diff options
| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2021-02-01 21:13:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-04 19:00:33 +0300 |
| commit | f5bd523690d2ff7bc4bd3f535888eaf9349be176 (patch) | |
| tree | b3fb0ad55c8609588753d67c9f7a168a516f6951 /drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | |
| parent | 5e2acf9d5d2dffd668dab8899d9fc904f1051e07 (diff) | |
| download | linux-f5bd523690d2ff7bc4bd3f535888eaf9349be176.tar.xz | |
coresight: etm4x: Convert all register accesses
Convert all register accesses from etm4x driver to use a wrapper
to allow switching the access at runtime with little overhead.
co-developed by sed tool ;-), mostly equivalent to :
s/readl\(_relaxed\)\?(drvdata->base + \(.*\))/etm4x_\1_read32(csdev, \2)
s/writel\(_relaxed\)\?(\(.*\), drvdata->base + \(.*\))/etm4x_\1_write32(csdev, \2, \3)
We don't want to replace them with the csdev_access_* to
avoid a function call for every register access for system
register access. This is a prepartory step to add system
register access later where the support is available.
Link: https://lore.kernel.org/r/20210110224850.1880240-9-suzuki.poulose@arm.com
Cc: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210201181351.1475223-11-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing/coresight/coresight-etm4x-sysfs.c')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c index c4781d4e5886..fce9df16bfb5 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c @@ -2319,7 +2319,8 @@ static struct attribute *coresight_etmv4_attrs[] = { }; struct etmv4_reg { - void __iomem *addr; + struct coresight_device *csdev; + u32 offset; u32 data; }; @@ -2327,7 +2328,7 @@ static void do_smp_cross_read(void *data) { struct etmv4_reg *reg = data; - reg->data = readl_relaxed(reg->addr); + reg->data = etm4x_relaxed_read32(®->csdev->access, reg->offset); } static u32 etmv4_cross_read(const struct device *dev, u32 offset) @@ -2335,7 +2336,9 @@ static u32 etmv4_cross_read(const struct device *dev, u32 offset) struct etmv4_drvdata *drvdata = dev_get_drvdata(dev); struct etmv4_reg reg; - reg.addr = drvdata->base + offset; + reg.offset = offset; + reg.csdev = drvdata->csdev; + /* * smp cross call ensures the CPU will be powered up before * accessing the ETMv4 trace core registers |