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adadc915b3
imx_get_fecclk() returns enet_ref instead of ipg. Since the clock is used to calculate the prescaler for the MDIO interface wrong values can be calculated. Tested on a custom MX6S board with 100MBit interface Signed-off-by: Markus Niebel <Markus.Niebel@tqs.de>
590 lines
14 KiB
C
590 lines
14 KiB
C
/*
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* Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <div64.h>
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#include <asm/io.h>
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#include <asm/errno.h>
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#include <asm/arch/imx-regs.h>
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#include <asm/arch/crm_regs.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/sys_proto.h>
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enum pll_clocks {
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PLL_SYS, /* System PLL */
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PLL_BUS, /* System Bus PLL*/
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PLL_USBOTG, /* OTG USB PLL */
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PLL_ENET, /* ENET PLL */
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};
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struct mxc_ccm_reg *imx_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
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#ifdef CONFIG_MXC_OCOTP
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void enable_ocotp_clk(unsigned char enable)
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{
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u32 reg;
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reg = __raw_readl(&imx_ccm->CCGR2);
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if (enable)
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reg |= MXC_CCM_CCGR2_OCOTP_CTRL_MASK;
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else
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reg &= ~MXC_CCM_CCGR2_OCOTP_CTRL_MASK;
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__raw_writel(reg, &imx_ccm->CCGR2);
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}
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#endif
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void enable_usboh3_clk(unsigned char enable)
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{
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u32 reg;
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reg = __raw_readl(&imx_ccm->CCGR6);
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if (enable)
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reg |= MXC_CCM_CCGR6_USBOH3_MASK;
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else
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reg &= ~(MXC_CCM_CCGR6_USBOH3_MASK);
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__raw_writel(reg, &imx_ccm->CCGR6);
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}
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#ifdef CONFIG_SYS_I2C_MXC
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/* i2c_num can be from 0 - 2 */
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int enable_i2c_clk(unsigned char enable, unsigned i2c_num)
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{
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u32 reg;
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u32 mask;
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if (i2c_num > 2)
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return -EINVAL;
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mask = MXC_CCM_CCGR_CG_MASK
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<< (MXC_CCM_CCGR2_I2C1_SERIAL_OFFSET + (i2c_num << 1));
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reg = __raw_readl(&imx_ccm->CCGR2);
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if (enable)
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reg |= mask;
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else
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reg &= ~mask;
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__raw_writel(reg, &imx_ccm->CCGR2);
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return 0;
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}
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#endif
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static u32 decode_pll(enum pll_clocks pll, u32 infreq)
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{
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u32 div;
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switch (pll) {
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case PLL_SYS:
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div = __raw_readl(&imx_ccm->analog_pll_sys);
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div &= BM_ANADIG_PLL_SYS_DIV_SELECT;
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return infreq * (div >> 1);
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case PLL_BUS:
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div = __raw_readl(&imx_ccm->analog_pll_528);
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div &= BM_ANADIG_PLL_528_DIV_SELECT;
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return infreq * (20 + (div << 1));
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case PLL_USBOTG:
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div = __raw_readl(&imx_ccm->analog_usb1_pll_480_ctrl);
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div &= BM_ANADIG_USB1_PLL_480_CTRL_DIV_SELECT;
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return infreq * (20 + (div << 1));
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case PLL_ENET:
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div = __raw_readl(&imx_ccm->analog_pll_enet);
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div &= BM_ANADIG_PLL_ENET_DIV_SELECT;
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return 25000000 * (div + (div >> 1) + 1);
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default:
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return 0;
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}
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/* NOTREACHED */
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}
