[U-Boot] [U-boot] [Patch 2/6] ARM: keystone2: clock: add K2E clock support
Ivan Khoronzhuk
ivan.khoronzhuk at ti.com
Tue Jul 15 23:59:23 CEST 2014
From: Hao Zhang <hzhang at ti.com>
This patch adds clock definitions and commands to support Keystone2
K2E SOC.
Signed-off-by: Hao Zhang <hzhang at ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk at ti.com>
---
arch/arm/cpu/armv7/keystone/Makefile | 1 +
arch/arm/cpu/armv7/keystone/clock-k2e.c | 101 +++++++++++++++++++++++++
arch/arm/cpu/armv7/keystone/clock.c | 2 +
arch/arm/cpu/armv7/keystone/cmd_clock.c | 31 ++++++--
arch/arm/include/asm/arch-keystone/clock-k2e.h | 68 +++++++++++++++++
arch/arm/include/asm/arch-keystone/clock.h | 4 +
include/configs/ks2_evm.h | 2 +-
7 files changed, 203 insertions(+), 6 deletions(-)
create mode 100644 arch/arm/cpu/armv7/keystone/clock-k2e.c
create mode 100644 arch/arm/include/asm/arch-keystone/clock-k2e.h
diff --git a/arch/arm/cpu/armv7/keystone/Makefile b/arch/arm/cpu/armv7/keystone/Makefile
index 74c5160..f8519c0 100644
--- a/arch/arm/cpu/armv7/keystone/Makefile
+++ b/arch/arm/cpu/armv7/keystone/Makefile
@@ -9,6 +9,7 @@ obj-y += init.o
obj-y += psc.o
obj-y += clock.o
obj-$(CONFIG_SOC_K2HK) += clock-k2hk.o
+obj-$(CONFIG_SOC_K2E) += clock-k2e.o
obj-y += cmd_clock.o
obj-y += cmd_mon.o
obj-$(CONFIG_DRIVER_TI_KEYSTONE_NET) += keystone_nav.o
diff --git a/arch/arm/cpu/armv7/keystone/clock-k2e.c b/arch/arm/cpu/armv7/keystone/clock-k2e.c
new file mode 100644
index 0000000..42092e1
--- /dev/null
+++ b/arch/arm/cpu/armv7/keystone/clock-k2e.c
@@ -0,0 +1,101 @@
+/*
+ * Keystone2: get clk rate for K2E
+ *
+ * (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},
+ [DDR3_PLL] = {KS2_DDR3APLLCTL0, KS2_DDR3APLLCTL1},
+};
+
+/**
+ * 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 DDR3_PLL:
+ ret = external_clk[ddr3_clk];
+ reg = KS2_DDR3APLLCTL0;
+ 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 ddr3_pll_clk: return pll_freq_get(DDR3_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;
+}
diff --git a/arch/arm/cpu/armv7/keystone/clock.c b/arch/arm/cpu/armv7/keystone/clock.c
index 42b664b..03c1d9f 100644
--- a/arch/arm/cpu/armv7/keystone/clock.c
+++ b/arch/arm/cpu/armv7/keystone/clock.c
@@ -106,6 +106,7 @@ void init_pll(const struct pll_init_data *data)
tmp = pllctl_reg_setbits(data->pll, ctl, PLLCTL_PLLEN);
+#ifndef CONFIG_SOC_K2E
} else if (data->pll == TETRIS_PLL) {
bwadj = pllm >> 1;
/* 1.5 Set PLLCTL0[BYPASS] =1 (enable bypass), */
@@ -156,6 +157,7 @@ void init_pll(const struct pll_init_data *data)
* only applicable for Kepler
*/
setbits_le32(KS2_MISC_CTRL, KS2_ARM_PLL_EN);
+#endif
} else {
setbits_le32(keystone_pll_regs[data->pll].reg1, PLLCTL_ENSAT);
/*
diff --git a/arch/arm/cpu/armv7/keystone/cmd_clock.c b/arch/arm/cpu/armv7/keystone/cmd_clock.c
index afd30f3..d97c95b 100644
--- a/arch/arm/cpu/armv7/keystone/cmd_clock.c
+++ b/arch/arm/cpu/armv7/keystone/cmd_clock.c
@@ -14,10 +14,10 @@
#include <asm/arch/psc_defs.h>
struct pll_init_data cmd_pll_data = {
- .pll = MAIN_PLL,
- .pll_m = 16,
- .pll_d = 1,
- .pll_od = 2,
+ .pll = MAIN_PLL,
+ .pll_m = 16,
+ .pll_d = 1,
+ .pll_od = 2,
};
int do_pll_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
@@ -27,12 +27,19 @@ int do_pll_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
if (strncmp(argv[1], "pa", 2) == 0)
cmd_pll_data.pll = PASS_PLL;
+#ifndef CONFIG_SOC_K2E
else if (strncmp(argv[1], "arm", 3) == 0)
cmd_pll_data.pll = TETRIS_PLL;
+#endif
+#ifdef CONFIG_SOC_K2HK
else if (strncmp(argv[1], "ddr3a", 5) == 0)
cmd_pll_data.pll = DDR3A_PLL;
