[PATCH v9 1/8] remoteproc: qcom: Add PRNG proxy clock

[Gokul Sriram Palanisamy]

PRNG clock is needed by the secure PIL, support for the same
is added in subsequent patches.

Signed-off-by: Nikhil Prakash V <quic_nprak...@quicinc.com>
Signed-off-by: Sricharan R <quic_srich...@quicinc.com>
Signed-off-by: Gokul Sriram Palanisamy <quic_gokul...@quicinc.com>
---
 drivers/remoteproc/qcom_q6v5_wcss.c | 65 +++++++++++++++++++++--------
 1 file changed, 47 insertions(+), 18 deletions(-)

diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c 
b/drivers/remoteproc/qcom_q6v5_wcss.c
index 94f68c919ee6..366b19cbd994 100644
--- a/drivers/remoteproc/qcom_q6v5_wcss.c
+++ b/drivers/remoteproc/qcom_q6v5_wcss.c
@@ -91,19 +91,6 @@ enum {
        WCSS_QCS404,
 };
 
-struct wcss_data {
-       const char *firmware_name;
-       unsigned int crash_reason_smem;
-       u32 version;
-       bool aon_reset_required;
-       bool wcss_q6_reset_required;
-       const char *ssr_name;
-       const char *sysmon_name;
-       int ssctl_id;
-       const struct rproc_ops *ops;
-       bool requires_force_stop;
-};
-
 struct q6v5_wcss {
        struct device *dev;
 
@@ -128,6 +115,7 @@ struct q6v5_wcss {
        struct clk *qdsp6ss_xo_cbcr;
        struct clk *qdsp6ss_core_gfmux;
        struct clk *lcc_bcr_sleep;
+       struct clk *prng_clk;
        struct regulator *cx_supply;
        struct qcom_sysmon *sysmon;
 
@@ -151,6 +139,21 @@ struct q6v5_wcss {
        struct qcom_rproc_ssr ssr_subdev;
 };
 
+struct wcss_data {
+       int (*init_clock)(struct q6v5_wcss *wcss);
+       int (*init_regulator)(struct q6v5_wcss *wcss);
+       const char *firmware_name;
+       unsigned int crash_reason_smem;
+       u32 version;
+       bool aon_reset_required;
+       bool wcss_q6_reset_required;
+       const char *ssr_name;
+       const char *sysmon_name;
+       int ssctl_id;
+       const struct rproc_ops *ops;
+       bool requires_force_stop;
+};
+
 static int q6v5_wcss_reset(struct q6v5_wcss *wcss)
 {
        int ret;
@@ -240,6 +243,12 @@ static int q6v5_wcss_start(struct rproc *rproc)
        struct q6v5_wcss *wcss = rproc->priv;
        int ret;
 
+       ret = clk_prepare_enable(wcss->prng_clk);
+       if (ret) {
+               dev_err(wcss->dev, "prng clock enable failed\n");
+               return ret;
+       }
+
        qcom_q6v5_prepare(&wcss->q6v5);
 
        /* Release Q6 and WCSS reset */
@@ -733,6 +742,7 @@ static int q6v5_wcss_stop(struct rproc *rproc)
                        return ret;
        }
 
+       clk_disable_unprepare(wcss->prng_clk);
        qcom_q6v5_unprepare(&wcss->q6v5);
 
        return 0;
@@ -899,7 +909,21 @@ static int q6v5_alloc_memory_region(struct q6v5_wcss *wcss)
        return 0;
 }
 
-static int q6v5_wcss_init_clock(struct q6v5_wcss *wcss)
+static int ipq8074_init_clock(struct q6v5_wcss *wcss)
+{
+       int ret;
+
+       wcss->prng_clk = devm_clk_get(wcss->dev, "prng");
+       if (IS_ERR(wcss->prng_clk)) {
+               ret = PTR_ERR(wcss->prng_clk);
+               if (ret != -EPROBE_DEFER)
+                       dev_err(wcss->dev, "Failed to get prng clock\n");
+               return ret;
+       }
+       return 0;
+}
+
+static int qcs404_init_clock(struct q6v5_wcss *wcss)
 {
        int ret;
 
@@ -989,7 +1013,7 @@ static int q6v5_wcss_init_clock(struct q6v5_wcss *wcss)
        return 0;
 }
 
-static int q6v5_wcss_init_regulator(struct q6v5_wcss *wcss)
+static int qcs404_init_regulator(struct q6v5_wcss *wcss)
 {
        wcss->cx_supply = devm_regulator_get(wcss->dev, "cx");
        if (IS_ERR(wcss->cx_supply))
@@ -1033,12 +1057,14 @@ static int q6v5_wcss_probe(struct platform_device *pdev)
        if (ret)
                return ret;
 
-       if (wcss->version == WCSS_QCS404) {
-               ret = q6v5_wcss_init_clock(wcss);
+       if (desc->init_clock) {
+               ret = desc->init_clock(wcss);
                if (ret)
                        return ret;
+       }
 
-               ret = q6v5_wcss_init_regulator(wcss);
+       if (desc->init_regulator) {
+               ret = desc->init_regulator(wcss);
                if (ret)
                        return ret;
        }
@@ -1078,6 +1104,7 @@ static void q6v5_wcss_remove(struct platform_device *pdev)
 }
 
 static const struct wcss_data wcss_ipq8074_res_init = {
+       .init_clock = ipq8074_init_clock,
        .firmware_name = "IPQ8074/q6_fw.mdt",
        .crash_reason_smem = WCSS_CRASH_REASON,
        .aon_reset_required = true,
@@ -1087,6 +1114,8 @@ static const struct wcss_data wcss_ipq8074_res_init = {
 };
 
 static const struct wcss_data wcss_qcs404_res_init = {
+       .init_clock = qcs404_init_clock,
+       .init_regulator = qcs404_init_regulator,
        .crash_reason_smem = WCSS_CRASH_REASON,
        .firmware_name = "wcnss.mdt",
        .version = WCSS_QCS404,
-- 
2.34.1