10 #define pr_fmt(fmt)	"tegra voltage-coupler: " fmt
21 #include <soc/tegra/fuse.h>
22 #include <soc/tegra/pmc.h>
44 static int tegra20_core_limit(struct tegra_regulator_coupler *tegra,  in tegra20_core_limit()  argument
62 	if (tegra_pmc_core_domain_state_synced() && !tegra->sys_reboot_mode) {  in tegra20_core_limit()
67 	if (tegra->core_min_uV > 0)  in tegra20_core_limit()
68 		return tegra->core_min_uV;  in tegra20_core_limit()
85 	tegra->core_min_uV = core_max_uV;  in tegra20_core_limit()
87 	pr_info("core voltage initialized to %duV\n", tegra->core_min_uV);  in tegra20_core_limit()
89 	return tegra->core_min_uV;  in tegra20_core_limit()
135 static int tegra20_core_rtc_update(struct tegra_regulator_coupler *tegra,  in tegra20_core_rtc_update()  argument
161 	core_min_uV = tegra20_core_limit(tegra, core_rdev);  in tegra20_core_rtc_update()
175 	if (tegra->sys_suspend_mode)  in tegra20_core_rtc_update()
254 static int tegra20_core_voltage_update(struct tegra_regulator_coupler *tegra,  in tegra20_core_voltage_update()  argument
265 	return tegra20_core_rtc_update(tegra, core_rdev, rtc_rdev,  in tegra20_core_voltage_update()
269 static int tegra20_cpu_voltage_update(struct tegra_regulator_coupler *tegra,  in tegra20_cpu_voltage_update()  argument
299 	if (!tegra->cpu_min_uV)  in tegra20_cpu_voltage_update()
300 		tegra->cpu_min_uV = cpu_uV;  in tegra20_cpu_voltage_update()
311 	if (tegra->sys_reboot_mode)  in tegra20_cpu_voltage_update()
312 		cpu_min_uV = max(cpu_min_uV, tegra->cpu_min_uV);  in tegra20_cpu_voltage_update()
315 	if (tegra->sys_suspend_mode)  in tegra20_cpu_voltage_update()
320 		err = tegra20_core_rtc_update(tegra, core_rdev, rtc_rdev,  in tegra20_cpu_voltage_update()
335 		err = tegra20_core_rtc_update(tegra, core_rdev, rtc_rdev,  in tegra20_cpu_voltage_update()
348 	struct tegra_regulator_coupler *tegra = to_tegra_coupler(coupler);  in tegra20_regulator_balance_voltage()  local
349 	struct regulator_dev *core_rdev = tegra->core_rdev;  in tegra20_regulator_balance_voltage()
350 	struct regulator_dev *cpu_rdev = tegra->cpu_rdev;  in tegra20_regulator_balance_voltage()
351 	struct regulator_dev *rtc_rdev = tegra->rtc_rdev;  in tegra20_regulator_balance_voltage()
359 	tegra->sys_reboot_mode = READ_ONCE(tegra->sys_reboot_mode_req);  in tegra20_regulator_balance_voltage()
360 	tegra->sys_suspend_mode = READ_ONCE(tegra->sys_suspend_mode_req);  in tegra20_regulator_balance_voltage()
363 		return tegra20_cpu_voltage_update(tegra, cpu_rdev,  in tegra20_regulator_balance_voltage()
367 		return tegra20_core_voltage_update(tegra, cpu_rdev,  in tegra20_regulator_balance_voltage()
375 static int tegra20_regulator_prepare_suspend(struct tegra_regulator_coupler *tegra,  in tegra20_regulator_prepare_suspend()  argument
380 	if (!tegra->core_rdev || !tegra->rtc_rdev || !tegra->cpu_rdev)  in tegra20_regulator_prepare_suspend()
390 	WRITE_ONCE(tegra->sys_suspend_mode_req, sys_suspend_mode);  in tegra20_regulator_prepare_suspend()
392 	err = regulator_sync_voltage_rdev(tegra->cpu_rdev);  in tegra20_regulator_prepare_suspend()
396 	err = regulator_sync_voltage_rdev(tegra->core_rdev);  in tegra20_regulator_prepare_suspend()
406 	struct tegra_regulator_coupler *tegra;  in tegra20_regulator_suspend()  local
409 	tegra = container_of(notifier, struct tegra_regulator_coupler,  in tegra20_regulator_suspend()
416 		ret = tegra20_regulator_prepare_suspend(tegra, true);  in tegra20_regulator_suspend()
422 		ret = tegra20_regulator_prepare_suspend(tegra, false);  in tegra20_regulator_suspend()
432 static int tegra20_regulator_prepare_reboot(struct tegra_regulator_coupler *tegra,  in tegra20_regulator_prepare_reboot()  argument
437 	if (!tegra->core_rdev || !tegra->rtc_rdev || !tegra->cpu_rdev)  in tegra20_regulator_prepare_reboot()
440 	WRITE_ONCE(tegra->sys_reboot_mode_req, true);  in tegra20_regulator_prepare_reboot()
447 	err = regulator_sync_voltage_rdev(tegra->cpu_rdev);  in tegra20_regulator_prepare_reboot()
451 	err = regulator_sync_voltage_rdev(tegra->core_rdev);  in tegra20_regulator_prepare_reboot()
455 	WRITE_ONCE(tegra->sys_reboot_mode_req, sys_reboot_mode);  in tegra20_regulator_prepare_reboot()
463 	struct tegra_regulator_coupler *tegra;  in tegra20_regulator_reboot()  local
469 	tegra = container_of(notifier, struct tegra_regulator_coupler,  in tegra20_regulator_reboot()
472 	ret = tegra20_regulator_prepare_reboot(tegra, true);  in tegra20_regulator_reboot()
480 	struct tegra_regulator_coupler *tegra = to_tegra_coupler(coupler);  in tegra20_regulator_attach()  local
483 	if (of_property_read_bool(np, "nvidia,tegra-core-regulator") &&  in tegra20_regulator_attach()
484 	    !tegra->core_rdev) {  in tegra20_regulator_attach()
485 		tegra->core_rdev = rdev;  in tegra20_regulator_attach()
489 	if (of_property_read_bool(np, "nvidia,tegra-rtc-regulator") &&  in tegra20_regulator_attach()
490 	    !tegra->rtc_rdev) {  in tegra20_regulator_attach()
491 		tegra->rtc_rdev = rdev;  in tegra20_regulator_attach()
495 	if (of_property_read_bool(np, "nvidia,tegra-cpu-regulator") &&  in tegra20_regulator_attach()
496 	    !tegra->cpu_rdev) {  in tegra20_regulator_attach()
497 		tegra->cpu_rdev = rdev;  in tegra20_regulator_attach()
507 	struct tegra_regulator_coupler *tegra = to_tegra_coupler(coupler);  in tegra20_regulator_detach()  local
517 	if (tegra->core_rdev == rdev) {  in tegra20_regulator_detach()
518 		tegra->core_rdev = NULL;  in tegra20_regulator_detach()
522 	if (tegra->rtc_rdev == rdev) {  in tegra20_regulator_detach()
523 		tegra->rtc_rdev = NULL;  in tegra20_regulator_detach()
527 	if (tegra->cpu_rdev == rdev) {  in tegra20_regulator_detach()
528 		tegra->cpu_rdev = NULL;  in tegra20_regulator_detach()