[U-Boot] [PATCH] da8xx: add support for multiple PLL controllers

[nagabhushana.netagunte at ti.com]

From: Sudhakar Rajashekhara <sudhakar.raj at ti.com>

Add support for multiple PLL controllers  and in the process,
modify the clk_get() to work for multiple PLL controllers.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj at ti.com>
Signed-off-by: Nagabhushana Netagunte <nagabhushana.netagunte at ti.com>
---
 arch/arm/cpu/arm926ejs/davinci/cpu.c         |   27 +++++++++++++++----------
 arch/arm/include/asm/arch-davinci/hardware.h |    1 +
 2 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/arch/arm/cpu/arm926ejs/davinci/cpu.c b/arch/arm/cpu/arm926ejs/davinci/cpu.c
index 8b57205..3ab56c7 100644
--- a/arch/arm/cpu/arm926ejs/davinci/cpu.c
+++ b/arch/arm/cpu/arm926ejs/davinci/cpu.c
@@ -37,6 +37,7 @@
 #define PLLC_PLLDIV4	0x160
 #define PLLC_PLLDIV5	0x164
 #define PLLC_PLLDIV6	0x168
+#define PLLC_PLLDIV7	0x16c
 #define PLLC_PLLDIV8	0x170
 #define PLLC_PLLDIV9	0x174
 
@@ -61,11 +62,9 @@
 #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
+unsigned int sysdiv[9] = {
+	PLLC_PLLDIV1, PLLC_PLLDIV2, PLLC_PLLDIV3, PLLC_PLLDIV4, PLLC_PLLDIV5,
+	PLLC_PLLDIV6, PLLC_PLLDIV7, PLLC_PLLDIV8, PLLC_PLLDIV9
 };
 
 int clk_get(enum davinci_clk_ids id)
@@ -74,19 +73,26 @@ int clk_get(enum davinci_clk_ids id)
 	int pllm;
 	int post_div;
 	int pll_out;
+	volatile unsigned int pll_base;
 
 	pll_out = CONFIG_SYS_OSCIN_FREQ;
 
 	if (id == DAVINCI_AUXCLK_CLKID)
 		goto out;
 
+	if ((id >> 16) == 1)
+		pll_base = DAVINCI_PLL_CNTRL1_BASE;
+	else
+		pll_base = DAVINCI_PLL_CNTRL0_BASE;
+
+	id &= 0xFFFF;
+
 	/*
 	 * 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;
+	pre_div = (REG(pll_base + PLLC_PREDIV) & 0xff) + 1;
+	pllm = REG(pll_base + PLLC_PLLM) + 1;
 
 	pll_out /= pre_div;
 	pll_out *= pllm;
@@ -94,15 +100,14 @@ int clk_get(enum davinci_clk_ids id)
 	if (id == DAVINCI_PLLM_CLKID)
 		goto out;
 
-	post_div = (readl(&davinci_pllc_regs->postdiv) &
-		    DAVINCI_PLLC_DIV_MASK) + 1;
+	post_div = (REG(pll_base + PLLC_POSTDIV) & 0xff) + 1;
 
 	pll_out /= post_div;
 
 	if (id == DAVINCI_PLLC_CLKID)
 		goto out;
 
-	pll_out /= (readl(sysdiv[id - 1]) & DAVINCI_PLLC_DIV_MASK) + 1;
+	pll_out /= (REG(pll_base + sysdiv[id - 1]) & 0xff) + 1;
 
 out:
 	return pll_out;
diff --git a/arch/arm/include/asm/arch-davinci/hardware.h b/arch/arm/include/asm/arch-davinci/hardware.h
index df3f549..d2b2989 100644
--- a/arch/arm/include/asm/arch-davinci/hardware.h
+++ b/arch/arm/include/asm/arch-davinci/hardware.h
@@ -129,6 +129,7 @@ typedef volatile unsigned int *	dv_reg_p;
 #define DAVINCI_TIMER1_BASE			0x01c21000
 #define DAVINCI_WDOG_BASE			0x01c21000
 #define DAVINCI_PLL_CNTRL0_BASE			0x01c11000
+#define DAVINCI_PLL_CNTRL1_BASE			0x01e1a000
 #define DAVINCI_PSC0_BASE			0x01c10000
 #define DAVINCI_PSC1_BASE			0x01e27000
 #define DAVINCI_SPI0_BASE			0x01c41000
-- 
1.6.2.4