[U-Boot] [PATCH V3 04/10] spi: bcm63xx_hsspi: Continue init when using no reset and fixed-clock.

[Philippe Reynes]

From: Kursad Oney <kursad.oney at broadcom.com>

The Broadcom ARM implementations do not yet have a clock framework so
one can use a fixed clock as the root clock of the hsspi block. The
fixed clock does not have an "enable" routine, since it's always
enabled. So when we hit this issue, getting an ENOSYS return, do not
bail but continue initialization.

Similarly the block might already have been out of reset, say, when
we are booting from a SPI device. So if the reset signal is not configured
in the device tree, do not bail out and instead skip deasserting the reset.

Signed-off-by: Kursad Oney <kursad.oney at broadcom.com>
Reviewed-by: Philippe Reynes <philippe.reynes at softathome.com>
---
 drivers/spi/bcm63xx_hsspi.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

Changelog:
v3:
- no change
v2:
- no change

diff --git a/drivers/spi/bcm63xx_hsspi.c b/drivers/spi/bcm63xx_hsspi.c
index 7306531..e82b80c 100644
--- a/drivers/spi/bcm63xx_hsspi.c
+++ b/drivers/spi/bcm63xx_hsspi.c
@@ -349,32 +349,31 @@ static int bcm63xx_hsspi_probe(struct udevice *dev)
 		return ret;
 
 	ret = clk_enable(&clk);
-	if (ret < 0)
+	if (ret < 0 && ret != -ENOSYS)
 		return ret;
 
 	ret = clk_free(&clk);
-	if (ret < 0)
+	if (ret < 0 && ret != -ENOSYS)
 		return ret;
 
 	/* get clock rate */
 	ret = clk_get_by_name(dev, "pll", &clk);
-	if (ret < 0)
+	if (ret < 0 && ret != -ENOSYS)
 		return ret;
 
 	priv->clk_rate = clk_get_rate(&clk);
 
 	ret = clk_free(&clk);
-	if (ret < 0)
+	if (ret < 0 && ret != -ENOSYS)
 		return ret;
 
 	/* perform reset */
 	ret = reset_get_by_index(dev, 0, &rst_ctl);
-	if (ret < 0)
-		return ret;
-
-	ret = reset_deassert(&rst_ctl);
-	if (ret < 0)
-		return ret;
+	if (ret >= 0) {
+		ret = reset_deassert(&rst_ctl);
+		if (ret < 0)
+			return ret;
+	}
 
 	ret = reset_free(&rst_ctl);
 	if (ret < 0)
-- 
2.7.4