[PATCH V4 01/10] remoteproc: qcom: Add PRNG proxy clock

Gokul Sriram Palanisamy
2019-12-18T16:05:37Z

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

Signed-off-by: Gokul Sriram Palanisamy <gokulsri@codeaurora.org>
Signed-off-by: Sricharan R <sricharan@codeaurora.org>
Signed-off-by: Nikhil Prakash V <nprakash@codeaurora.org>
---
changes since v1: none
---
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 a2671a1..eddc05b 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;
- 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_rproc_glink glink_subdev;
@@ -151,6 +139,21 @@ struct q6v5_wcss {
bool requires_force_stop;
};

+struct wcss_data {
+ int (*init_clock)(struct q6v5_wcss *wcss);
+ int (*init_regulator)(struct q6v5_wcss *wcss);
+ const char *firmware_name;
+ 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 */
@@ -732,6 +741,7 @@ static int q6v5_wcss_stop(struct rproc *rproc)
return ret;
}

+ clk_disable_unprepare(wcss->prng_clk);
qcom_q6v5_unprepare(&wcss->q6v5);

return 0;
@@ -889,7 +899,21 @@ 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;

@@ -979,7 +1003,7 @@ 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))
@@ -1023,12 +1047,14 @@ static int q6v5_wcss_probe(struct platform_device *pdev)
if (ret)
goto free_rproc;

- if (wcss->version == WCSS_QCS404) {
- ret = q6v5_wcss_init_clock(wcss);
+ if (desc->init_clock) {
+ ret = desc->init_clock(wcss);
if (ret)
goto free_rproc;
+ }

- ret = q6v5_wcss_init_regulator(wcss);
+ if (desc->init_regulator) {
+ ret = desc->init_regulator(wcss);
if (ret)
goto free_rproc;
}
@@ -1073,6 +1099,7 @@ static int 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,
@@ -1082,6 +1109,8 @@ static int q6v5_wcss_remove(struct platform_device *pdev)
};

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,
--
1.9.1