linux/drivers/clk/sunxi/clk-sun6i-apb0-gates.c
Paul Gortmaker 439a36d7d9 clk: sunxi: make clk-* explicitly non-modular
We have the following file --> Kconfig mapping:

sunxi/clk-factors.c              obj-y
sunxi/clk-sun6i-apb0-gates.c     CONFIG_MFD_SUN6I_PRCM (bool)
sunxi/clk-sun6i-apb0.c           CONFIG_MFD_SUN6I_PRCM
sunxi/clk-sun6i-ar100.c          CONFIG_MFD_SUN6I_PRCM
sunxi/clk-sun8i-apb0.c           CONFIG_MFD_SUN6I_PRCM
sunxi/clk-sun9i-mmc.c            obj-y

Hence none of these are being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the drivers there is no doubt they are builtin-only.  All
drivers get mostly the same changes, so they are handled in batch.

Changes are (1) convert to builtin_platform_register, (2) use the
init.h header, (3) delete the MODULE_LICENCE/MODULE_AUTHOR and
associated tags, and (4) delete any ".remove" functions.

There was a stray module.h in a file not using any init.h or
module.h stuff, so we simply removed that one.

In two cases, we explicitly disallow a driver unbind, since that
doesn't have a sensible use case anyway, and it allows us to drop
the ".remove" code for non-modular drivers.

Since module_platform_driver() uses the same init level priority as
builtin_platform_driver() the init ordering remains unchanged with
this commit.

We delete the MODULE_LICENSE etc. tags since all that information
is already contained at the top of each file in the comments.

Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: "Emilio López" <emilio@elopez.com.ar>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: linux-clk@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160704211220.5685-9-paul.gortmaker@windriver.com
2016-07-06 15:20:34 -07:00

105 lines
2.7 KiB
C

/*
* Copyright (C) 2014 Free Electrons
*
* License Terms: GNU General Public License v2
* Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
*
* Allwinner A31 APB0 clock gates driver
*
*/
#include <linux/clk-provider.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#define SUN6I_APB0_GATES_MAX_SIZE 32
struct gates_data {
DECLARE_BITMAP(mask, SUN6I_APB0_GATES_MAX_SIZE);
};
static const struct gates_data sun6i_a31_apb0_gates __initconst = {
.mask = {0x7F},
};
static const struct gates_data sun8i_a23_apb0_gates __initconst = {
.mask = {0x5D},
};
static const struct of_device_id sun6i_a31_apb0_gates_clk_dt_ids[] = {
{ .compatible = "allwinner,sun6i-a31-apb0-gates-clk", .data = &sun6i_a31_apb0_gates },
{ .compatible = "allwinner,sun8i-a23-apb0-gates-clk", .data = &sun8i_a23_apb0_gates },
{ /* sentinel */ }
};
static int sun6i_a31_apb0_gates_clk_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct clk_onecell_data *clk_data;
const struct of_device_id *device;
const struct gates_data *data;
const char *clk_parent;
const char *clk_name;
struct resource *r;
void __iomem *reg;
int ngates;
int i;
int j = 0;
if (!np)
return -ENODEV;
device = of_match_device(sun6i_a31_apb0_gates_clk_dt_ids, &pdev->dev);
if (!device)
return -ENODEV;
data = device->data;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
reg = devm_ioremap_resource(&pdev->dev, r);
if (IS_ERR(reg))
return PTR_ERR(reg);
clk_parent = of_clk_get_parent_name(np, 0);
if (!clk_parent)
return -EINVAL;
clk_data = devm_kzalloc(&pdev->dev, sizeof(struct clk_onecell_data),
GFP_KERNEL);
if (!clk_data)
return -ENOMEM;
/* Worst-case size approximation and memory allocation */
ngates = find_last_bit(data->mask, SUN6I_APB0_GATES_MAX_SIZE);
clk_data->clks = devm_kcalloc(&pdev->dev, (ngates + 1),
sizeof(struct clk *), GFP_KERNEL);
if (!clk_data->clks)
return -ENOMEM;
for_each_set_bit(i, data->mask, SUN6I_APB0_GATES_MAX_SIZE) {
of_property_read_string_index(np, "clock-output-names",
j, &clk_name);
clk_data->clks[i] = clk_register_gate(&pdev->dev, clk_name,
clk_parent, 0, reg, i,
0, NULL);
WARN_ON(IS_ERR(clk_data->clks[i]));
j++;
}
clk_data->clk_num = ngates + 1;
return of_clk_add_provider(np, of_clk_src_onecell_get, clk_data);
}
static struct platform_driver sun6i_a31_apb0_gates_clk_driver = {
.driver = {
.name = "sun6i-a31-apb0-gates-clk",
.of_match_table = sun6i_a31_apb0_gates_clk_dt_ids,
},
.probe = sun6i_a31_apb0_gates_clk_probe,
};
builtin_platform_driver(sun6i_a31_apb0_gates_clk_driver);