ARM: i.MX5: Allow DT clock providers
Currently clock providers defined in the DT are not registered
on i.MX5 platforms since of_clk_init() is not called.
This is not a problem for the SOC's own clocks, which are registered
in code, but prevents the DT being used to define clocks for external
hardware.
Fix this by calling of_clk_init() and actually using the DT to obtain
the 4 SOC fixed clocks.
These are already defined in the DT but were previously just used to
manually obtain the rate.
Fall back to the old scheme for non DT platforms.
Since the same method may be useful for other i.MX platforms
implement the imx_obtain_fixed_clock() function in common code.
Actually changing other i.MX platforms to use this should be done
later by someone with access to the appropriate hardware.
Signed-off-by: Martin Fuzzey <mfuzzey@parkeon.com>
Tested-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
diff --git a/arch/arm/mach-imx/clk-imx51-imx53.c b/arch/arm/mach-imx/clk-imx51-imx53.c
index 6fc486b..9297627 100644
--- a/arch/arm/mach-imx/clk-imx51-imx53.c
+++ b/arch/arm/mach-imx/clk-imx51-imx53.c
@@ -123,11 +123,13 @@
{
int i;
+ of_clk_init(NULL);
+
clk[dummy] = imx_clk_fixed("dummy", 0);
- clk[ckil] = imx_clk_fixed("ckil", rate_ckil);
- clk[osc] = imx_clk_fixed("osc", rate_osc);
- clk[ckih1] = imx_clk_fixed("ckih1", rate_ckih1);
- clk[ckih2] = imx_clk_fixed("ckih2", rate_ckih2);
+ clk[ckil] = imx_obtain_fixed_clock("ckil", rate_ckil);
+ clk[osc] = imx_obtain_fixed_clock("osc", rate_osc);
+ clk[ckih1] = imx_obtain_fixed_clock("ckih1", rate_ckih1);
+ clk[ckih2] = imx_obtain_fixed_clock("ckih2", rate_ckih2);
clk[lp_apm] = imx_clk_mux("lp_apm", MXC_CCM_CCSR, 9, 1,
lp_apm_sel, ARRAY_SIZE(lp_apm_sel));
@@ -542,42 +544,12 @@
return 0;
}
-#ifdef CONFIG_OF
-static void __init clk_get_freq_dt(unsigned long *ckil, unsigned long *osc,
- unsigned long *ckih1, unsigned long *ckih2)
-{
- struct device_node *np;
-
- /* retrieve the freqency of fixed clocks from device tree */
- for_each_compatible_node(np, NULL, "fixed-clock") {
- u32 rate;
- if (of_property_read_u32(np, "clock-frequency", &rate))
- continue;
-
- if (of_device_is_compatible(np, "fsl,imx-ckil"))
- *ckil = rate;
- else if (of_device_is_compatible(np, "fsl,imx-osc"))
- *osc = rate;
- else if (of_device_is_compatible(np, "fsl,imx-ckih1"))
- *ckih1 = rate;
- else if (of_device_is_compatible(np, "fsl,imx-ckih2"))
- *ckih2 = rate;
- }
-}
-
int __init mx51_clocks_init_dt(void)
{
- unsigned long ckil, osc, ckih1, ckih2;
-
- clk_get_freq_dt(&ckil, &osc, &ckih1, &ckih2);
- return mx51_clocks_init(ckil, osc, ckih1, ckih2);
+ return mx51_clocks_init(0, 0, 0, 0);
}
int __init mx53_clocks_init_dt(void)
{
- unsigned long ckil, osc, ckih1, ckih2;
-
- clk_get_freq_dt(&ckil, &osc, &ckih1, &ckih2);
- return mx53_clocks_init(ckil, osc, ckih1, ckih2);
+ return mx53_clocks_init(0, 0, 0, 0);
}
-#endif