mmc: renesas_sdhi: use recent tap values for HS400

New datasheets require different and new values for HS400 with 4taps or
8taps.

Signed-off-by: Wolfram Sang <[e-mail]>
Reviewed-by: Yoshihiro Shimoda <[e-mail]>
Tested-by: Yoshihiro Shimoda <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/renesas_sdhi.h

···
 
 struct renesas_sdhi_scc {
 	unsigned long clk_rate;	/* clock rate for SDR104 */
-	u32 tap;		/* sampling clock position for SDR104 */
-	u32 tap_hs400;		/* sampling clock position for HS400 */
+	u32 tap;		/* sampling clock position for SDR104/HS400 (8 TAP) */
+	u32 tap_hs400_4tap;	/* sampling clock position for HS400 (4 TAP) */
 };
 
 struct renesas_sdhi_of_data {

drivers/mmc/host/renesas_sdhi_core.c

···
 	     host->mmc->caps2 & (MMC_CAP2_HS200_1_8V_SDR |
 				 MMC_CAP2_HS400_1_8V))) {
 		const struct renesas_sdhi_scc *taps = of_data->taps;
+		bool use_4tap = priv->quirks && priv->quirks->hs400_4taps;
 		bool hit = false;
 
 		for (i = 0; i < of_data->taps_num; i++) {
 			if (taps[i].clk_rate == 0 ||
 			    taps[i].clk_rate == host->mmc->f_max) {
 				priv->scc_tappos = taps->tap;
-				priv->scc_tappos_hs400 = taps->tap_hs400;
+				priv->scc_tappos_hs400 = use_4tap ?
+							 taps->tap_hs400_4tap :
+							 taps->tap;
 				hit = true;
 				break;
 			}

drivers/mmc/host/renesas_sdhi_internal_dmac.c

···
 	{
 		.clk_rate = 0,
 		.tap = 0x00000300,
-		.tap_hs400 = 0x00000704,
+		.tap_hs400_4tap = 0x00000100,
 	},
 };