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linux/drivers/clk/imx/clk-imx35.c
Alexander Kurz 3397c2c45b ARM: dts: imx35: restore existing used clock enumeration 
A new element got inserted into enum mx35_clks with commit 3713e3f5e9
("clk: imx35: define two clocks for rtc"). This insertion shifted most
nummerical clock assignments to a new nummerical value which in turn
rendered most hardcoded nummeric values in imx35.dtsi incorrect.

Restore the existing order by moving the newly introduced clock to the
end of the enum. Update the dts documentation accordingly.

Signed-off-by: Alexander Kurz <akurz@blala.de>
Fixes: 3713e3f5e9 ("clk: imx35: define two clocks for rtc")
Cc: <stable@vger.kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2016-04-18 12:37:21 +08:00

330 lines
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/*
* Copyright (C) 2012 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/clkdev.h>
#include <linux/of.h>
#include <linux/err.h>
#include <soc/imx/revision.h>
#include <soc/imx/timer.h>
#include <asm/irq.h>
#include "clk.h"
#define MX35_CCM_BASE_ADDR 0x53f80000
#define MX35_GPT1_BASE_ADDR 0x53f90000
#define MX35_INT_GPT (NR_IRQS_LEGACY + 29)
#define MXC_CCM_PDR0 0x04
#define MX35_CCM_PDR2 0x0c
#define MX35_CCM_PDR3 0x10
#define MX35_CCM_PDR4 0x14
#define MX35_CCM_MPCTL 0x1c
#define MX35_CCM_PPCTL 0x20
#define MX35_CCM_CGR0 0x2c
#define MX35_CCM_CGR1 0x30
#define MX35_CCM_CGR2 0x34
#define MX35_CCM_CGR3 0x38
struct arm_ahb_div {
unsigned char arm, ahb, sel;
};
static struct arm_ahb_div clk_consumer[] = {
{ .arm = 1, .ahb = 4, .sel = 0},
{ .arm = 1, .ahb = 3, .sel = 1},
{ .arm = 2, .ahb = 2, .sel = 0},
{ .arm = 0, .ahb = 0, .sel = 0},
{ .arm = 0, .ahb = 0, .sel = 0},
{ .arm = 0, .ahb = 0, .sel = 0},
{ .arm = 4, .ahb = 1, .sel = 0},
{ .arm = 1, .ahb = 5, .sel = 0},
{ .arm = 1, .ahb = 8, .sel = 0},
{ .arm = 1, .ahb = 6, .sel = 1},
{ .arm = 2, .ahb = 4, .sel = 0},
{ .arm = 0, .ahb = 0, .sel = 0},
{ .arm = 0, .ahb = 0, .sel = 0},
{ .arm = 0, .ahb = 0, .sel = 0},
{ .arm = 4, .ahb = 2, .sel = 0},
{ .arm = 0, .ahb = 0, .sel = 0},
};
static char hsp_div_532[] = { 4, 8, 3, 0 };
static char hsp_div_400[] = { 3, 6, 3, 0 };
static struct clk_onecell_data clk_data;
static const char *std_sel[] = {"ppll", "arm"};
static const char *ipg_per_sel[] = {"ahb_per_div", "arm_per_div"};
enum mx35_clks {
ckih, mpll, ppll, mpll_075, arm, hsp, hsp_div, hsp_sel, ahb, ipg,
arm_per_div, ahb_per_div, ipg_per, uart_sel, uart_div, esdhc_sel,
esdhc1_div, esdhc2_div, esdhc3_div, spdif_sel, spdif_div_pre,