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static u32 mxc_get_pll_pfd(enum pll_clocks pll, int pfd_num)
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{
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u32 div;
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u64 freq;
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switch (pll) {
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case PLL_BUS:
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if (pfd_num == 3) {
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/* No PFD3 on PPL2 */
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return 0;
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}
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div = __raw_readl(&imx_ccm->analog_pfd_528);
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freq = (u64)decode_pll(PLL_BUS, MXC_HCLK);
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break;
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case PLL_USBOTG:
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div = __raw_readl(&imx_ccm->analog_pfd_480);
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freq = (u64)decode_pll(PLL_USBOTG, MXC_HCLK);
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break;
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default:
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/* No PFD on other PLL */
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return 0;
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}
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return lldiv(freq * 18, (div & ANATOP_PFD_FRAC_MASK(pfd_num)) >>
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ANATOP_PFD_FRAC_SHIFT(pfd_num));
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}
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static u32 get_mcu_main_clk(void)
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{
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u32 reg, freq;
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reg = __raw_readl(&imx_ccm->cacrr);
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reg &= MXC_CCM_CACRR_ARM_PODF_MASK;
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reg >>= MXC_CCM_CACRR_ARM_PODF_OFFSET;
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freq = decode_pll(PLL_SYS, MXC_HCLK);
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return freq / (reg + 1);
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}
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u32 get_periph_clk(void)
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{
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u32 reg, freq = 0;
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reg = __raw_readl(&imx_ccm->cbcdr);
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if (reg & MXC_CCM_CBCDR_PERIPH_CLK_SEL) {
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reg = __raw_readl(&imx_ccm->cbcmr);
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reg &= MXC_CCM_CBCMR_PERIPH_CLK2_SEL_MASK;
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reg >>= MXC_CCM_CBCMR_PERIPH_CLK2_SEL_OFFSET;
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switch (reg) {
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case 0:
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freq = decode_pll(PLL_USBOTG, MXC_HCLK);
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break;
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case 1:
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case 2:
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freq = MXC_HCLK;
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break;
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default:
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break;
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}
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} else {
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reg = __raw_readl(&imx_ccm->cbcmr);
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reg &= MXC_CCM_CBCMR_PRE_PERIPH_CLK_SEL_MASK;
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reg >>= MXC_CCM_CBCMR_PRE_PERIPH_CLK_SEL_OFFSET;
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switch (reg) {
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case 0:
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freq = decode_pll(PLL_BUS, MXC_HCLK);
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break;
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case 1:
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freq = mxc_get_pll_pfd(PLL_BUS, 2);
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break;
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case 2:
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freq = mxc_get_pll_pfd(PLL_BUS, 0);
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break;
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case 3:
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/* static / 2 divider */
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freq = mxc_get_pll_pfd(PLL_BUS, 2) / 2;
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break;
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default:
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break;
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}
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}
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return freq;
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}
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static u32 get_ipg_clk(void)
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{
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u32 reg, ipg_podf;
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reg = __raw_readl(&imx_ccm->cbcdr);
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reg &= MXC_CCM_CBCDR_IPG_PODF_MASK;
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ipg_podf = reg >> MXC_CCM_CBCDR_IPG_PODF_OFFSET;
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return get_ahb_clk() / (ipg_podf + 1);
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}
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static u32 get_ipg_per_clk(void)
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{
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u32 reg, perclk_podf;
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reg = __raw_readl(&imx_ccm->cscmr1);
