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Keystone SOC driver update for 4.19

Browse Source 
-  Add suspend/resume functionality to TI EMIF SRAM driver
  -  Add wakeup M3 RTC self refresh support
  -  Fix for the PM runtime ifdefs
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Merge tag 'soc_drivers_for_4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into next/drivers

Keystone SOC driver update for 4.19

 -  Add suspend/resume functionality to TI EMIF SRAM driver
 -  Add wakeup M3 RTC self refresh support
 -  Fix for the PM runtime ifdefs

* tag 'soc_drivers_for_4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone:
  soc: ti: wkup_m3_ipc: mark PM functions as __maybe_unused
  soc: ti: wkup_m3_ipc: Add wkup_m3_request_wake_src
  soc: ti: wkup_m3_ipc: Add rtc_only with ddr in self refresh mode support
  memory: ti-emif-sram: Add resume function to recopy sram code

Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson 2018-07-08 09:12:51 -07:00
commit 872d6d96cd
3 changed files with 118 additions and 0 deletions
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33
drivers/memory/ti-emif-pm.c
View File

@ -249,6 +249,34 @@ static const struct of_device_id ti_emif_of_match[] = {
};
MODULE_DEVICE_TABLE(of, ti_emif_of_match);
#ifdef CONFIG_PM_SLEEP
static int ti_emif_resume(struct device *dev)
{
unsigned long tmp =
__raw_readl((void *)emif_instance->ti_emif_sram_virt);
/*
* Check to see if what we are copying is already present in the
* first byte at the destination, only copy if it is not which
* indicates we have lost context and sram no longer contains
* the PM code
*/
if (tmp != ti_emif_sram)
ti_emif_push_sram(dev, emif_instance);
return 0;
}
static int ti_emif_suspend(struct device *dev)
{
/*
* The contents will be present in DDR hence no need to
* explicitly save
*/
return 0;
}
#endif /* CONFIG_PM_SLEEP */
static int ti_emif_probe(struct platform_device *pdev)
{
int ret;
@ -308,12 +336,17 @@ static int ti_emif_remove(struct platform_device *pdev)
return 0;
}
static const struct dev_pm_ops ti_emif_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(ti_emif_suspend, ti_emif_resume)
};
static struct platform_driver ti_emif_driver = {
.probe = ti_emif_probe,
.remove = ti_emif_remove,
.driver = {
.name = KBUILD_MODNAME,
.of_match_table = of_match_ptr(ti_emif_of_match),
.pm = &ti_emif_pm_ops,
},
};
module_platform_driver(ti_emif_driver);

