Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 2e9944e9 authored by Osvaldo Banuelos's avatar Osvaldo Banuelos Committed by Kyle Yan
Browse files

clk: msm: osm: add panic handler to dump status registers 



Add a panic handler to dump the OS performance state,
program counter OSM watchdog registers, and the APM status
register when the device crashes due to a kernel panic.
These are critical registers that are useful for debug.

CRs-Fixed: 1033031
Change-Id: I2bbf6884cf83457bfb7e5369bb97614bd4beb150
Signed-off-by: default avatarOsvaldo Banuelos <osvaldob@codeaurora.org>
parent 24edbd9f

drivers/clk/msm/clock-osm.c

+50 −0
Original line number Diff line number Diff line
@@ -105,6 +105,9 @@ enum clk_osm_trace_packet_id { 
#define OSM_CORE_TABLE_SIZE 8192

#define OSM_REG_SIZE 32



#define WDOG_DOMAIN_PSTATE_STATUS	0x1c00

#define WDOG_PROGRAM_COUNTER		0x1c74



#define OSM_CYCLE_COUNTER_USE_XO_EDGE_EN BIT(8)

#define PLL_MODE		0x0

#define PLL_L_VAL		0x4
@@ -323,6 +326,7 @@ struct clk_osm { 


	enum clk_osm_trace_method trace_method;

	enum clk_osm_trace_packet_id trace_id;

	struct notifier_block panic_notifier;

	u32 trace_periodic_timer;

	bool trace_en;

};
@@ -2248,6 +2252,45 @@ exit: 
		debugfs_remove_recursive(c->debugfs);

}



static int clk_osm_panic_callback(struct notifier_block *nfb,

				  unsigned long event,

				  void *data)

{

	void __iomem *virt_addr;

	u32 value, reg;

	struct clk_osm *c = container_of(nfb,

					 struct clk_osm,

					 panic_notifier);



	reg = c->pbases[OSM_BASE] + WDOG_DOMAIN_PSTATE_STATUS;

	virt_addr = ioremap(reg, 0x4);

	if (virt_addr != NULL) {

		value = readl_relaxed(virt_addr);

		pr_err("DOM%d_PSTATE_STATUS[0x%08x]=0x%08x\n", c->cluster_num,

		       reg, value);

		iounmap(virt_addr);

	}



	reg = c->pbases[OSM_BASE] + WDOG_PROGRAM_COUNTER;

	virt_addr = ioremap(reg, 0x4);

	if (virt_addr != NULL) {

		value = readl_relaxed(virt_addr);

		pr_err("DOM%d_PROGRAM_COUNTER[0x%08x]=0x%08x\n", c->cluster_num,

		       reg, value);

		iounmap(virt_addr);

	}



	virt_addr = ioremap(c->apm_ctrl_status, 0x4);

	if (virt_addr != NULL) {

		value = readl_relaxed(virt_addr);

		pr_err("APM_CTLER_STATUS_%d[0x%08x]=0x%08x\n", c->cluster_num,

		       c->apm_ctrl_status, value);

		iounmap(virt_addr);

	}



	return NOTIFY_OK;

}



static unsigned long init_rate = 300000000;

static unsigned long osm_clk_init_rate = 200000000;
@@ -2393,6 +2436,13 @@ static int cpu_clock_osm_driver_probe(struct platform_device *pdev) 
	spin_lock_init(&pwrcl_clk.lock);

	spin_lock_init(&perfcl_clk.lock);



	pwrcl_clk.panic_notifier.notifier_call = clk_osm_panic_callback;

	atomic_notifier_chain_register(&panic_notifier_list,

				       &pwrcl_clk.panic_notifier);

	perfcl_clk.panic_notifier.notifier_call = clk_osm_panic_callback;

	atomic_notifier_chain_register(&panic_notifier_list,

				       &perfcl_clk.panic_notifier);



	rc = of_msm_clock_register(pdev->dev.of_node, cpu_clocks_osm,

				   ARRAY_SIZE(cpu_clocks_osm));

	if (rc) {