u-boot/arch/arm/mach-rockchip/board.c
Stephen Warren 135aa95002 clk: convert API to match reset/mailbox style
The following changes are made to the clock API:
* The concept of "clocks" and "peripheral clocks" are unified; each clock
  provider now implements a single set of clocks. This provides a simpler
  conceptual interface to clients, and better aligns with device tree
  clock bindings.
* Clocks are now identified with a single "struct clk", rather than
  requiring clients to store the clock provider device and clock identity
  values separately. For simple clock consumers, this isolates clients
  from internal details of the clock API.
* clk.h is split so it only contains the client/consumer API, whereas
  clk-uclass.h contains the provider API. This aligns with the recently
  added reset and mailbox APIs.
* clk_ops .of_xlate(), .request(), and .free() are added so providers
  can customize these operations if needed. This also aligns with the
  recently added reset and mailbox APIs.
* clk_disable() is added.
* All users of the current clock APIs are updated.
* Sandbox clock tests are updated to exercise clock lookup via DT, and
  clock enable/disable.
* rkclk_get_clk() is removed and replaced with standard APIs.

Buildman shows no clock-related errors for any board for which buildman
can download a toolchain.

test/py passes for sandbox (which invokes the dm clk test amongst
others).

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
2016-06-19 17:05:55 -06:00

104 lines
1.7 KiB
C

/*
* (C) Copyright 2015 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <ram.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
DECLARE_GLOBAL_DATA_PTR;
int board_init(void)
{
return 0;
}
int dram_init(void)
{
struct ram_info ram;
struct udevice *dev;
int ret;
ret = uclass_get_device(UCLASS_RAM, 0, &dev);
if (ret) {
debug("DRAM init failed: %d\n", ret);
return ret;
}
ret = ram_get_info(dev, &ram);
if (ret) {
debug("Cannot get DRAM size: %d\n", ret);
return ret;
}
debug("SDRAM base=%lx, size=%x\n", ram.base, ram.size);
gd->ram_size = ram.size;
return 0;
}
#ifndef CONFIG_SYS_DCACHE_OFF
void enable_caches(void)
{
/* Enable D-cache. I-cache is already enabled in start.S */
dcache_enable();
}
#endif
void lowlevel_init(void)
{
}
static int do_clock(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
static const struct {
char *name;
int id;
} clks[] = {
{ "osc", CLK_OSC },
{ "apll", CLK_ARM },
{ "dpll", CLK_DDR },
{ "cpll", CLK_CODEC },
{ "gpll", CLK_GENERAL },
#ifdef CONFIG_ROCKCHIP_RK3036
{ "mpll", CLK_NEW },
#else
{ "npll", CLK_NEW },
#endif
};
int ret, i;
struct udevice *dev;
ret = uclass_get_device(UCLASS_CLK, 0, &dev);
if (ret) {
printf("clk-uclass not found\n");
return 0;
}
for (i = 0; i < ARRAY_SIZE(clks); i++) {
struct clk clk;
ulong rate;
clk.id = clks[i].id;
ret = clk_request(dev, &clk);
if (ret < 0)
continue;
rate = clk_get_rate(&clk);
printf("%s: %lu\n", clks[i].name, rate);
clk_free(&clk);
}
return 0;
}
U_BOOT_CMD(
clock, 2, 1, do_clock,
"display information about clocks",
""
);