[PATCH 2/2] mmc: sdhci-of-aspeed: Add ast2700 support

[Ryan Chen]

Add support for the AST2700 SOC in the sd controller driver. AST2700 sd
controller requires an reset line, so hook up the optional reset control
and deassert it during probe.

Signed-off-by: Ryan Chen <ryan_chen at aspeedtech.com>
---
 drivers/mmc/host/sdhci-of-aspeed.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/mmc/host/sdhci-of-aspeed.c b/drivers/mmc/host/sdhci-of-aspeed.c
index ca97b01996b1..91c36245e506 100644
--- a/drivers/mmc/host/sdhci-of-aspeed.c
+++ b/drivers/mmc/host/sdhci-of-aspeed.c
@@ -520,6 +520,7 @@ static int aspeed_sdc_probe(struct platform_device *pdev)
 
 {
 	struct device_node *parent, *child;
+	struct reset_control *reset;
 	struct aspeed_sdc *sdc;
 	int ret;
 
@@ -529,6 +530,15 @@ static int aspeed_sdc_probe(struct platform_device *pdev)
 
 	spin_lock_init(&sdc->lock);
 
+	reset = reset_control_get_optional_exclusive(&pdev->dev, NULL);
+	if (IS_ERR(reset))
+		return dev_err_probe(&pdev->dev, PTR_ERR(reset),
+				     "unable to acquire reset\n");
+	ret = reset_control_deassert(sdc->rst);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret,
+				     "reset deassert failed\n");
+
 	sdc->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(sdc->clk))
 		return PTR_ERR(sdc->clk);
@@ -577,6 +587,7 @@ static const struct of_device_id aspeed_sdc_of_match[] = {
 	{ .compatible = "aspeed,ast2400-sd-controller", },
 	{ .compatible = "aspeed,ast2500-sd-controller", },
 	{ .compatible = "aspeed,ast2600-sd-controller", },
+	{ .compatible = "aspeed,ast2700-sd-controller", },
 	{ }
 };
 

-- 
2.34.1