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perclk_podf = reg & MXC_CCM_CSCMR1_PERCLK_PODF_MASK;
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return get_ipg_clk() / (perclk_podf + 1);
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}
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static u32 get_uart_clk(void)
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{
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u32 reg, uart_podf;
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u32 freq = decode_pll(PLL_USBOTG, MXC_HCLK) / 6; /* static divider */
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reg = __raw_readl(&imx_ccm->cscdr1);
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#ifdef CONFIG_MX6SL
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if (reg & MXC_CCM_CSCDR1_UART_CLK_SEL)
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freq = MXC_HCLK;
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#endif
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reg &= MXC_CCM_CSCDR1_UART_CLK_PODF_MASK;
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uart_podf = reg >> MXC_CCM_CSCDR1_UART_CLK_PODF_OFFSET;
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return freq / (uart_podf + 1);
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}
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static u32 get_cspi_clk(void)
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{
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u32 reg, cspi_podf;
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reg = __raw_readl(&imx_ccm->cscdr2);
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reg &= MXC_CCM_CSCDR2_ECSPI_CLK_PODF_MASK;
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cspi_podf = reg >> MXC_CCM_CSCDR2_ECSPI_CLK_PODF_OFFSET;
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return decode_pll(PLL_USBOTG, MXC_HCLK) / (8 * (cspi_podf + 1));
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}
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static u32 get_axi_clk(void)
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{
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u32 root_freq, axi_podf;
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u32 cbcdr = __raw_readl(&imx_ccm->cbcdr);
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axi_podf = cbcdr & MXC_CCM_CBCDR_AXI_PODF_MASK;
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axi_podf >>= MXC_CCM_CBCDR_AXI_PODF_OFFSET;
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if (cbcdr & MXC_CCM_CBCDR_AXI_SEL) {
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if (cbcdr & MXC_CCM_CBCDR_AXI_ALT_SEL)
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root_freq = mxc_get_pll_pfd(PLL_BUS, 2);
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else
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root_freq = mxc_get_pll_pfd(PLL_USBOTG, 1);
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} else
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root_freq = get_periph_clk();
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return root_freq / (axi_podf + 1);
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}
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static u32 get_emi_slow_clk(void)
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{
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u32 emi_clk_sel, emi_slow_podf, cscmr1, root_freq = 0;
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cscmr1 = __raw_readl(&imx_ccm->cscmr1);
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emi_clk_sel = cscmr1 & MXC_CCM_CSCMR1_ACLK_EMI_SLOW_MASK;
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emi_clk_sel >>= MXC_CCM_CSCMR1_ACLK_EMI_SLOW_OFFSET;
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emi_slow_podf = cscmr1 & MXC_CCM_CSCMR1_ACLK_EMI_SLOW_PODF_MASK;
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emi_slow_podf >>= MXC_CCM_CSCMR1_ACLK_EMI_SLOW_PODF_OFFSET;
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switch (emi_clk_sel) {
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case 0:
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root_freq = get_axi_clk();
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break;
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case 1:
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root_freq = decode_pll(PLL_USBOTG, MXC_HCLK);
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break;
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case 2:
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root_freq = mxc_get_pll_pfd(PLL_BUS, 2);
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break;
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case 3:
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root_freq = mxc_get_pll_pfd(PLL_BUS, 0);
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break;
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}
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return root_freq / (emi_slow_podf + 1);
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}
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#ifdef CONFIG_MX6SL
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static u32 get_mmdc_ch0_clk(void)
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{
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u32 cbcmr = __raw_readl(&imx_ccm->cbcmr);
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u32 cbcdr = __raw_readl(&imx_ccm->cbcdr);
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u32 freq, podf;
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podf = (cbcdr & MXC_CCM_CBCDR_MMDC_CH1_PODF_MASK) \
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>> MXC_CCM_CBCDR_MMDC_CH1_PODF_OFFSET;
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switch ((cbcmr & MXC_CCM_CBCMR_PRE_PERIPH2_CLK_SEL_MASK) >>
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MXC_CCM_CBCMR_PRE_PERIPH2_CLK_SEL_OFFSET) {
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case 0:
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freq = decode_pll(PLL_BUS, MXC_HCLK);
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break;
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case 1:
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freq = mxc_get_pll_pfd(PLL_BUS, 2);
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break;
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case 2:
