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Date: Wed, 29 Oct 2008 14:43:32 +0100
From: "Henk Stegeman" <henk.stegeman@gmail.com>
To: linuxppc-dev@ozlabs.org
Subject: Chipselect in SPI binding with mpc5200-psc-spi
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..
..
In my dts

I have my chipselect defined as follows:

        gpt4: timer@640 {    // General Purpose Timer GPT4 in GPIO mode for
SMC4000IO chip select.
            compatible = "fsl,mpc5200b-gpt-gpio","fsl,mpc5200-gpt-gpio";
            cell-index = <4>;
            reg = <0x640 0x10>;
            interrupts = <1 13 0>;
            interrupt-parent = <&mpc5200_pic>;
            gpio-controller;
            #gpio-cells = <2>;
        };

I found the gpio in
# cat /sys/class/gpio/gpiochip215/label
/soc5200@f0000000/timer@640

The spi controller is defined like this:

        spi@2400 {
            device_type = "spi";
            #address-cells = <1>;
            #size-cells = <0>;
            compatible = "fsl,mpc5200-psc-spi","fsl,mpc5200b-psc-spi";
            cell-index = <2>;
            reg = <2400 100>;
            interrupts = <2 3 0>;
            interrupt-parent = <&mpc5200_pic>;
            gpios = <&gpt4 0 0>;

            io-controller@0 {
                compatible = "microkey,smc4000io";
                spi-max-frequency = <1000000>;
                reg = <0>;
            };
        };

At bootup linux (2.6.27) reports:

mpc52xx-psc-spi f0000960.spi: probe called without platform data, no
(de)activate_cs function will be called.

Is my assumption wrong that the gpios property is the way to map chipselects
to the spi driver?

Thanks in advance.
Henk.

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..<br>..<br>In my dts<br><br>I have my chipselect defined as follows:<br><br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; gpt4: timer@640 {&nbsp;&nbsp;&nbsp; // General Purpose Timer GPT4 in GPIO mode for SMC4000IO chip select.<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; compatible = &quot;fsl,mpc5200b-gpt-gpio&quot;,&quot;fsl,mpc5200-gpt-gpio&quot;;<br>
&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; cell-index = &lt;4&gt;;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; reg = &lt;0x640 0x10&gt;;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; interrupts = &lt;1 13 0&gt;;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; interrupt-parent = &lt;&amp;mpc5200_pic&gt;;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; gpio-controller;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; #gpio-cells = &lt;2&gt;;<br>
&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; };<br><br>I found the gpio in<br>
# cat /sys/class/gpio/gpiochip215/label<br>
/soc5200@f0000000/timer@640<br>
<br>The spi controller is defined like this:<br><br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; spi@2400 {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; device_type = &quot;spi&quot;;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; #address-cells = &lt;1&gt;;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; #size-cells = &lt;0&gt;;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; compatible = &quot;fsl,mpc5200-psc-spi&quot;,&quot;fsl,mpc5200b-psc-spi&quot;;<br>
&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; cell-index = &lt;2&gt;;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; reg = &lt;2400 100&gt;;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; interrupts = &lt;2 3 0&gt;;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; interrupt-parent = &lt;&amp;mpc5200_pic&gt;;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; gpios = &lt;&amp;gpt4 0 0&gt;;<br>
<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; io-controller@0 {<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; compatible = &quot;microkey,smc4000io&quot;;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; spi-max-frequency = &lt;1000000&gt;;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; reg = &lt;0&gt;;<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; };<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; };<br>
<br>At bootup linux (2.6.27) reports:<br><br>mpc52xx-psc-spi f0000960.spi: probe called without platform data, no (de)activate_cs function will be called.<br><br>Is my assumption wrong that the gpios property is the way to map chipselects to the spi driver?<br>
<br>Thanks in advance.<br>Henk.<br><br><br>

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