[PATCHv2 2/3] mmc: dw_mmc: Add support for SOCFPGA's platform specific implementation

[<dinguyen-EIB2kfCEclfQT0dZR+AlfA@public.gmane.org>]

From: Dinh Nguyen <dinguyen-EIB2kfCEclfQT0dZR+AlfA@public.gmane.org>

Like the rockchip, Altera's SOCFPGA platform specific implementation of the
dw_mmc driver requires using the HOLD register for SD commands.

Signed-off-by: Dinh Nguyen <dinguyen-EIB2kfCEclfQT0dZR+AlfA@public.gmane.org>
Acked-by: Steffen Trumtrar <s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Tested-by: Steffen Trumtrar <s.trumtrar-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>
Cc: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>
Cc: Ian Campbell <ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>
Cc: Kumar Gala <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Cc: Seungwon Jeon <tgih.jun-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
Cc: Jaehoon Chung <jh80.chung-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
Cc: Chris Ball <chris-OsFVWbfNK3isTnJN9+BGXg@public.gmane.org>
---
v2: Use dw_mci_socfpga_prepare_command instead of
    dw_mci_rockchip_prepare_command
---
 drivers/mmc/host/dw_mmc-pltfm.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c
index 5c49656..5b87cc2 100644
--- a/drivers/mmc/host/dw_mmc-pltfm.c
+++ b/drivers/mmc/host/dw_mmc-pltfm.c
@@ -30,10 +30,19 @@ static void dw_mci_rockchip_prepare_command(struct dw_mci *host, u32 *cmdr)
 	*cmdr |= SDMMC_CMD_USE_HOLD_REG;
 }
 
+static void dw_mci_socfpga_prepare_command(struct dw_mci *host, u32 *cmdr)
+{
+	*cmdr |= SDMMC_CMD_USE_HOLD_REG;
+}
+
 static const struct dw_mci_drv_data rockchip_drv_data = {
 	.prepare_command	= dw_mci_rockchip_prepare_command,
 };
 
+static const struct dw_mci_drv_data socfpga_drv_data = {
+	.prepare_command	= dw_mci_socfpga_prepare_command,
+};
+
 int dw_mci_pltfm_register(struct platform_device *pdev,
 			  const struct dw_mci_drv_data *drv_data)
 {
@@ -92,6 +101,8 @@ static const struct of_device_id dw_mci_pltfm_match[] = {
 	{ .compatible = "snps,dw-mshc", },
 	{ .compatible = "rockchip,rk2928-dw-mshc",
 		.data = &rockchip_drv_data },
+	{ .compatible = "altr,socfpga-dw-mshc",
+		.data = &socfpga_drv_data },
 	{},
 };
 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
-- 
1.7.9.5

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