spdif_div_post, ssi_sel, ssi1_div_pre, ssi1_div_post, ssi2_div_pre,
ssi2_div_post, usb_sel, usb_div, nfc_div, asrc_gate, pata_gate,
audmux_gate, can1_gate, can2_gate, cspi1_gate, cspi2_gate, ect_gate,
edio_gate, emi_gate, epit1_gate, epit2_gate, esai_gate, esdhc1_gate,
esdhc2_gate, esdhc3_gate, fec_gate, gpio1_gate, gpio2_gate, gpio3_gate,
gpt_gate, i2c1_gate, i2c2_gate, i2c3_gate, iomuxc_gate, ipu_gate,
kpp_gate, mlb_gate, mshc_gate, owire_gate, pwm_gate, rngc_gate,
rtc_gate, rtic_gate, scc_gate, sdma_gate, spba_gate, spdif_gate,
ssi1_gate, ssi2_gate, uart1_gate, uart2_gate, uart3_gate, usbotg_gate,
wdog_gate, max_gate, admux_gate, csi_gate, csi_div, csi_sel, iim_gate,
gpu2d_gate, ckil, clk_max
};
static struct clk *clk[clk_max];
static struct clk ** const uart_clks[] __initconst = {
&clk[ipg],
&clk[uart1_gate],
&clk[uart2_gate],
&clk[uart3_gate],
NULL
};
static void __init _mx35_clocks_init(void)
{
void __iomem *base;
u32 pdr0, consumer_sel, hsp_sel;
struct arm_ahb_div *aad;
unsigned char *hsp_div;
base = ioremap(MX35_CCM_BASE_ADDR, SZ_4K);
BUG_ON(!base);
pdr0 = __raw_readl(base + MXC_CCM_PDR0);
consumer_sel = (pdr0 >> 16) & 0xf;
aad = &clk_consumer[consumer_sel];
if (!aad->arm) {
pr_err("i.MX35 clk: illegal consumer mux selection 0x%x\n", consumer_sel);
/*
* We are basically stuck. Continue with a default entry and hope we
* get far enough to actually show the above message
*/
aad = &clk_consumer[0];
}
clk[ckih] = imx_clk_fixed("ckih", 24000000);
clk[ckil] = imx_clk_fixed("ckih", 32768);
clk[mpll] = imx_clk_pllv1(IMX_PLLV1_IMX35, "mpll", "ckih", base + MX35_CCM_MPCTL);
clk[ppll] = imx_clk_pllv1(IMX_PLLV1_IMX35, "ppll", "ckih", base + MX35_CCM_PPCTL);
clk[mpll] = imx_clk_fixed_factor("mpll_075", "mpll", 3, 4);
if (aad->sel)
clk[arm] = imx_clk_fixed_factor("arm", "mpll_075", 1, aad->arm);
else
clk[arm] = imx_clk_fixed_factor("arm", "mpll", 1, aad->arm);
if (clk_get_rate(clk[arm]) > 400000000)
hsp_div = hsp_div_532;
else
hsp_div = hsp_div_400;
hsp_sel = (pdr0 >> 20) & 0x3;
if (!hsp_div[hsp_sel]) {
pr_err("i.MX35 clk: illegal hsp clk selection 0x%x\n", hsp_sel);
hsp_sel = 0;
}
clk[hsp] = imx_clk_fixed_factor("hsp", "arm", 1, hsp_div[hsp_sel]);
clk[ahb] = imx_clk_fixed_factor("ahb", "arm", 1, aad->ahb);
clk[ipg] = imx_clk_fixed_factor("ipg", "ahb", 1, 2);
clk[arm_per_div] = imx_clk_divider("arm_per_div", "arm", base + MX35_CCM_PDR4, 16, 6);
clk[ahb_per_div] = imx_clk_divider("ahb_per_div", "ahb", base + MXC_CCM_PDR0, 12, 3);
clk[ipg_per] = imx_clk_mux("ipg_per", base + MXC_CCM_PDR0, 26, 1, ipg_per_sel, ARRAY_SIZE(ipg_per_sel));
