[ARM] realview: convert to clkdev and lookup clocks by device name

People often point to the Integrator/Versatile/Realview
implementations to justify using the consumer name as the sole
selector for clocks.

Eliminate this excuse by changing the Realview implementation, so
it provides a better example of how it should be done.

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

1 files changed, 50 insertions, 2 deletions

diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index 2f04d54711e..2491374818e 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -29,6 +29,7 @@
 #include <linux/clockchips.h>
 #include <linux/io.h>
 
+#include <asm/clkdev.h>
 #include <asm/system.h>
 #include <mach/hardware.h>
 #include <asm/irq.h>
@@ -188,13 +189,60 @@ static void realview_oscvco_set(struct clk *clk, struct icst307_vco vco)
         writel(0, sys_lock);
 }
 
-struct clk realview_clcd_clk = {
-        .name   = "CLCDCLK",
+static struct clk oscvco_clk = {
         .params = &realview_oscvco_params,
         .setvco = realview_oscvco_set,
 };
 
 /*
+ * These are fixed clocks.
+ */
+static struct clk ref24_clk = {
+        .rate   = 24000000,
+};
+
+static struct clk_lookup lookups[] = {
+        {       /* UART0 */
+                .dev_id         = "dev:f1",
+                .clk            = &ref24_clk,
+        }, {    /* UART1 */
+                .dev_id         = "dev:f2",
+                .clk            = &ref24_clk,
+        }, {    /* UART2 */
+                .dev_id         = "dev:f3",
+                .clk            = &ref24_clk,
+        }, {    /* UART3 */
+                .dev_id         = "fpga:09",
+                .clk            = &ref24_clk,
+        }, {    /* KMI0 */
+                .dev_id         = "fpga:06",
+                .clk            = &ref24_clk,
+        }, {    /* KMI1 */
+                .dev_id         = "fpga:07",
+                .clk            = &ref24_clk,
+        }, {    /* MMC0 */
+                .dev_id         = "fpga:05",
+                .clk            = &ref24_clk,
+        }, {    /* EB:CLCD */
+                .dev_id         = "dev:20",
+                .clk            = &oscvco_clk,
+        }, {    /* PB:CLCD */
+                .dev_id         = "issp:20",
+                .clk            = &oscvco_clk,
+        }
+};
+
+static int __init clk_init(void)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(lookups); i++)
+                clkdev_add(&lookups[i]);
+        return 0;
+}
+arch_initcall(clk_init);
+
+/*
  * CLCD support.
  */
 #define SYS_CLCD_NLCDIOON       (1 << 2)