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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: Shawn Guo <shawn.guo@linaro.org>
This commit is contained in:
Shawn Guo
parent
0a77398b5a
commit
b598b9f311
99
Documentation/devicetree/bindings/clock/imx28-clock.txt
Normal file
99
Documentation/devicetree/bindings/clock/imx28-clock.txt
Normal file
@ -0,0 +1,99 @@
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* Clock bindings for Freescale i.MX28
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Required properties:
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- compatible: Should be "fsl,imx28-clkctrl"
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- reg: Address and length of the register set
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- #clock-cells: Should be <1>
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The clock consumer should specify the desired clock by having the clock
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ID in its "clocks" phandle cell. The following is a full list of i.MX28
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clocks and IDs.
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Clock ID
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------------------
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ref_xtal 0
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pll0 1
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pll1 2
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pll2 3
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ref_cpu 4
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ref_emi 5
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ref_io0 6
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ref_io1 7
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ref_pix 8
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ref_hsadc 9
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ref_gpmi 10
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saif0_sel 11
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saif1_sel 12
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gpmi_sel 13
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ssp0_sel 14
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ssp1_sel 15
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ssp2_sel 16
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ssp3_sel 17
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emi_sel 18
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etm_sel 19
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lcdif_sel 20
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cpu 21
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ptp_sel 22
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cpu_pll 23
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cpu_xtal 24
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hbus 25
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xbus 26
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ssp0_div 27
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ssp1_div 28
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ssp2_div 29
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ssp3_div 30
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gpmi_div 31
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emi_pll 32
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emi_xtal 33
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lcdif_div 34
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etm_div 35
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ptp 36
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saif0_div 37
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saif1_div 38
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clk32k_div 39
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rtc 40
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lradc 41
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spdif_div 42
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clk32k 43
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pwm 44
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uart 45
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ssp0 46
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ssp1 47
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ssp2 48
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ssp3 49
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gpmi 50
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spdif 51
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emi 52
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saif0 53
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saif1 54
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lcdif 55
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etm 56
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fec 57
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can0 58
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can1 59
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usb0 60
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usb1 61
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usb0_pwr 62
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usb1_pwr 63
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enet_out 64
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Examples:
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clks: clkctrl@80040000 {
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compatible = "fsl,imx28-clkctrl";
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reg = <0x80040000 0x2000>;
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#clock-cells = <1>;
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clock-output-names =
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...
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"uart", /* 45 */
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...
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"end_of_list";
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};
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auart0: serial@8006a000 {
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compatible = "fsl,imx28-auart", "fsl,imx23-auart";
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reg = <0x8006a000 0x2000>;
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interrupts = <112 70 71>;
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clocks = <&clks 45>;
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status = "disabled";
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};
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@ -65,6 +65,7 @@
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dma-apbh@80004000 {
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compatible = "fsl,imx28-dma-apbh";
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reg = <0x80004000 0x2000>;
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clocks = <&clks 25>;
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};
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perfmon@80006000 {
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@ -81,6 +82,7 @@
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reg-names = "gpmi-nand", "bch";
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interrupts = <88>, <41>;
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interrupt-names = "gpmi-dma", "bch";
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clocks = <&clks 50>;
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fsl,gpmi-dma-channel = <4>;
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status = "disabled";
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};
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@ -90,6 +92,7 @@
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#size-cells = <0>;
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reg = <0x80010000 0x2000>;
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interrupts = <96 82>;
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clocks = <&clks 46>;
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fsl,ssp-dma-channel = <0>;
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status = "disabled";
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};
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@ -99,6 +102,7 @@
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#size-cells = <0>;
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reg = <0x80012000 0x2000>;
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interrupts = <97 83>;
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clocks = <&clks 47>;
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fsl,ssp-dma-channel = <1>;
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status = "disabled";
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};
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@ -108,6 +112,7 @@
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#size-cells = <0>;
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reg = <0x80014000 0x2000>;
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interrupts = <98 84>;
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clocks = <&clks 48>;
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fsl,ssp-dma-channel = <2>;
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status = "disabled";
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};
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@ -117,6 +122,7 @@
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#size-cells = <0>;
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reg = <0x80016000 0x2000>;
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interrupts = <99 85>;
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clocks = <&clks 49>;
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fsl,ssp-dma-channel = <3>;
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status = "disabled";
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};
