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clk: sandbox: Create a special fixed-rate driver

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Create a version of this driver for sandbox so that it can use the
of-platdata struct.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-03-15 17:25:24 +13:00
parent 4ddc91b32f
commit 8813986dfd
4 changed files with 43 additions and 2 deletions
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2
arch/sandbox/dts/sandbox.dtsi
View File

@ -31,7 +31,7 @@
clk_fixed: clk-fixed {
u-boot,dm-pre-reloc;
compatible = "fixed-clock";
compatible = "sandbox,fixed-clock";
#clock-cells = <0>;
clock-frequency = <1234>;
};

8
arch/sandbox/include/asm/clk.h
View File

@ -61,6 +61,14 @@ struct sandbox_clk_test {
struct clk_bulk bulk;
};
/* Platform data for the sandbox fixed-rate clock driver */
struct sandbox_clk_fixed_rate_plat {
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct dtd_sandbox_fixed_clock dtplat;
#endif
struct clk_fixed_rate fixed;
};
/**
* sandbox_clk_query_rate - Query the current rate of a sandbox clock.
*

33
drivers/clk/clk_sandbox.c
View File

@ -9,6 +9,7 @@
#include <errno.h>
#include <malloc.h>
#include <asm/clk.h>
#include <linux/clk-provider.h>
static ulong sandbox_clk_get_rate(struct clk *clk)
{
@ -171,3 +172,35 @@ int sandbox_clk_query_requested(struct udevice *dev, int id)
return -EINVAL;
return priv->requested[id];
}
int clk_fixed_rate_of_to_plat(struct udevice *dev)
{
struct clk_fixed_rate *cplat;
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct sandbox_clk_fixed_rate_plat *plat = dev_get_plat(dev);
cplat = &plat->fixed;
cplat->fixed_rate = plat->dtplat.clock_frequency;
#else
cplat = to_clk_fixed_rate(dev);
#endif
clk_fixed_rate_ofdata_to_plat_(dev, cplat);
return 0;
}
static const struct udevice_id sandbox_clk_fixed_rate_match[] = {
{ .compatible = "sandbox,fixed-clock" },
{ /* sentinel */ }
};
U_BOOT_DRIVER(sandbox_fixed_clock) = {
.name = "sandbox_fixed_clock",
.id = UCLASS_CLK,
.of_match = sandbox_clk_fixed_rate_match,
.of_to_plat = clk_fixed_rate_of_to_plat,
.plat_auto = sizeof(struct sandbox_clk_fixed_rate_plat),
.ops = &clk_fixed_rate_ops,
.flags = DM_FLAG_PRE_RELOC,
};

2
test/dm/of_platdata.c
View File

@ -185,7 +185,7 @@ static int dm_test_of_plat_phandle(struct unit_test_state *uts)
plat = dev_get_plat(dev);
ut_assertok(device_get_by_driver_info_idx(plat->clocks[0].idx, &clk));
ut_asserteq_str("fixed_clock", clk->name);
ut_asserteq_str("sandbox_fixed_clock", clk->name);
ut_assertok(device_get_by_driver_info_idx(plat->clocks[1].idx, &clk));
ut_asserteq_str("sandbox_clk", clk->name);