tegra20: add clock_set_pllout function
Common practice on Tegra 2 boards is to use the pllp_out4 FO
to generate the ULPI reference clock. For this to work we have
to override the default hardware generated output divider.
This function adds a clean way to do so.
Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/arch/arm/include/asm/arch-tegra/clk_rst.h b/arch/arm/include/asm/arch-tegra/clk_rst.h
index 8c3be91..7b548c2 100644
--- a/arch/arm/include/asm/arch-tegra/clk_rst.h
+++ b/arch/arm/include/asm/arch-tegra/clk_rst.h
@@ -27,8 +27,7 @@
/* PLL registers - there are several PLLs in the clock controller */
struct clk_pll {
uint pll_base; /* the control register */
- uint pll_out; /* output control */
- uint reserved;
+ uint pll_out[2]; /* output control */
uint pll_misc; /* other misc things */
};
@@ -112,6 +111,14 @@
#define PLL_DIVM_SHIFT 0
#define PLL_DIVM_MASK (0x1f << PLL_DIVM_SHIFT)
+/* CLK_RST_CONTROLLER_PLLx_OUTx_0 */
+#define PLL_OUT_RSTN (1 << 0)
+#define PLL_OUT_CLKEN (1 << 1)
+#define PLL_OUT_OVRRIDE (1 << 2)
+
+#define PLL_OUT_RATIO_SHIFT 8
+#define PLL_OUT_RATIO_MASK (0xffU << PLL_OUT_RATIO_SHIFT)
+
/* CLK_RST_CONTROLLER_PLLx_MISC_0 */
#define PLL_CPCON_SHIFT 8
#define PLL_CPCON_MASK (15U << PLL_CPCON_SHIFT)