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

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On 9/30/23 12:21, Robert Marko wrote:
From: Christian Marangi <ansuelsmth@xxxxxxxxx>

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@xxxxxxxxx>
Signed-off-by: Robert Marko <robimarko@xxxxxxxxx>
---
[...]

+{
+	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))
The stray newline above this line triggers my OCD :D

+		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;
speedbin leaks here

you can free it right after the get_krait.. call
+
+	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);
Then drop the format for `speed` and just throw in a zero!

[...]

-	{ .compatible = "qcom,ipq8064", .data = &match_data_krait },
+	{ .compatible = "qcom,ipq8064", .data = &match_data_ipq8064 },
This change demands a Fixes tag, because you're essentially saying "the support for this SoC was supposedly there, but it could have never worked and was broken all along".

Konrad




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