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/soc/xilinx/zynqmp_power.c | |
| parent | b9472f7d8224460499dd7128ec944735ed5345a0 (diff) | |
| download | linux-3d0313786470acb414b7d5fdd2202f061acffb02.tar.bz2 | |
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/soc/xilinx/zynqmp_power.c')
| -rw-r--r-- | drivers/soc/xilinx/zynqmp_power.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/soc/xilinx/zynqmp_power.c b/drivers/soc/xilinx/zynqmp_power.c index 771cb59b9d22..1b9d14411a15 100644 --- a/drivers/soc/xilinx/zynqmp_power.c +++ b/drivers/soc/xilinx/zynqmp_power.c @@ -31,6 +31,7 @@ static const char *const suspend_modes[] = { }; static enum pm_suspend_mode suspend_mode = PM_SUSPEND_MODE_STD; +static const struct zynqmp_eemi_ops *eemi_ops; enum pm_api_cb_id { PM_INIT_SUSPEND_CB = 30, @@ -92,9 +93,8 @@ static ssize_t suspend_mode_store(struct device *dev, const char *buf, size_t count) { int md, ret = -EINVAL; - const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops(); - if (!eemi_ops || !eemi_ops->set_suspend_mode) + if (!eemi_ops->set_suspend_mode) return ret; for (md = PM_SUSPEND_MODE_FIRST; md < ARRAY_SIZE(suspend_modes); md++) @@ -120,9 +120,11 @@ static int zynqmp_pm_probe(struct platform_device *pdev) int ret, irq; u32 pm_api_version; - const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops(); + eemi_ops = zynqmp_pm_get_eemi_ops(); + if (IS_ERR(eemi_ops)) + return PTR_ERR(eemi_ops); - if (!eemi_ops || !eemi_ops->get_api_version || !eemi_ops->init_finalize) + if (!eemi_ops->get_api_version || !eemi_ops->init_finalize) return -ENXIO; eemi_ops->init_finalize(); |