clk[uart_sel] = imx_clk_mux("uart_sel", base + MX35_CCM_PDR3, 14, 1, std_sel, ARRAY_SIZE(std_sel));
clk[uart_div] = imx_clk_divider("uart_div", "uart_sel", base + MX35_CCM_PDR4, 10, 6);
clk[esdhc_sel] = imx_clk_mux("esdhc_sel", base + MX35_CCM_PDR4, 9, 1, std_sel, ARRAY_SIZE(std_sel));
clk[esdhc1_div] = imx_clk_divider("esdhc1_div", "esdhc_sel", base + MX35_CCM_PDR3, 0, 6);
clk[esdhc2_div] = imx_clk_divider("esdhc2_div", "esdhc_sel", base + MX35_CCM_PDR3, 8, 6);
clk[esdhc3_div] = imx_clk_divider("esdhc3_div", "esdhc_sel", base + MX35_CCM_PDR3, 16, 6);
clk[spdif_sel] = imx_clk_mux("spdif_sel", base + MX35_CCM_PDR3, 22, 1, std_sel, ARRAY_SIZE(std_sel));
clk[spdif_div_pre] = imx_clk_divider("spdif_div_pre", "spdif_sel", base + MX35_CCM_PDR3, 29, 3); /* divide by 1 not allowed */
clk[spdif_div_post] = imx_clk_divider("spdif_div_post", "spdif_div_pre", base + MX35_CCM_PDR3, 23, 6);
clk[ssi_sel] = imx_clk_mux("ssi_sel", base + MX35_CCM_PDR2, 6, 1, std_sel, ARRAY_SIZE(std_sel));
clk[ssi1_div_pre] = imx_clk_divider("ssi1_div_pre", "ssi_sel", base + MX35_CCM_PDR2, 24, 3);
clk[ssi1_div_post] = imx_clk_divider("ssi1_div_post", "ssi1_div_pre", base + MX35_CCM_PDR2, 0, 6);
clk[ssi2_div_pre] = imx_clk_divider("ssi2_div_pre", "ssi_sel", base + MX35_CCM_PDR2, 27, 3);
clk[ssi2_div_post] = imx_clk_divider("ssi2_div_post", "ssi2_div_pre", base + MX35_CCM_PDR2, 8, 6);
clk[usb_sel] = imx_clk_mux("usb_sel", base + MX35_CCM_PDR4, 9, 1, std_sel, ARRAY_SIZE(std_sel));
clk[usb_div] = imx_clk_divider("usb_div", "usb_sel", base + MX35_CCM_PDR4, 22, 6);
clk[nfc_div] = imx_clk_divider("nfc_div", "ahb", base + MX35_CCM_PDR4, 28, 4);
clk[csi_sel] = imx_clk_mux("csi_sel", base + MX35_CCM_PDR2, 7, 1, std_sel, ARRAY_SIZE(std_sel));
clk[csi_div] = imx_clk_divider("csi_div", "csi_sel", base + MX35_CCM_PDR2, 16, 6);
clk[asrc_gate] = imx_clk_gate2("asrc_gate", "ipg", base + MX35_CCM_CGR0, 0);
clk[pata_gate] = imx_clk_gate2("pata_gate", "ipg", base + MX35_CCM_CGR0, 2);
clk[audmux_gate] = imx_clk_gate2("audmux_gate", "ipg", base + MX35_CCM_CGR0, 4);
clk[can1_gate] = imx_clk_gate2("can1_gate", "ipg", base + MX35_CCM_CGR0, 6);
clk[can2_gate] = imx_clk_gate2("can2_gate", "ipg", base + MX35_CCM_CGR0, 8);
clk[cspi1_gate] = imx_clk_gate2("cspi1_gate", "ipg", base + MX35_CCM_CGR0, 10);
clk[cspi2_gate] = imx_clk_gate2("cspi2_gate", "ipg", base + MX35_CCM_CGR0, 12);
clk[ect_gate] = imx_clk_gate2("ect_gate", "ipg", base + MX35_CCM_CGR0, 14);
clk[edio_gate] = imx_clk_gate2("edio_gate", "ipg", base + MX35_CCM_CGR0, 16);
clk[emi_gate] = imx_clk_gate2("emi_gate", "ipg", base + MX35_CCM_CGR0, 18);
