[PATCH v5 46/48] x86: pmc_atom: Register power-off handler with kernel power-off handler

[Guenter Roeck]

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 <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: H. Peter Anvin <h...@zytor.com>
Acked-by: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: Guenter Roeck <li...@roeck-us.net>
---
v5:
- Rebase to v3.18-rc3
v4:
- No change
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 | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/pmc_atom.c b/arch/x86/kernel/pmc_atom.c
index 0ee5025e..acb4e78 100644
--- a/arch/x86/kernel/pmc_atom.c
+++ b/arch/x86/kernel/pmc_atom.c
@@ -20,6 +20,7 @@
 #include <linux/pci.h>
 #include <linux/device.h>
 #include <linux/debugfs.h>
+#include <linux/pm.h>
 #include <linux/seq_file.h>
 #include <linux/io.h>
 
@@ -92,7 +93,7 @@ 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 void pmc_power_off(struct power_off_handler_block *this)
 {
        u16     pm1_cnt_port;
        u32     pm1_cnt_value;
@@ -109,6 +110,11 @@ static void pmc_power_off(void)
        outl(pm1_cnt_value, pm1_cnt_port);
 }
 
+static struct power_off_handler_block pmc_power_off_hb = {
+       .handler = pmc_power_off,
+       .priority = POWER_OFF_PRIORITY_LOW,
+};
+
 static void pmc_hw_reg_setup(struct pmc_dev *pmc)
 {
        /*
@@ -252,8 +258,12 @@ 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_hb);
+               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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