clk: mxs: replace imx28 clk_register_clkdev with clock DT lookup

It really becomes a maintenance issue that every time a device needs
to look up (clk_get) a clock we have to patch kernel clock file to call
clk_register_clkdev for that clock.

Since clock DT support which is meant to resolve clock lookup in device
tree is in place, the patch moves imx28 client devices' clock lookup
over to device tree, so that any new lookup to be added at later time
can just get done in DT instead of kernel.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

1 files changed, 10 insertions, 103 deletions

diff --git a/drivers/clk/mxs/clk-imx28.c b/drivers/clk/mxs/clk-imx28.c
index e3aab67b3eb7..613e76f3758e 100644
--- a/drivers/clk/mxs/clk-imx28.c
+++ b/drivers/clk/mxs/clk-imx28.c
@@ -14,6 +14,7 @@
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/io.h>
+#include <linux/of.h>
 #include <mach/common.h>
 #include <mach/mx28.h>
 #include "clk.h"
@@ -120,90 +121,6 @@ static void __init clk_misc_init(void)
 	writel_relaxed(val, FRAC0);
 }
 
-static struct clk_lookup uart_lookups[] = {
-	{ .dev_id = "duart", },
-	{ .dev_id = "mxs-auart.0", },
-	{ .dev_id = "mxs-auart.1", },
-	{ .dev_id = "mxs-auart.2", },
-	{ .dev_id = "mxs-auart.3", },
-	{ .dev_id = "mxs-auart.4", },
-	{ .dev_id = "8006a000.serial", },
-	{ .dev_id = "8006c000.serial", },
-	{ .dev_id = "8006e000.serial", },
-	{ .dev_id = "80070000.serial", },
-	{ .dev_id = "80072000.serial", },
-	{ .dev_id = "80074000.serial", },
-};
-
-static struct clk_lookup hbus_lookups[] = {
-	{ .dev_id = "imx28-dma-apbh", },
-	{ .dev_id = "80004000.dma-apbh", },
-};
-
-static struct clk_lookup xbus_lookups[] = {
-	{ .dev_id = "duart", .con_id = "apb_pclk"},
-	{ .dev_id = "80074000.serial", .con_id = "apb_pclk"},
-	{ .dev_id = "imx28-dma-apbx", },
-	{ .dev_id = "80024000.dma-apbx", },
-};
-
-static struct clk_lookup ssp0_lookups[] = {
-	{ .dev_id = "imx28-mmc.0", },
-	{ .dev_id = "80010000.ssp", },
-};
-
-static struct clk_lookup ssp1_lookups[] = {
-	{ .dev_id = "imx28-mmc.1", },
-	{ .dev_id = "80012000.ssp", },
-};
-
-static struct clk_lookup ssp2_lookups[] = {
-	{ .dev_id = "imx28-mmc.2", },
-	{ .dev_id = "80014000.ssp", },
-};
-
-static struct clk_lookup ssp3_lookups[] = {
-	{ .dev_id = "imx28-mmc.3", },
-	{ .dev_id = "80016000.ssp", },
-};
-
-static struct clk_lookup lcdif_lookups[] = {
-	{ .dev_id = "imx28-fb", },
-	{ .dev_id = "80030000.lcdif", },
-};
-
-static struct clk_lookup gpmi_lookups[] = {
-	{ .dev_id = "imx28-gpmi-nand", },
-	{ .dev_id = "8000c000.gpmi-nand", },
-};
-
-static struct clk_lookup fec_lookups[] = {
-	{ .dev_id = "imx28-fec.0", },
-	{ .dev_id = "imx28-fec.1", },
-	{ .dev_id = "800f0000.ethernet", },
-	{ .dev_id = "800f4000.ethernet", },
-};
-
-static struct clk_lookup can0_lookups[] = {
-	{ .dev_id = "flexcan.0", },
-	{ .dev_id = "80032000.can", },
-};
-
-static struct clk_lookup can1_lookups[] = {
-	{ .dev_id = "flexcan.1", },
-	{ .dev_id = "80034000.can", },
-};
-
-static struct clk_lookup saif0_lookups[] = {
-	{ .dev_id = "mxs-saif.0", },
-	{ .dev_id = "80042000.saif", },
-};
-
-static struct clk_lookup saif1_lookups[] = {
-	{ .dev_id = "mxs-saif.1", },
-	{ .dev_id = "80046000.saif", },
-};
-
 static const char *sel_cpu[]  __initconst = { "ref_cpu", "ref_xtal", };
 static const char *sel_io0[]  __initconst = { "ref_io0", "ref_xtal", };
 static const char *sel_io1[]  __initconst = { "ref_io1", "ref_xtal", };
@@ -228,6 +145,7 @@ enum imx28_clk {
 };
 
