clk: mxs: replace imx23 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 imx23 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>
diff --git a/drivers/clk/mxs/clk-imx23.c b/drivers/clk/mxs/clk-imx23.c
index 844043a..9f6d155 100644
--- a/drivers/clk/mxs/clk-imx23.c
+++ b/drivers/clk/mxs/clk-imx23.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/mx23.h>
#include "clk.h"
@@ -71,44 +72,6 @@
__mxs_setl(30 << BP_FRAC_IOFRAC, FRAC);
}
-static struct clk_lookup uart_lookups[] = {
- { .dev_id = "duart", },
- { .dev_id = "mxs-auart.0", },
- { .dev_id = "mxs-auart.1", },
- { .dev_id = "8006c000.serial", },
- { .dev_id = "8006e000.serial", },
- { .dev_id = "80070000.serial", },
-};
-
-static struct clk_lookup hbus_lookups[] = {
- { .dev_id = "imx23-dma-apbh", },
- { .dev_id = "80004000.dma-apbh", },
-};
-
-static struct clk_lookup xbus_lookups[] = {
- { .dev_id = "duart", .con_id = "apb_pclk"},
- { .dev_id = "80070000.serial", .con_id = "apb_pclk"},
- { .dev_id = "imx23-dma-apbx", },
- { .dev_id = "80024000.dma-apbx", },
-};
-
-static struct clk_lookup ssp_lookups[] = {
- { .dev_id = "imx23-mmc.0", },
- { .dev_id = "imx23-mmc.1", },
- { .dev_id = "80010000.ssp", },
- { .dev_id = "80034000.ssp", },
-};
-
-static struct clk_lookup lcdif_lookups[] = {
- { .dev_id = "imx23-fb", },
- { .dev_id = "80030000.lcdif", },
-};
-
-static struct clk_lookup gpmi_lookups[] = {
- { .dev_id = "imx23-gpmi-nand", },
- { .dev_id = "8000c000.gpmi-nand", },
-};
-
static const char *sel_pll[] __initconst = { "pll", "ref_xtal", };
static const char *sel_cpu[] __initconst = { "ref_cpu", "ref_xtal", };
static const char *sel_pix[] __initconst = { "ref_pix", "ref_xtal", };
@@ -127,6 +90,7 @@
};
static struct clk *clks[clk_max];
+static struct clk_onecell_data clk_data;
static enum imx23_clk clks_init_on[] __initdata = {
cpu, hbus, xbus, emi, uart,
@@ -134,6 +98,7 @@
int __init mx23_clocks_init(void)
{
+ struct device_node *np;
int i;
clk_misc_init();
@@ -188,14 +153,14 @@
return PTR_ERR(clks[i]);
}
+ np = of_find_compatible_node(NULL, NULL, "fsl,imx23-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[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[ssp], ssp_lookups, ARRAY_SIZE(ssp_lookups));
- clk_register_clkdevs(clks[gpmi], gpmi_lookups, ARRAY_SIZE(gpmi_lookups));
- clk_register_clkdevs(clks[lcdif], lcdif_lookups, ARRAY_SIZE(lcdif_lookups));
for (i = 0; i < ARRAY_SIZE(clks_init_on); i++)
clk_prepare_enable(clks[clks_init_on[i]]);