[PATCH 2/3] mmc: core: Add DT bindings for eMMC high-speed DDR 1.8/1.2V
From: Ulf Hansson <hidden>
Date: 2014-02-14 12:27:08
Also in:
linux-mmc
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Ulf Hansson, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Provide the option to configure these speed modes per host, for those host driver's that can't distinguish this in runtime. Signed-off-by: Ulf Hansson <redacted> --- Documentation/devicetree/bindings/mmc/mmc.txt | 2 ++ drivers/mmc/core/host.c | 4 ++++ 2 files changed, 6 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index bd2ce67..519d952 100644
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt@@ -34,6 +34,8 @@ Optional properties: - cap-power-off-card: powering off the card is safe - cap-sdio-irq: enable SDIO IRQ signalling on this interface - full-pwr-cycle: full power cycle of the card is supported +- mmc-highspeed-ddr-1_8v: eMMC high-speed DDR mode(1.8V I/O) is supported +- mmc-highspeed-ddr-1_2v: eMMC high-speed DDR mode(1.2V I/O) is supported *NOTE* on CD and WP polarity. To use common for all SD/MMC host controllers line polarity properties, we have to fix the meaning of the "normal" and "inverted"
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 2644d91..d014127 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c@@ -439,6 +439,10 @@ int mmc_of_parse(struct mmc_host *host) host->pm_caps |= MMC_PM_KEEP_POWER; if (of_find_property(np, "enable-sdio-wakeup", &len)) host->pm_caps |= MMC_PM_WAKE_SDIO_IRQ; + if (of_find_property(np, "mmc-ddr-1_8v", &len)) + host->caps |= MMC_CAP_1_8V_DDR; + if (of_find_property(np, "mmc-ddr-1_2v", &len)) + host->caps |= MMC_CAP_1_2V_DDR; return 0;
--
1.7.9.5