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Commit b598b9f3 authored by Shawn Guo's avatar Shawn Guo
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clk: mxs: replace imx28 clk_register_clkdev with clock DT lookup 

It really becomes a maintenance issue that every time a device needs
to look up (clk_get) a clock we have to patch kernel clock file to call
clk_register_clkdev for that clock.

Since clock DT support which is meant to resolve clock lookup in device
tree is in place, the patch moves imx28 client devices' clock lookup
over to device tree, so that any new lookup to be added at later time
can just get done in DT instead of kernel.
Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
parent 0a77398b
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Showing with 142 additions and 105 deletions
Documentation/devicetree/bindings/clock/imx28-clock.txt 0 → 100644
View file @ b598b9f3
* Clock bindings for Freescale i.MX28
Required properties:
- compatible: Should be "fsl,imx28-clkctrl"
- reg: Address and length of the register set
- #clock-cells: Should be <1>
The clock consumer should specify the desired clock by having the clock
ID in its "clocks" phandle cell. The following is a full list of i.MX28
clocks and IDs.
Clock ID
------------------
ref_xtal 0
pll0 1
pll1 2
pll2 3
ref_cpu 4
ref_emi 5
ref_io0 6
ref_io1 7
ref_pix 8
ref_hsadc 9
ref_gpmi 10
saif0_sel 11
saif1_sel 12
gpmi_sel 13
ssp0_sel 14
ssp1_sel 15
ssp2_sel 16
ssp3_sel 17
emi_sel 18
etm_sel 19
lcdif_sel 20
cpu 21
ptp_sel 22
cpu_pll 23
cpu_xtal 24
hbus 25
xbus 26
ssp0_div 27
ssp1_div 28
ssp2_div 29
ssp3_div 30
gpmi_div 31
emi_pll 32
emi_xtal 33
lcdif_div 34
etm_div 35
ptp 36
saif0_div 37
saif1_div 38
clk32k_div 39
rtc 40
lradc 41
spdif_div 42
clk32k 43
pwm 44
uart 45
ssp0 46
ssp1 47
ssp2 48
ssp3 49
gpmi 50
spdif 51
emi 52
saif0 53
saif1 54
lcdif 55
etm 56
fec 57
can0 58
can1 59
usb0 60
usb1 61
usb0_pwr 62
usb1_pwr 63
enet_out 64
Examples:
clks: clkctrl@80040000 {
compatible = "fsl,imx28-clkctrl";
reg = <0x80040000 0x2000>;
#clock-cells = <1>;
clock-output-names =
...
"uart", /* 45 */
...
"end_of_list";
};
auart0: serial@8006a000 {
compatible = "fsl,imx28-auart", "fsl,imx23-auart";
reg = <0x8006a000 0x2000>;
interrupts = <112 70 71>;
clocks = <&clks 45>;
status = "disabled";
};
arch/arm/boot/dts/imx28.dtsi
View file @ b598b9f3
......@@ -65,6 +65,7 @@ hsadc@80002000 {
dma-apbh@80004000 {
compatible = "fsl,imx28-dma-apbh";
reg = <0x80004000 0x2000>;
clocks = <&clks 25>;
};
perfmon@80006000 {
......@@ -81,6 +82,7 @@ gpmi-nand@8000c000 {
reg-names = "gpmi-nand", "bch";
interrupts = <88>, <41>;
interrupt-names = "gpmi-dma", "bch";
clocks = <&clks 50>;
fsl,gpmi-dma-channel = <4>;
status = "disabled";
};
......@@ -90,6 +92,7 @@ ssp0: ssp@80010000 {
#size-cells = <0>;
reg = <0x80010000 0x2000>;
interrupts = <96 82>;
clocks = <&clks 46>;
fsl,ssp-dma-channel = <0>;
status = "disabled";
};
......@@ -99,6 +102,7 @@ ssp1: ssp@80012000 {
#size-cells = <0>;
reg = <0x80012000 0x2000>;
interrupts = <97 83>;
clocks = <&clks 47>;
fsl,ssp-dma-channel = <1>;
