TI DA8xx: Add DA8xx cpu functions
Provides initial support for TI OMAP-L1x/DA8xx SoC devices.
See http://www.ti.com
Provides:
Low level initialisation.
System clock API.
Timer control.
Signed-off-by: Nick Thompson <nick.thompson@gefanuc.com>
diff --git a/cpu/arm926ejs/davinci/cpu.c b/cpu/arm926ejs/davinci/cpu.c
index 390cab8..fc3551c 100644
--- a/cpu/arm926ejs/davinci/cpu.c
+++ b/cpu/arm926ejs/davinci/cpu.c
@@ -23,7 +23,7 @@
#include <common.h>
#include <netdev.h>
#include <asm/arch/hardware.h>
-
+#include <asm/io.h>
/* offsets from PLL controller base */
#define PLLC_PLLCTL 0x100
@@ -60,6 +60,54 @@
#define DDR_PLLDIV PLLC_PLLDIV1
#endif
+#ifdef CONFIG_SOC_DA8XX
+const dv_reg * const sysdiv[7] = {
+ &davinci_pllc_regs->plldiv1, &davinci_pllc_regs->plldiv2,
+ &davinci_pllc_regs->plldiv3, &davinci_pllc_regs->plldiv4,
+ &davinci_pllc_regs->plldiv5, &davinci_pllc_regs->plldiv6,
+ &davinci_pllc_regs->plldiv7
+};
+
+int clk_get(enum davinci_clk_ids id)
+{
+ int pre_div;
+ int pllm;
+ int post_div;
+ int pll_out;
+
+ pll_out = CONFIG_SYS_OSCIN_FREQ;
+
+ if (id == DAVINCI_AUXCLK_CLKID)
+ goto out;
+
+ /*
+ * Lets keep this simple. Combining operations can result in
+ * unexpected approximations
+ */
+ pre_div = (readl(&davinci_pllc_regs->prediv) &
+ DAVINCI_PLLC_DIV_MASK) + 1;
+ pllm = readl(&davinci_pllc_regs->pllm) + 1;
+
+ pll_out /= pre_div;
+ pll_out *= pllm;
+
+ if (id == DAVINCI_PLLM_CLKID)
+ goto out;
+
+ post_div = (readl(&davinci_pllc_regs->postdiv) &
+ DAVINCI_PLLC_DIV_MASK) + 1;
+
+ pll_out /= post_div;
+
+ if (id == DAVINCI_PLLC_CLKID)
+ goto out;
+
+ pll_out /= (readl(sysdiv[id - 1]) & DAVINCI_PLLC_DIV_MASK) + 1;
+
+out:
+ return pll_out;
+}
+#endif /* CONFIG_SOC_DA8XX */
#ifdef CONFIG_DISPLAY_CPUINFO