@@ -719,9 +719,15 @@ static void __init cdce_clk_init(void)
}
}
+#define DM6467T_EVM_REF_FREQ 33000000
+
static void __init davinci_map_io(void)
{
dm646x_init();
+
+ if (machine_is_davinci_dm6467tevm())
+ davinci_set_refclk_rate(DM6467T_EVM_REF_FREQ);
+
cdce_clk_init();
}
@@ -785,17 +791,6 @@ static __init void evm_init(void)
soc_info->emac_pdata->phy_id = DM646X_EVM_PHY_ID;
}
-#define DM646X_EVM_REF_FREQ 27000000
-#define DM6467T_EVM_REF_FREQ 33000000
-
-void __init dm646x_board_setup_refclk(struct clk *clk)
-{
- if (machine_is_davinci_dm6467tevm())
- clk->rate = DM6467T_EVM_REF_FREQ;
- else
- clk->rate = DM646X_EVM_REF_FREQ;
-}
-
MACHINE_START(DAVINCI_DM6467_EVM, "DaVinci DM646x EVM")
.boot_params = (0x80000100),
.map_io = davinci_map_io,
@@ -368,6 +368,12 @@ static unsigned long clk_leafclk_recalc(struct clk *clk)
return clk->parent->rate;
}
+int davinci_simple_set_rate(struct clk *clk, unsigned long rate)
+{
+ clk->rate = rate;
+ return 0;
+}
+
static unsigned long clk_pllclk_recalc(struct clk *clk)
{
u32 ctrl, mult = 1, prediv = 1, postdiv = 1;
@@ -506,6 +512,38 @@ int davinci_set_pllrate(struct pll_data *pll, unsigned int prediv,
}
EXPORT_SYMBOL(davinci_set_pllrate);
+/**
+ * davinci_set_refclk_rate() - Set the reference clock rate
+ * @rate: The new rate.
+ *
+ * Sets the reference clock rate to a given value. This will most likely
+ * result in the entire clock tree getting updated.
+ *
+ * This is used to support boards which use a reference clock different
+ * than that used by default in <soc>.c file. The reference clock rate
+ * should be updated early in the boot process; ideally soon after the
+ * clock tree has been initialized once with the default reference clock
+ * rate (davinci_common_init()).
+ *
+ * Returns 0 on success, error otherwise.
+ */
+int davinci_set_refclk_rate(unsigned long rate)
+{
+ struct clk *refclk;
+
+ refclk = clk_get(NULL, "ref");
+ if (IS_ERR(refclk)) {
+ pr_err("%s: failed to get reference clock.\n", __func__);
+ return PTR_ERR(refclk);
+ }
+
+ clk_set_rate(refclk, rate);
+
+ clk_put(refclk);
+
+ return 0;
+}
+
int __init davinci_clk_init(struct clk_lookup *clocks)
{
struct clk_lookup *c;
@@ -123,6 +123,8 @@ int davinci_clk_init(struct clk_lookup *clocks);
int davinci_set_pllrate(struct pll_data *pll, unsigned int prediv,
unsigned int mult, unsigned int postdiv);
int davinci_set_sysclk_rate(struct clk *clk, unsigned long rate);
+int davinci_set_refclk_rate(unsigned long rate);
+int davinci_simple_set_rate(struct clk *clk, unsigned long rate);
extern struct platform_device davinci_wdt_device;
extern void davinci_watchdog_reset(struct platform_device *);
@@ -42,6 +42,7 @@
/*
* Device specific clocks
*/
+#define DM646X_REF_FREQ 27000000
#define DM646X_AUX_FREQ 24000000
static struct pll_data pll1_data = {
@@ -56,6 +57,8 @@ static struct pll_data pll2_data = {
static struct clk ref_clk = {
.name = "ref_clk",
+ .rate = DM646X_REF_FREQ,
+ .set_rate = davinci_simple_set_rate,
};
static struct clk aux_clkin = {
@@ -901,7 +904,6 @@ int __init dm646x_init_edma(struct edma_rsv_info *rsv)
void __init dm646x_init(void)
{
- dm646x_board_setup_refclk(&ref_clk);
davinci_common_init(&davinci_soc_info_dm646x);
}
@@ -15,7 +15,6 @@
#include <mach/asp.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
-#include <linux/clk.h>
#include <linux/davinci_emac.h>
#define DM646X_EMAC_BASE (0x01C80000)
@@ -31,7 +30,6 @@
void __init dm646x_init(void);
void __init dm646x_init_mcasp0(struct snd_platform_data *pdata);
void __init dm646x_init_mcasp1(struct snd_platform_data *pdata);
-void __init dm646x_board_setup_refclk(struct clk *clk);
int __init dm646x_init_edma(struct edma_rsv_info *rsv);
void dm646x_video_init(void);