status = "disabled";
};
......@@ -108,6 +112,7 @@ ssp2: ssp@80014000 {
#size-cells = <0>;
reg = <0x80014000 0x2000>;
interrupts = <98 84>;
clocks = <&clks 48>;
fsl,ssp-dma-channel = <2>;
status = "disabled";
};
......@@ -117,6 +122,7 @@ ssp3: ssp@80016000 {
#size-cells = <0>;
reg = <0x80016000 0x2000>;
interrupts = <99 85>;
clocks = <&clks 49>;
fsl,ssp-dma-channel = <3>;
status = "disabled";
};
......@@ -606,6 +612,7 @@ etm@80022000 {
dma-apbx@80024000 {
compatible = "fsl,imx28-dma-apbx";
reg = <0x80024000 0x2000>;
clocks = <&clks 26>;
};
dcp@80028000 {
......@@ -634,6 +641,7 @@ lcdif@80030000 {
compatible = "fsl,imx28-lcdif";
reg = <0x80030000 0x2000>;
interrupts = <38 86>;
clocks = <&clks 55>;
status = "disabled";
};
......@@ -641,6 +649,8 @@ can0: can@80032000 {
compatible = "fsl,imx28-flexcan", "fsl,p1010-flexcan";
reg = <0x80032000 0x2000>;
interrupts = <8>;
clocks = <&clks 58>, <&clks 58>;
clock-names = "ipg", "per";
status = "disabled";
};
......@@ -648,6 +658,8 @@ can1: can@80034000 {
compatible = "fsl,imx28-flexcan", "fsl,p1010-flexcan";
reg = <0x80034000 0x2000>;
interrupts = <9>;
clocks = <&clks 59>, <&clks 59>;
clock-names = "ipg", "per";
status = "disabled";
};
......@@ -694,15 +706,17 @@ apbx@80040000 {
reg = <0x80040000 0x40000>;
ranges;
clkctl@80040000 {
clks: clkctrl@80040000 {
compatible = "fsl,imx28-clkctrl";
reg = <0x80040000 0x2000>;
status = "disabled";
#clock-cells = <1>;
};
saif0: saif@80042000 {
compatible = "fsl,imx28-saif";
reg = <0x80042000 0x2000>;
interrupts = <59 80>;
clocks = <&clks 53>;
fsl,saif-dma-channel = <4>;
status = "disabled";
};
......@@ -716,6 +730,7 @@ saif1: saif@80046000 {
compatible = "fsl,imx28-saif";
reg = <0x80046000 0x2000>;
interrupts = <58 81>;
clocks = <&clks 54>;
fsl,saif-dma-channel = <5>;
status = "disabled";
};
......@@ -763,6 +778,7 @@ i2c1: i2c@8005a000 {
pwm: pwm@80064000 {
compatible = "fsl,imx28-pwm", "fsl,imx23-pwm";
reg = <0x80064000 0x2000>;
clocks = <&clks 44>;
#pwm-cells = <2>;
fsl,pwm-number = <8>;
status = "disabled";
......@@ -777,6 +793,7 @@ auart0: serial@8006a000 {
compatible = "fsl,imx28-auart", "fsl,imx23-auart";
reg = <0x8006a000 0x2000>;
interrupts = <112 70 71>;
clocks = <&clks 45>;
status = "disabled";
};
......@@ -784,6 +801,7 @@ auart1: serial@8006c000 {
compatible = "fsl,imx28-auart", "fsl,imx23-auart";
reg = <0x8006c000 0x2000>;
interrupts = <113 72 73>;
clocks = <&clks 45>;
status = "disabled";
};
......@@ -791,6 +809,7 @@ auart2: serial@8006e000 {
compatible = "fsl,imx28-auart", "fsl,imx23-auart";
reg = <0x8006e000 0x2000>;
interrupts = <114 74 75>;
clocks = <&clks 45>;
status = "disabled";
};
......@@ -798,6 +817,7 @@ auart3: serial@80070000 {
compatible = "fsl,imx28-auart", "fsl,imx23-auart";
reg = <0x80070000 0x2000>;
interrupts = <115 76 77>;
clocks = <&clks 45>;
status = "disabled";
};
......@@ -805,6 +825,7 @@ auart4: serial@80072000 {
compatible = "fsl,imx28-auart", "fsl,imx23-auart";
reg = <0x80072000 0x2000>;
interrupts = <116 78 79>;
clocks = <&clks 45>;
status = "disabled";
};
......@@ -812,18 +833,22 @@ duart: serial@80074000 {