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freq = mxc_get_pll_pfd(PLL_BUS, 0);
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break;
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case 3:
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/* static / 2 divider */
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freq = mxc_get_pll_pfd(PLL_BUS, 2) / 2;
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}
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return freq / (podf + 1);
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}
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#else
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static u32 get_mmdc_ch0_clk(void)
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{
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u32 cbcdr = __raw_readl(&imx_ccm->cbcdr);
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u32 mmdc_ch0_podf = (cbcdr & MXC_CCM_CBCDR_MMDC_CH0_PODF_MASK) >>
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MXC_CCM_CBCDR_MMDC_CH0_PODF_OFFSET;
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return get_periph_clk() / (mmdc_ch0_podf + 1);
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}
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#endif
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#ifdef CONFIG_FEC_MXC
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int enable_fec_anatop_clock(enum enet_freq freq)
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{
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u32 reg = 0;
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s32 timeout = 100000;
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struct anatop_regs __iomem *anatop =
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(struct anatop_regs __iomem *)ANATOP_BASE_ADDR;
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if (freq < ENET_25MHz || freq > ENET_125MHz)
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return -EINVAL;
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reg = readl(&anatop->pll_enet);
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reg &= ~BM_ANADIG_PLL_ENET_DIV_SELECT;
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reg |= freq;
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if ((reg & BM_ANADIG_PLL_ENET_POWERDOWN) ||
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(!(reg & BM_ANADIG_PLL_ENET_LOCK))) {
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reg &= ~BM_ANADIG_PLL_ENET_POWERDOWN;
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writel(reg, &anatop->pll_enet);
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while (timeout--) {
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if (readl(&anatop->pll_enet) & BM_ANADIG_PLL_ENET_LOCK)
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break;
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}
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if (timeout < 0)
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return -ETIMEDOUT;
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}
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/* Enable FEC clock */
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reg |= BM_ANADIG_PLL_ENET_ENABLE;
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reg &= ~BM_ANADIG_PLL_ENET_BYPASS;
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writel(reg, &anatop->pll_enet);
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return 0;
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}
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#endif
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static u32 get_usdhc_clk(u32 port)
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{
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u32 root_freq = 0, usdhc_podf = 0, clk_sel = 0;
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u32 cscmr1 = __raw_readl(&imx_ccm->cscmr1);
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u32 cscdr1 = __raw_readl(&imx_ccm->cscdr1);
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switch (port) {
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case 0:
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usdhc_podf = (cscdr1 & MXC_CCM_CSCDR1_USDHC1_PODF_MASK) >>
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MXC_CCM_CSCDR1_USDHC1_PODF_OFFSET;
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clk_sel = cscmr1 & MXC_CCM_CSCMR1_USDHC1_CLK_SEL;
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break;
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case 1:
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usdhc_podf = (cscdr1 & MXC_CCM_CSCDR1_USDHC2_PODF_MASK) >>
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MXC_CCM_CSCDR1_USDHC2_PODF_OFFSET;
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clk_sel = cscmr1 & MXC_CCM_CSCMR1_USDHC2_CLK_SEL;
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break;
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case 2:
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usdhc_podf = (cscdr1 & MXC_CCM_CSCDR1_USDHC3_PODF_MASK) >>
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MXC_CCM_CSCDR1_USDHC3_PODF_OFFSET;
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clk_sel = cscmr1 & MXC_CCM_CSCMR1_USDHC3_CLK_SEL;
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break;
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case 3:
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usdhc_podf = (cscdr1 & MXC_CCM_CSCDR1_USDHC4_PODF_MASK) >>
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MXC_CCM_CSCDR1_USDHC4_PODF_OFFSET;
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clk_sel = cscmr1 & MXC_CCM_CSCMR1_USDHC4_CLK_SEL;
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break;
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default:
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break;
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}
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if (clk_sel)
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root_freq = mxc_get_pll_pfd(PLL_BUS, 0);
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else
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root_freq = mxc_get_pll_pfd(PLL_BUS, 2);
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return root_freq / (usdhc_podf + 1);
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}
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u32 imx_get_uartclk(void)
