Bureaucrats, dave_user, Administrators
8,157
edits
Changes
Created page with "<section begin=History/> {| style="border-collapse:collapse; " !colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History |- !style="border-le..."
<section begin=History/>
{| style="border-collapse:collapse; "
!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
|-
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Issue Date
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Notes
|-
| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |2024/04/08
| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |DESK-MX8M-L-4.1.0 release
|-
|}
<section end=History/>
<section begin=Body/>
==Peripheral WiFi==
=== Device tree configuration ===
Here below an example of device tree configuration used on standard DAVE's kit for the MITO 8M Mini:
From <code>imx8mm-mito8mmini.dts</code>:
<pre>
...
...
pcie0_refclk: pcie0-refclk {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <100000000>;
};
...
...
regulators {
...
reg_pcie_pwr: pcie_pwr {
compatible = "regulator-fixed";
regulator-name = "PCIe_PWREN";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
gpio = <&gpio2 20 GPIO_ACTIVE_HIGH>;
enable-active-high;
};
...
...
&pcie0 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_pcie0>;
disable-gpio = <&gpio5 20 GPIO_ACTIVE_LOW>;
reset-gpio = <&gpio5 21 GPIO_ACTIVE_LOW>;
wake-gpio = <&gpio3 20 GPIO_ACTIVE_HIGH>;
clocks = <&clk IMX8MM_CLK_PCIE1_ROOT>,
<&clk IMX8MM_CLK_PCIE1_AUX>,
<&clk IMX8MM_CLK_PCIE1_PHY>,
<&pcie0_refclk>;
clock-names = "pcie", "pcie_aux", "pcie_phy", "pcie_bus";
assigned-clocks = <&clk IMX8MM_CLK_PCIE1_AUX>,
<&clk IMX8MM_CLK_PCIE1_PHY>,
<&clk IMX8MM_CLK_PCIE1_CTRL>;
assigned-clock-rates = <10000000>, <100000000>, <250000000>;
assigned-clock-parents = <&clk IMX8MM_SYS_PLL2_50M>,
<&clk IMX8MM_SYS_PLL2_100M>,
<&clk IMX8MM_SYS_PLL2_250M>;
ext_osc = <0>;
status = "okay";
};
...
...
&iomuxc {
...
...
pinctrl_pcie0: pcie0grp {
fsl,pins = <
MX8MM_IOMUXC_I2C4_SCL_GPIO5_IO20 0x19
MX8MM_IOMUXC_I2C4_SDA_GPIO5_IO21 0x19
MX8MM_IOMUXC_SD2_WP_GPIO2_IO20 0x19
MX8MM_IOMUXC_SAI5_RXC_GPIO3_IO20 0x19
>;
};
...
...
</pre>
===Accessing the peripheral ===
====Linux messages at boot time====
PCIe driver initialized:
<pre class="workstation-terminal">
...
...
[ 1.131579] ehci-pci: EHCI PCI platform driver
[ 1.147680] ohci-pci: OHCI PCI platform driver
[ 3.234024] imx6q-pcie 33800000.pcie: supply epdev_on not found, using dummy regulator
[ 3.242348] imx6q-pcie 33800000.pcie: PLL REF_CLK is used!.
[ 3.276463] imx6q-pcie 33800000.pcie: PCIe PLL is locked.
[ 3.284714] imx6q-pcie 33800000.pcie: iATU unroll: enabled
[ 3.295015] imx6q-pcie 33800000.pcie: Detected iATU regions: 4 outbound, 4 inbound
[ 3.309648] imx6q-pcie 33800000.pcie: host bridge /soc@0/pcie@33800000 ranges:
[ 3.316925] imx6q-pcie 33800000.pcie: IO 0x001ff80000..0x001ff8ffff -> 0x0000000000
[ 3.330476] imx6q-pcie 33800000.pcie: MEM 0x0018000000..0x001fefffff -> 0x0018000000
[ 3.342505] imx6q-pcie 33800000.pcie: iATU unroll: enabled
[ 3.351821] imx6q-pcie 33800000.pcie: Detected iATU regions: 4 outbound, 4 inbound
[ 3.444200] imx6q-pcie 33800000.pcie: Link up
...
...
</pre>
Check which are the devices connected to the PCIe.
