From: Sowjanya Komatineni <skomatineni@nvidia.com>
To: <thierry.reding@gmail.com>, <jonathanh@nvidia.com>,
<tglx@linutronix.de>, <jason@lakedaemon.net>,
<marc.zyngier@arm.com>, <linus.walleij@linaro.org>,
<stefan@agner.ch>, <mark.rutland@arm.com>
Cc: <pdeschrijver@nvidia.com>, <pgaikwad@nvidia.com>,
<sboyd@kernel.org>, <linux-clk@vger.kernel.org>,
<linux-gpio@vger.kernel.org>, <jckuo@nvidia.com>,
<josephl@nvidia.com>, <talho@nvidia.com>,
<skomatineni@nvidia.com>, <linux-tegra@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <mperttunen@nvidia.com>,
<spatra@nvidia.com>, <robh+dt@kernel.org>, <digetx@gmail.com>,
<devicetree@vger.kernel.org>, <rjw@rjwysocki.net>,
<viresh.kumar@linaro.org>, <linux-pm@vger.kernel.org>
Subject: [PATCH v8 07/21] clk: Add API to get index of the clock parent
Date: Thu, 8 Aug 2019 16:46:46 -0700 [thread overview]
Message-ID: <1565308020-31952-8-git-send-email-skomatineni@nvidia.com> (raw)
In-Reply-To: <1565308020-31952-1-git-send-email-skomatineni@nvidia.com>
This patch adds an API clk_hw_get_parent_index to get index of the
clock parent to use during the clock restore operations on system
resume.
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
---
drivers/clk/clk.c | 17 +++++++++++++++++
include/linux/clk-provider.h | 1 +
2 files changed, 18 insertions(+)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index c0990703ce54..f26252e48f73 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1643,6 +1643,23 @@ static int clk_fetch_parent_index(struct clk_core *core,
return i;
}
+/**
+ * clk_hw_get_parent_index - return the index of parent clock
+ * @hw: clk_hw associated with the clk being consumed
+ * @parent_hw: clk_hw associated with the parent of clk
+ *
+ * Fetches and returns the index of parent clock.
+ * if hw or parent_hw is NULL, returns -EINVAL.
+ */
+int clk_hw_get_parent_index(struct clk_hw *hw, struct clk_hw *parent_hw)
+{
+ if (!hw || !parent_hw)
+ return -EINVAL;
+
+ return clk_fetch_parent_index(hw->core, parent_hw->core);
+}
+EXPORT_SYMBOL_GPL(clk_hw_get_parent_index);
+
/*
* Update the orphan status of @core and all its children.
*/
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 2ae7604783dd..477112946dd2 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -817,6 +817,7 @@ unsigned int clk_hw_get_num_parents(const struct clk_hw *hw);
struct clk_hw *clk_hw_get_parent(const struct clk_hw *hw);
struct clk_hw *clk_hw_get_parent_by_index(const struct clk_hw *hw,
unsigned int index);
+int clk_hw_get_parent_index(struct clk_hw *hw, struct clk_hw *parent_hw);
unsigned int __clk_get_enable_count(struct clk *clk);
unsigned long clk_hw_get_rate(const struct clk_hw *hw);
unsigned long __clk_get_flags(struct clk *clk);
--
2.7.4
next prev parent reply other threads:[~2019-08-08 23:48 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-08 23:46 [PATCH v8 00/21] SC7 entry and exit support for Tegra210 Sowjanya Komatineni
2019-08-08 23:46 ` [PATCH v8 01/21] pinctrl: tegra: Fix write barrier placement in pmx_writel Sowjanya Komatineni
2019-08-09 11:38 ` Dmitry Osipenko
2019-08-12 9:20 ` Thierry Reding
2019-08-14 8:32 ` Linus Walleij
2019-08-08 23:46 ` [PATCH v8 02/21] pinctrl: tegra: Add write barrier after all pinctrl register writes Sowjanya Komatineni
2019-08-09 11:39 ` Dmitry Osipenko
2019-08-12 9:20 ` Thierry Reding
2019-08-14 8:33 ` Linus Walleij
2019-08-08 23:46 ` [PATCH v8 03/21] clk: tegra: divider: Save and restore divider rate Sowjanya Komatineni
2019-08-12 9:21 ` Thierry Reding
2019-08-08 23:46 ` [PATCH v8 04/21] clk: tegra: pllout: Save and restore pllout context Sowjanya Komatineni