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{
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return get_uart_clk();
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}
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u32 imx_get_fecclk(void)
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{
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return mxc_get_clock(MXC_IPG_CLK);
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}
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static int enable_enet_pll(uint32_t en)
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{
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struct mxc_ccm_reg *const imx_ccm
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= (struct mxc_ccm_reg *) CCM_BASE_ADDR;
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s32 timeout = 100000;
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u32 reg = 0;
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/* Enable PLLs */
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reg = readl(&imx_ccm->analog_pll_enet);
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reg &= ~BM_ANADIG_PLL_SYS_POWERDOWN;
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writel(reg, &imx_ccm->analog_pll_enet);
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reg |= BM_ANADIG_PLL_SYS_ENABLE;
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while (timeout--) {
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if (readl(&imx_ccm->analog_pll_enet) & BM_ANADIG_PLL_SYS_LOCK)
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break;
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}
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if (timeout <= 0)
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return -EIO;
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reg &= ~BM_ANADIG_PLL_SYS_BYPASS;
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writel(reg, &imx_ccm->analog_pll_enet);
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reg |= en;
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writel(reg, &imx_ccm->analog_pll_enet);
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return 0;
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}
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static void ungate_sata_clock(void)
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{
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struct mxc_ccm_reg *const imx_ccm =
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(struct mxc_ccm_reg *)CCM_BASE_ADDR;
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/* Enable SATA clock. */
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setbits_le32(&imx_ccm->CCGR5, MXC_CCM_CCGR5_SATA_MASK);
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}
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static void ungate_pcie_clock(void)
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{
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struct mxc_ccm_reg *const imx_ccm =
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(struct mxc_ccm_reg *)CCM_BASE_ADDR;
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/* Enable PCIe clock. */
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setbits_le32(&imx_ccm->CCGR4, MXC_CCM_CCGR4_PCIE_MASK);
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}
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int enable_sata_clock(void)
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{
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ungate_sata_clock();
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return enable_enet_pll(BM_ANADIG_PLL_ENET_ENABLE_SATA);
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}
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int enable_pcie_clock(void)
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{
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struct anatop_regs *anatop_regs =
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(struct anatop_regs *)ANATOP_BASE_ADDR;
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struct mxc_ccm_reg *ccm_regs = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
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/*
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* Here be dragons!
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*
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|
* The register ANATOP_MISC1 is not documented in the Freescale
|
|
* MX6RM. The register that is mapped in the ANATOP space and
|
|
* marked as ANATOP_MISC1 is actually documented in the PMU section
|
|
* of the datasheet as PMU_MISC1.
|
|
*
|
|
* Switch LVDS clock source to SATA (0xb), disable clock INPUT and
|
|
* enable clock OUTPUT. This is important for PCI express link that
|
|
* is clocked from the i.MX6.
|
|
*/
|
|
#define ANADIG_ANA_MISC1_LVDSCLK1_IBEN (1 << 12)
|
|
#define ANADIG_ANA_MISC1_LVDSCLK1_OBEN (1 << 10)
|
|
#define ANADIG_ANA_MISC1_LVDS1_CLK_SEL_MASK 0x0000001F
|
|
clrsetbits_le32(&anatop_regs->ana_misc1,
|
|
ANADIG_ANA_MISC1_LVDSCLK1_IBEN |
|
|
ANADIG_ANA_MISC1_LVDS1_CLK_SEL_MASK,
|
|
ANADIG_ANA_MISC1_LVDSCLK1_OBEN | 0xb);
|
|
|
|
/* PCIe reference clock sourced from AXI. */
|
|
clrbits_le32(&ccm_regs->cbcmr, MXC_CCM_CBCMR_PCIE_AXI_CLK_SEL);
|
|
|
|
/* Party time! Ungate the clock to the PCIe. */
|
|
ungate_sata_clock();
|
|
ungate_pcie_clock();
|
|
|
|
return enable_enet_pll(BM_ANADIG_PLL_ENET_ENABLE_SATA |
|
|
BM_ANADIG_PLL_ENET_ENABLE_PCIE);
|
|
}
|
|
|
|
unsigned int mxc_get_clock(enum mxc_clock clk)
|
|
{
|
|
switch (clk) {
|
|
case MXC_ARM_CLK:
|
|
return get_mcu_main_clk();
|
|
case MXC_PER_CLK:
|
|
return get_periph_clk();
|
|
case MXC_AHB_CLK:
|
|
return get_ahb_clk();
|
|
case MXC_IPG_CLK:
|
|
return get_ipg_clk();
|
|
case MXC_IPG_PERCLK:
|
|
case MXC_I2C_CLK:
|
|
return get_ipg_per_clk();
|
|
case MXC_UART_CLK:
|
|
return get_uart_clk();
|
|
case MXC_CSPI_CLK:
|
|
return get_cspi_clk();
|
|
case MXC_AXI_CLK:
|
|
return get_axi_clk();
|
|
case MXC_EMI_SLOW_CLK:
|
|
return get_emi_slow_clk();
|
|
case MXC_DDR_CLK:
|
|
return get_mmdc_ch0_clk();
|
|
case MXC_ESDHC_CLK:
|
|
return get_usdhc_clk(0);
|
|
case MXC_ESDHC2_CLK:
|
|
return get_usdhc_clk(1);
|
|
case MXC_ESDHC3_CLK:
|
|
return get_usdhc_clk(2);
|
|
case MXC_ESDHC4_CLK:
|
|
return get_usdhc_clk(3);
|
|
case MXC_SATA_CLK:
|
|
return get_ahb_clk();
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Dump some core clockes.