else if (strncmp(argv[1], "ddr3b", 5) == 0)
cmd_pll_data.pll = DDR3B_PLL;
+#else
+ else if (strncmp(argv[1], "ddr3", 4) == 0)
+ cmd_pll_data.pll = DDR3_PLL;
+#endif
else
goto pll_cmd_usage;
@@ -51,11 +58,20 @@ pll_cmd_usage:
return cmd_usage(cmdtp);
}
+#ifdef CONFIG_SOC_K2HK
U_BOOT_CMD(
pllset, 5, 0, do_pll_cmd,
"set pll multiplier and pre divider",
"<pa|arm|ddr3a|ddr3b> <mult> <div> <OD>\n"
);
+#endif
+#ifdef CONFIG_SOC_K2E
+U_BOOT_CMD(
+ pllset, 5, 0, do_pll_cmd,
+ "set pll multiplier and pre divider",
+ "<pa|ddr3> <mult> <div> <OD>\n"
+);
+#endif
int do_getclk_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
@@ -79,7 +95,12 @@ U_BOOT_CMD(
getclk, 2, 0, do_getclk_cmd,
"get clock rate",
"<clk index>\n"
- "See the 'enum clk_e' in the k2hk clock.h for clk indexes\n"
+#ifdef CONFIG_SOC_K2HK
+ "See the 'enum clk_e' in the clock-k2hk.h for clk indexes\n"
+#endif
+#ifdef CONFIG_SOC_K2E
+ "See the 'enum clk_e' in the clock-k2e.h for clk indexes\n"
+#endif
);
int do_psc_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
diff --git a/arch/arm/include/asm/arch-keystone/clock-k2e.h b/arch/arm/include/asm/arch-keystone/clock-k2e.h
new file mode 100644
index 0000000..4147811
--- /dev/null
+++ b/arch/arm/include/asm/arch-keystone/clock-k2e.h
@@ -0,0 +1,68 @@
+/*
+ * K2E: Clock management APIs
+ *
+ * (C) Copyright 2012-2014
+ * Texas Instruments Incorporated, <www.ti.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __ASM_ARCH_CLOCK_K2E_H
+#define __ASM_ARCH_CLOCK_K2E_H
+
+enum ext_clk_e {
+ sys_clk,
+ alt_core_clk,
+ pa_clk,
+ ddr3_clk,
+ mcm_clk,
+ pcie_clk,
+ sgmii_clk,
+ xgmii_clk,
+ usb_clk,
+ ext_clk_count /* number of external clocks */
+};
+
+extern unsigned int external_clk[ext_clk_count];
+
+enum clk_e {
+ core_pll_clk,
+ pass_pll_clk,
+ ddr3_pll_clk,
+ sys_clk0_clk,
+ sys_clk0_1_clk,
+ sys_clk0_2_clk,
+ sys_clk0_3_clk,
+ sys_clk0_4_clk,
+ sys_clk0_6_clk,
+ sys_clk0_8_clk,
+ sys_clk0_12_clk,
+ sys_clk0_24_clk,
+ sys_clk1_clk,
+ sys_clk1_3_clk,
+ sys_clk1_4_clk,
+ sys_clk1_6_clk,
+ sys_clk1_12_clk,
+ sys_clk2_clk,
+ sys_clk3_clk
+};
+
+#define KS2_CLK1_6 sys_clk0_6_clk
+
+/* PLL identifiers */
+enum pll_type_e {
+ CORE_PLL,
+ PASS_PLL,
+ DDR3_PLL,
+};
+
+#define CORE_PLL_800 {CORE_PLL, 16, 1, 2}
+#define CORE_PLL_1000 {CORE_PLL, 20, 1, 2}
+#define CORE_PLL_1200 {CORE_PLL, 24, 1, 2}
+#define PASS_PLL_1000 {PASS_PLL, 20, 1, 2}
+#define DDR3_PLL_200 {DDR3_PLL, 4, 1, 2}
+#define DDR3_PLL_400 {DDR3_PLL, 16, 1, 4}
+#define DDR3_PLL_800 {DDR3_PLL, 16, 1, 2}
+#define DDR3_PLL_333 {DDR3_PLL, 20, 1, 6}
+
+#endif
diff --git a/arch/arm/include/asm/arch-keystone/clock.h b/arch/arm/include/asm/arch-keystone/clock.h
index c7da352..1513c76 100644
--- a/arch/arm/include/asm/arch-keystone/clock.h
+++ b/arch/arm/include/asm/arch-keystone/clock.h
@@ -16,6 +16,10 @@
#include <asm/arch/clock-k2hk.h>
#endif
+#ifdef CONFIG_SOC_K2E
+#include <asm/arch/clock-k2e.h>
+#endif
+
#define MAIN_PLL CORE_PLL
#include <asm/types.h>
diff --git a/include/configs/ks2_evm.h b/include/configs/ks2_evm.h
index 29f0b9b..43db581 100644
--- a/include/configs/ks2_evm.h
+++ b/include/configs/ks2_evm.h
@@ -80,7 +80,7 @@
#define CONFIG_SPI_FLASH_STMICRO
#define CONFIG_DAVINCI_SPI
#define CONFIG_CMD_SPI
-#define CONFIG_SYS_SPI_CLK clk_get_rate(KS2_LPSC_EMIF25_SPI)
+#define CONFIG_SYS_SPI_CLK clk_get_rate(KS2_CLK1_6)
#define CONFIG_SF_DEFAULT_SPEED 30000000
#define CONFIG_ENV_SPI_MAX_HZ CONFIG_SF_DEFAULT_SPEED
#define CONFIG_SYS_SPI0
--
1.8.3.2
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