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authorAapo Vienamo <avienamo@nvidia.com>2018-07-13 16:17:45 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2018-07-16 11:58:38 +0200
commit44350993d01c901cc201ef2663fd0fded2e03d06 (patch)
treeb563558c12c433d2f293ff1a7656a2a2077f174a /drivers/mmc
parent8312b97c7c08bd0fc489ee5db809dee9102a289f (diff)
downloadlinux-44350993d01c901cc201ef2663fd0fded2e03d06.tar.bz2
mmc: tegra: Add and use tegra_sdhci_get_max_clock()
Implement and use tegra_sdhci_get_max_clock() which returns the true maximum host clock rate. The issue with tegra_sdhci_get_max_clock() is that it returns the current clock rate of the host instead of the maximum one, which can lead to unnecessarily small clock rates. This differs from the previous implementation of tegra_sdhci_get_max_clock() in that it doesn't divide the result by two. Signed-off-by: Aapo Vienamo <avienamo@nvidia.com> Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci-tegra.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index 28b98e26106b..ddf001669609 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -235,6 +235,13 @@ static void tegra_sdhci_set_uhs_signaling(struct sdhci_host *host,
sdhci_set_uhs_signaling(host, timing);
}
+static unsigned int tegra_sdhci_get_max_clock(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+
+ return clk_round_rate(pltfm_host->clk, UINT_MAX);
+}
+
static void tegra_sdhci_set_tap(struct sdhci_host *host, unsigned int tap)
{
u32 reg;
@@ -299,7 +306,7 @@ static const struct sdhci_ops tegra_sdhci_ops = {
.platform_execute_tuning = tegra_sdhci_execute_tuning,
.set_uhs_signaling = tegra_sdhci_set_uhs_signaling,
.voltage_switch = tegra_sdhci_voltage_switch,
- .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+ .get_max_clock = tegra_sdhci_get_max_clock,
};
static const struct sdhci_pltfm_data sdhci_tegra20_pdata = {
@@ -356,7 +363,7 @@ static const struct sdhci_ops tegra114_sdhci_ops = {
.platform_execute_tuning = tegra_sdhci_execute_tuning,
.set_uhs_signaling = tegra_sdhci_set_uhs_signaling,
.voltage_switch = tegra_sdhci_voltage_switch,
- .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+ .get_max_clock = tegra_sdhci_get_max_clock,
};
static const struct sdhci_pltfm_data sdhci_tegra114_pdata = {