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mmc: sdhci-omap: Add custom set_uhs_signaling sdhci_host ops
UHS-1 DDR50 and MMC DDR52 mode require DDR bit to be set in the configuration register (MMCHS_CON). Add sdhci-omap specific set_uhs_signaling ops to set this bit. Also while setting the UHSMS bit, clock should be disabled. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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1 changed files with 22 additions and 1 deletions
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@ -31,6 +31,7 @@
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#define SDHCI_OMAP_CON 0x12c
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#define SDHCI_OMAP_CON 0x12c
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#define CON_DW8 BIT(5)
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#define CON_DW8 BIT(5)
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#define CON_DMA_MASTER BIT(20)
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#define CON_DMA_MASTER BIT(20)
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#define CON_DDR BIT(19)
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#define CON_CLKEXTFREE BIT(16)
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#define CON_CLKEXTFREE BIT(16)
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#define CON_PADEN BIT(15)
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#define CON_PADEN BIT(15)
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#define CON_INIT BIT(1)
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#define CON_INIT BIT(1)
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@ -461,6 +462,26 @@ static void sdhci_omap_init_74_clocks(struct sdhci_host *host, u8 power_mode)
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enable_irq(host->irq);
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enable_irq(host->irq);
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}
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}
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static void sdhci_omap_set_uhs_signaling(struct sdhci_host *host,
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unsigned int timing)
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{
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u32 reg;
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struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
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struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host);
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sdhci_omap_stop_clock(omap_host);
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reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON);
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if (timing == MMC_TIMING_UHS_DDR50 || timing == MMC_TIMING_MMC_DDR52)
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reg |= CON_DDR;
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else
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reg &= ~CON_DDR;
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sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg);
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sdhci_set_uhs_signaling(host, timing);
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sdhci_omap_start_clock(omap_host);
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}
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static struct sdhci_ops sdhci_omap_ops = {
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static struct sdhci_ops sdhci_omap_ops = {
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.set_clock = sdhci_omap_set_clock,
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.set_clock = sdhci_omap_set_clock,
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.set_power = sdhci_omap_set_power,
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.set_power = sdhci_omap_set_power,
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@ -470,7 +491,7 @@ static struct sdhci_ops sdhci_omap_ops = {
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.set_bus_width = sdhci_omap_set_bus_width,
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.set_bus_width = sdhci_omap_set_bus_width,
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.platform_send_init_74_clocks = sdhci_omap_init_74_clocks,
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.platform_send_init_74_clocks = sdhci_omap_init_74_clocks,
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.reset = sdhci_reset,
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.reset = sdhci_reset,
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.set_uhs_signaling = sdhci_set_uhs_signaling,
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.set_uhs_signaling = sdhci_omap_set_uhs_signaling,
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};
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};
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static int sdhci_omap_set_capabilities(struct sdhci_omap_host *omap_host)
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static int sdhci_omap_set_capabilities(struct sdhci_omap_host *omap_host)
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