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forked fromtorvalds/linux

Commitbda7b07

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andy-shevIngo Molnar
authored and
Ingo Molnar
committed
x86/platform/intel-mid: Implement power off sequence
Tell SCU that we are about powering off the device.Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>Cc: Linus Torvalds <torvalds@linux-foundation.org>Cc: Peter Zijlstra <peterz@infradead.org>Cc: Thomas Gleixner <tglx@linutronix.de>Link:http://lkml.kernel.org/r/20160907123955.21228-1-andriy.shevchenko@linux.intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
1 parent3976b03 commitbda7b07

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4 files changed

+32
-1
lines changed

4 files changed

+32
-1
lines changed

‎arch/x86/include/asm/intel-mid.h‎

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Original file line numberDiff line numberDiff line change
@@ -18,6 +18,8 @@
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externintintel_mid_pci_init(void);
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externintintel_mid_pci_set_power_state(structpci_dev*pdev,pci_power_tstate);
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21+
externvoidintel_mid_pwr_power_off(void);
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#defineINTEL_MID_PWR_LSS_OFFSET4
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#defineINTEL_MID_PWR_LSS_TYPE(1 << 7)
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‎arch/x86/include/asm/intel_scu_ipc.h‎

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Original file line numberDiff line numberDiff line change
@@ -3,6 +3,8 @@
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#include<linux/notifier.h>
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6+
#defineIPCMSG_COLD_OFF0x80/* Only for Tangier */
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#defineIPCMSG_WARM_RESET0xF0
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#defineIPCMSG_COLD_RESET0xF1
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#defineIPCMSG_SOFT_RESET0xF2

‎arch/x86/platform/intel-mid/intel-mid.c‎

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Original file line numberDiff line numberDiff line change
@@ -70,6 +70,11 @@ EXPORT_SYMBOL_GPL(__intel_mid_cpu_chip);
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staticvoidintel_mid_power_off(void)
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{
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/* Shut down South Complex via PWRMU */
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intel_mid_pwr_power_off();
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/* Only for Tangier, the rest will ignore this command */
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intel_scu_ipc_simple_command(IPCMSG_COLD_OFF,1);
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};
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staticvoidintel_mid_reboot(void)

‎arch/x86/platform/intel-mid/pwr.c‎

Lines changed: 23 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -48,7 +48,15 @@
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#definePM_CMD_CM_IMMEDIATE(1 << 9)
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#definePM_CMD_CM_DELAY(2 << 9)
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#definePM_CMD_CM_TRIGGER(3 << 9)
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#definePM_CMD_D3cold(1 << 21)
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/* System states */
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#definePM_CMD_SYS_STATE_S5(5 << 16)
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/* Trigger variants */
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#definePM_CMD_CFG_TRIGGER_NC(3 << 19)
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/* Message to wait for TRIGGER_NC case */
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#defineTRIGGER_NC_MSG_2(2 << 22)
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/* List of commands */
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#defineCMD_SET_CFG0x01
@@ -264,6 +272,20 @@ int intel_mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state)
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}
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EXPORT_SYMBOL_GPL(intel_mid_pci_set_power_state);
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voidintel_mid_pwr_power_off(void)
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{
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structmid_pwr*pwr=midpwr;
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u32cmd=PM_CMD_SYS_STATE_S5 |
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PM_CMD_CMD(CMD_SET_CFG) |
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PM_CMD_CM_TRIGGER |
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PM_CMD_CFG_TRIGGER_NC |
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TRIGGER_NC_MSG_2;
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/* Send command to SCU */
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writel(cmd,pwr->regs+PM_CMD);
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mid_pwr_wait(pwr);
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}
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intintel_mid_pwr_get_lss_id(structpci_dev*pdev)
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{
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intvndr;

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