From: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Date: Wed, 1 Feb 2017 19:40:43 +0000 (+0530)
Subject: mmc: sdhci: Add support for platform/board specific tuning
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=999f731068f78f72171e784ed691cc2cb804d9e1;p=thirdparty%2Fu-boot.git

mmc: sdhci: Add support for platform/board specific tuning

Add support to execute platform/board specific tuning needed
for SDR104 and SDR50 UHS modes.This patch adds hook routine
to support specific tuning requirements.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 2b6ca06d9ee..20cfdb3e454 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -309,11 +309,19 @@ static int sdhci_execute_tuning(struct mmc *mmc, u8 opcode)
 	struct mmc_cmd cmd;
 	struct mmc_data data;
 	u32 ctrl;
+	int err;
 	u8 tuning_loop_counter = 40;
 	struct sdhci_host *host = mmc->priv;
 
 	debug("%s\n", __func__);
 
+	if (host->platform_execute_tuning) {
+		err = host->platform_execute_tuning(mmc, opcode);
+		if (err)
+			return err;
+		return 0;
+	}
+
 	ctrl = sdhci_readw(host, SDHCI_HOST_CTRL2);
 	ctrl |= SDHCI_CTRL_EXEC_TUNING;
 	sdhci_writew(host, ctrl, SDHCI_HOST_CTRL2);
diff --git a/include/sdhci.h b/include/sdhci.h
index 20138b35d5c..a8b52571988 100644
--- a/include/sdhci.h
+++ b/include/sdhci.h
@@ -269,6 +269,7 @@ struct sdhci_host {
 
 	void (*set_control_reg)(struct sdhci_host *host);
 	void (*set_clock)(int dev_index, unsigned int div);
+	int (*platform_execute_tuning)(struct mmc *host, u8 opcode);
 	uint	voltages;
 
 	struct mmc_config cfg;