 static struct clk *clks[clk_max];
+static struct clk_onecell_data clk_data;
 
 static enum imx28_clk clks_init_on[] __initdata = {
 	cpu, hbus, xbus, emi, uart,
@@ -235,6 +153,7 @@ static enum imx28_clk clks_init_on[] __initdata = {
 
 int __init mx28_clocks_init(void)
 {
+	struct device_node *np;
 	int i;
 
 	clk_misc_init();
@@ -312,27 +231,15 @@ int __init mx28_clocks_init(void)
 			return PTR_ERR(clks[i]);
 		}
 
+	np = of_find_compatible_node(NULL, NULL, "fsl,imx28-clkctrl");
+	if (np) {
+		clk_data.clks = clks;
+		clk_data.clk_num = ARRAY_SIZE(clks);
+		of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
+	}
+
 	clk_register_clkdev(clks[clk32k], NULL, "timrot");
 	clk_register_clkdev(clks[enet_out], NULL, "enet_out");
-	clk_register_clkdev(clks[pwm], NULL, "80064000.pwm");
-	clk_register_clkdevs(clks[hbus], hbus_lookups, ARRAY_SIZE(hbus_lookups));
-	clk_register_clkdevs(clks[xbus], xbus_lookups, ARRAY_SIZE(xbus_lookups));
-	clk_register_clkdevs(clks[uart], uart_lookups, ARRAY_SIZE(uart_lookups));
-	clk_register_clkdevs(clks[ssp0], ssp0_lookups, ARRAY_SIZE(ssp0_lookups));
-	clk_register_clkdevs(clks[ssp1], ssp1_lookups, ARRAY_SIZE(ssp1_lookups));
-	clk_register_clkdevs(clks[ssp2], ssp2_lookups, ARRAY_SIZE(ssp2_lookups));
-	clk_register_clkdevs(clks[ssp3], ssp3_lookups, ARRAY_SIZE(ssp3_lookups));
-	clk_register_clkdevs(clks[gpmi], gpmi_lookups, ARRAY_SIZE(gpmi_lookups));
-	clk_register_clkdevs(clks[saif0], saif0_lookups, ARRAY_SIZE(saif0_lookups));
-	clk_register_clkdevs(clks[saif1], saif1_lookups, ARRAY_SIZE(saif1_lookups));
-	clk_register_clkdevs(clks[lcdif], lcdif_lookups, ARRAY_SIZE(lcdif_lookups));
-	clk_register_clkdevs(clks[fec], fec_lookups, ARRAY_SIZE(fec_lookups));
-	clk_register_clkdevs(clks[can0], can0_lookups, ARRAY_SIZE(can0_lookups));
-	clk_register_clkdevs(clks[can1], can1_lookups, ARRAY_SIZE(can1_lookups));
-	clk_register_clkdev(clks[usb0_pwr], NULL, "8007c000.usbphy");
-	clk_register_clkdev(clks[usb1_pwr], NULL, "8007e000.usbphy");
-	clk_register_clkdev(clks[usb0], NULL, "80080000.usb");
-	clk_register_clkdev(clks[usb1], NULL, "80090000.usb");
 
 	for (i = 0; i < ARRAY_SIZE(clks_init_on); i++)
 		clk_prepare_enable(clks[clks_init_on[i]]);