mmc: omap_hsmmc: make it possible to compile out ADMA support

Some platforms don't have ADMA controllers. For those platforms, compiling
it out reduces the size of the binary by about 600 bytes.
Leaving the support in doesn't break things as the driver checks at runtime
if the ADMA2 controller is present.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Tested-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

drivers/mmc/Kconfig

@@ -239,6 +239,15 @@ config MMC_OMAP_HS
 
 	  If unsure, say N.
 
+config MMC_OMAP_HS_ADMA
+	bool "ADMA support for OMAP HS MMC"
+	depends on MMC_OMAP_HS && !OMAP34XX
+	default y if !AM33XX
+	help
+	  This enables support for the ADMA2 controller (SDA3.00 Part A2 DMA
+	  controller). If supported by the hardware, selecting this option will
+	  increase performances.
+
 config MMC_OMAP36XX_PINS
 	bool "Enable MMC1 on OMAP36xx/37xx"
 	depends on OMAP34XX && MMC_OMAP_HS

drivers/mmc/omap_hsmmc.c

@@ -93,7 +93,7 @@ struct omap_hsmmc_data {
 	enum bus_mode mode;
 #endif
 	u8 controller_flags;
-#ifndef CONFIG_OMAP34XX
+#ifdef CONFIG_MMC_OMAP_HS_ADMA
 	struct omap_hsmmc_adma_desc *adma_desc_table;
 	uint desc_slot;
 #endif
@@ -117,7 +117,7 @@ struct omap_mmc_of_data {
 	u8 controller_flags;
 };
 
-#ifndef CONFIG_OMAP34XX
+#ifdef CONFIG_MMC_OMAP_HS_ADMA
 struct omap_hsmmc_adma_desc {
 	u8 attr;
 	u8 reserved;
@@ -741,7 +741,7 @@ static int omap_hsmmc_init_setup(struct mmc *mmc)
 			return -ETIMEDOUT;
 		}
 	}
-#ifndef CONFIG_OMAP34XX
+#ifdef CONFIG_MMC_OMAP_HS_ADMA
 	reg_val = readl(&mmc_base->hl_hwinfo);
 	if (reg_val & MADMA_EN)
 		priv->controller_flags |= OMAP_HSMMC_USE_ADMA;
@@ -834,7 +834,7 @@ static void mmc_reset_controller_fsm(struct hsmmc *mmc_base, u32 bit)
 	}
 }
 
-#ifndef CONFIG_OMAP34XX
+#ifdef CONFIG_MMC_OMAP_HS_ADMA
 static void omap_hsmmc_adma_desc(struct mmc *mmc, char *buf, u16 len, bool end)
 {
 	struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
@@ -1037,7 +1037,7 @@ static int omap_hsmmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
 		else
 			flags |= (DP_DATA | DDIR_WRITE);
 
-#ifndef CONFIG_OMAP34XX
+#ifdef CONFIG_MMC_OMAP_HS_ADMA
 		if ((priv->controller_flags & OMAP_HSMMC_USE_ADMA) &&
 		    !mmc_is_tuning_cmd(cmd->cmdidx)) {
 			omap_hsmmc_prepare_data(mmc, data);
@@ -1082,7 +1082,7 @@ static int omap_hsmmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
 		}
 	}
 
-#ifndef CONFIG_OMAP34XX
+#ifdef CONFIG_MMC_OMAP_HS_ADMA
 	if ((priv->controller_flags & OMAP_HSMMC_USE_ADMA) && data &&
 	    !mmc_is_tuning_cmd(cmd->cmdidx)) {
 		u32 sz_mb, timeout;