From: Prathamesh Shete pshete@nvidia.com
[ Upstream commit b78870e7f41534cc719c295d1f8809aca93aeeab ]
Ensure tegra_host member "curr_clk_rate" holds the actual clock rate instead of requested clock rate for proper use during tuning correction algorithm. Actual clk rate may not be the same as the requested clk frequency depending on the parent clock source set. Tuning correction algorithm depends on certain parameters which are sensitive to current clk rate. If the host clk is selected instead of the actual clock rate, tuning correction algorithm may end up applying invalid correction, which could result in errors
Fixes: ea8fc5953e8b ("mmc: tegra: update hw tuning process") Signed-off-by: Aniruddha TVS Rao anrao@nvidia.com Signed-off-by: Prathamesh Shete pshete@nvidia.com Acked-by: Adrian Hunter adrian.hunter@intel.com Acked-by: Thierry Reding treding@nvidia.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20221006130622.22900-4-pshete@nvidia.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mmc/host/sdhci-tegra.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index d50b691f6c44..67211fc42d24 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -760,7 +760,7 @@ static void tegra_sdhci_set_clock(struct sdhci_host *host, unsigned int clock) */ host_clk = tegra_host->ddr_signaling ? clock * 2 : clock; clk_set_rate(pltfm_host->clk, host_clk); - tegra_host->curr_clk_rate = host_clk; + tegra_host->curr_clk_rate = clk_get_rate(pltfm_host->clk); if (tegra_host->ddr_signaling) host->max_clk = host_clk; else