compatible = "arm,pl011", "arm,primecell";
reg = <0x80074000 0x1000>;
interrupts = <47>;
clocks = <&clks 45>, <&clks 26>;
clock-names = "uart", "apb_pclk";
status = "disabled";
};
usbphy0: usbphy@8007c000 {
compatible = "fsl,imx28-usbphy", "fsl,imx23-usbphy";
reg = <0x8007c000 0x2000>;
clocks = <&clks 62>;
status = "disabled";
};
usbphy1: usbphy@8007e000 {
compatible = "fsl,imx28-usbphy", "fsl,imx23-usbphy";
reg = <0x8007e000 0x2000>;
clocks = <&clks 63>;
status = "disabled";
};
};
......@@ -840,6 +865,7 @@ usb0: usb@80080000 {
compatible = "fsl,imx28-usb", "fsl,imx27-usb";
reg = <0x80080000 0x10000>;
interrupts = <93>;
clocks = <&clks 60>;
fsl,usbphy = <&usbphy0>;
status = "disabled";
};
......@@ -848,6 +874,7 @@ usb1: usb@80090000 {
compatible = "fsl,imx28-usb", "fsl,imx27-usb";
reg = <0x80090000 0x10000>;
interrupts = <92>;
clocks = <&clks 61>;
fsl,usbphy = <&usbphy1>;
status = "disabled";
};
......@@ -861,6 +888,8 @@ mac0: ethernet@800f0000 {
compatible = "fsl,imx28-fec";
reg = <0x800f0000 0x4000>;
interrupts = <101>;
clocks = <&clks 57>, <&clks 57>;
clock-names = "ipg", "ahb";
status = "disabled";
};
......@@ -868,6 +897,8 @@ mac1: ethernet@800f4000 {
compatible = "fsl,imx28-fec";
reg = <0x800f4000 0x4000>;
interrupts = <102>;
clocks = <&clks 57>, <&clks 57>;
clock-names = "ipg", "ahb";
status = "disabled";
};
......
drivers/clk/mxs/clk-imx28.c
View file @ b598b9f3
......@@ -14,6 +14,7 @@
#include <linux/err.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/of.h>
#include <mach/common.h>
#include <mach/mx28.h>
#include "clk.h"
......@@ -120,90 +121,6 @@ static void __init clk_misc_init(void)
writel_relaxed(val, FRAC0);
}
static struct clk_lookup uart_lookups[] = {
{ .dev_id = "duart", },
{ .dev_id = "mxs-auart.0", },
{ .dev_id = "mxs-auart.1", },
{ .dev_id = "mxs-auart.2", },
{ .dev_id = "mxs-auart.3", },
{ .dev_id = "mxs-auart.4", },
{ .dev_id = "8006a000.serial", },
{ .dev_id = "8006c000.serial", },
{ .dev_id = "8006e000.serial", },
{ .dev_id = "80070000.serial", },
{ .dev_id = "80072000.serial", },
{ .dev_id = "80074000.serial", },
};
static struct clk_lookup hbus_lookups[] = {
{ .dev_id = "imx28-dma-apbh", },
{ .dev_id = "80004000.dma-apbh", },
};
static struct clk_lookup xbus_lookups[] = {
{ .dev_id = "duart", .con_id = "apb_pclk"},
{ .dev_id = "80074000.serial", .con_id = "apb_pclk"},
{ .dev_id = "imx28-dma-apbx", },
{ .dev_id = "80024000.dma-apbx", },
};
static struct clk_lookup ssp0_lookups[] = {
{ .dev_id = "imx28-mmc.0", },
{ .dev_id = "80010000.ssp", },
};
static struct clk_lookup ssp1_lookups[] = {
{ .dev_id = "imx28-mmc.1", },
{ .dev_id = "80012000.ssp", },
};
static struct clk_lookup ssp2_lookups[] = {
{ .dev_id = "imx28-mmc.2", },
{ .dev_id = "80014000.ssp", },
};
static struct clk_lookup ssp3_lookups[] = {
{ .dev_id = "imx28-mmc.3", },
{ .dev_id = "80016000.ssp", },
};
static struct clk_lookup lcdif_lookups[] = {
{ .dev_id = "imx28-fb", },
{ .dev_id = "80030000.lcdif", },
};
static struct clk_lookup gpmi_lookups[] = {
{ .dev_id = "imx28-gpmi-nand", },
{ .dev_id = "8000c000.gpmi-nand", },