2019-08-11 18:04 ` Dmitry Osipenko
2019-08-08 23:46 ` [PATCH v8 05/21] clk: tegra: pll: Save and restore pll context Sowjanya Komatineni
2019-08-09 11:33 ` Dmitry Osipenko
2019-08-09 17:39 ` Sowjanya Komatineni
2019-08-09 17:50 ` Dmitry Osipenko
2019-08-09 18:50 ` Sowjanya Komatineni
2019-08-11 17:24 ` Dmitry Osipenko
2019-08-09 12:46 ` Dmitry Osipenko
2019-08-08 23:46 ` [PATCH v8 06/21] clk: tegra: Support for OSC context save and restore Sowjanya Komatineni
2019-08-08 23:46 ` Sowjanya Komatineni [this message]
2019-08-09 11:49 ` [PATCH v8 07/21] clk: Add API to get index of the clock parent Dmitry Osipenko
2019-08-12 9:47 ` Thierry Reding
2019-08-08 23:46 ` [PATCH v8 08/21] clk: tegra: periph: Add restore_context support Sowjanya Komatineni
2019-08-09 11:55 ` Dmitry Osipenko
2019-08-09 12:20 ` Dmitry Osipenko
2019-08-09 16:55 ` Sowjanya Komatineni
2019-08-12 9:50 ` Thierry Reding
2019-08-08 23:46 ` [PATCH v8 09/21] clk: tegra: clk-super: Fix to enable PLLP branches to CPU Sowjanya Komatineni
2019-08-09 12:11 ` Dmitry Osipenko
2019-08-12 9:53 ` Thierry Reding
2019-08-08 23:46 ` [PATCH v8 10/21] clk: tegra: clk-super: Add restore-context support Sowjanya Komatineni
2019-08-09 12:17 ` Dmitry Osipenko
2019-08-09 17:08 ` Sowjanya Komatineni
2019-08-11 17:29 ` Dmitry Osipenko
2019-08-12 9:55 ` Thierry Reding
2019-08-08 23:46 ` [PATCH v8 11/21] clk: tegra: clk-dfll: Add suspend and resume support Sowjanya Komatineni
2019-08-09 12:23 ` Dmitry Osipenko
2019-08-09 16:39 ` Sowjanya Komatineni
2019-08-09 18:00 ` Dmitry Osipenko
2019-08-09 18:33 ` Sowjanya Komatineni
2019-08-09 18:52 ` Dmitry Osipenko
2019-08-12 10:01 ` Thierry Reding
2019-08-08 23:46 ` [PATCH v8 12/21] cpufreq: tegra124: " Sowjanya Komatineni
2019-08-12 10:07 ` Thierry Reding
2019-08-08 23:46 ` [PATCH v8 13/21] clk: tegra210: Use fence_udelay during PLLU init Sowjanya Komatineni
2019-08-11 18:02 ` Dmitry Osipenko
2019-08-11 19:16 ` Sowjanya Komatineni
2019-08-08 23:46 ` [PATCH v8 14/21] clk: tegra210: Add suspend and resume support Sowjanya Komatineni
2019-08-09 13:56 ` Dmitry Osipenko
2019-08-09 16:19 ` Sowjanya Komatineni
2019-08-09 18:18 ` Dmitry Osipenko
[not found] ` <cbe94f84-a17b-7e1a-811d-89db571784e1@nvidia.com>
2019-08-11 17:39 ` Dmitry Osipenko
2019-08-11 19:15 ` Sowjanya Komatineni
2019-08-12 16:25 ` Dmitry Osipenko
2019-08-12 17:28 ` Sowjanya Komatineni
2019-08-12 18:19 ` Dmitry Osipenko
2019-08-12 19:03 ` Sowjanya Komatineni
2019-08-12 20:28 ` Dmitry Osipenko
2019-08-12 10:17 ` Thierry Reding
2019-08-08 23:46 ` [PATCH v8 15/21] soc/tegra: pmc: Allow to support more tegras wake Sowjanya Komatineni
2019-08-11 17:52 ` Dmitry Osipenko
2019-08-08 23:46 ` [PATCH v8 16/21] soc/tegra: pmc: Add pmc wake support for tegra210 Sowjanya Komatineni
2019-08-09 13:28 ` Dmitry Osipenko
2019-08-08 23:46 ` [PATCH v8 17/21] arm64: tegra: Enable wake from deep sleep on RTC alarm Sowjanya Komatineni
2019-08-08 23:46 ` [PATCH v8 18/21] soc/tegra: pmc: Configure core power request polarity Sowjanya Komatineni
2019-08-09 13:13 ` Dmitry Osipenko
2019-08-08 23:46 ` [PATCH v8 19/21] soc/tegra: pmc: Configure deep sleep control settings Sowjanya Komatineni
2019-08-09 13:23 ` Dmitry Osipenko
2019-08-09 16:23 ` Sowjanya Komatineni
2019-08-09 17:24 ` Sowjanya Komatineni
2019-08-09 18:22 ` Dmitry Osipenko
2019-08-08 23:46 ` [PATCH v8 20/21] arm64: dts: tegra210-p2180: Jetson TX1 SC7 timings Sowjanya Komatineni
2019-08-08 23:47 ` [PATCH v8 21/21] arm64: dts: tegra210-p3450: Jetson Nano " Sowjanya Komatineni
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