clk[epit1_gate] = imx_clk_gate2("epit1_gate", "ipg", base + MX35_CCM_CGR0, 20);
clk[epit2_gate] = imx_clk_gate2("epit2_gate", "ipg", base + MX35_CCM_CGR0, 22);
clk[esai_gate] = imx_clk_gate2("esai_gate", "ipg", base + MX35_CCM_CGR0, 24);
clk[esdhc1_gate] = imx_clk_gate2("esdhc1_gate", "esdhc1_div", base + MX35_CCM_CGR0, 26);
clk[esdhc2_gate] = imx_clk_gate2("esdhc2_gate", "esdhc2_div", base + MX35_CCM_CGR0, 28);
clk[esdhc3_gate] = imx_clk_gate2("esdhc3_gate", "esdhc3_div", base + MX35_CCM_CGR0, 30);
clk[fec_gate] = imx_clk_gate2("fec_gate", "ipg", base + MX35_CCM_CGR1, 0);
clk[gpio1_gate] = imx_clk_gate2("gpio1_gate", "ipg", base + MX35_CCM_CGR1, 2);
clk[gpio2_gate] = imx_clk_gate2("gpio2_gate", "ipg", base + MX35_CCM_CGR1, 4);
clk[gpio3_gate] = imx_clk_gate2("gpio3_gate", "ipg", base + MX35_CCM_CGR1, 6);
clk[gpt_gate] = imx_clk_gate2("gpt_gate", "ipg", base + MX35_CCM_CGR1, 8);
clk[i2c1_gate] = imx_clk_gate2("i2c1_gate", "ipg_per", base + MX35_CCM_CGR1, 10);
clk[i2c2_gate] = imx_clk_gate2("i2c2_gate", "ipg_per", base + MX35_CCM_CGR1, 12);
clk[i2c3_gate] = imx_clk_gate2("i2c3_gate", "ipg_per", base + MX35_CCM_CGR1, 14);
clk[iomuxc_gate] = imx_clk_gate2("iomuxc_gate", "ipg", base + MX35_CCM_CGR1, 16);
clk[ipu_gate] = imx_clk_gate2("ipu_gate", "hsp", base + MX35_CCM_CGR1, 18);
clk[kpp_gate] = imx_clk_gate2("kpp_gate", "ipg", base + MX35_CCM_CGR1, 20);
clk[mlb_gate] = imx_clk_gate2("mlb_gate", "ahb", base + MX35_CCM_CGR1, 22);
clk[mshc_gate] = imx_clk_gate2("mshc_gate", "dummy", base + MX35_CCM_CGR1, 24);
clk[owire_gate] = imx_clk_gate2("owire_gate", "ipg_per", base + MX35_CCM_CGR1, 26);
clk[pwm_gate] = imx_clk_gate2("pwm_gate", "ipg_per", base + MX35_CCM_CGR1, 28);
clk[rngc_gate] = imx_clk_gate2("rngc_gate", "ipg", base + MX35_CCM_CGR1, 30);
clk[rtc_gate] = imx_clk_gate2("rtc_gate", "ipg", base + MX35_CCM_CGR2, 0);
clk[rtic_gate] = imx_clk_gate2("rtic_gate", "ahb", base + MX35_CCM_CGR2, 2);
clk[scc_gate] = imx_clk_gate2("scc_gate", "ipg", base + MX35_CCM_CGR2, 4);
clk[sdma_gate] = imx_clk_gate2("sdma_gate", "ahb", base + MX35_CCM_CGR2, 6);
clk[spba_gate] = imx_clk_gate2("spba_gate", "ipg", base + MX35_CCM_CGR2, 8);
clk[spdif_gate] = imx_clk_gate2("spdif_gate", "spdif_div_post", base + MX35_CCM_CGR2, 10);
clk[ssi1_gate] = imx_clk_gate2("ssi1_gate", "ssi1_div_post", base + MX35_CCM_CGR2, 12);
clk[ssi2_gate] = imx_clk_gate2("ssi2_gate", "ssi2_div_post", base + MX35_CCM_CGR2, 14);
clk[uart1_gate] = imx_clk_gate2("uart1_gate", "uart_div", base + MX35_CCM_CGR2, 16);
clk[uart2_gate] = imx_clk_gate2("uart2_gate", "uart_div", base + MX35_CCM_CGR2, 18);
