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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-25 21:54:06 +08:00
linux-next/drivers/clk/clk-conf.c
Rob Herring 1667393126 clk: Convert to using %pOF instead of full_name
Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: "Emilio López" <emilio@elopez.com.ar>
Cc: Peter De Schrijver <pdeschrijver@nvidia.com>
Cc: Prashant Gaikwad <pgaikwad@nvidia.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Tero Kristo <t-kristo@ti.com>
Cc: linux-clk@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-renesas-soc@vger.kernel.org
Cc: linux-tegra@vger.kernel.org
Cc: linux-omap@vger.kernel.org
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: James Liao <jamesjj.liao@mediatek.com>
Acked-by: Alexandre TORGUE <alexandre.torgue@st.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2017-07-21 15:49:54 -07:00

148 lines
3.9 KiB
C

/*
* Copyright (C) 2014 Samsung Electronics Co., Ltd.
* Sylwester Nawrocki <s.nawrocki@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/clk/clk-conf.h>
#include <linux/device.h>
#include <linux/of.h>
#include <linux/printk.h>
static int __set_clk_parents(struct device_node *node, bool clk_supplier)
{
struct of_phandle_args clkspec;
int index, rc, num_parents;
struct clk *clk, *pclk;
num_parents = of_count_phandle_with_args(node, "assigned-clock-parents",
"#clock-cells");
if (num_parents == -EINVAL)
pr_err("clk: invalid value of clock-parents property at %pOF\n",
node);
for (index = 0; index < num_parents; index++) {
rc = of_parse_phandle_with_args(node, "assigned-clock-parents",
"#clock-cells", index, &clkspec);
if (rc < 0) {
/* skip empty (null) phandles */
if (rc == -ENOENT)
continue;
else
return rc;
}
if (clkspec.np == node && !clk_supplier)
return 0;
pclk = of_clk_get_from_provider(&clkspec);
if (IS_ERR(pclk)) {
if (PTR_ERR(pclk) != -EPROBE_DEFER)
pr_warn("clk: couldn't get parent clock %d for %pOF\n",
index, node);
return PTR_ERR(pclk);
}
rc = of_parse_phandle_with_args(node, "assigned-clocks",
"#clock-cells", index, &clkspec);
if (rc < 0)
goto err;
if (clkspec.np == node && !clk_supplier) {
rc = 0;
goto err;
}
clk = of_clk_get_from_provider(&clkspec);
if (IS_ERR(clk)) {
if (PTR_ERR(clk) != -EPROBE_DEFER)
pr_warn("clk: couldn't get assigned clock %d for %pOF\n",
index, node);
rc = PTR_ERR(clk);
goto err;
}
rc = clk_set_parent(clk, pclk);
if (rc < 0)
pr_err("clk: failed to reparent %s to %s: %d\n",
__clk_get_name(clk), __clk_get_name(pclk), rc);
clk_put(clk);
clk_put(pclk);
}
return 0;
err:
clk_put(pclk);
return rc;
}
static int __set_clk_rates(struct device_node *node, bool clk_supplier)
{
struct of_phandle_args clkspec;
struct property *prop;
const __be32 *cur;
int rc, index = 0;
struct clk *clk;
u32 rate;
of_property_for_each_u32(node, "assigned-clock-rates", prop, cur, rate) {
if (rate) {
rc = of_parse_phandle_with_args(node, "assigned-clocks",
"#clock-cells", index, &clkspec);
if (rc < 0) {
/* skip empty (null) phandles */
if (rc == -ENOENT)
continue;
else
return rc;
}
if (clkspec.np == node && !clk_supplier)
return 0;
clk = of_clk_get_from_provider(&clkspec);
if (IS_ERR(clk)) {
if (PTR_ERR(clk) != -EPROBE_DEFER)
pr_warn("clk: couldn't get clock %d for %pOF\n",
index, node);
return PTR_ERR(clk);
}
rc = clk_set_rate(clk, rate);
if (rc < 0)
pr_err("clk: couldn't set %s clk rate to %u (%d), current rate: %lu\n",
__clk_get_name(clk), rate, rc,
clk_get_rate(clk));
clk_put(clk);
}
index++;
}
return 0;
}
/**
* of_clk_set_defaults() - parse and set assigned clocks configuration
* @node: device node to apply clock settings for
* @clk_supplier: true if clocks supplied by @node should also be considered
*
* This function parses 'assigned-{clocks/clock-parents/clock-rates}' properties
* and sets any specified clock parents and rates. The @clk_supplier argument
* should be set to true if @node may be also a clock supplier of any clock
* listed in its 'assigned-clocks' or 'assigned-clock-parents' properties.
* If @clk_supplier is false the function exits returning 0 as soon as it
* determines the @node is also a supplier of any of the clocks.
*/
int of_clk_set_defaults(struct device_node *node, bool clk_supplier)
{
int rc;
if (!node)
return 0;
rc = __set_clk_parents(node, clk_supplier);
if (rc < 0)
return rc;
return __set_clk_rates(node, clk_supplier);
}
EXPORT_SYMBOL_GPL(of_clk_set_defaults);