mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-12 19:36:43 +07:00
38d6590f0f
Instead of using the static definitions, get clkctrl and digctl base addresses with mapping from device tree. Use macro on variable is not nice, but it's done here to save huge pointless diff stat. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Mike Turquette <mturquette@linaro.org>
256 lines
10 KiB
C
256 lines
10 KiB
C
/*
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* Copyright 2012 Freescale Semiconductor, Inc.
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/clk.h>
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#include <linux/clkdev.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <mach/mx28.h>
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#include "clk.h"
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static void __iomem *clkctrl;
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#define CLKCTRL clkctrl
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#define PLL0CTRL0 (CLKCTRL + 0x0000)
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#define PLL1CTRL0 (CLKCTRL + 0x0020)
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#define PLL2CTRL0 (CLKCTRL + 0x0040)
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#define CPU (CLKCTRL + 0x0050)
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#define HBUS (CLKCTRL + 0x0060)
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#define XBUS (CLKCTRL + 0x0070)
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#define XTAL (CLKCTRL + 0x0080)
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#define SSP0 (CLKCTRL + 0x0090)
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#define SSP1 (CLKCTRL + 0x00a0)
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#define SSP2 (CLKCTRL + 0x00b0)
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#define SSP3 (CLKCTRL + 0x00c0)
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#define GPMI (CLKCTRL + 0x00d0)
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#define SPDIF (CLKCTRL + 0x00e0)
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#define EMI (CLKCTRL + 0x00f0)
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#define SAIF0 (CLKCTRL + 0x0100)
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#define SAIF1 (CLKCTRL + 0x0110)
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#define LCDIF (CLKCTRL + 0x0120)
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#define ETM (CLKCTRL + 0x0130)
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#define ENET (CLKCTRL + 0x0140)
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#define FLEXCAN (CLKCTRL + 0x0160)
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#define FRAC0 (CLKCTRL + 0x01b0)
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#define FRAC1 (CLKCTRL + 0x01c0)
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#define CLKSEQ (CLKCTRL + 0x01d0)
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#define BP_CPU_INTERRUPT_WAIT 12
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#define BP_SAIF_DIV_FRAC_EN 16
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#define BP_ENET_DIV_TIME 21
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#define BP_ENET_SLEEP 31
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#define BP_CLKSEQ_BYPASS_SAIF0 0
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#define BP_CLKSEQ_BYPASS_SSP0 3
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#define BP_FRAC0_IO1FRAC 16
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#define BP_FRAC0_IO0FRAC 24
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static void __iomem *digctrl;
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#define DIGCTRL digctrl
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#define BP_SAIF_CLKMUX 10
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/*
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* HW_SAIF_CLKMUX_SEL:
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* DIRECT(0x0): SAIF0 clock pins selected for SAIF0 input clocks, and SAIF1
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* clock pins selected for SAIF1 input clocks.
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* CROSSINPUT(0x1): SAIF1 clock inputs selected for SAIF0 input clocks, and
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* SAIF0 clock inputs selected for SAIF1 input clocks.
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* EXTMSTR0(0x2): SAIF0 clock pin selected for both SAIF0 and SAIF1 input
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* clocks.
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* EXTMSTR1(0x3): SAIF1 clock pin selected for both SAIF0 and SAIF1 input
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* clocks.
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*/
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int mxs_saif_clkmux_select(unsigned int clkmux)
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{
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if (clkmux > 0x3)
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return -EINVAL;
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__mxs_clrl(0x3 << BP_SAIF_CLKMUX, DIGCTRL);
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__mxs_setl(clkmux << BP_SAIF_CLKMUX, DIGCTRL);
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return 0;
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}
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static void __init clk_misc_init(void)
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{
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u32 val;
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/* Gate off cpu clock in WFI for power saving */
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__mxs_setl(1 << BP_CPU_INTERRUPT_WAIT, CPU);
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/* 0 is a bad default value for a divider */
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__mxs_setl(1 << BP_ENET_DIV_TIME, ENET);
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/* Clear BYPASS for SAIF */
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__mxs_clrl(0x3 << BP_CLKSEQ_BYPASS_SAIF0, CLKSEQ);
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/* SAIF has to use frac div for functional operation */
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val = readl_relaxed(SAIF0);
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val |= 1 << BP_SAIF_DIV_FRAC_EN;
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writel_relaxed(val, SAIF0);
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val = readl_relaxed(SAIF1);
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val |= 1 << BP_SAIF_DIV_FRAC_EN;
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writel_relaxed(val, SAIF1);
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/* Extra fec clock setting */
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val = readl_relaxed(ENET);
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val &= ~(1 << BP_ENET_SLEEP);
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writel_relaxed(val, ENET);
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/*
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* Source ssp clock from ref_io than ref_xtal,
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* as ref_xtal only provides 24 MHz as maximum.