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@ -606,6 +612,7 @@
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dma-apbx@80024000 {
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compatible = "fsl,imx28-dma-apbx";
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reg = <0x80024000 0x2000>;
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clocks = <&clks 26>;
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};
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dcp@80028000 {
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@ -634,6 +641,7 @@
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compatible = "fsl,imx28-lcdif";
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reg = <0x80030000 0x2000>;
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interrupts = <38 86>;
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clocks = <&clks 55>;
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status = "disabled";
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};
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@ -641,6 +649,8 @@
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compatible = "fsl,imx28-flexcan", "fsl,p1010-flexcan";
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reg = <0x80032000 0x2000>;
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interrupts = <8>;
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clocks = <&clks 58>, <&clks 58>;
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clock-names = "ipg", "per";
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status = "disabled";
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};
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@ -648,6 +658,8 @@
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compatible = "fsl,imx28-flexcan", "fsl,p1010-flexcan";
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reg = <0x80034000 0x2000>;
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interrupts = <9>;
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clocks = <&clks 59>, <&clks 59>;
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clock-names = "ipg", "per";
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status = "disabled";
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};
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@ -694,15 +706,17 @@
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reg = <0x80040000 0x40000>;
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ranges;
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clkctl@80040000 {
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clks: clkctrl@80040000 {
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compatible = "fsl,imx28-clkctrl";
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reg = <0x80040000 0x2000>;
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status = "disabled";
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#clock-cells = <1>;
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};
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saif0: saif@80042000 {
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compatible = "fsl,imx28-saif";
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reg = <0x80042000 0x2000>;
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interrupts = <59 80>;
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clocks = <&clks 53>;
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fsl,saif-dma-channel = <4>;
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status = "disabled";
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};
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@ -716,6 +730,7 @@
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compatible = "fsl,imx28-saif";
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reg = <0x80046000 0x2000>;
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interrupts = <58 81>;
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clocks = <&clks 54>;
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fsl,saif-dma-channel = <5>;
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status = "disabled";
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};
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@ -763,6 +778,7 @@
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pwm: pwm@80064000 {
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compatible = "fsl,imx28-pwm", "fsl,imx23-pwm";
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reg = <0x80064000 0x2000>;
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clocks = <&clks 44>;
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#pwm-cells = <2>;
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fsl,pwm-number = <8>;
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status = "disabled";
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@ -777,6 +793,7 @@
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compatible = "fsl,imx28-auart", "fsl,imx23-auart";
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reg = <0x8006a000 0x2000>;
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interrupts = <112 70 71>;
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clocks = <&clks 45>;
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status = "disabled";
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};
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@ -784,6 +801,7 @@
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compatible = "fsl,imx28-auart", "fsl,imx23-auart";
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reg = <0x8006c000 0x2000>;
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interrupts = <113 72 73>;
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clocks = <&clks 45>;
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status = "disabled";
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};
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@ -791,6 +809,7 @@
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compatible = "fsl,imx28-auart", "fsl,imx23-auart";
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reg = <0x8006e000 0x2000>;
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interrupts = <114 74 75>;
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clocks = <&clks 45>;
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status = "disabled";
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};
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@ -798,6 +817,7 @@
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compatible = "fsl,imx28-auart", "fsl,imx23-auart";
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reg = <0x80070000 0x2000>;
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interrupts = <115 76 77>;
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clocks = <&clks 45>;
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status = "disabled";
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};
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@ -805,6 +825,7 @@
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compatible = "fsl,imx28-auart", "fsl,imx23-auart";
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reg = <0x80072000 0x2000>;
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interrupts = <116 78 79>;
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clocks = <&clks 45>;
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status = "disabled";
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};
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@ -812,18 +833,22 @@
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compatible = "arm,pl011", "arm,primecell";
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reg = <0x80074000 0x1000>;
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interrupts = <47>;
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clocks = <&clks 45>, <&clks 26>;
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clock-names = "uart", "apb_pclk";
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status = "disabled";
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};
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usbphy0: usbphy@8007c000 {
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compatible = "fsl,imx28-usbphy", "fsl,imx23-usbphy";
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reg = <0x8007c000 0x2000>;
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clocks = <&clks 62>;
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status = "disabled";
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};
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usbphy1: usbphy@8007e000 {
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compatible = "fsl,imx28-usbphy", "fsl,imx23-usbphy";
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reg = <0x8007e000 0x2000>;
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clocks = <&clks 63>;
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status = "disabled";
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};
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};
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@ -840,6 +865,7 @@
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compatible = "fsl,imx28-usb", "fsl,imx27-usb";
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reg = <0x80080000 0x10000>;
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interrupts = <93>;
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clocks = <&clks 60>;
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fsl,usbphy = <&usbphy0>;
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status = "disabled";
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};
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@ -848,6 +874,7 @@
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compatible = "fsl,imx28-usb", "fsl,imx27-usb";
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reg = <0x80090000 0x10000>;
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interrupts = <92>;
