diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-imx/imx8/cpu.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/imx8/cpu.c b/arch/arm/mach-imx/imx8/cpu.c index 64f4d900c1c..50aa4638768 100644 --- a/arch/arm/mach-imx/imx8/cpu.c +++ b/arch/arm/mach-imx/imx8/cpu.c @@ -1818,6 +1818,32 @@ void disconnect_from_pc(void) } } +bool check_owned_udevice(struct udevice *dev) +{ + int ret; + sc_rsrc_t resource_id; + struct ofnode_phandle_args args; + + /* Get the resource id from its power-domain */ + ret = dev_read_phandle_with_args(dev, "power-domains", + "#power-domain-cells", 0, 0, &args); + if (ret) { + printf("no power-domains found\n"); + return false; + } + + /* Get the owner partition for resource*/ + resource_id = (sc_rsrc_t)ofnode_read_u32_default(args.node, "reg", SC_R_LAST); + if (resource_id == SC_R_LAST) { + printf("Can't find the resource id for udev %s\n", dev->name); + return false; + } + + debug("udev %s, resource id %d\n", dev->name, resource_id); + + return check_owned_resource(resource_id); +} + #ifdef CONFIG_IMX_VSERVICE struct udevice * board_imx_vservice_find_mu(struct udevice *dev) { @@ -1911,3 +1937,23 @@ void * board_imx_vservice_get_buffer(struct imx_vservice_channel *node, u32 size return NULL; } #endif + +/* imx8qxp i2c1 has lots of devices may used by both M4 and A core +* If A core partition does not own the resource, we will start +* virtual i2c driver. Otherwise use local i2c driver. +*/ +int board_imx_virt_i2c_bind(struct udevice *dev) +{ + if (check_owned_udevice(dev)) + return -ENODEV; + + return 0; +} + +int board_imx_lpi2c_bind(struct udevice *dev) +{ + if (check_owned_udevice(dev)) + return 0; + + return -ENODEV; +} |