diff options
| author | Mark Brown <broonie@kernel.org> | 2022-11-25 21:26:21 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-11-25 21:26:21 +0000 |
| commit | 79dfd9d5e8b5cab454ab8fafdfaed0c82b2e2f4b (patch) | |
| tree | 5f74933ed61c9319437932db31a50c116dee043d /drivers/platform/x86/intel/pmt/class.c | |
| parent | d067b3378a78c9c3048ac535e31c171b6f5b5846 (diff) | |
| parent | cd887a7ba74c8378ae8b52afa04adb0d49cdf13d (diff) | |
ASoC: adau1372: fixes after debugging custom board
Merge series from Maarten Zanders <maarten.zanders@mind.be>:
A collection of fixes and improvements for the adau1372 driver.
Diffstat (limited to 'drivers/platform/x86/intel/pmt/class.c')
| -rw-r--r-- | drivers/platform/x86/intel/pmt/class.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/platform/x86/intel/pmt/class.c b/drivers/platform/x86/intel/pmt/class.c index 53d7fd2943b4..46598dcb634a 100644 --- a/drivers/platform/x86/intel/pmt/class.c +++ b/drivers/platform/x86/intel/pmt/class.c @@ -9,6 +9,7 @@ */ #include <linux/kernel.h> +#include <linux/io-64-nonatomic-lo-hi.h> #include <linux/module.h> #include <linux/mm.h> #include <linux/pci.h> @@ -19,6 +20,7 @@ #define PMT_XA_START 0 #define PMT_XA_MAX INT_MAX #define PMT_XA_LIMIT XA_LIMIT(PMT_XA_START, PMT_XA_MAX) +#define GUID_SPR_PUNIT 0x9956f43f bool intel_pmt_is_early_client_hw(struct device *dev) { @@ -33,6 +35,29 @@ bool intel_pmt_is_early_client_hw(struct device *dev) } EXPORT_SYMBOL_GPL(intel_pmt_is_early_client_hw); +static inline int +pmt_memcpy64_fromio(void *to, const u64 __iomem *from, size_t count) +{ + int i, remain; + u64 *buf = to; + + if (!IS_ALIGNED((unsigned long)from, 8)) + return -EFAULT; + + for (i = 0; i < count/8; i++) + buf[i] = readq(&from[i]); + + /* Copy any remaining bytes */ + remain = count % 8; + if (remain) { + u64 tmp = readq(&from[i]); + + memcpy(&buf[i], &tmp, remain); + } + + return count; +} + /* * sysfs */ @@ -54,7 +79,11 @@ intel_pmt_read(struct file *filp, struct kobject *kobj, if (count > entry->size - off) count = entry->size - off; - memcpy_fromio(buf, entry->base + off, count); + if (entry->guid == GUID_SPR_PUNIT) + /* PUNIT on SPR only supports aligned 64-bit read */ + count = pmt_memcpy64_fromio(buf, entry->base + off, count); + else + memcpy_fromio(buf, entry->base + off, count); return count; } |