Part Number: DRA752
Tool/software: Linux
Should the DRA752 kernel use the Linux emif device driver?
I notice that my settings are not building the EMIF device driver although the "TDA2x SoC for ADAS Silicon Revision 1.1 (Rev. Z)" mentions the EMIF controller. I tried turning on
CONFIG_TI_EMIF=m
and adding the appropriate snippet to the device-tree:
&ocp {
emif1: emif@4c000000 {
compatible = "ti,emif-4d5";
ti,hwmods = "emif1";
ti,no-idle-on-init;
phy-type = <2>; /* DDR PHY type: Intelli PHY */
reg = <0x4c000000 0x400>;
interrupts = <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>;
hw-caps-read-idle-ctrl;
hw-caps-ll-interface;
hw-caps-temp-alert;
};
emif2: emif@4d000000 {
compatible = "ti,emif-4d5";
ti,hwmods = "emif2";
ti,no-idle-on-init;
phy-type = <2>; /* DDR PHY type: Intelli PHY */
reg = <0x4d000000 0x400>;
interrupts = <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>;
hw-caps-read-idle-ctrl;
hw-caps-ll-interface;
hw-caps-temp-alert;
};
};
When the driver tries to load at boot, I see errors about missing hwmods:
~$ dmesg | grep -i emif
[ 0.388626] platform 4c000000.emif: Cannot lookup hwmod 'emif1'
[ 0.388987] platform 4d000000.emif: Cannot lookup hwmod 'emif2'
[ 5.279418] emif_probe: error getting device data
These hwmods should be available, as they are provided in the statically compiled omap_hwmod_54xx_data.c.
Is the idea of trying to use this driver wrong? If not, please present any suggestions about how to correctly configure it.
Thanks,
Alison Chaiken
alison@peloton-tech.com
