[PATCH 21/40] mmc: tegra: Parse default trim and tap from dt
From: Aapo Vienamo <hidden>
Date: 2018-08-01 16:33:50
Also in:
linux-mmc, linux-tegra, lkml
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, secure digital host controller interface (sdhci) driver, the rest · Maintainers:
Ulf Hansson, Adrian Hunter, Linus Torvalds
Parse the default inbound and outbound sampling trimmer values from the device tree. Signed-off-by: Aapo Vienamo <redacted> --- drivers/mmc/host/sdhci-tegra.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index a2375ad..bd3305e 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c@@ -107,6 +107,9 @@ struct sdhci_tegra { struct pinctrl_state *pinctrl_state_1v8; struct sdhci_tegra_autocal_offsets autocal_offsets; + + u32 default_tap; + u32 default_trim; }; static u16 tegra_sdhci_readw(struct sdhci_host *host, int reg)
@@ -460,6 +463,23 @@ static void tegra_sdhci_parse_pad_autocal_dt(struct sdhci_host *host) autocal->pull_down_hs400 = autocal->pull_down_1v8; } +static void tegra_sdhci_parse_default_tap_and_trim(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host); + int err; + + err = device_property_read_u32(host->mmc->parent, "nvidia,default-tap", + &tegra_host->default_tap); + if (err) + tegra_host->default_tap = 0; + + err = device_property_read_u32(host->mmc->parent, "nvidia,default-trim", + &tegra_host->default_trim); + if (err) + tegra_host->default_trim = 0; +} + static void tegra_sdhci_set_clock(struct sdhci_host *host, unsigned int clock) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
@@ -865,6 +885,8 @@ static int sdhci_tegra_probe(struct platform_device *pdev) tegra_sdhci_parse_pad_autocal_dt(host); + tegra_sdhci_parse_default_tap_and_trim(host); + tegra_host->power_gpio = devm_gpiod_get_optional(&pdev->dev, "power", GPIOD_OUT_HIGH); if (IS_ERR(tegra_host->power_gpio)) {
--
2.7.4