linux-kernel - [PATCH V1 03/11] mmc: sdhci: add support for post tuning process

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Date:   Fri, 1 Mar 2019 21:20:17 -0800
From:   Sowjanya Komatineni <skomatineni@...dia.com>
To:     <adrian.hunter@...el.com>, <ulf.hansson@...aro.org>,
        <robh+dt@...nel.org>, <mark.rutland@....com>,
        <riteshh@...eaurora.org>
CC:     <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <anrao@...dia.com>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-mmc@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        Sowjanya Komatineni <skomatineni@...dia.com>
Subject: [PATCH V1 03/11] mmc: sdhci: add support for post tuning process

This patch adds support for post tuning process needed for some hosts
to perform after successful completion of HW tuning.

Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
---
 drivers/mmc/host/sdhci.c | 6 +++++-
 drivers/mmc/host/sdhci.h | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index e9e919218006..976d4d1e2400 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2392,8 +2392,12 @@ static int __sdhci_execute_tuning(struct sdhci_host *host, u32 opcode)
 
 		ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 		if (!(ctrl & SDHCI_CTRL_EXEC_TUNING)) {
-			if (ctrl & SDHCI_CTRL_TUNED_CLK)
+			if (ctrl & SDHCI_CTRL_TUNED_CLK) {
+				if (host->ops->post_tuning)
+					host->ops->post_tuning(host);
 				return 0; /* Success! */
+			}
+
 			break;
 		}
 
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index c80e0d6f9b10..236d67778645 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -639,6 +639,7 @@ struct sdhci_ops {
 	void		(*reset)(struct sdhci_host *host, u8 mask);
 	int	(*platform_execute_tuning)(struct sdhci_host *host, u32 opcode);
 	int	(*get_max_tuning_loop_count)(struct sdhci_host *host);
+	void	(*post_tuning)(struct sdhci_host *host);
 	void	(*set_uhs_signaling)(struct sdhci_host *host, unsigned int uhs);
 	void	(*hw_reset)(struct sdhci_host *host);
 	void    (*adma_workaround)(struct sdhci_host *host, u32 intmask);
-- 
2.7.4