From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sowjanya Komatineni Subject: [PATCH] sdhci: tegra: Add comment for PADCALIB and PAD_CONTROL NVQUIRKS Date: Thu, 4 Jun 2020 20:04:00 -0700 Message-ID: <1591326240-28928-1-git-send-email-skomatineni@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Sender: linux-mmc-owner@vger.kernel.org To: adrian.hunter@intel.com, ulf.hansson@linaro.org, thierry.reding@gmail.com, jonathanh@nvidia.com Cc: skomatineni@nvidia.com, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org List-Id: linux-tegra@vger.kernel.org This patch adds comments about NVQUIRKS HAS_PADCALIB and NEEDS_PAD_CONTROL. Signed-off-by: Sowjanya Komatineni --- drivers/mmc/host/sdhci-tegra.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index 3a372ab..0a3f9d0 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -96,7 +96,16 @@ #define NVQUIRK_ENABLE_SDR50 BIT(3) #define NVQUIRK_ENABLE_SDR104 BIT(4) #define NVQUIRK_ENABLE_DDR50 BIT(5) +/* + * HAS_PADCALIB NVQUIRK is for SoC's supporting auto calibration of pads + * drive strength. + */ #define NVQUIRK_HAS_PADCALIB BIT(6) +/* + * NEEDS_PAD_CONTROL NVQUIRK is for SoC's having separate 3V3 and 1V8 pads. + * 3V3/1V8 pad selection happens through pinctrl state selection depending + * on the signaling mode. + */ #define NVQUIRK_NEEDS_PAD_CONTROL BIT(7) #define NVQUIRK_DIS_CARD_CLK_CONFIG_TAP BIT(8) #define NVQUIRK_CQHCI_DCMD_R1B_CMD_TIMING BIT(9) -- 2.7.4