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Fixed MTP to work with TWRP
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110
Documentation/devicetree/bindings/clock/zynq-7000.txt
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110
Documentation/devicetree/bindings/clock/zynq-7000.txt
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Device Tree Clock bindings for the Zynq 7000 EPP
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The Zynq EPP has several different clk providers, each with there own bindings.
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The purpose of this document is to document their usage.
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See clock_bindings.txt for more information on the generic clock bindings.
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See Chapter 25 of Zynq TRM for more information about Zynq clocks.
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== Clock Controller ==
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The clock controller is a logical abstraction of Zynq's clock tree. It reads
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required input clock frequencies from the devicetree and acts as clock provider
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for all clock consumers of PS clocks.
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Required properties:
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- #clock-cells : Must be 1
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- compatible : "xlnx,ps7-clkc"
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- reg : SLCR offset and size taken via syscon < 0x100 0x100 >
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- ps-clk-frequency : Frequency of the oscillator providing ps_clk in HZ
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(usually 33 MHz oscillators are used for Zynq platforms)
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- clock-output-names : List of strings used to name the clock outputs. Shall be
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a list of the outputs given below.
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Optional properties:
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- clocks : as described in the clock bindings
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- clock-names : as described in the clock bindings
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- fclk-enable : Bit mask to enable FCLKs statically at boot time.
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Bit [0..3] correspond to FCLK0..FCLK3. The corresponding
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FCLK will only be enabled if it is actually running at
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boot time.
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Clock inputs:
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The following strings are optional parameters to the 'clock-names' property in
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order to provide an optional (E)MIO clock source.
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- swdt_ext_clk
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- gem0_emio_clk
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- gem1_emio_clk
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- mio_clk_XX # with XX = 00..53
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...
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Clock outputs:
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0: armpll
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1: ddrpll
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2: iopll
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3: cpu_6or4x
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4: cpu_3or2x
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5: cpu_2x
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6: cpu_1x
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7: ddr2x
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8: ddr3x
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9: dci
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10: lqspi
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11: smc
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12: pcap
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13: gem0
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14: gem1
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15: fclk0
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16: fclk1
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17: fclk2
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18: fclk3
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19: can0
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20: can1
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21: sdio0
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22: sdio1
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23: uart0
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24: uart1
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25: spi0
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26: spi1
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27: dma
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28: usb0_aper
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29: usb1_aper
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30: gem0_aper
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31: gem1_aper
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32: sdio0_aper
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33: sdio1_aper
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34: spi0_aper
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35: spi1_aper
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36: can0_aper
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37: can1_aper
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38: i2c0_aper
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39: i2c1_aper
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40: uart0_aper
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41: uart1_aper
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42: gpio_aper
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43: lqspi_aper
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44: smc_aper
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45: swdt
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46: dbg_trc
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47: dbg_apb
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Example:
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clkc: clkc@100 {
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#clock-cells = <1>;
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compatible = "xlnx,ps7-clkc";
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ps-clk-frequency = <33333333>;
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reg = <0x100 0x100>;
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clock-output-names = "armpll", "ddrpll", "iopll", "cpu_6or4x",
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"cpu_3or2x", "cpu_2x", "cpu_1x", "ddr2x", "ddr3x",
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"dci", "lqspi", "smc", "pcap", "gem0", "gem1",
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"fclk0", "fclk1", "fclk2", "fclk3", "can0", "can1",
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"sdio0", "sdio1", "uart0", "uart1", "spi0", "spi1",
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"dma", "usb0_aper", "usb1_aper", "gem0_aper",
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"gem1_aper", "sdio0_aper", "sdio1_aper",
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"spi0_aper", "spi1_aper", "can0_aper", "can1_aper",
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"i2c0_aper", "i2c1_aper", "uart0_aper", "uart1_aper",
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"gpio_aper", "lqspi_aper", "smc_aper", "swdt",
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"dbg_trc", "dbg_apb";
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# optional props
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clocks = <&clkc 16>, <&clk_foo>;
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clock-names = "gem1_emio_clk", "can_mio_clk_23";
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};
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