Messages in this thread Patch in this message | | | From | Guenter Roeck <> | Subject | [PATCH v3 45/47] x86: pmc_atom: Register power-off handler with kernel power-off handler | Date | Mon, 27 Oct 2014 08:55:52 -0700 |
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Register with kernel power-off handler instead of setting pm_power_off directly. Register with low priority to reflect that the original code only sets pm_power_off if it was not already set.
Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> --- v3: - Replace poweroff in all newly introduced variables and in text with power_off or power-off as appropriate - Replace POWEROFF_PRIORITY_xxx with POWER_OFF_PRIORITY_xxx v2: - Use define to specify poweroff handler priority - Use dev_warn instead of dev_err
arch/x86/kernel/pmc_atom.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/pmc_atom.c b/arch/x86/kernel/pmc_atom.c index 0ee5025e..973cd5b 100644 --- a/arch/x86/kernel/pmc_atom.c +++ b/arch/x86/kernel/pmc_atom.c @@ -20,6 +20,8 @@ #include <linux/pci.h> #include <linux/device.h> #include <linux/debugfs.h> +#include <linux/notifier.h> +#include <linux/pm.h> #include <linux/seq_file.h> #include <linux/io.h> @@ -92,7 +94,8 @@ static inline void pmc_reg_write(struct pmc_dev *pmc, int reg_offset, u32 val) writel(val, pmc->regmap + reg_offset); } -static void pmc_power_off(void) +static int pmc_power_off(struct notifier_block *this, unsigned long unused1, + void *unused2) { u16 pm1_cnt_port; u32 pm1_cnt_value; @@ -107,8 +110,15 @@ static void pmc_power_off(void) pm1_cnt_value |= SLEEP_ENABLE; outl(pm1_cnt_value, pm1_cnt_port); + + return NOTIFY_DONE; } +static struct notifier_block pmc_power_off_nb = { + .notifier_call = pmc_power_off, + .priority = POWER_OFF_PRIORITY_LOW, +}; + static void pmc_hw_reg_setup(struct pmc_dev *pmc) { /* @@ -252,8 +262,12 @@ static int pmc_setup_dev(struct pci_dev *pdev) acpi_base_addr &= ACPI_BASE_ADDR_MASK; /* Install power off function */ - if (acpi_base_addr != 0 && pm_power_off == NULL) - pm_power_off = pmc_power_off; + if (acpi_base_addr != 0) { + ret = register_power_off_handler(&pmc_power_off_nb); + if (ret) + dev_warn(&pdev->dev, + "Failed to install power-off handler\n"); + } pci_read_config_dword(pdev, PMC_BASE_ADDR_OFFSET, &pmc->base_addr); pmc->base_addr &= PMC_BASE_ADDR_MASK; -- 1.9.1
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