};
static struct clk_lookup fec_lookups[] = {
{ .dev_id = "imx28-fec.0", },
{ .dev_id = "imx28-fec.1", },
{ .dev_id = "800f0000.ethernet", },
{ .dev_id = "800f4000.ethernet", },
};
static struct clk_lookup can0_lookups[] = {
{ .dev_id = "flexcan.0", },
{ .dev_id = "80032000.can", },
};
static struct clk_lookup can1_lookups[] = {
{ .dev_id = "flexcan.1", },
{ .dev_id = "80034000.can", },
};
static struct clk_lookup saif0_lookups[] = {
{ .dev_id = "mxs-saif.0", },
{ .dev_id = "80042000.saif", },
};
static struct clk_lookup saif1_lookups[] = {
{ .dev_id = "mxs-saif.1", },
{ .dev_id = "80046000.saif", },
};
static const char *sel_cpu[] __initconst = { "ref_cpu", "ref_xtal", };
static const char *sel_io0[] __initconst = { "ref_io0", "ref_xtal", };
static const char *sel_io1[] __initconst = { "ref_io1", "ref_xtal", };
......@@ -228,6 +145,7 @@ enum imx28_clk {
};
static struct clk *clks[clk_max];
static struct clk_onecell_data clk_data;
static enum imx28_clk clks_init_on[] __initdata = {
cpu, hbus, xbus, emi, uart,
......@@ -235,6 +153,7 @@ static enum imx28_clk clks_init_on[] __initdata = {
int __init mx28_clocks_init(void)
{
struct device_node *np;
int i;
clk_misc_init();
......@@ -312,27 +231,15 @@ int __init mx28_clocks_init(void)
return PTR_ERR(clks[i]);
}
np = of_find_compatible_node(NULL, NULL, "fsl,imx28-clkctrl");
if (np) {
clk_data.clks = clks;
clk_data.clk_num = ARRAY_SIZE(clks);
of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
}
clk_register_clkdev(clks[clk32k], NULL, "timrot");
clk_register_clkdev(clks[enet_out], NULL, "enet_out");
clk_register_clkdev(clks[pwm], NULL, "80064000.pwm");
clk_register_clkdevs(clks[hbus], hbus_lookups, ARRAY_SIZE(hbus_lookups));
clk_register_clkdevs(clks[xbus], xbus_lookups, ARRAY_SIZE(xbus_lookups));
clk_register_clkdevs(clks[uart], uart_lookups, ARRAY_SIZE(uart_lookups));
clk_register_clkdevs(clks[ssp0], ssp0_lookups, ARRAY_SIZE(ssp0_lookups));
clk_register_clkdevs(clks[ssp1], ssp1_lookups, ARRAY_SIZE(ssp1_lookups));
clk_register_clkdevs(clks[ssp2], ssp2_lookups, ARRAY_SIZE(ssp2_lookups));
clk_register_clkdevs(clks[ssp3], ssp3_lookups, ARRAY_SIZE(ssp3_lookups));
clk_register_clkdevs(clks[gpmi], gpmi_lookups, ARRAY_SIZE(gpmi_lookups));
clk_register_clkdevs(clks[saif0], saif0_lookups, ARRAY_SIZE(saif0_lookups));
clk_register_clkdevs(clks[saif1], saif1_lookups, ARRAY_SIZE(saif1_lookups));
clk_register_clkdevs(clks[lcdif], lcdif_lookups, ARRAY_SIZE(lcdif_lookups));
clk_register_clkdevs(clks[fec], fec_lookups, ARRAY_SIZE(fec_lookups));
clk_register_clkdevs(clks[can0], can0_lookups, ARRAY_SIZE(can0_lookups));
clk_register_clkdevs(clks[can1], can1_lookups, ARRAY_SIZE(can1_lookups));
clk_register_clkdev(clks[usb0_pwr], NULL, "8007c000.usbphy");
clk_register_clkdev(clks[usb1_pwr], NULL, "8007e000.usbphy");
clk_register_clkdev(clks[usb0], NULL, "80080000.usb");
clk_register_clkdev(clks[usb1], NULL, "80090000.usb");
for (i = 0; i < ARRAY_SIZE(clks_init_on); i++)
clk_prepare_enable(clks[clks_init_on[i]]);
......
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