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Commit 6dbb6ee0 authored by Ulf Hansson's avatar Ulf Hansson Committed by Russell King
Browse files

ARM: 7617/1: mmc: mmci: Support for DDR mode 



Add support for DDR mode which may be used for the ux500v2 variant.
Corresponding capabilities to enable the DDR support must be set in
the platform struct to enable the functionality.

Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent d1c3ed66

drivers/mmc/host/mmci.c

+6 −0
Original line number Diff line number Diff line
@@ -202,6 +202,9 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired) 
	if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_8)

		clk |= MCI_ST_8BIT_BUS;



	if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50)

		clk |= MCI_ST_UX500_NEG_EDGE;



	mmci_write_clkreg(host, clk);

}
@@ -680,6 +683,9 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data) 
			mmci_write_clkreg(host, clk);

		}



	if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50)

		datactrl |= MCI_ST_DPSM_DDRMODE;



	/*

	 * Attempt to use DMA operation mode, if this

	 * should fail, fall back to PIO mode