change otg to host mode

hc

2024-05-11 04dd17822334871b23ea2862f7798fb0e0007777

 kernel/arch/x86/include/asm/iosf_mbi.h
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@@ -39,6 +39,7 @@
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 #define BT_MBI_UNIT_PMC		0x04
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 #define BT_MBI_UNIT_GFX		0x06
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 #define BT_MBI_UNIT_SMI		0x0C
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+#define BT_MBI_UNIT_CCK		0x14
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 #define BT_MBI_UNIT_USB		0x43
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 #define BT_MBI_UNIT_SATA	0xA3
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 #define BT_MBI_UNIT_PCIE	0xA6
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@@ -105,8 +106,10 @@
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  * the PMIC bus while another driver is also accessing the PMIC bus various bad
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  * things happen.
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  *
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- * To avoid these problems this function must be called before accessing the
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- * P-Unit or the PMIC, be it through iosf_mbi* functions or through other means.
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+ * Call this function before sending requests to the P-Unit which may make it
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+ * access the PMIC, be it through iosf_mbi* functions or through other means.
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+ * This function will block all kernel access to the PMIC I2C bus, so that the
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+ * P-Unit can safely access the PMIC over the shared I2C bus.
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  *
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  * Note on these systems the i2c-bus driver will request a sempahore from the
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  * P-Unit for exclusive access to the PMIC bus when i2c drivers are accessing
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@@ -121,6 +124,31 @@
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  * iosf_mbi_punit_release() - Release access to the P-Unit
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  */
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 void iosf_mbi_punit_release(void);
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+
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+/**
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+ * iosf_mbi_block_punit_i2c_access() - Block P-Unit accesses to the PMIC bus
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+ *
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+ * Call this function to block P-Unit access to the PMIC I2C bus, so that the
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+ * kernel can safely access the PMIC over the shared I2C bus.
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+ *
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+ * This function acquires the P-Unit bus semaphore and notifies
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+ * pmic_bus_access_notifier listeners that they may no longer access the
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+ * P-Unit in a way which may cause it to access the shared I2C bus.
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+ *
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+ * Note this function may be called multiple times and the bus will not
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+ * be released until iosf_mbi_unblock_punit_i2c_access() has been called the
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+ * same amount of times.
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+ *
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+ * Return: Nonzero on error
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+ */
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+int iosf_mbi_block_punit_i2c_access(void);
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+
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+/*
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+ * iosf_mbi_unblock_punit_i2c_access() - Release PMIC I2C bus block
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+ *
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+ * Release i2c access block gotten through iosf_mbi_block_punit_i2c_access().
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+ */
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+void iosf_mbi_unblock_punit_i2c_access(void);
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 /**
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  * iosf_mbi_register_pmic_bus_access_notifier - Register PMIC bus notifier
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@@ -157,14 +185,6 @@
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  */
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 int iosf_mbi_unregister_pmic_bus_access_notifier_unlocked(
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 	struct notifier_block *nb);
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-
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-/**
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- * iosf_mbi_call_pmic_bus_access_notifier_chain - Call PMIC bus notifier chain
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- *
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- * @val: action to pass into listener's notifier_call function
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- * @v: data pointer to pass into listener's notifier_call function
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- */
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-int iosf_mbi_call_pmic_bus_access_notifier_chain(unsigned long val, void *v);
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 /**
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  * iosf_mbi_assert_punit_acquired - Assert that the P-Unit has been acquired.