[PATCH v5 3/4] cpufreq: qcom-nvmem: add support for IPQ8064

Robert Marko
2023-09-30T10:22:39Z

From: Christian Marangi <ansuelsmth@gmail.com>

IPQ8064 comes in 3 families:
* IPQ8062 up to 1.0GHz
* IPQ8064/IPQ8066/IPQ8068 up to 1.4GHz
* IPQ8065/IPQ8069 up to 1.7Ghz

So, in order to be able to support one OPP table, add support for
IPQ8064 family based of SMEM SoC ID-s and correctly set the version so
opp-supported-hw can be correctly used.

Bit are set with the following logic:
* IPQ8062 BIT 0
* IPQ8064/IPQ8066/IPQ8068 BIT 1
* IPQ8065/IPQ8069 BIT 2

speed is never fused, only pvs values are fused.

IPQ806x SoC doesn't have pvs_version so we drop and we use the new
pattern:
opp-microvolt-speed0-pvs<PSV_VALUE>

Example:
- for ipq8062 psv2
opp-microvolt-speed0-pvs2 = < 925000 878750 971250>

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Robert Marko <robimarko@gmail.com>
---
Changes in v4:
* Free speedbin in case of an error

Changes in v3:
* Use enum for SoC version
* Dont evaluate speed as its not fused, only pvs

Changes in v2:
* Include IPQ8064 support

drivers/cpufreq/qcom-cpufreq-nvmem.c | 68 +++++++++++++++++++++++++++-
1 file changed, 67 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c
index ba9e1d60e5b5..3d93b511db86 100644
--- a/drivers/cpufreq/qcom-cpufreq-nvmem.c
+++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
@@ -35,6 +35,12 @@ enum ipq8074_versions {
IPQ8074_ACORN_VERSION,
};

+enum ipq806x_versions {
+ IPQ8062_VERSION = 0,
+ IPQ8064_VERSION,
+ IPQ8065_VERSION,
+};
+
struct qcom_cpufreq_drv;

struct qcom_cpufreq_match_data {
@@ -208,6 +214,62 @@ static int qcom_cpufreq_krait_name_version(struct device *cpu_dev,
return ret;
}

+static int qcom_cpufreq_ipq8064_name_version(struct device *cpu_dev,
+ struct nvmem_cell *speedbin_nvmem,
+ char **pvs_name,
+ struct qcom_cpufreq_drv *drv)
+{
+ int speed = 0, pvs = 0, pvs_ver = 0;
+ int msm_id, ret = 0;
+ u8 *speedbin;
+ size_t len;
+
+ speedbin = nvmem_cell_read(speedbin_nvmem, &len);
+
+ if (IS_ERR(speedbin))
+ return PTR_ERR(speedbin);
+
+ if (len != 4) {
+ dev_err(cpu_dev, "Unable to read nvmem data. Defaulting to 0!\n");
+ kfree(speedbin);
+ return -ENODEV;
+ }
+
+ get_krait_bin_format_a(cpu_dev, &speed, &pvs, &pvs_ver, speedbin);
+
+ ret = qcom_smem_get_soc_id(&msm_id);
+ if (ret)
+ return ret;
+
+ switch (msm_id) {
+ case QCOM_ID_IPQ8062:
+ drv->versions = BIT(IPQ8062_VERSION);
+ break;
+ case QCOM_ID_IPQ8064:
+ case QCOM_ID_IPQ8066:
+ case QCOM_ID_IPQ8068:
+ drv->versions = BIT(IPQ8064_VERSION);
+ break;
+ case QCOM_ID_IPQ8065:
+ case QCOM_ID_IPQ8069:
+ drv->versions = BIT(IPQ8065_VERSION);
+ break;
+ default:
+ dev_err(cpu_dev,
+ "SoC ID %u is not part of IPQ8064 family, limiting to 1.0GHz!\n",
+ msm_id);
+ drv->versions = BIT(IPQ8062_VERSION);
+ break;
+ }
+
+ /* IPQ8064 speed is never fused. Only pvs values are fused. */
+ snprintf(*pvs_name, sizeof("speedXX-pvsXX"), "speed%d-pvs%d",
+ speed, pvs);
+
+ kfree(speedbin);
+ return ret;
+}
+
static int qcom_cpufreq_ipq8074_name_version(struct device *cpu_dev,
struct nvmem_cell *speedbin_nvmem,
char **pvs_name,
@@ -257,6 +319,10 @@ static const struct qcom_cpufreq_match_data match_data_qcs404 = {
.genpd_names = qcs404_genpd_names,
};

+static const struct qcom_cpufreq_match_data match_data_ipq8064 = {
+ .get_version = qcom_cpufreq_ipq8064_name_version,
+};
+
static const struct qcom_cpufreq_match_data match_data_ipq8074 = {
.get_version = qcom_cpufreq_ipq8074_name_version,
};
@@ -403,7 +469,7 @@ 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,ipq8064", .data = &match_data_krait },
+ { .compatible = "qcom,ipq8064", .data = &match_data_ipq8064 },
{ .compatible = "qcom,ipq8074", .data = &match_data_ipq8074 },
{ .compatible = "qcom,apq8064", .data = &match_data_krait },
{ .compatible = "qcom,msm8974", .data = &match_data_krait },
--
2.41.0