From cd041c8041486e33516b8df53f937bb117b682d2 Mon Sep 17 00:00:00 2001 From: Lokesh Vutla Date: Fri, 7 Jun 2019 19:24:46 +0530 Subject: [PATCH] power: domain: ti_sci_power_domains: Add support for exclusive and shared access TISCI protocol supports for enabling the device either with exclusive permissions for the requesting host or with sharing across the hosts. There are certain devices which are exclusive to Linux context and there are certain devices that are shared across different host contexts. So add support for getting this information from DT by increasing the power-domain cells to 2. For keeping the DT backward compatibility intact, defaulting the device permissions to set the exclusive flag set. In this case the power-domain-cells is 1. Signed-off-by: Lokesh Vutla --- drivers/power/domain/ti-sci-power-domain.c | 31 +++++++++++++++++++++++++++++- 1 file changed, 30 insertions(+), 1 deletion(-) diff --git a/drivers/power/domain/ti-sci-power-domain.c b/drivers/power/domain/ti-sci-power-domain.c index aafde62..b9cd37b 100644 --- a/drivers/power/domain/ti-sci-power-domain.c +++ b/drivers/power/domain/ti-sci-power-domain.c @@ -13,6 +13,7 @@ #include #include #include +#include /** * struct ti_sci_power_domain_data - pm domain controller information structure @@ -56,11 +57,16 @@ static int ti_sci_power_domain_on(struct power_domain *pd) struct ti_sci_power_domain_data *data = dev_get_priv(pd->dev); const struct ti_sci_handle *sci = data->sci; const struct ti_sci_dev_ops *dops = &sci->ops.dev_ops; + u8 flags = (uintptr_t)pd->priv; int ret; debug("%s(pd=%p)\n", __func__, pd); - ret = dops->get_device(sci, pd->id); + if (flags & TI_SCI_PD_EXCLUSIVE) + ret = dops->get_device_exclusive(sci, pd->id); + else + ret = dops->get_device(sci, pd->id); + if (ret) dev_err(power_domain->dev, "%s: get_device failed (%d)\n", __func__, ret); @@ -85,6 +91,28 @@ static int ti_sci_power_domain_off(struct power_domain *pd) return ret; } +static int ti_sci_power_domain_of_xlate(struct power_domain *pd, + struct ofnode_phandle_args *args) +{ + u8 flags; + + debug("%s(power_domain=%p)\n", __func__, pd); + + if (args->args_count < 1) { + debug("Invalid args_count: %d\n", args->args_count); + return -EINVAL; + } + + pd->id = args->args[0]; + /* By default request for device exclusive */ + flags = TI_SCI_PD_EXCLUSIVE; + if (args->args_count == 2) + flags = args->args[1] & TI_SCI_PD_EXCLUSIVE; + pd->priv = (void *)(uintptr_t)flags; + + return 0; +} + static const struct udevice_id ti_sci_power_domain_of_match[] = { { .compatible = "ti,sci-pm-domain" }, { /* sentinel */ } @@ -95,6 +123,7 @@ static struct power_domain_ops ti_sci_power_domain_ops = { .free = ti_sci_power_domain_free, .on = ti_sci_power_domain_on, .off = ti_sci_power_domain_off, + .of_xlate = ti_sci_power_domain_of_xlate, }; U_BOOT_DRIVER(ti_sci_pm_domains) = { -- 2.7.4