Merge branch 'master' of git://git.denx.de/u-boot-microblaze

[karo-tx-uboot.git] / arch / arm / include / asm / arch-tegra2 / clock.h

diff --git a/arch/arm/include/asm/arch-tegra2/clock.h b/arch/arm/include/asm/arch-tegra2/clock.h
index 080ef18e81dec2602f031ad10f4745cfdbe3c4f0..ff83bbf2938c6b2e2d6ebb6fcee577fc80750620 100644 (file)
--- a/arch/arm/include/asm/arch-tegra2/clock.h
+++ b/arch/arm/include/asm/arch-tegra2/clock.h
@@ -177,6 +177,7 @@ enum periph_id {
        PERIPH_ID_CRAM2,
 
        PERIPH_ID_COUNT,
+       PERIPH_ID_NONE = -1,
 };
 
 /* Converts a clock number to a clock register: 0=L, 1=H, 2=U */
@@ -185,8 +186,9 @@ enum periph_id {
 /* Mask value for a clock (within PERIPH_REG(id)) */
 #define PERIPH_MASK(id) (1 << ((id) & 0x1f))
 
-/* return 1 if a PLL ID is in range */
-#define clock_id_isvalid(id) ((id) >= CLOCK_ID_FIRST && (id) < CLOCK_ID_COUNT)
+/* return 1 if a PLL ID is in range, and not a simple PLL */
+#define clock_id_is_pll(id) ((id) >= CLOCK_ID_FIRST && \
+               (id) < CLOCK_ID_FIRST_SIMPLE)
 
 /* PLL stabilization delay in usec */
 #define CLOCK_PLL_STABLE_DELAY_US 300
@@ -209,6 +211,21 @@ enum clock_osc_freq clock_get_osc_freq(void);
 unsigned long clock_start_pll(enum clock_id id, u32 divm, u32 divn,
                u32 divp, u32 cpcon, u32 lfcon);
 
+/**
+ * Read low-level parameters of a PLL.
+ *
+ * @param id   clock id to read (note: USB is not supported)
+ * @param divm returns input divider
+ * @param divn returns feedback divider
+ * @param divp returns post divider 2^n
+ * @param cpcon        returns charge pump setup control
+ * @param lfcon        returns loop filter setup control
+ *
+ * @returns 0 if ok, -1 on error (invalid clock id)
+ */
+int clock_ll_read_pll(enum clock_id clkid, u32 *divm, u32 *divn,
+                     u32 *divp, u32 *cpcon, u32 *lfcon);
+
 /*
  * Enable a clock
  *
@@ -355,6 +372,25 @@ unsigned clock_get_rate(enum clock_id clkid);
  */
 void clock_ll_start_uart(enum periph_id periph_id);
 
+/**
+ * Decode a peripheral ID from a device tree node.
+ *
+ * This works by looking up the peripheral's 'clocks' node and reading out
+ * the second cell, which is the clock number / peripheral ID.
+ *
+ * @param blob         FDT blob to use
+ * @param node         Node to look at
+ * @return peripheral ID, or PERIPH_ID_NONE if none
+ */
+enum periph_id clock_decode_periph_id(const void *blob, int node);
+
+/**
+ * Checks if the oscillator bypass is enabled (XOBP bit)
+ *
+ * @return 1 if bypass is enabled, 0 if not
+ */
+int clock_get_osc_bypass(void);
+
 /*
  * Checks that clocks are valid and prints a warning if not
  *