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SubjectRe: [PATCH 4/4] cpufreq: qcom-nvmem: make qcom_cpufreq_get_msm_id() return the SoC ID
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On 21.01.2023 12:29, Robert Marko wrote:
> Currently, qcom_cpufreq_get_msm_id() does not simply return the SoC ID
> after getting it via SMEM call but instead uses an enum to encode the
> matched SMEM ID to 2 variants of MSM8996 which are then used in
> qcom_cpufreq_kryo_name_version() to set the supported version.
>
> This prevents qcom_cpufreq_get_msm_id() from being universal and its doing
> more than its name suggests, so lets make it just return the SoC ID
> directly which allows matching directly on the SoC ID and removes the need
> for msm8996_version enum which simplifies the driver.
> It also allows reusing the qcom_cpufreq_get_msm_id() for new SoC-s.
>
> Signed-off-by: Robert Marko <robimarko@gmail.com>
> ---
> drivers/cpufreq/qcom-cpufreq-nvmem.c | 44 ++++++++--------------------
> 1 file changed, 12 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c
> index da55d2e1925a..9deaf9521d6d 100644
> --- a/drivers/cpufreq/qcom-cpufreq-nvmem.c
> +++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
> @@ -32,12 +32,6 @@
>
> #include <dt-bindings/arm/qcom,ids.h>
>
> -enum _msm8996_version {
> - MSM8996_V3,
> - MSM8996_SG,
> - NUM_OF_MSM8996_VERSIONS,
> -};
> -
> struct qcom_cpufreq_drv;
>
> struct qcom_cpufreq_match_data {
> @@ -134,30 +128,16 @@ static void get_krait_bin_format_b(struct device *cpu_dev,
> dev_dbg(cpu_dev, "PVS version: %d\n", *pvs_ver);
> }
>
> -static enum _msm8996_version qcom_cpufreq_get_msm_id(void)
> +static int qcom_cpufreq_get_msm_id(void)
This should be u32 as info->id is __le32

And please export this function from socinfo, it'll come in
useful for other drivers!

Konrad
> {
> size_t len;
> struct socinfo *info;
> - enum _msm8996_version version;
>
> info = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_HW_SW_BUILD_ID, &len);
> if (IS_ERR(info))
> - return NUM_OF_MSM8996_VERSIONS;
> + return PTR_ERR(info);
>
> - switch (info->id) {
> - case QCOM_ID_MSM8996:
> - case QCOM_ID_APQ8096:
> - version = MSM8996_V3;
> - break;
> - case QCOM_ID_MSM8996SG:
> - case QCOM_ID_APQ8096SG:
> - version = MSM8996_SG;
> - break;
> - default:
> - version = NUM_OF_MSM8996_VERSIONS;
> - }
> -
> - return version;
> + return info->id;
> }
>
> static int qcom_cpufreq_kryo_name_version(struct device *cpu_dev,
> @@ -166,25 +146,25 @@ static int qcom_cpufreq_kryo_name_version(struct device *cpu_dev,
> struct qcom_cpufreq_drv *drv)
> {
> size_t len;
> + int msm_id;
> u8 *speedbin;
> - enum _msm8996_version msm8996_version;
> *pvs_name = NULL;
>
> - msm8996_version = qcom_cpufreq_get_msm_id();
> - if (NUM_OF_MSM8996_VERSIONS == msm8996_version) {
> - dev_err(cpu_dev, "Not Snapdragon 820/821!");
> - return -ENODEV;
> - }
> + msm_id = qcom_cpufreq_get_msm_id();
> + if (msm_id < 0)
> + return msm_id;
>
> speedbin = nvmem_cell_read(speedbin_nvmem, &len);
> if (IS_ERR(speedbin))
> return PTR_ERR(speedbin);
>
> - switch (msm8996_version) {
> - case MSM8996_V3:
> + switch (msm_id) {
> + case QCOM_ID_MSM8996:
> + case QCOM_ID_APQ8096:
> drv->versions = 1 << (unsigned int)(*speedbin);
> break;
> - case MSM8996_SG:
> + case QCOM_ID_MSM8996SG:
> + case QCOM_ID_APQ8096SG:
> drv->versions = 1 << ((unsigned int)(*speedbin) + 4);
> break;
> default:

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