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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
mmc: sdhci-of-dwcmshc: implement specific set_uhs_signaling
We need a different set_uhs_signaling implementation for
MMC_TIMING_MMC_HS and MMC_TIMING_MMC_HS400.
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20200513182602.3636a551@xhacker.debian
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
authored by
Jisheng Zhang
and committed by
Ulf Hansson
554232e8
e4bf1b09
+30
-1
+30
-1
drivers/mmc/host/sdhci-of-dwcmshc.c
+30
-1
drivers/mmc/host/sdhci-of-dwcmshc.c
···
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#include "sdhci-pltfm.h"
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/* DWCMSHC specific Mode Select value */
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#define DWCMSHC_CTRL_HS400 0x7
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#define BOUNDARY_OK(addr, len) \
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((addr | (SZ_128M - 1)) == ((addr + len - 1) | (SZ_128M - 1)))
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···
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sdhci_adma_write_desc(host, desc, addr, len, cmd);
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}
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static void dwcmshc_set_uhs_signaling(struct sdhci_host *host,
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unsigned int timing)
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{
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u16 ctrl_2;
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ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
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/* Select Bus Speed Mode for host */
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ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
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if ((timing == MMC_TIMING_MMC_HS200) ||
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(timing == MMC_TIMING_UHS_SDR104))
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ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
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else if (timing == MMC_TIMING_UHS_SDR12)
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ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
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else if ((timing == MMC_TIMING_UHS_SDR25) ||
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(timing == MMC_TIMING_MMC_HS))
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ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
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else if (timing == MMC_TIMING_UHS_SDR50)
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ctrl_2 |= SDHCI_CTRL_UHS_SDR50;
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else if ((timing == MMC_TIMING_UHS_DDR50) ||
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(timing == MMC_TIMING_MMC_DDR52))
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ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
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else if (timing == MMC_TIMING_MMC_HS400)
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ctrl_2 |= DWCMSHC_CTRL_HS400;
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sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
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}
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static const struct sdhci_ops sdhci_dwcmshc_ops = {
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.set_clock = sdhci_set_clock,
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.set_bus_width = sdhci_set_bus_width,
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.set_uhs_signaling = sdhci_set_uhs_signaling,
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.set_uhs_signaling = dwcmshc_set_uhs_signaling,
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.get_max_clock = sdhci_pltfm_clk_get_max_clock,
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.reset = sdhci_reset,
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.adma_write_desc = dwcmshc_adma_write_desc,