From 11592aa862e67f4477dee7e94d5c8244d893de1b Mon Sep 17 00:00:00 2001
From: Robert Marko <robimarko@gmail.com>
Date: Sat, 31 Dec 2022 13:03:41 +0100
Subject: [PATCH] cpufreq: qcom-nvmem: add support for IPQ8074

IPQ8074 comes in 2 families:
* IPQ8070A/IPQ8071A (Acorn) up to 1.4GHz
* IPQ8072A/IPQ8074A/IPQ8076A/IPQ8078A (Hawkeye) up to 2.2GHz

So, in order to be able to share one OPP table lets add support for IPQ8074
family based of SMEM SoC ID-s as speedbin fuse is always 0 on IPQ8074.

IPQ8074 compatible is blacklisted from DT platdev as the cpufreq device
will get created by NVMEM CPUFreq driver.

Signed-off-by: Robert Marko <robimarko@gmail.com>
---
Changes in v2:
* Print an error if SMEM ID is not part of the IPQ8074 family
and restrict the speed to Acorn variant (1.4GHz)
---
 drivers/cpufreq/cpufreq-dt-platdev.c |  1 +
 drivers/cpufreq/qcom-cpufreq-nvmem.c | 43 ++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

--- a/drivers/cpufreq/cpufreq-dt-platdev.c
+++ b/drivers/cpufreq/cpufreq-dt-platdev.c
@@ -164,6 +164,7 @@ static const struct of_device_id blockli
 	{ .compatible = "ti,omap3", },
 
 	{ .compatible = "qcom,ipq8064", },
+	{ .compatible = "qcom,ipq8074", },
 	{ .compatible = "qcom,apq8064", },
 	{ .compatible = "qcom,msm8974", },
 	{ .compatible = "qcom,msm8960", },
--- a/drivers/cpufreq/qcom-cpufreq-nvmem.c
+++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
@@ -31,6 +31,9 @@
 
 #include <dt-bindings/arm/qcom,ids.h>
 
+#define IPQ8074_HAWKEYE_VERSION		BIT(0)
+#define IPQ8074_ACORN_VERSION		BIT(1)
+
 struct qcom_cpufreq_drv;
 
 struct qcom_cpufreq_match_data {
@@ -204,6 +207,41 @@ len_error:
 	return ret;
 }
 
+static int qcom_cpufreq_ipq8074_name_version(struct device *cpu_dev,
+					     struct nvmem_cell *speedbin_nvmem,
+					     char **pvs_name,
+					     struct qcom_cpufreq_drv *drv)
+{
+	u32 msm_id;
+	int ret;
+	*pvs_name = NULL;
+
+	ret = qcom_smem_get_soc_id(&msm_id);
+	if (ret)
+		return ret;
+
+	switch (msm_id) {
+	case QCOM_ID_IPQ8070A:
+	case QCOM_ID_IPQ8071A:
+		drv->versions = IPQ8074_ACORN_VERSION;
+		break;
+	case QCOM_ID_IPQ8072A:
+	case QCOM_ID_IPQ8074A:
+	case QCOM_ID_IPQ8076A:
+	case QCOM_ID_IPQ8078A:
+		drv->versions = IPQ8074_HAWKEYE_VERSION;
+		break;
+	default:
+		dev_err(cpu_dev,
+			"SoC ID %u is not part of IPQ8074 family, limiting to 1.4GHz!\n",
+			msm_id);
+		drv->versions = IPQ8074_ACORN_VERSION;
+		break;
+	}
+
+	return 0;
+}
+
 static const struct qcom_cpufreq_match_data match_data_kryo = {
 	.get_version = qcom_cpufreq_kryo_name_version,
 };
@@ -218,6 +256,10 @@ static const struct qcom_cpufreq_match_d
 	.genpd_names = qcs404_genpd_names,
 };
 
+static const struct qcom_cpufreq_match_data match_data_ipq8074 = {
+	.get_version = qcom_cpufreq_ipq8074_name_version,
+};
+
 static int qcom_cpufreq_probe(struct platform_device *pdev)
 {
 	struct qcom_cpufreq_drv *drv;
@@ -363,6 +405,7 @@ static const struct of_device_id qcom_cp
 	{ .compatible = "qcom,msm8996", .data = &match_data_kryo },
 	{ .compatible = "qcom,qcs404", .data = &match_data_qcs404 },
 	{ .compatible = "qcom,ipq8064", .data = &match_data_krait },
+	{ .compatible = "qcom,ipq8074", .data = &match_data_ipq8074 },
 	{ .compatible = "qcom,apq8064", .data = &match_data_krait },
 	{ .compatible = "qcom,msm8974", .data = &match_data_krait },
 	{ .compatible = "qcom,msm8960", .data = &match_data_krait },