diff options
| author | Rajan Vaja <rajan.vaja@xilinx.com> | 2019-03-04 15:18:08 -0800 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2019-03-18 13:45:27 +0100 |
| commit | 3d0313786470acb414b7d5fdd2202f061acffb02 (patch) | |
| tree | 7e34a492da0da9cab34389dfa8125d2e741085ae /drivers/firmware | |
| parent | b9472f7d8224460499dd7128ec944735ed5345a0 (diff) | |
| download | linux-3d0313786470acb414b7d5fdd2202f061acffb02.tar.gz linux-3d0313786470acb414b7d5fdd2202f061acffb02.tar.bz2 linux-3d0313786470acb414b7d5fdd2202f061acffb02.zip | |
drivers: Defer probe if firmware is not ready
Driver needs ZynqMP firmware interface to call EEMI
APIs. In case firmware is not ready, dependent drivers
should wait until the firmware is ready.
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Jolly Shah <jollys@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/xilinx/zynqmp-debug.c | 3 | ||||
| -rw-r--r-- | drivers/firmware/xilinx/zynqmp.c | 11 |
2 files changed, 10 insertions, 4 deletions
diff --git a/drivers/firmware/xilinx/zynqmp-debug.c b/drivers/firmware/xilinx/zynqmp-debug.c index 90b66cdbfd58..c6d0724da4db 100644 --- a/drivers/firmware/xilinx/zynqmp-debug.c +++ b/drivers/firmware/xilinx/zynqmp-debug.c @@ -90,9 +90,6 @@ static int process_api_request(u32 pm_id, u64 *pm_api_arg, u32 *pm_api_ret) int ret; struct zynqmp_pm_query_data qdata = {0}; - if (!eemi_ops) - return -ENXIO; - switch (pm_id) { case PM_GET_API_VERSION: ret = eemi_ops->get_api_version(&pm_api_version); diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c index 98f936125643..87a1d636c0dc 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -24,6 +24,8 @@ #include <linux/firmware/xlnx-zynqmp.h> #include "zynqmp-debug.h" +static const struct zynqmp_eemi_ops *eemi_ops_tbl; + static const struct mfd_cell firmware_devs[] = { { .name = "zynqmp_power_controller", @@ -649,7 +651,11 @@ static const struct zynqmp_eemi_ops eemi_ops = { */ const struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void) { - return &eemi_ops; + if (eemi_ops_tbl) + return eemi_ops_tbl; + else + return ERR_PTR(-EPROBE_DEFER); + } EXPORT_SYMBOL_GPL(zynqmp_pm_get_eemi_ops); @@ -694,6 +700,9 @@ static int zynqmp_firmware_probe(struct platform_device *pdev) pr_info("%s Trustzone version v%d.%d\n", __func__, pm_tz_version >> 16, pm_tz_version & 0xFFFF); + /* Assign eemi_ops_table */ + eemi_ops_tbl = &eemi_ops; + zynqmp_pm_api_debugfs_init(); ret = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, firmware_devs, |