76
drivers/soc/ti/wkup_m3_ipc.c
View File

@ -46,6 +46,7 @@
#define M3_BASELINE_VERSION 0x191
#define M3_STATUS_RESP_MASK (0xffff << 16)
#define M3_FW_VERSION_MASK 0xffff
#define M3_WAKE_SRC_MASK 0xff
#define M3_STATE_UNKNOWN 0
#define M3_STATE_RESET 1
@ -55,6 +56,23 @@
static struct wkup_m3_ipc *m3_ipc_state;
static const struct wkup_m3_wakeup_src wakeups[] = {
{.irq_nr = 35, .src = "USB0_PHY"},
{.irq_nr = 36, .src = "USB1_PHY"},
{.irq_nr = 40, .src = "I2C0"},
{.irq_nr = 41, .src = "RTC Timer"},
{.irq_nr = 42, .src = "RTC Alarm"},
{.irq_nr = 43, .src = "Timer0"},
{.irq_nr = 44, .src = "Timer1"},
{.irq_nr = 45, .src = "UART"},
{.irq_nr = 46, .src = "GPIO0"},
{.irq_nr = 48, .src = "MPU_WAKE"},
{.irq_nr = 49, .src = "WDT0"},
{.irq_nr = 50, .src = "WDT1"},
{.irq_nr = 51, .src = "ADC_TSC"},
{.irq_nr = 0, .src = "Unknown"},
};
static void am33xx_txev_eoi(struct wkup_m3_ipc *m3_ipc)
{
writel(AM33XX_M3_TXEV_ACK,
@ -329,12 +347,45 @@ static int wkup_m3_finish_low_power(struct wkup_m3_ipc *m3_ipc)
return 0;
}
/**
* wkup_m3_request_wake_src - Get the wakeup source info passed from wkup_m3
* @m3_ipc: Pointer to wkup_m3_ipc context
*/
static const char *wkup_m3_request_wake_src(struct wkup_m3_ipc *m3_ipc)
{
unsigned int wakeup_src_idx;
int j, val;
val = wkup_m3_ctrl_ipc_read(m3_ipc, 6);
wakeup_src_idx = val & M3_WAKE_SRC_MASK;
for (j = 0; j < ARRAY_SIZE(wakeups) - 1; j++) {
if (wakeups[j].irq_nr == wakeup_src_idx)
return wakeups[j].src;
}
return wakeups[j].src;
}
/**
* wkup_m3_set_rtc_only - Set the rtc_only flag
* @wkup_m3_wakeup: struct wkup_m3_wakeup_src * gets assigned the
* wakeup src value
*/
static void wkup_m3_set_rtc_only(struct wkup_m3_ipc *m3_ipc)
{
if (m3_ipc_state)
m3_ipc_state->is_rtc_only = true;
}
static struct wkup_m3_ipc_ops ipc_ops = {
.set_mem_type = wkup_m3_set_mem_type,
.set_resume_address = wkup_m3_set_resume_address,
.prepare_low_power = wkup_m3_prepare_low_power,
.finish_low_power = wkup_m3_finish_low_power,
.request_pm_status = wkup_m3_request_pm_status,
.request_wake_src = wkup_m3_request_wake_src,
.set_rtc_only = wkup_m3_set_rtc_only,
};
/**
@ -484,6 +535,30 @@ static int wkup_m3_ipc_remove(struct platform_device *pdev)
return 0;
}
static int __maybe_unused wkup_m3_ipc_suspend(struct device *dev)
{
/*
* Nothing needs to be done on suspend even with rtc_only flag set
*/
return 0;
}
static int __maybe_unused wkup_m3_ipc_resume(struct device *dev)
{
if (m3_ipc_state->is_rtc_only) {
rproc_shutdown(m3_ipc_state->rproc);
rproc_boot(m3_ipc_state->rproc);
}
m3_ipc_state->is_rtc_only = false;
return 0;
}
static const struct dev_pm_ops wkup_m3_ipc_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(wkup_m3_ipc_suspend, wkup_m3_ipc_resume)
};
static const struct of_device_id wkup_m3_ipc_of_match[] = {
{ .compatible = "ti,am3352-wkup-m3-ipc", },
{ .compatible = "ti,am4372-wkup-m3-ipc", },
@ -497,6 +572,7 @@ static struct platform_driver wkup_m3_ipc_driver = {
.driver = {
.name = "wkup_m3_ipc",
.of_match_table = wkup_m3_ipc_of_match,
.pm = &wkup_m3_ipc_pm_ops,
},
};

9
include/linux/wkup_m3_ipc.h
View File

@ -40,6 +40,12 @@ struct wkup_m3_ipc {
struct mbox_chan *mbox;
struct wkup_m3_ipc_ops *ops;
int is_rtc_only;
};
struct wkup_m3_wakeup_src {
int irq_nr;
char src[10];
};
struct wkup_m3_ipc_ops {
@ -48,8 +54,11 @@ struct wkup_m3_ipc_ops {
int (*prepare_low_power)(struct wkup_m3_ipc *m3_ipc, int state);
int (*finish_low_power)(struct wkup_m3_ipc *m3_ipc);
int (*request_pm_status)(struct wkup_m3_ipc *m3_ipc);
const char *(*request_wake_src)(struct wkup_m3_ipc *m3_ipc);
void (*set_rtc_only)(struct wkup_m3_ipc *m3_ipc);
};
struct wkup_m3_ipc *wkup_m3_ipc_get(void);
void wkup_m3_ipc_put(struct wkup_m3_ipc *m3_ipc);
void wkup_m3_set_rtc_only_mode(void);
#endif /* _LINUX_WKUP_M3_IPC_H */