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soc/tegra: bpmp: Implement generic PM domains

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The BPMP firmware, found on Tegra186 and later, provides an ABI that can
be used to enable and disable power to several power partitions in Tegra
SoCs. The ABI allows for enumeration of the available power partitions,
so the driver can be reused on future generations, provided the BPMP ABI
remains stable.

Based on work by Stefan Kristiansson <stefank@nvidia.com> and Mikko
Perttunen <mperttunen@nvidia.com>.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding
2017-03-29 18:34:52 +02:00
parent 52b8b80395
commit e7149a7a3f
5 changed files with 381 additions and 0 deletions
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12
include/soc/tegra/bpmp.h
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@@ -15,6 +15,7 @@
#define __SOC_TEGRA_BPMP_H
#include <linux/mailbox_client.h>
#include <linux/pm_domain.h>
#include <linux/reset-controller.h>
#include <linux/semaphore.h>
#include <linux/types.h>
@@ -91,6 +92,8 @@ struct tegra_bpmp {
unsigned int num_clocks;
struct reset_controller_dev rstc;
struct genpd_onecell_data genpd;
};
struct tegra_bpmp *tegra_bpmp_get(struct device *dev);
@@ -138,4 +141,13 @@ static inline int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp)
}
#endif
#if IS_ENABLED(CONFIG_SOC_TEGRA_POWERGATE_BPMP)
int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp);
#else
static inline int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp)
{
return 0;
}
#endif
#endif /* __SOC_TEGRA_BPMP_H */