<pre class="workstation-terminal">
root@desk-mx8mm:~# lspci
00:00.0 PCI bridge: Synopsys, Inc. DWC_usb3 / PCIe bridge (rev 01)
01:00.0 Network controller: Intel Corporation Wireless 7260 (rev bb)
root@desk-mx8mm:~#
</pre>
=== Additional information ===
[[Category:MITO 8M Mini]]
{| style="border-collapse:collapse; "
!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
|-
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Issue Date
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Notes
|-
| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |2024/04/08
| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |DESK-MX8M-L-4.1.0 release
|-
|}
<section end=History/>
<section begin=Body/>
==Peripheral WiFi==
=== Device tree configuration ===
Here below an example of device tree configuration used on standard DAVE's kit for the MITO 8M Mini:
From <code>imx8mm-mito8mmini.dts</code>:
<pre>
...
...
pcie0_refclk: pcie0-refclk {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <100000000>;
};
...
...
regulators {
...
reg_pcie_pwr: pcie_pwr {
compatible = "regulator-fixed";
regulator-name = "PCIe_PWREN";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
gpio = <&gpio2 20 GPIO_ACTIVE_HIGH>;
enable-active-high;
};
...
...
&pcie0 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_pcie0>;
disable-gpio = <&gpio5 20 GPIO_ACTIVE_LOW>;
reset-gpio = <&gpio5 21 GPIO_ACTIVE_LOW>;
wake-gpio = <&gpio3 20 GPIO_ACTIVE_HIGH>;
clocks = <&clk IMX8MM_CLK_PCIE1_ROOT>,
<&clk IMX8MM_CLK_PCIE1_AUX>,
<&clk IMX8MM_CLK_PCIE1_PHY>,
<&pcie0_refclk>;
clock-names = "pcie", "pcie_aux", "pcie_phy", "pcie_bus";
assigned-clocks = <&clk IMX8MM_CLK_PCIE1_AUX>,
<&clk IMX8MM_CLK_PCIE1_PHY>,
<&clk IMX8MM_CLK_PCIE1_CTRL>;
assigned-clock-rates = <10000000>, <100000000>, <250000000>;
assigned-clock-parents = <&clk IMX8MM_SYS_PLL2_50M>,
<&clk IMX8MM_SYS_PLL2_100M>,
<&clk IMX8MM_SYS_PLL2_250M>;
ext_osc = <0>;
status = "okay";
};
...
...
&iomuxc {
...
...
pinctrl_pcie0: pcie0grp {
fsl,pins = <
MX8MM_IOMUXC_I2C4_SCL_GPIO5_IO20 0x19
MX8MM_IOMUXC_I2C4_SDA_GPIO5_IO21 0x19
MX8MM_IOMUXC_SD2_WP_GPIO2_IO20 0x19
MX8MM_IOMUXC_SAI5_RXC_GPIO3_IO20 0x19
>;
};
...
...
</pre>
===Accessing the peripheral ===
====Linux messages at boot time====
PCIe driver initialized:
<pre class="workstation-terminal">
...
...
[ 1.131579] ehci-pci: EHCI PCI platform driver
[ 1.147680] ohci-pci: OHCI PCI platform driver
[ 3.234024] imx6q-pcie 33800000.pcie: supply epdev_on not found, using dummy regulator
[ 3.242348] imx6q-pcie 33800000.pcie: PLL REF_CLK is used!.
[ 3.276463] imx6q-pcie 33800000.pcie: PCIe PLL is locked.
[ 3.284714] imx6q-pcie 33800000.pcie: iATU unroll: enabled
[ 3.295015] imx6q-pcie 33800000.pcie: Detected iATU regions: 4 outbound, 4 inbound
[ 3.309648] imx6q-pcie 33800000.pcie: host bridge /soc@0/pcie@33800000 ranges:
[ 3.316925] imx6q-pcie 33800000.pcie: IO 0x001ff80000..0x001ff8ffff -> 0x0000000000
[ 3.330476] imx6q-pcie 33800000.pcie: MEM 0x0018000000..0x001fefffff -> 0x0018000000
[ 3.342505] imx6q-pcie 33800000.pcie: iATU unroll: enabled
[ 3.351821] imx6q-pcie 33800000.pcie: Detected iATU regions: 4 outbound, 4 inbound
[ 3.444200] imx6q-pcie 33800000.pcie: Link up
...
...
</pre>
Check which are the devices connected to the PCIe.
<pre class="workstation-terminal">
root@desk-mx8mm:~# lspci
00:00.0 PCI bridge: Synopsys, Inc. DWC_usb3 / PCIe bridge (rev 01)
01:00.0 Network controller: Intel Corporation Wireless 7260 (rev bb)
root@desk-mx8mm:~#
</pre>
=== Additional information ===
[[Category:MITO 8M Mini]]
