From: Aapo Vienamo <avienamo@nvidia.com>
To: Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Mikko Perttunen <mperttunen@nvidia.com>
Cc: Aapo Vienamo <avienamo@nvidia.com>, <devicetree@vger.kernel.org>,
<linux-tegra@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH 3/6] soc/tegra: pmc: Implement tegra_io_pad_is_powered()
Date: Tue, 10 Jul 2018 15:47:56 +0300 [thread overview]
Message-ID: <1531226879-11802-4-git-send-email-avienamo@nvidia.com> (raw)
In-Reply-To: <1531226879-11802-1-git-send-email-avienamo@nvidia.com>
Implement a function to query whether a pad is in deep power down mode.
Signed-off-by: Aapo Vienamo <avienamo@nvidia.com>
---
drivers/soc/tegra/pmc.c | 17 +++++++++++++++++
include/soc/tegra/pmc.h | 1 +
2 files changed, 18 insertions(+)
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index 83b39cd..3f5b69fd 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -1075,6 +1075,23 @@ int tegra_io_pad_power_disable(enum tegra_io_pad id)
}
EXPORT_SYMBOL(tegra_io_pad_power_disable);
+int tegra_io_pad_is_powered(enum tegra_io_pad id)
+{
+ unsigned long request, status;
+ u32 mask;
+ u32 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);
+}
+EXPORT_SYMBOL(tegra_io_pad_is_powered);
+
int tegra_io_pad_set_voltage(enum tegra_io_pad id,
enum tegra_io_pad_voltage voltage)
{
diff --git a/include/soc/tegra/pmc.h b/include/soc/tegra/pmc.h
index c32bf91..f88c6e2 100644
--- a/include/soc/tegra/pmc.h
+++ b/include/soc/tegra/pmc.h
@@ -162,6 +162,7 @@ int tegra_powergate_sequence_power_up(unsigned int id, struct clk *clk,
int tegra_io_pad_power_enable(enum tegra_io_pad id);
int tegra_io_pad_power_disable(enum tegra_io_pad id);
+int tegra_io_pad_is_powered(enum tegra_io_pad id);
int tegra_io_pad_set_voltage(enum tegra_io_pad id,
enum tegra_io_pad_voltage voltage);
int tegra_io_pad_get_voltage(enum tegra_io_pad id);
--
2.7.4
next prev parent reply other threads:[~2018-07-10 12:48 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-10 12:47 [PATCH 0/6] Tegra PMC pinctrl pad configuration Aapo Vienamo
2018-07-10 12:47 ` [PATCH 1/6] soc/tegra: pmc: Fix pad voltage configuration for Tegra186 Aapo Vienamo
2018-07-11 8:08 ` Jon Hunter
2018-07-10 12:47 ` [PATCH 2/6] soc/tegra: pmc: Factor out DPD register bit calculation Aapo Vienamo
2018-07-11 8:24 ` Jon Hunter
2018-07-10 12:47 ` Aapo Vienamo [this message]
2018-07-11 8:27 ` [PATCH 3/6] soc/tegra: pmc: Implement tegra_io_pad_is_powered() Jon Hunter
2018-07-10 12:47 ` [PATCH 4/6] soc/tegra: pmc: Use X macro to generate IO pad tables Aapo Vienamo
2018-07-11 8:30 ` Jon Hunter
2018-07-11 9:23 ` Aapo Vienamo
2018-07-11 9:43 ` Jon Hunter
2018-07-10 12:54 ` [PATCH 5/6] dt-bindings: Add Tegra PMC pad configuration bindings Aapo Vienamo
2018-07-11 8:32 ` Jon Hunter
2018-07-10 12:54 ` [PATCH 6/6] soc/tegra: pmc: Implement pad configuration via pinctrl Aapo Vienamo
2018-07-11 8:40 ` Jon Hunter
2018-07-11 9:38 ` Aapo Vienamo
2018-07-11 9:46 ` Jon Hunter
2018-07-11 10:12 ` Aapo Vienamo
2018-07-11 11:42 ` Jon Hunter
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