Add ICE clock scaling API based on the parsed clk supported
frequencies from dt entry.

Signed-off-by: Abhinaba Rakshit <abhinaba.rakshit@oss.qualcomm.com>
---
 drivers/soc/qcom/ice.c | 25 +++++++++++++++++++++++++
 include/soc/qcom/ice.h |  1 +
 2 files changed, 26 insertions(+)

diff --git a/drivers/soc/qcom/ice.c b/drivers/soc/qcom/ice.c
index c467b55b41744ebec0680f5112cc4bb1ba00c513..ec8d6bb9f426deee1038616282176bfc8e5b9ec1 100644
--- a/drivers/soc/qcom/ice.c
+++ b/drivers/soc/qcom/ice.c
@@ -97,6 +97,8 @@ struct qcom_ice {
 	struct clk *core_clk;
 	bool use_hwkm;
 	bool hwkm_init_complete;
+	u32 max_freq;
+	u32 min_freq;
 };
 
 static bool qcom_ice_check_supported(struct qcom_ice *ice)
@@ -514,10 +516,25 @@ int qcom_ice_import_key(struct qcom_ice *ice,
 }
 EXPORT_SYMBOL_GPL(qcom_ice_import_key);
 
+int qcom_ice_scale_clk(struct qcom_ice *ice, bool scale_up)
+{
+	int ret = 0;
+
+	if (scale_up && ice->max_freq)
+		ret = clk_set_rate(ice->core_clk, ice->max_freq);
+	else if (!scale_up && ice->min_freq)
+		ret = clk_set_rate(ice->core_clk, ice->min_freq);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(qcom_ice_scale_clk);
+
 static struct qcom_ice *qcom_ice_create(struct device *dev,
 					void __iomem *base)
 {
 	struct qcom_ice *engine;
+	const __be32 *prop;
+	int len;
 
 	if (!qcom_scm_is_available())
 		return ERR_PTR(-EPROBE_DEFER);
@@ -549,6 +566,14 @@ static struct qcom_ice *qcom_ice_create(struct device *dev,
 	if (IS_ERR(engine->core_clk))
 		return ERR_CAST(engine->core_clk);
 
+	prop = of_get_property(dev->of_node, "freq-table-hz", &len);
+	if (!prop || len < 2 * sizeof(uint32_t)) {
+		dev_err(dev, "Freq-hz property not found or invalid length\n");
+	} else {
+		engine->min_freq = be32_to_cpu(prop[0]);
+		engine->max_freq = be32_to_cpu(prop[1]);
+	}
+
 	if (!qcom_ice_check_supported(engine))
 		return ERR_PTR(-EOPNOTSUPP);
 
diff --git a/include/soc/qcom/ice.h b/include/soc/qcom/ice.h
index 4bee553f0a59d86ec6ce20f7c7b4bce28a706415..b701ec9e062f70152f6dea8bf6c4637ab6ef20f1 100644
--- a/include/soc/qcom/ice.h
+++ b/include/soc/qcom/ice.h
@@ -30,5 +30,6 @@ int qcom_ice_import_key(struct qcom_ice *ice,
 			const u8 *raw_key, size_t raw_key_size,
 			u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]);
 struct qcom_ice *devm_of_qcom_ice_get(struct device *dev);
+int qcom_ice_scale_clk(struct qcom_ice *ice, bool scale_up);
 
 #endif /* __QCOM_ICE_H__ */

-- 
2.34.1