[ARM] omap: spi: arrange for omap_uwire to use connection ID

... which now means no driver requests the "armxor_ck" clock directly.
Also, fix the error handling for clk_get(), ensuring that we propagate
the error returned from clk_get().

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-omap1/clock.c

@@ -133,6 +133,7 @@ static struct omap_clk omap_clks[] = {
 	CLK("i2c_omap.1", "fck",	&i2c_fck,	CK_16XX | CK_1510 | CK_310),
 	CLK("i2c_omap.1", "ick",	&i2c_ick,	CK_16XX),
 	CLK("i2c_omap.1", "ick",	&dummy_ck,	CK_1510 | CK_310),
+	CLK("omap_uwire", "fck",	&armxor_ck.clk,	CK_16XX | CK_1510 | CK_310),
 	CLK("omap-mcbsp.1", "ick",	&dspper_ck,	CK_16XX),
 	CLK("omap-mcbsp.1", "ick",	&dummy_ck,	CK_1510 | CK_310),
 	CLK("omap-mcbsp.2", "ick",	&armper_ck.clk,	CK_16XX),

drivers/spi/omap_uwire.c

@@ -506,11 +506,12 @@ static int __init uwire_probe(struct platform_device *pdev)
 
 	dev_set_drvdata(&pdev->dev, uwire);
 
-	uwire->ck = clk_get(&pdev->dev, "armxor_ck");
-	if (!uwire->ck || IS_ERR(uwire->ck)) {
-		dev_dbg(&pdev->dev, "no mpu_xor_clk ?\n");
+	uwire->ck = clk_get(&pdev->dev, "fck");
+	if (IS_ERR(uwire->ck)) {
+		status = PTR_ERR(uwire->ck);
+		dev_dbg(&pdev->dev, "no functional clock?\n");
 		spi_master_put(master);
-		return -ENODEV;
+		return status;
 	}
 	clk_enable(uwire->ck);