|
|
*/
|
|
int do_mx6_showclocks(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
|
{
|
|
u32 freq;
|
|
freq = decode_pll(PLL_SYS, MXC_HCLK);
|
|
printf("PLL_SYS %8d MHz\n", freq / 1000000);
|
|
freq = decode_pll(PLL_BUS, MXC_HCLK);
|
|
printf("PLL_BUS %8d MHz\n", freq / 1000000);
|
|
freq = decode_pll(PLL_USBOTG, MXC_HCLK);
|
|
printf("PLL_OTG %8d MHz\n", freq / 1000000);
|
|
freq = decode_pll(PLL_ENET, MXC_HCLK);
|
|
printf("PLL_NET %8d MHz\n", freq / 1000000);
|
|
|
|
printf("\n");
|
|
printf("IPG %8d kHz\n", mxc_get_clock(MXC_IPG_CLK) / 1000);
|
|
printf("UART %8d kHz\n", mxc_get_clock(MXC_UART_CLK) / 1000);
|
|
#ifdef CONFIG_MXC_SPI
|
|
printf("CSPI %8d kHz\n", mxc_get_clock(MXC_CSPI_CLK) / 1000);
|
|
#endif
|
|
printf("AHB %8d kHz\n", mxc_get_clock(MXC_AHB_CLK) / 1000);
|
|
printf("AXI %8d kHz\n", mxc_get_clock(MXC_AXI_CLK) / 1000);
|
|
printf("DDR %8d kHz\n", mxc_get_clock(MXC_DDR_CLK) / 1000);
|
|
printf("USDHC1 %8d kHz\n", mxc_get_clock(MXC_ESDHC_CLK) / 1000);
|
|
printf("USDHC2 %8d kHz\n", mxc_get_clock(MXC_ESDHC2_CLK) / 1000);
|
|
printf("USDHC3 %8d kHz\n", mxc_get_clock(MXC_ESDHC3_CLK) / 1000);
|
|
printf("USDHC4 %8d kHz\n", mxc_get_clock(MXC_ESDHC4_CLK) / 1000);
|
|
printf("EMI SLOW %8d kHz\n", mxc_get_clock(MXC_EMI_SLOW_CLK) / 1000);
|
|
printf("IPG PERCLK %8d kHz\n", mxc_get_clock(MXC_IPG_PERCLK) / 1000);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void enable_ipu_clock(void)
|
|
{
|
|
struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
|
|
int reg;
|
|
reg = readl(&mxc_ccm->CCGR3);
|
|
reg |= MXC_CCM_CCGR3_IPU1_IPU_MASK;
|
|
writel(reg, &mxc_ccm->CCGR3);
|
|
}
|
|
/***************************************************/
|
|
|
|
U_BOOT_CMD(
|
|
clocks, CONFIG_SYS_MAXARGS, 1, do_mx6_showclocks,
|
|
"display clocks",
|
|
""
|
|
);
|