clk[uart3_gate] = imx_clk_gate2("uart3_gate", "uart_div", base + MX35_CCM_CGR2, 20);
clk[usbotg_gate] = imx_clk_gate2("usbotg_gate", "ahb", base + MX35_CCM_CGR2, 22);
clk[wdog_gate] = imx_clk_gate2("wdog_gate", "ipg", base + MX35_CCM_CGR2, 24);
clk[max_gate] = imx_clk_gate2("max_gate", "dummy", base + MX35_CCM_CGR2, 26);
clk[admux_gate] = imx_clk_gate2("admux_gate", "ipg", base + MX35_CCM_CGR2, 30);
clk[csi_gate] = imx_clk_gate2("csi_gate", "csi_div", base + MX35_CCM_CGR3, 0);
clk[iim_gate] = imx_clk_gate2("iim_gate", "ipg", base + MX35_CCM_CGR3, 2);
clk[gpu2d_gate] = imx_clk_gate2("gpu2d_gate", "ahb", base + MX35_CCM_CGR3, 4);
imx_check_clocks(clk, ARRAY_SIZE(clk));
clk_prepare_enable(clk[spba_gate]);
clk_prepare_enable(clk[gpio1_gate]);
clk_prepare_enable(clk[gpio2_gate]);
clk_prepare_enable(clk[gpio3_gate]);
clk_prepare_enable(clk[iim_gate]);
clk_prepare_enable(clk[emi_gate]);
clk_prepare_enable(clk[max_gate]);
clk_prepare_enable(clk[iomuxc_gate]);
/*
* SCC is needed to boot via mmc after a watchdog reset. The clock code
* before conversion to common clk also enabled UART1 (which isn't
* handled here and not needed for mmc) and IIM (which is enabled
* unconditionally above).
*/
clk_prepare_enable(clk[scc_gate]);
imx_register_uart_clocks(uart_clks);
imx_print_silicon_rev("i.MX35", mx35_revision());
}
int __init mx35_clocks_init(void)
{
_mx35_clocks_init();
clk_register_clkdev(clk[pata_gate], NULL, "pata_imx");
clk_register_clkdev(clk[can1_gate], NULL, "flexcan.0");
clk_register_clkdev(clk[can2_gate], NULL, "flexcan.1");
clk_register_clkdev(clk[cspi1_gate], "per", "imx35-cspi.0");
clk_register_clkdev(clk[cspi1_gate], "ipg", "imx35-cspi.0");
clk_register_clkdev(clk[cspi2_gate], "per", "imx35-cspi.1");
clk_register_clkdev(clk[cspi2_gate], "ipg", "imx35-cspi.1");
clk_register_clkdev(clk[epit1_gate], NULL, "imx-epit.0");
clk_register_clkdev(clk[epit2_gate], NULL, "imx-epit.1");
clk_register_clkdev(clk[esdhc1_gate], "per", "sdhci-esdhc-imx35.0");
clk_register_clkdev(clk[ipg], "ipg", "sdhci-esdhc-imx35.0");
clk_register_clkdev(clk[ahb], "ahb", "sdhci-esdhc-imx35.0");
clk_register_clkdev(clk[esdhc2_gate], "per", "sdhci-esdhc-imx35.1");
clk_register_clkdev(clk[ipg], "ipg", "sdhci-esdhc-imx35.1");
clk_register_clkdev(clk[ahb], "ahb", "sdhci-esdhc-imx35.1");
clk_register_clkdev(clk[esdhc3_gate], "per", "sdhci-esdhc-imx35.2");
clk_register_clkdev(clk[ipg], "ipg", "sdhci-esdhc-imx35.2");
clk_register_clkdev(clk[ahb], "ahb", "sdhci-esdhc-imx35.2");
/* i.mx35 has the i.mx27 type fec */
