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linux/drivers/clk/mxs/clk-imx23.c
Thomas Gleixner fcaf20360a treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 159 
Based on 1 normalized pattern(s):

  the code contained herein is licensed under the gnu general public
  license you may obtain a copy of the gnu general public license
  version 2 or later at the following locations http www opensource
  org licenses gpl license html http www gnu org copyleft gpl html

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 161 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.383790741@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:37 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2012 Freescale Semiconductor, Inc.
*/
#include <linux/clk/mxs.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include "clk.h"
static void __iomem *clkctrl;
static void __iomem *digctrl;
#define CLKCTRL clkctrl
#define DIGCTRL digctrl
#define PLLCTRL0 (CLKCTRL + 0x0000)
#define CPU (CLKCTRL + 0x0020)
#define HBUS (CLKCTRL + 0x0030)
#define XBUS (CLKCTRL + 0x0040)
#define XTAL (CLKCTRL + 0x0050)
#define PIX (CLKCTRL + 0x0060)
#define SSP (CLKCTRL + 0x0070)
#define GPMI (CLKCTRL + 0x0080)
#define SPDIF (CLKCTRL + 0x0090)
#define EMI (CLKCTRL + 0x00a0)
#define SAIF (CLKCTRL + 0x00c0)
#define TV (CLKCTRL + 0x00d0)
#define ETM (CLKCTRL + 0x00e0)
#define FRAC (CLKCTRL + 0x00f0)
#define CLKSEQ (CLKCTRL + 0x0110)
#define BP_CPU_INTERRUPT_WAIT 12
#define BP_CLKSEQ_BYPASS_SAIF 0
#define BP_CLKSEQ_BYPASS_SSP 5
#define BP_SAIF_DIV_FRAC_EN 16
#define BP_FRAC_IOFRAC 24
static void __init clk_misc_init(void)
{
u32 val;
/* Gate off cpu clock in WFI for power saving */
writel_relaxed(1 << BP_CPU_INTERRUPT_WAIT, CPU + SET);
/* Clear BYPASS for SAIF */
writel_relaxed(1 << BP_CLKSEQ_BYPASS_SAIF, CLKSEQ + CLR);
/* SAIF has to use frac div for functional operation */
val = readl_relaxed(SAIF);
val |= 1 << BP_SAIF_DIV_FRAC_EN;
writel_relaxed(val, SAIF);
/*
* Source ssp clock from ref_io than ref_xtal,
* as ref_xtal only provides 24 MHz as maximum.
*/
writel_relaxed(1 << BP_CLKSEQ_BYPASS_SSP, CLKSEQ + CLR);
/*
* 480 MHz seems too high to be ssp clock source directly,
* so set frac to get a 288 MHz ref_io.
*/
writel_relaxed(0x3f << BP_FRAC_IOFRAC, FRAC + CLR);
writel_relaxed(30 << BP_FRAC_IOFRAC, FRAC + SET);
}
static const char *const sel_pll[] __initconst = { "pll", "ref_xtal", };
static const char *const sel_cpu[] __initconst = { "ref_cpu", "ref_xtal", };
static const char *const sel_pix[] __initconst = { "ref_pix", "ref_xtal", };
static const char *const sel_io[] __initconst = { "ref_io", "ref_xtal", };
static const char *const cpu_sels[] __initconst = { "cpu_pll", "cpu_xtal", };
static const char *const emi_sels[] __initconst = { "emi_pll", "emi_xtal", };
enum imx23_clk {
ref_xtal, pll, ref_cpu, ref_emi, ref_pix, ref_io, saif_sel,
lcdif_sel, gpmi_sel, ssp_sel, emi_sel, cpu, etm_sel, cpu_pll,
cpu_xtal, hbus, xbus, lcdif_div, ssp_div, gpmi_div, emi_pll,
emi_xtal, etm_div, saif_div, clk32k_div, rtc, adc, spdif_div,
clk32k, dri, pwm, filt, uart, ssp, gpmi, spdif, emi, saif,
lcdif, etm, usb, usb_phy,
clk_max
};
static struct clk *clks[clk_max];
static struct clk_onecell_data clk_data;
static enum imx23_clk clks_init_on[] __initdata = {
cpu, hbus, xbus, emi, uart,
};
static void __init mx23_clocks_init(struct device_node *np)
{
struct device_node *dcnp;
u32 i;
