2 Commits

Author	SHA1	Message	Date
Sun Ke	ad0112f2d5	drivers/perf: fix return value check in ali_drw_pmu_probe() ... In case of error, devm_ioremap_resource() returns ERR_PTR(), and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Fixes: cf7b61073e45 ("drivers/perf: add DDR Sub-System Driveway PMU driver for Yitian 710 SoC") Signed-off-by: Sun Ke <sunke32@huawei.com> Acked-by: Will Deacon <will@kernel.org> Reviewed-by: Shuai Xue <xueshuai@linux.alibaba.com> Link: https://lore.kernel.org/r/20220924032127.313156-1-sunke32@huawei.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>	2022-10-07 14:47:38 +01:00
Shuai Xue	cf7b61073e	drivers/perf: add DDR Sub-System Driveway PMU driver for Yitian 710 SoC ... Add the DDR Sub-System Driveway Performance Monitoring Unit (PMU) driver support for Alibaba T-Head Yitian 710 SoC chip. Yitian supports DDR5/4 DRAM and targets cloud computing and HPC. Each PMU is registered as a device in /sys/bus/event_source/devices, and users can select event to monitor in each sub-channel, independently. For example, ali_drw_21000 and ali_drw_21080 are two PMU devices for two sub-channels of the same channel in die 0. And the PMU device of die 1 is prefixed with ali_drw_400XXXXX, e.g. ali_drw_40021000. Due to hardware limitation, one of DDRSS Driveway PMU overflow interrupt shares the same irq number with MPAM ERR_IRQ. To register DDRSS PMU and MPAM drivers successfully, add IRQF_SHARED flag. Signed-off-by: Shuai Xue <xueshuai@linux.alibaba.com> Co-developed-by: Hongbo Yao <yaohongbo@linux.alibaba.com> Signed-off-by: Hongbo Yao <yaohongbo@linux.alibaba.com> Co-developed-by: Neng Chen <nengchen@linux.alibaba.com> Signed-off-by: Neng Chen <nengchen@linux.alibaba.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Link: https://lore.kernel.org/r/20220818031822.38415-3-xueshuai@linux.alibaba.com Signed-off-by: Will Deacon <will@kernel.org>	2022-09-22 14:09:10 +01:00