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author | Wang Huan <b18965@freescale.com> | 2014-09-05 13:52:34 +0800 |
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committer | York Sun <yorksun@freescale.com> | 2014-09-08 10:30:32 -0700 |
commit | d60a2099a20254b33a314895a4b5e6a21aebd135 (patch) | |
tree | 2fb79855edd6466a89c84cc4ce6210802aa75d06 /arch/arm/cpu/armv7/ls102xa/clock.c | |
parent | d6c1ffc7d23f4fe4ae8c91101861055b8e1501b6 (diff) | |
download | u-boot-imx-d60a2099a20254b33a314895a4b5e6a21aebd135.zip u-boot-imx-d60a2099a20254b33a314895a4b5e6a21aebd135.tar.gz u-boot-imx-d60a2099a20254b33a314895a4b5e6a21aebd135.tar.bz2 |
arm: ls102xa: Add Freescale LS102xA SoC support
The QorIQ LS1 family is built on Layerscape architecture,
the industry's first software-aware, core-agnostic networking
architecture to offer unprecedented efficiency and scale.
Freescale LS102xA is a set of SoCs combines two ARM
Cortex-A7 cores that have been optimized for high
reliability and pack the highest level of integration
available for sub-3 W embedded communications processors
with Layerscape architecture and with a comprehensive
enablement model focused on ease of programmability.
Signed-off-by: Alison Wang <alison.wang@freescale.com>
Signed-off-by: Jason Jin <jason.jin@freescale.com>
Signed-off-by: Jingchang Lu <jingchang.lu@freescale.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Diffstat (limited to 'arch/arm/cpu/armv7/ls102xa/clock.c')
-rw-r--r-- | arch/arm/cpu/armv7/ls102xa/clock.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/ls102xa/clock.c b/arch/arm/cpu/armv7/ls102xa/clock.c new file mode 100644 index 0000000..8f80c61 --- /dev/null +++ b/arch/arm/cpu/armv7/ls102xa/clock.c @@ -0,0 +1,130 @@ +/* + * Copyright 2014 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/immap_ls102xa.h> +#include <asm/arch/clock.h> +#include <fsl_ifc.h> + +DECLARE_GLOBAL_DATA_PTR; + +#ifndef CONFIG_SYS_FSL_NUM_CC_PLLS +#define CONFIG_SYS_FSL_NUM_CC_PLLS 2 +#endif + +void get_sys_info(struct sys_info *sys_info) +{ + struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR); +#ifdef CONFIG_FSL_IFC + struct fsl_ifc *ifc_regs = (void *)CONFIG_SYS_IFC_ADDR; + u32 ccr; +#endif + struct ccsr_clk *clk = (void *)(CONFIG_SYS_FSL_LS1_CLK_ADDR); + unsigned int cpu; + const u8 core_cplx_pll[6] = { + [0] = 0, /* CC1 PPL / 1 */ + [1] = 0, /* CC1 PPL / 2 */ + [4] = 1, /* CC2 PPL / 1 */ + [5] = 1, /* CC2 PPL / 2 */ + }; + + const u8 core_cplx_pll_div[6] = { + [0] = 1, /* CC1 PPL / 1 */ + [1] = 2, /* CC1 PPL / 2 */ + [4] = 1, /* CC2 PPL / 1 */ + [5] = 2, /* CC2 PPL / 2 */ + }; + + uint i; + uint freq_c_pll[CONFIG_SYS_FSL_NUM_CC_PLLS]; + uint ratio[CONFIG_SYS_FSL_NUM_CC_PLLS]; + unsigned long sysclk = CONFIG_SYS_CLK_FREQ; + + sys_info->freq_systembus = sysclk; +#ifdef CONFIG_DDR_CLK_FREQ + sys_info->freq_ddrbus = CONFIG_DDR_CLK_FREQ; +#else + sys_info->freq_ddrbus = sysclk; +#endif + + sys_info->freq_systembus *= (in_be32(&gur->rcwsr[0]) >> + RCWSR0_SYS_PLL_RAT_SHIFT) & RCWSR0_SYS_PLL_RAT_MASK; + sys_info->freq_ddrbus *= (in_be32(&gur->rcwsr[0]) >> + RCWSR0_MEM_PLL_RAT_SHIFT) & RCWSR0_MEM_PLL_RAT_MASK; + + for (i = 0; i < CONFIG_SYS_FSL_NUM_CC_PLLS; i++) { + ratio[i] = (in_be32(&clk->pllcgsr[i].pllcngsr) >> 1) & 0x3f; + if (ratio[i] > 4) + freq_c_pll[i] = sysclk * ratio[i]; + else + freq_c_pll[i] = sys_info->freq_systembus * ratio[i]; + } + + for (cpu = 0; cpu < CONFIG_MAX_CPUS; cpu++) { + u32 c_pll_sel = (in_be32(&clk->clkcsr[cpu].clkcncsr) >> 27) + & 0xf; + u32 cplx_pll = core_cplx_pll[c_pll_sel]; + + sys_info->freq_processor[cpu] = + freq_c_pll[cplx_pll] / core_cplx_pll_div[c_pll_sel]; + } + +#if defined(CONFIG_FSL_IFC) + ccr = in_be32(&ifc_regs->ifc_ccr); + ccr = ((ccr & IFC_CCR_CLK_DIV_MASK) >> IFC_CCR_CLK_DIV_SHIFT) + 1; + + sys_info->freq_localbus = sys_info->freq_systembus / ccr; +#endif +} + +int get_clocks(void) +{ + struct sys_info sys_info; + + get_sys_info(&sys_info); + gd->cpu_clk = sys_info.freq_processor[0]; + gd->bus_clk = sys_info.freq_systembus; + gd->mem_clk = sys_info.freq_ddrbus * 2; + +#if defined(CONFIG_FSL_ESDHC) + gd->arch.sdhc_clk = gd->bus_clk; +#endif + + return 0; +} + +ulong get_bus_freq(ulong dummy) +{ + return gd->bus_clk; +} + +ulong get_ddr_freq(ulong dummy) +{ + return gd->mem_clk; +} + +int get_serial_clock(void) +{ + return gd->bus_clk / 2; +} + +unsigned int mxc_get_clock(enum mxc_clock clk) +{ + switch (clk) { + case MXC_I2C_CLK: + return get_bus_freq(0) / 2; + case MXC_ESDHC_CLK: + return get_bus_freq(0); + case MXC_DSPI_CLK: + return get_bus_freq(0) / 2; + case MXC_UART_CLK: + return get_bus_freq(0) / 2; + default: + printf("Unsupported clock\n"); + } + return 0; +} |