clk_register_clkdev(clk[fec_gate], NULL, "imx27-fec.0");
clk_register_clkdev(clk[gpt_gate], "per", "imx-gpt.0");
clk_register_clkdev(clk[ipg], "ipg", "imx-gpt.0");
clk_register_clkdev(clk[i2c1_gate], NULL, "imx21-i2c.0");
clk_register_clkdev(clk[i2c2_gate], NULL, "imx21-i2c.1");
clk_register_clkdev(clk[i2c3_gate], NULL, "imx21-i2c.2");
clk_register_clkdev(clk[ipu_gate], NULL, "ipu-core");
clk_register_clkdev(clk[ipu_gate], NULL, "mx3_sdc_fb");
clk_register_clkdev(clk[kpp_gate], NULL, "imx-keypad");
clk_register_clkdev(clk[owire_gate], NULL, "mxc_w1");
clk_register_clkdev(clk[sdma_gate], NULL, "imx35-sdma");
clk_register_clkdev(clk[ssi1_gate], NULL, "imx-ssi.0");
clk_register_clkdev(clk[ssi2_gate], NULL, "imx-ssi.1");
/* i.mx35 has the i.mx21 type uart */
clk_register_clkdev(clk[uart1_gate], "per", "imx21-uart.0");
clk_register_clkdev(clk[ipg], "ipg", "imx21-uart.0");
clk_register_clkdev(clk[uart2_gate], "per", "imx21-uart.1");
clk_register_clkdev(clk[ipg], "ipg", "imx21-uart.1");
clk_register_clkdev(clk[uart3_gate], "per", "imx21-uart.2");
clk_register_clkdev(clk[ipg], "ipg", "imx21-uart.2");
/* i.mx35 has the i.mx21 type rtc */
clk_register_clkdev(clk[ckil], "ref", "imx21-rtc");
clk_register_clkdev(clk[rtc_gate], "ipg", "imx21-rtc");
clk_register_clkdev(clk[usb_div], "per", "mxc-ehci.0");
clk_register_clkdev(clk[ipg], "ipg", "mxc-ehci.0");
clk_register_clkdev(clk[usbotg_gate], "ahb", "mxc-ehci.0");
clk_register_clkdev(clk[usb_div], "per", "mxc-ehci.1");
clk_register_clkdev(clk[ipg], "ipg", "mxc-ehci.1");
clk_register_clkdev(clk[usbotg_gate], "ahb", "mxc-ehci.1");
clk_register_clkdev(clk[usb_div], "per", "mxc-ehci.2");
clk_register_clkdev(clk[ipg], "ipg", "mxc-ehci.2");
clk_register_clkdev(clk[usbotg_gate], "ahb", "mxc-ehci.2");
clk_register_clkdev(clk[usb_div], "per", "imx-udc-mx27");
clk_register_clkdev(clk[ipg], "ipg", "imx-udc-mx27");
clk_register_clkdev(clk[usbotg_gate], "ahb", "imx-udc-mx27");
clk_register_clkdev(clk[wdog_gate], NULL, "imx2-wdt.0");
clk_register_clkdev(clk[nfc_div], NULL, "imx25-nand.0");
clk_register_clkdev(clk[csi_gate], NULL, "mx3-camera.0");
clk_register_clkdev(clk[admux_gate], "audmux", NULL);
mxc_timer_init(MX35_GPT1_BASE_ADDR, MX35_INT_GPT, GPT_TYPE_IMX31);
return 0;
}
static void __init mx35_clocks_init_dt(struct device_node *ccm_node)
{
_mx35_clocks_init();
clk_data.clks = clk;
clk_data.clk_num = ARRAY_SIZE(clk);
of_clk_add_provider(ccm_node, of_clk_src_onecell_get, &clk_data);
}
CLK_OF_DECLARE(imx35, "fsl,imx35-ccm", mx35_clocks_init_dt);
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