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*/
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__mxs_clrl(0xf << BP_CLKSEQ_BYPASS_SSP0, CLKSEQ);
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/*
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* 480 MHz seems too high to be ssp clock source directly,
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* so set frac0 to get a 288 MHz ref_io0 and ref_io1.
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*/
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val = readl_relaxed(FRAC0);
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val &= ~((0x3f << BP_FRAC0_IO0FRAC) | (0x3f << BP_FRAC0_IO1FRAC));
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val |= (30 << BP_FRAC0_IO0FRAC) | (30 << BP_FRAC0_IO1FRAC);
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writel_relaxed(val, FRAC0);
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}
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static const char *sel_cpu[] __initconst = { "ref_cpu", "ref_xtal", };
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static const char *sel_io0[] __initconst = { "ref_io0", "ref_xtal", };
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static const char *sel_io1[] __initconst = { "ref_io1", "ref_xtal", };
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static const char *sel_pix[] __initconst = { "ref_pix", "ref_xtal", };
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static const char *sel_gpmi[] __initconst = { "ref_gpmi", "ref_xtal", };
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static const char *sel_pll0[] __initconst = { "pll0", "ref_xtal", };
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static const char *cpu_sels[] __initconst = { "cpu_pll", "cpu_xtal", };
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static const char *emi_sels[] __initconst = { "emi_pll", "emi_xtal", };
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static const char *ptp_sels[] __initconst = { "ref_xtal", "pll0", };
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enum imx28_clk {
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ref_xtal, pll0, pll1, pll2, ref_cpu, ref_emi, ref_io0, ref_io1,
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ref_pix, ref_hsadc, ref_gpmi, saif0_sel, saif1_sel, gpmi_sel,
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ssp0_sel, ssp1_sel, ssp2_sel, ssp3_sel, emi_sel, etm_sel,
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lcdif_sel, cpu, ptp_sel, cpu_pll, cpu_xtal, hbus, xbus,
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ssp0_div, ssp1_div, ssp2_div, ssp3_div, gpmi_div, emi_pll,
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emi_xtal, lcdif_div, etm_div, ptp, saif0_div, saif1_div,
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clk32k_div, rtc, lradc, spdif_div, clk32k, pwm, uart, ssp0,
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ssp1, ssp2, ssp3, gpmi, spdif, emi, saif0, saif1, lcdif, etm,
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fec, can0, can1, usb0, usb1, usb0_phy, usb1_phy, enet_out,
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clk_max
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};
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static struct clk *clks[clk_max];
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static struct clk_onecell_data clk_data;
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static enum imx28_clk clks_init_on[] __initdata = {
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cpu, hbus, xbus, emi, uart,
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};
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int __init mx28_clocks_init(void)
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{
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struct device_node *np;
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u32 i;
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np = of_find_compatible_node(NULL, NULL, "fsl,imx28-digctl");
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digctrl = of_iomap(np, 0);
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WARN_ON(!digctrl);
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np = of_find_compatible_node(NULL, NULL, "fsl,imx28-clkctrl");
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clkctrl = of_iomap(np, 0);
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WARN_ON(!clkctrl);
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clk_misc_init();
