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mmc: tegra: Configure default trim value on reset

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Program the outbound sampling trim value in tegra_sdhci_reset(). Unlike
the outbound tap value this does not depend on the signaling mode and
needs to be only programmed once.

Signed-off-by: Aapo Vienamo <avienamo@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Aapo Vienamo 2018-08-30 18:06:23 +03:00 committed by Ulf Hansson
parent c2c09678f8
commit 41a0b8d748
1 changed files with 6 additions and 1 deletions
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7
drivers/mmc/host/sdhci-tegra.c
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@ -37,6 +37,8 @@
#define SDHCI_TEGRA_VENDOR_CLOCK_CTRL 0x100
#define SDHCI_CLOCK_CTRL_TAP_MASK 0x00ff0000
#define SDHCI_CLOCK_CTRL_TAP_SHIFT 16
#define SDHCI_CLOCK_CTRL_TRIM_MASK 0x1f000000
#define SDHCI_CLOCK_CTRL_TRIM_SHIFT 24
#define SDHCI_CLOCK_CTRL_SDR50_TUNING_OVERRIDE BIT(5)
#define SDHCI_CLOCK_CTRL_PADPIPE_CLKEN_OVERRIDE BIT(3)
#define SDHCI_CLOCK_CTRL_SPI_MODE_CLKEN_OVERRIDE BIT(2)
@ -287,7 +289,8 @@ static void tegra_sdhci_reset(struct sdhci_host *host, u8 mask)
SDHCI_MISC_CTRL_ENABLE_DDR50 |
SDHCI_MISC_CTRL_ENABLE_SDR104);
clk_ctrl &= ~SDHCI_CLOCK_CTRL_SPI_MODE_CLKEN_OVERRIDE;
clk_ctrl &= ~(SDHCI_CLOCK_CTRL_TRIM_MASK |
SDHCI_CLOCK_CTRL_SPI_MODE_CLKEN_OVERRIDE);
if (tegra_sdhci_is_pad_and_regulator_valid(host)) {
/* Erratum: Enable SDHCI spec v3.00 support */
@ -304,6 +307,8 @@ static void tegra_sdhci_reset(struct sdhci_host *host, u8 mask)
clk_ctrl |= SDHCI_CLOCK_CTRL_SDR50_TUNING_OVERRIDE;
}
clk_ctrl |= tegra_host->default_trim << SDHCI_CLOCK_CTRL_TRIM_SHIFT;
sdhci_writel(host, misc_ctrl, SDHCI_TEGRA_VENDOR_MISC_CTRL);
sdhci_writel(host, clk_ctrl, SDHCI_TEGRA_VENDOR_CLOCK_CTRL);