[ARM] pxa: allow clk aliases

We need to support more than one name+device for a struct clk for a
small number of peripherals.  We do this by re-using struct clk alias
to another struct clk - IOW, if we find that the entry we're using is
an alias, we return the aliased entry not the one we found.

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

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c
index e5b417d14bb0..09ee131d24a1 100644
--- a/arch/arm/mach-pxa/pxa25x.c
+++ b/arch/arm/mach-pxa/pxa25x.c
@@ -117,6 +117,10 @@ static struct clk pxa25x_hwuart_clk =
 	INIT_CKEN("UARTCLK", HWUART, 14745600, 1, &pxa_device_hwuart.dev)
 ;
 
+/*
+ * PXA 2xx clock declarations. Order is important (see aliases below)
+ * Please be careful not to disrupt the ordering.
+ */
 static struct clk pxa25x_clks[] = {
 	INIT_CK("LCDCLK", LCD, &clk_pxa25x_lcd_ops, &pxa_device_fb.dev),
 	INIT_CKEN("UARTCLK", FFUART, 14745600, 1, &pxa_device_ffuart.dev),
@@ -140,6 +144,8 @@ static struct clk pxa25x_clks[] = {
 	INIT_CKEN("FICPCLK", FICP, 47923000, 0, NULL),
 };
 
+static struct clk gpio7_clk = INIT_CKOTHER("GPIO7_CK", &pxa25x_clks[4], NULL);
+
 #ifdef CONFIG_PM
 
 #define SAVE(x)		sleep_save[SLEEP_SAVE_##x] = x
@@ -311,6 +317,8 @@ static int __init pxa25x_init(void)
 	if (cpu_is_pxa25x())
 		ret = platform_device_register(&pxa_device_hwuart);
 
+	clks_register(&gpio7_clk, 1);
+
 	return ret;
 }