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clks[ref_xtal] = mxs_clk_fixed("ref_xtal", 24000000);
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clks[pll0] = mxs_clk_pll("pll0", "ref_xtal", PLL0CTRL0, 17, 480000000);
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clks[pll1] = mxs_clk_pll("pll1", "ref_xtal", PLL1CTRL0, 17, 480000000);
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clks[pll2] = mxs_clk_pll("pll2", "ref_xtal", PLL2CTRL0, 23, 50000000);
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clks[ref_cpu] = mxs_clk_ref("ref_cpu", "pll0", FRAC0, 0);
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clks[ref_emi] = mxs_clk_ref("ref_emi", "pll0", FRAC0, 1);
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clks[ref_io1] = mxs_clk_ref("ref_io1", "pll0", FRAC0, 2);
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clks[ref_io0] = mxs_clk_ref("ref_io0", "pll0", FRAC0, 3);
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clks[ref_pix] = mxs_clk_ref("ref_pix", "pll0", FRAC1, 0);
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clks[ref_hsadc] = mxs_clk_ref("ref_hsadc", "pll0", FRAC1, 1);
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clks[ref_gpmi] = mxs_clk_ref("ref_gpmi", "pll0", FRAC1, 2);
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clks[saif0_sel] = mxs_clk_mux("saif0_sel", CLKSEQ, 0, 1, sel_pll0, ARRAY_SIZE(sel_pll0));
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clks[saif1_sel] = mxs_clk_mux("saif1_sel", CLKSEQ, 1, 1, sel_pll0, ARRAY_SIZE(sel_pll0));
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clks[gpmi_sel] = mxs_clk_mux("gpmi_sel", CLKSEQ, 2, 1, sel_gpmi, ARRAY_SIZE(sel_gpmi));
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clks[ssp0_sel] = mxs_clk_mux("ssp0_sel", CLKSEQ, 3, 1, sel_io0, ARRAY_SIZE(sel_io0));
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clks[ssp1_sel] = mxs_clk_mux("ssp1_sel", CLKSEQ, 4, 1, sel_io0, ARRAY_SIZE(sel_io0));
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clks[ssp2_sel] = mxs_clk_mux("ssp2_sel", CLKSEQ, 5, 1, sel_io1, ARRAY_SIZE(sel_io1));
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clks[ssp3_sel] = mxs_clk_mux("ssp3_sel", CLKSEQ, 6, 1, sel_io1, ARRAY_SIZE(sel_io1));
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clks[emi_sel] = mxs_clk_mux("emi_sel", CLKSEQ, 7, 1, emi_sels, ARRAY_SIZE(emi_sels));
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clks[etm_sel] = mxs_clk_mux("etm_sel", CLKSEQ, 8, 1, sel_cpu, ARRAY_SIZE(sel_cpu));
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clks[lcdif_sel] = mxs_clk_mux("lcdif_sel", CLKSEQ, 14, 1, sel_pix, ARRAY_SIZE(sel_pix));
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clks[cpu] = mxs_clk_mux("cpu", CLKSEQ, 18, 1, cpu_sels, ARRAY_SIZE(cpu_sels));
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clks[ptp_sel] = mxs_clk_mux("ptp_sel", ENET, 19, 1, ptp_sels, ARRAY_SIZE(ptp_sels));
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clks[cpu_pll] = mxs_clk_div("cpu_pll", "ref_cpu", CPU, 0, 6, 28);
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clks[cpu_xtal] = mxs_clk_div("cpu_xtal", "ref_xtal", CPU, 16, 10, 29);
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clks[hbus] = mxs_clk_div("hbus", "cpu", HBUS, 0, 5, 31);
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clks[xbus] = mxs_clk_div("xbus", "ref_xtal", XBUS, 0, 10, 31);
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clks[ssp0_div] = mxs_clk_div("ssp0_div", "ssp0_sel", SSP0, 0, 9, 29);
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clks[ssp1_div] = mxs_clk_div("ssp1_div", "ssp1_sel", SSP1, 0, 9, 29);
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clks[ssp2_div] = mxs_clk_div("ssp2_div", "ssp2_sel", SSP2, 0, 9, 29);
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clks[ssp3_div] = mxs_clk_div("ssp3_div", "ssp3_sel", SSP3, 0, 9, 29);
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clks[gpmi_div] = mxs_clk_div("gpmi_div", "gpmi_sel", GPMI, 0, 10, 29);
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clks[emi_pll] = mxs_clk_div("emi_pll", "ref_emi", EMI, 0, 6, 28);
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clks[emi_xtal] = mxs_clk_div("emi_xtal", "ref_xtal", EMI, 8, 4, 29);
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clks[lcdif_div] = mxs_clk_div("lcdif_div", "lcdif_sel", LCDIF, 0, 13, 29);
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clks[etm_div] = mxs_clk_div("etm_div", "etm_sel", ETM, 0, 7, 29);
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clks[ptp] = mxs_clk_div("ptp", "ptp_sel", ENET, 21, 6, 27);