dcnp = of_find_compatible_node(NULL, NULL, "fsl,imx23-digctl");
digctrl = of_iomap(dcnp, 0);
WARN_ON(!digctrl);
of_node_put(dcnp);
clkctrl = of_iomap(np, 0);
WARN_ON(!clkctrl);
clk_misc_init();
clks[ref_xtal] = mxs_clk_fixed("ref_xtal", 24000000);
clks[pll] = mxs_clk_pll("pll", "ref_xtal", PLLCTRL0, 16, 480000000);
clks[ref_cpu] = mxs_clk_ref("ref_cpu", "pll", FRAC, 0);
clks[ref_emi] = mxs_clk_ref("ref_emi", "pll", FRAC, 1);
clks[ref_pix] = mxs_clk_ref("ref_pix", "pll", FRAC, 2);
clks[ref_io] = mxs_clk_ref("ref_io", "pll", FRAC, 3);
clks[saif_sel] = mxs_clk_mux("saif_sel", CLKSEQ, 0, 1, sel_pll, ARRAY_SIZE(sel_pll));
clks[lcdif_sel] = mxs_clk_mux("lcdif_sel", CLKSEQ, 1, 1, sel_pix, ARRAY_SIZE(sel_pix));
clks[gpmi_sel] = mxs_clk_mux("gpmi_sel", CLKSEQ, 4, 1, sel_io, ARRAY_SIZE(sel_io));
clks[ssp_sel] = mxs_clk_mux("ssp_sel", CLKSEQ, 5, 1, sel_io, ARRAY_SIZE(sel_io));
clks[emi_sel] = mxs_clk_mux("emi_sel", CLKSEQ, 6, 1, emi_sels, ARRAY_SIZE(emi_sels));
clks[cpu] = mxs_clk_mux("cpu", CLKSEQ, 7, 1, cpu_sels, ARRAY_SIZE(cpu_sels));
clks[etm_sel] = mxs_clk_mux("etm_sel", CLKSEQ, 8, 1, sel_cpu, ARRAY_SIZE(sel_cpu));
clks[cpu_pll] = mxs_clk_div("cpu_pll", "ref_cpu", CPU, 0, 6, 28);
clks[cpu_xtal] = mxs_clk_div("cpu_xtal", "ref_xtal", CPU, 16, 10, 29);
clks[hbus] = mxs_clk_div("hbus", "cpu", HBUS, 0, 5, 29);
clks[xbus] = mxs_clk_div("xbus", "ref_xtal", XBUS, 0, 10, 31);
clks[lcdif_div] = mxs_clk_div("lcdif_div", "lcdif_sel", PIX, 0, 12, 29);
clks[ssp_div] = mxs_clk_div("ssp_div", "ssp_sel", SSP, 0, 9, 29);
clks[gpmi_div] = mxs_clk_div("gpmi_div", "gpmi_sel", GPMI, 0, 10, 29);
clks[emi_pll] = mxs_clk_div("emi_pll", "ref_emi", EMI, 0, 6, 28);
clks[emi_xtal] = mxs_clk_div("emi_xtal", "ref_xtal", EMI, 8, 4, 29);
clks[etm_div] = mxs_clk_div("etm_div", "etm_sel", ETM, 0, 6, 29);
clks[saif_div] = mxs_clk_frac("saif_div", "saif_sel", SAIF, 0, 16, 29);
clks[clk32k_div] = mxs_clk_fixed_factor("clk32k_div", "ref_xtal", 1, 750);
clks[rtc] = mxs_clk_fixed_factor("rtc", "ref_xtal", 1, 768);
clks[adc] = mxs_clk_fixed_factor("adc", "clk32k", 1, 16);
clks[spdif_div] = mxs_clk_fixed_factor("spdif_div", "pll", 1, 4);
clks[clk32k] = mxs_clk_gate("clk32k", "clk32k_div", XTAL, 26);
clks[dri] = mxs_clk_gate("dri", "ref_xtal", XTAL, 28);
clks[pwm] = mxs_clk_gate("pwm", "ref_xtal", XTAL, 29);
clks[filt] = mxs_clk_gate("filt", "ref_xtal", XTAL, 30);
clks[uart] = mxs_clk_gate("uart", "ref_xtal", XTAL, 31);
clks[ssp] = mxs_clk_gate("ssp", "ssp_div", SSP, 31);
clks[gpmi] = mxs_clk_gate("gpmi", "gpmi_div", GPMI, 31);
clks[spdif] = mxs_clk_gate("spdif", "spdif_div", SPDIF, 31);
clks[emi] = mxs_clk_gate("emi", "emi_sel", EMI, 31);
clks[saif] = mxs_clk_gate("saif", "saif_div", SAIF, 31);
clks[lcdif] = mxs_clk_gate("lcdif", "lcdif_div", PIX, 31);
clks[etm] = mxs_clk_gate("etm", "etm_div", ETM, 31);
clks[usb] = mxs_clk_gate("usb", "usb_phy", DIGCTRL, 2);
clks[usb_phy] = clk_register_gate(NULL, "usb_phy", "pll", 0, PLLCTRL0, 18, 0, &mxs_lock);
for (i = 0; i < ARRAY_SIZE(clks); i++)
if (IS_ERR(clks[i])) {
pr_err("i.MX23 clk %d: register failed with %ld\n",
i, PTR_ERR(clks[i]));
return;
}
clk_data.clks = clks;
clk_data.clk_num = ARRAY_SIZE(clks);
of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
for (i = 0; i < ARRAY_SIZE(clks_init_on); i++)
clk_prepare_enable(clks[clks_init_on[i]]);
}
CLK_OF_DECLARE(imx23_clkctrl, "fsl,imx23-clkctrl", mx23_clocks_init);
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