ARM: keystone: clock: move K2HK SoC dependent code in separate file

This patch in general spit SoC type clock dependent code and general
clock code. Before adding keystone II Edison k2e SoC which has
slightly different dpll set, move k2hk dependent clock code to
separate clock-k2hk.c file.

Acked-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>

1 files changed, 113 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/keystone/clock-k2hk.c b/arch/arm/cpu/armv7/keystone/clock-k2hk.c
new file mode 100644
index 0000000000..96a9f72886
--- /dev/null
+++ b/arch/arm/cpu/armv7/keystone/clock-k2hk.c
@@ -0,0 +1,113 @@
+/*
+ * Keystone2: get clk rate for K2HK
+ *
+ * (C) Copyright 2012-2014
+ *     Texas Instruments Incorporated, <www.ti.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/clock_defs.h>
+
+const struct keystone_pll_regs keystone_pll_regs[] = {
+	[CORE_PLL]	= {KS2_MAINPLLCTL0, KS2_MAINPLLCTL1},
+	[PASS_PLL]	= {KS2_PASSPLLCTL0, KS2_PASSPLLCTL1},
+	[TETRIS_PLL]	= {KS2_ARMPLLCTL0, KS2_ARMPLLCTL1},
+	[DDR3A_PLL]	= {KS2_DDR3APLLCTL0, KS2_DDR3APLLCTL1},
+	[DDR3B_PLL]	= {KS2_DDR3BPLLCTL0, KS2_DDR3BPLLCTL1},
+};
+
+/**
+ * pll_freq_get - get pll frequency
+ * Fout = Fref * NF(mult) / NR(prediv) / OD
+ * @pll:	pll identifier
+ */
+static unsigned long pll_freq_get(int pll)
+{
+	unsigned long mult = 1, prediv = 1, output_div = 2;
+	unsigned long ret;
+	u32 tmp, reg;
+
+	if (pll == CORE_PLL) {
+		ret = external_clk[sys_clk];
+		if (pllctl_reg_read(pll, ctl) & PLLCTL_PLLEN) {
+			/* PLL mode */
+			tmp = __raw_readl(KS2_MAINPLLCTL0);
+			prediv = (tmp & PLL_DIV_MASK) + 1;
+			mult = (((tmp & PLLM_MULT_HI_SMASK) >> 6) |
+				(pllctl_reg_read(pll, mult) &
+				 PLLM_MULT_LO_MASK)) + 1;
+			output_div = ((pllctl_reg_read(pll, secctl) >>
+				       PLL_CLKOD_SHIFT) & PLL_CLKOD_MASK) + 1;
+
+			ret = ret / prediv / output_div * mult;
+		}
+	} else {
+		switch (pll) {
+		case PASS_PLL:
+			ret = external_clk[pa_clk];
+			reg = KS2_PASSPLLCTL0;
+			break;
+		case TETRIS_PLL:
+			ret = external_clk[tetris_clk];
+			reg = KS2_ARMPLLCTL0;
+			break;
+		case DDR3A_PLL:
+			ret = external_clk[ddr3a_clk];
+			reg = KS2_DDR3APLLCTL0;
+			break;
+		case DDR3B_PLL:
+			ret = external_clk[ddr3b_clk];
+			reg = KS2_DDR3BPLLCTL0;
+			break;
+		default:
+			return 0;
+		}
+
+		tmp = __raw_readl(reg);
+
+		if (!(tmp & PLLCTL_BYPASS)) {
+			/* Bypass disabled */
+			prediv = (tmp & PLL_DIV_MASK) + 1;
+			mult = ((tmp >> PLL_MULT_SHIFT) & PLL_MULT_MASK) + 1;
+			output_div = ((tmp >> PLL_CLKOD_SHIFT) &
+				      PLL_CLKOD_MASK) + 1;
+			ret = ((ret / prediv) * mult) / output_div;
+		}
+	}
+
+	return ret;
+}
+
+unsigned long clk_get_rate(unsigned int clk)
+{
+	switch (clk) {
+	case core_pll_clk:	return pll_freq_get(CORE_PLL);
+	case pass_pll_clk:	return pll_freq_get(PASS_PLL);
+	case tetris_pll_clk:	return pll_freq_get(TETRIS_PLL);
+	case ddr3a_pll_clk:	return pll_freq_get(DDR3A_PLL);
+	case ddr3b_pll_clk:	return pll_freq_get(DDR3B_PLL);
+	case sys_clk0_1_clk:
+	case sys_clk0_clk:	return pll_freq_get(CORE_PLL) / pll0div_read(1);
+	case sys_clk1_clk:	return pll_freq_get(CORE_PLL) / pll0div_read(2);
+	case sys_clk2_clk:	return pll_freq_get(CORE_PLL) / pll0div_read(3);
+	case sys_clk3_clk:	return pll_freq_get(CORE_PLL) / pll0div_read(4);
+	case sys_clk0_2_clk:	return clk_get_rate(sys_clk0_clk) / 2;
+	case sys_clk0_3_clk:	return clk_get_rate(sys_clk0_clk) / 3;
+	case sys_clk0_4_clk:	return clk_get_rate(sys_clk0_clk) / 4;
+	case sys_clk0_6_clk:	return clk_get_rate(sys_clk0_clk) / 6;
+	case sys_clk0_8_clk:	return clk_get_rate(sys_clk0_clk) / 8;
+	case sys_clk0_12_clk:	return clk_get_rate(sys_clk0_clk) / 12;
+	case sys_clk0_24_clk:	return clk_get_rate(sys_clk0_clk) / 24;
+	case sys_clk1_3_clk:	return clk_get_rate(sys_clk1_clk) / 3;
+	case sys_clk1_4_clk:	return clk_get_rate(sys_clk1_clk) / 4;
+	case sys_clk1_6_clk:	return clk_get_rate(sys_clk1_clk) / 6;
+	case sys_clk1_12_clk:	return clk_get_rate(sys_clk1_clk) / 12;
+	default:
+		break;
+	}
+
+	return 0;
+}