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clks[saif0_div] = mxs_clk_frac("saif0_div", "saif0_sel", SAIF0, 0, 16, 29);
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clks[saif1_div] = mxs_clk_frac("saif1_div", "saif1_sel", SAIF1, 0, 16, 29);
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clks[clk32k_div] = mxs_clk_fixed_factor("clk32k_div", "ref_xtal", 1, 750);
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clks[rtc] = mxs_clk_fixed_factor("rtc", "ref_xtal", 1, 768);
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clks[lradc] = mxs_clk_fixed_factor("lradc", "clk32k", 1, 16);
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clks[spdif_div] = mxs_clk_fixed_factor("spdif_div", "pll0", 1, 4);
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clks[clk32k] = mxs_clk_gate("clk32k", "clk32k_div", XTAL, 26);
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clks[pwm] = mxs_clk_gate("pwm", "ref_xtal", XTAL, 29);
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clks[uart] = mxs_clk_gate("uart", "ref_xtal", XTAL, 31);
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clks[ssp0] = mxs_clk_gate("ssp0", "ssp0_div", SSP0, 31);
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clks[ssp1] = mxs_clk_gate("ssp1", "ssp1_div", SSP1, 31);
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clks[ssp2] = mxs_clk_gate("ssp2", "ssp2_div", SSP2, 31);
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clks[ssp3] = mxs_clk_gate("ssp3", "ssp3_div", SSP3, 31);
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clks[gpmi] = mxs_clk_gate("gpmi", "gpmi_div", GPMI, 31);
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clks[spdif] = mxs_clk_gate("spdif", "spdif_div", SPDIF, 31);
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clks[emi] = mxs_clk_gate("emi", "emi_sel", EMI, 31);
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clks[saif0] = mxs_clk_gate("saif0", "saif0_div", SAIF0, 31);
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clks[saif1] = mxs_clk_gate("saif1", "saif1_div", SAIF1, 31);
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clks[lcdif] = mxs_clk_gate("lcdif", "lcdif_div", LCDIF, 31);
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clks[etm] = mxs_clk_gate("etm", "etm_div", ETM, 31);
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clks[fec] = mxs_clk_gate("fec", "hbus", ENET, 30);
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clks[can0] = mxs_clk_gate("can0", "ref_xtal", FLEXCAN, 30);
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clks[can1] = mxs_clk_gate("can1", "ref_xtal", FLEXCAN, 28);
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clks[usb0] = mxs_clk_gate("usb0", "usb0_phy", DIGCTRL, 2);
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clks[usb1] = mxs_clk_gate("usb1", "usb1_phy", DIGCTRL, 16);
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clks[usb0_phy] = clk_register_gate(NULL, "usb0_phy", "pll0", 0, PLL0CTRL0, 18, 0, &mxs_lock);
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clks[usb1_phy] = clk_register_gate(NULL, "usb1_phy", "pll1", 0, PLL1CTRL0, 18, 0, &mxs_lock);
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clks[enet_out] = clk_register_gate(NULL, "enet_out", "pll2", 0, ENET, 18, 0, &mxs_lock);
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for (i = 0; i < ARRAY_SIZE(clks); i++)
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if (IS_ERR(clks[i])) {
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pr_err("i.MX28 clk %d: register failed with %ld\n",
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i, PTR_ERR(clks[i]));
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return PTR_ERR(clks[i]);
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}
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clk_data.clks = clks;
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clk_data.clk_num = ARRAY_SIZE(clks);
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of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
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clk_register_clkdev(clks[enet_out], NULL, "enet_out");
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for (i = 0; i < ARRAY_SIZE(clks_init_on); i++)
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clk_prepare_enable(clks[clks_init_on[i]]);
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return 0;
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}
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