *state;
        struct qmp *qmp;

diff --git a/drivers/remoteproc/qcom_q6v5_pas.c 
b/drivers/remoteproc/qcom_q6v5_pas.c
index 8458bcfe9e19..b9759f6b2283 100644
--- a/drivers/remoteproc/qcom_q6v5_pas.c
+++ b/drivers/remoteproc/qcom_q6v5_pas.c
@@ -770,6 +770,10 @@ static int adsp_probe(struct platform_device *pdev)
                goto free_rproc;
        adsp->proxy_pd_count = ret;

+       adsp->q6v5.rmb_base = devm_platform_ioremap_resource_byname(pdev, 
"rmb");
+       if (IS_ERR(adsp->q6v5.rmb_base))
+               adsp->q6v5.rmb_base = NULL;
+
        ret = qcom_q6v5_init(&adsp->q6v5, pdev, rproc, desc->crash_reason_smem, 
desc->load_state,
                             qcom_pas_handover);
        if (ret)
--
2.42.0