[PATCH v4 5/6] cpufreq: qcom-nvmem: provide separate configuration data for apq8064

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

APQ8064 can scale core voltage according to the frequency needs. Rather
than reusing the A/B format multiplexer, use a simple fuse parsing
function and configure required regulator.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/cpufreq/qcom-cpufreq-nvmem.c | 49 ++++++++++++++++++++++++++--
 1 file changed, 47 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c
index 81c080b854fe..35e2610c9526 100644
--- a/drivers/cpufreq/qcom-cpufreq-nvmem.c
+++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
@@ -26,6 +26,7 @@
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
 #include <linux/pm_opp.h>
+#include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 #include <linux/soc/qcom/smem.h>
 
@@ -39,6 +40,7 @@ struct qcom_cpufreq_match_data {
 			   char **pvs_name,
 			   struct qcom_cpufreq_drv *drv);
 	const char **genpd_names;
+	const char * const *regulator_names;
 };
 
 struct qcom_cpufreq_drv {
@@ -203,6 +205,34 @@ static int qcom_cpufreq_krait_name_version(struct device *cpu_dev,
 	return ret;
 }
 
+static int qcom_cpufreq_apq8064_name_version(struct device *cpu_dev,
+					     struct nvmem_cell *speedbin_nvmem,
+					     char **pvs_name,
+					     struct qcom_cpufreq_drv *drv)
+{
+	int speed = 0, pvs = 0;
+	u8 *speedbin;
+	size_t len;
+	int ret = 0;
+
+	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
+	if (IS_ERR(speedbin))
+		return PTR_ERR(speedbin);
+
+	if (len != 4)
+		return -EINVAL;
+
+	get_krait_bin_format_a(cpu_dev, &speed, &pvs, speedbin);
+
+	snprintf(*pvs_name, sizeof("speedXX-pvsXX"), "speed%d-pvs%d",
+		 speed, pvs);
+
+	drv->versions = (1 << speed);
+
+	kfree(speedbin);
+	return ret;
+}
+
 static const struct qcom_cpufreq_match_data match_data_kryo = {
 	.get_version = qcom_cpufreq_kryo_name_version,
 };
@@ -217,6 +247,16 @@ static const struct qcom_cpufreq_match_data match_data_qcs404 = {
 	.genpd_names = qcs404_genpd_names,
 };
 
+static const char * apq8064_regulator_names[] = {
+	"vdd-core",
+	NULL
+};
+
+static const struct qcom_cpufreq_match_data match_data_apq8064 = {
+	.get_version = qcom_cpufreq_apq8064_name_version,
+	.regulator_names = apq8064_regulator_names,
+};
+
 static int qcom_cpufreq_probe(struct platform_device *pdev)
 {
 	struct qcom_cpufreq_drv *drv;
@@ -304,7 +344,12 @@ static int qcom_cpufreq_probe(struct platform_device *pdev)
 			config.virt_devs = NULL;
 		}
 
-		if (config.supported_hw || config.genpd_names) {
+		if (drv->data->regulator_names)
+			config.regulator_names = drv->data->regulator_names;
+
+		if (config.supported_hw ||
+		    config.genpd_names ||
+		    config.regulator_names) {
 			drv->opp_tokens[cpu] = dev_pm_opp_set_config(cpu_dev, &config);
 			if (drv->opp_tokens[cpu] < 0) {
 				ret = drv->opp_tokens[cpu];
@@ -361,7 +406,7 @@ static const struct of_device_id qcom_cpufreq_match_list[] __initconst = {
 	{ .compatible = "qcom,msm8996", .data = &match_data_kryo },
 	{ .compatible = "qcom,qcs404", .data = &match_data_qcs404 },
 	{ .compatible = "qcom,ipq8064", .data = &match_data_krait },
-	{ .compatible = "qcom,apq8064", .data = &match_data_krait },
+	{ .compatible = "qcom,apq8064", .data = &match_data_apq8064 },
 	{ .compatible = "qcom,msm8974", .data = &match_data_krait },
 	{ .compatible = "qcom,msm8960", .data = &match_data_krait },
 	{},
-- 
2.39.2