[PATCH v1 06/10] cpufreq: qti: Enable cpufreq for ipq53xx

[Varadarajan Narayanan <quic_varada@quicinc.com>]

IPQ53xx have different OPPs available for the CPU based on
SoC variant. This can be determined through use of an eFuse
register present in the silicon.

Added support for ipq53xx on nvmem driver which helps to
determine OPPs at runtime based on the eFuse register which
has the CPU frequency limits. opp-supported-hw dt binding
can be used to indicate the available OPPs for each limit.

nvmem driver also creates the "cpufreq-dt" platform_device after
passing the version matching data to the OPP framework so that the
cpufreq-dt handles the actual cpufreq implementation.

Signed-off-by: Kathiravan T <quic_kathirav@quicinc.com>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
---
 drivers/cpufreq/cpufreq-dt-platdev.c |  1 +
 drivers/cpufreq/qcom-cpufreq-nvmem.c | 15 +++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
index 02ec58a..f0c45d4 100644
--- a/drivers/cpufreq/cpufreq-dt-platdev.c
+++ b/drivers/cpufreq/cpufreq-dt-platdev.c
@@ -178,6 +178,7 @@ static const struct of_device_id blocklist[] __initconst = {
 	{ .compatible = "ti,am625", },
 	{ .compatible = "ti,am62a7", },
 
+	{ .compatible = "qcom,ipq5332", },
 	{ .compatible = "qcom,ipq8064", },
 	{ .compatible = "qcom,apq8064", },
 	{ .compatible = "qcom,msm8974", },
diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c
index 84d7033..49d21b0 100644
--- a/drivers/cpufreq/qcom-cpufreq-nvmem.c
+++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
@@ -146,6 +146,20 @@ static int qcom_cpufreq_kryo_name_version(struct device *cpu_dev,
 		return PTR_ERR(speedbin);
 
 	switch (msm_id) {
+	case QCOM_ID_IPQ5332:
+	case QCOM_ID_IPQ5322:
+	case QCOM_ID_IPQ5312:
+	case QCOM_ID_IPQ5302:
+	case QCOM_ID_IPQ5300:
+		/* Fuse Value    Freq    BIT to set
+		 * ---------------------------------
+		 *   2’b00     No Limit     BIT(0)
+		 *   2’b01     1.5 GHz      BIT(1)
+		 *   2’b10     1.2 Ghz      BIT(2)
+		 *   2’b11     1.0 GHz      BIT(3)
+		 */
+		drv->versions = 1 << (unsigned int)(*speedbin);
+		break;
 	case QCOM_ID_MSM8996:
 	case QCOM_ID_APQ8096:
 		drv->versions = 1 << (unsigned int)(*speedbin);
@@ -359,6 +373,7 @@ static const struct of_device_id qcom_cpufreq_match_list[] __initconst = {
 	{ .compatible = "qcom,apq8096", .data = &match_data_kryo },
 	{ .compatible = "qcom,msm8996", .data = &match_data_kryo },
 	{ .compatible = "qcom,qcs404", .data = &match_data_qcs404 },
+	{ .compatible = "qcom,ipq5332", .data = &match_data_kryo },
 	{ .compatible = "qcom,ipq8064", .data = &match_data_krait },
 	{ .compatible = "qcom,apq8064", .data = &match_data_krait },
 	{ .compatible = "qcom,msm8974", .data = &match_data_krait },
-- 
2.7.4