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clocks = <&clks 61>;
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fsl,usbphy = <&usbphy1>;
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status = "disabled";
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};
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@ -861,6 +888,8 @@
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compatible = "fsl,imx28-fec";
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reg = <0x800f0000 0x4000>;
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interrupts = <101>;
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clocks = <&clks 57>, <&clks 57>;
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clock-names = "ipg", "ahb";
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status = "disabled";
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};
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@ -868,6 +897,8 @@
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compatible = "fsl,imx28-fec";
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reg = <0x800f4000 0x4000>;
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interrupts = <102>;
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clocks = <&clks 57>, <&clks 57>;
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clock-names = "ipg", "ahb";
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status = "disabled";
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};
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@ -14,6 +14,7 @@
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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 <mach/common.h>
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#include <mach/mx28.h>
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#include "clk.h"
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@ -120,90 +121,6 @@ static void __init clk_misc_init(void)
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writel_relaxed(val, FRAC0);
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}
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static struct clk_lookup uart_lookups[] = {
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{ .dev_id = "duart", },
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{ .dev_id = "mxs-auart.0", },
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{ .dev_id = "mxs-auart.1", },
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{ .dev_id = "mxs-auart.2", },
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{ .dev_id = "mxs-auart.3", },
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{ .dev_id = "mxs-auart.4", },
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{ .dev_id = "8006a000.serial", },
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{ .dev_id = "8006c000.serial", },
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{ .dev_id = "8006e000.serial", },
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{ .dev_id = "80070000.serial", },
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{ .dev_id = "80072000.serial", },
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{ .dev_id = "80074000.serial", },
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};
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static struct clk_lookup hbus_lookups[] = {
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{ .dev_id = "imx28-dma-apbh", },
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{ .dev_id = "80004000.dma-apbh", },
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};
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static struct clk_lookup xbus_lookups[] = {
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{ .dev_id = "duart", .con_id = "apb_pclk"},
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{ .dev_id = "80074000.serial", .con_id = "apb_pclk"},
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{ .dev_id = "imx28-dma-apbx", },
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{ .dev_id = "80024000.dma-apbx", },
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};
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static struct clk_lookup ssp0_lookups[] = {
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{ .dev_id = "imx28-mmc.0", },
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{ .dev_id = "80010000.ssp", },
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};
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static struct clk_lookup ssp1_lookups[] = {
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{ .dev_id = "imx28-mmc.1", },
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{ .dev_id = "80012000.ssp", },
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};
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static struct clk_lookup ssp2_lookups[] = {
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{ .dev_id = "imx28-mmc.2", },
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{ .dev_id = "80014000.ssp", },
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};
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static struct clk_lookup ssp3_lookups[] = {
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{ .dev_id = "imx28-mmc.3", },
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{ .dev_id = "80016000.ssp", },
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};
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static struct clk_lookup lcdif_lookups[] = {
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{ .dev_id = "imx28-fb", },
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{ .dev_id = "80030000.lcdif", },
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};
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static struct clk_lookup gpmi_lookups[] = {
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{ .dev_id = "imx28-gpmi-nand", },
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{ .dev_id = "8000c000.gpmi-nand", },
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};
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static struct clk_lookup fec_lookups[] = {
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{ .dev_id = "imx28-fec.0", },
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{ .dev_id = "imx28-fec.1", },
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{ .dev_id = "800f0000.ethernet", },
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{ .dev_id = "800f4000.ethernet", },
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};
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static struct clk_lookup can0_lookups[] = {
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{ .dev_id = "flexcan.0", },
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{ .dev_id = "80032000.can", },
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};
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static struct clk_lookup can1_lookups[] = {
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{ .dev_id = "flexcan.1", },
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{ .dev_id = "80034000.can", },
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};
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static struct clk_lookup saif0_lookups[] = {
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{ .dev_id = "mxs-saif.0", },
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{ .dev_id = "80042000.saif", },
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};
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static struct clk_lookup saif1_lookups[] = {
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{ .dev_id = "mxs-saif.1", },
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{ .dev_id = "80046000.saif", },
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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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@ -228,6 +145,7 @@ enum imx28_clk {
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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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@ -235,6 +153,7 @@ static enum imx28_clk clks_init_on[] __initdata = {
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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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int i;
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clk_misc_init();
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@ -312,27 +231,15 @@ int __init mx28_clocks_init(void)
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return PTR_ERR(clks[i]);
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}
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np = of_find_compatible_node(NULL, NULL, "fsl,imx28-clkctrl");
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if (np) {
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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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}
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clk_register_clkdev(clks[clk32k], NULL, "timrot");
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clk_register_clkdev(clks[enet_out], NULL, "enet_out");
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clk_register_clkdev(clks[pwm], NULL, "80064000.pwm");
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clk_register_clkdevs(clks[hbus], hbus_lookups, ARRAY_SIZE(hbus_lookups));
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clk_register_clkdevs(clks[xbus], xbus_lookups, ARRAY_SIZE(xbus_lookups));
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clk_register_clkdevs(clks[uart], uart_lookups, ARRAY_SIZE(uart_lookups));
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clk_register_clkdevs(clks[ssp0], ssp0_lookups, ARRAY_SIZE(ssp0_lookups));
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clk_register_clkdevs(clks[ssp1], ssp1_lookups, ARRAY_SIZE(ssp1_lookups));
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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]]);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user