[PATCH v2 07/40] soc/tegra: pmc: Implement tegra_io_pad_is_powered()
From: Aapo Vienamo <hidden>
Date: 2018-08-10 18:09:14
Also in:
linux-mmc, linux-tegra, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
Implement a function to query whether a pad is in deep power down mode. This is needed by the pinctrl callbacks. Signed-off-by: Aapo Vienamo <redacted> Acked-by: Jon Hunter <jonathanh@nvidia.com> --- drivers/soc/tegra/pmc.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index f88bcb6..eb9385f 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c@@ -1075,6 +1075,21 @@ int tegra_io_pad_power_disable(enum tegra_io_pad id) } EXPORT_SYMBOL(tegra_io_pad_power_disable); +static int tegra_io_pad_is_powered(enum tegra_io_pad id) +{ + unsigned long request, status; + u32 mask, value; + int err; + + err = tegra_io_pad_get_dpd_register_bit(id, &request, &status, &mask); + if (err) + return err; + + value = tegra_pmc_readl(status); + + return !(value & mask); +} + int tegra_io_pad_set_voltage(enum tegra_io_pad id, enum tegra_io_pad_voltage voltage) {
--
2.7.4