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Age	Commit message (Collapse)	Author
2016-09-09	hwmon: (xgene) access mailbox as RAM	Arnd Bergmann
	The newly added hwmon driver fails to build in an allmodconfig kernel: ERROR: "memblock_is_memory" [drivers/hwmon/xgene-hwmon.ko] undefined! According to comments in the code, the mailbox is a shared memory region, not a set of MMIO registers, so we should use memremap() for mapping it instead of ioremap or acpi_os_ioremap, and pointer dereferences instead of readl/writel. The driver already uses plain kernel pointers, so it's a bit unusual to work with functions that operate on __iomem pointers, and this fixes that part too. I'm using READ_ONCE/WRITE_ONCE here to keep the existing behavior regarding the ordering of the accesses from the CPU, but note that there are no barriers (also unchanged from before). I'm also keeping the endianness behavior, though I'm unsure whether the message data was supposed to be in LE32 format in the first place, it's possible this was meant to be interpreted as a byte stream instead. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Hoan Tran <hotran@apm.com> Tested-by: Hoan Tran <hotran@apm.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2016-09-08	hwmon: (xgene) Fix crash when alarm occurs before driver probe	hotran
	The system crashes during probing xgene-hwmon driver when temperature alarm interrupt occurs before. It's because - xgene_hwmon_probe() requests mailbox channel which also enables the mailbox interrupt. - As temperature alarm interrupt is pending, ISR runs and crashes when accesses into invalid resourse as unmapped PCC shared memory. This patch fixes this issue by saving this alarm message and scheduling a bottom handler after xgene_hwmon_probe() finish. Signed-off-by: Hoan Tran <hotran@apm.com> Reported-by: Itaru Kitayama <itaru.kitayama@riken.jp> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2016-09-08	hwmon: Add xgene hwmon driver	hotran
	This patch adds hardware temperature and power reading support for APM X-Gene SoC using the mailbox communication interface. Signed-off-by: Hoan Tran <hotran@apm.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net>