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This has worked so far because each SoC uses one interface for both requesting and reading frequency. Tegra234/238 use MMIO, and Tegra194 uses system registers. Tegra264 requests frequency through MMIO but reads its counters from system registers. It needs the mapping but has no ACTMON counters. Add a needs_mmio flag so the mapping no longer depends on actmon_cntr_base. No functional change. Signed-off-by: Sumit Gupta --- drivers/cpufreq/tegra194-cpufreq.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c index a3aaebde41cc..047166463efe 100644 --- a/drivers/cpufreq/tegra194-cpufreq.c +++ b/drivers/cpufreq/tegra194-cpufreq.c @@ -71,6 +71,7 @@ struct tegra_cpufreq_soc { u64 cnt_mask; int maxcpus_per_cluster; unsigned int num_clusters; + bool needs_mmio; phys_addr_t actmon_cntr_base; u32 refclk_delta_min; }; @@ -221,6 +222,7 @@ static struct tegra_cpufreq_ops tegra234_cpufreq_ops = { static const struct tegra_cpufreq_soc tegra234_cpufreq_soc = { .ops = &tegra234_cpufreq_ops, .cnt_mask = U32_MAX, + .needs_mmio = true, .actmon_cntr_base = 0x9000, .maxcpus_per_cluster = 4, .num_clusters = 3, @@ -230,6 +232,7 @@ static const struct tegra_cpufreq_soc tegra234_cpufreq_soc = { static const struct tegra_cpufreq_soc tegra238_cpufreq_soc = { .ops = &tegra234_cpufreq_ops, .cnt_mask = U32_MAX, + .needs_mmio = true, .actmon_cntr_base = 0x4000, .maxcpus_per_cluster = 8, .num_clusters = 1, @@ -734,8 +737,7 @@ static int tegra194_cpufreq_probe(struct platform_device *pdev) if (!data->bpmp_luts) return -ENOMEM; - if (soc->actmon_cntr_base) { - /* mmio registers are used for frequency request and re-construction */ + if (soc->needs_mmio) { data->regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(data->regs)) return PTR_ERR(data->regs); -- 2.34.1