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drm/rockchip: protect loader clocks

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Change-Id: Ie9217de35ea1dc11d99b6340fc9f6ecc27ba33c8
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
This commit is contained in:
Mark Yao 2017-06-19 15:29:29 +08:00 committed by Huang, Tao
parent 779bec37f5
commit f917a54ff7
1 changed files with 50 additions and 0 deletions
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50
drivers/gpu/drm/rockchip/rockchip_drm_drv.c
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@ -28,6 +28,7 @@
#include <linux/of_address.h>
#include <linux/of_graph.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/component.h>
#include <linux/fence.h>
#include <linux/console.h>
@ -676,6 +677,55 @@ static void show_loader_logo(struct drm_device *drm_dev)
if (ret)
dev_err(drm_dev->dev, "failed to show loader logo\n");
}
static const char *const loader_protect_clocks[] __initconst = {
"hclk_vio",
"aclk_vio",
"aclk_vio0",
};
static struct clk **loader_clocks __initdata;
static int __init rockchip_clocks_loader_protect(void)
{
int nclocks = ARRAY_SIZE(loader_protect_clocks);
struct clk *clk;
int i;
loader_clocks = kcalloc(nclocks, sizeof(void *), GFP_KERNEL);
if (!loader_clocks)
return -ENOMEM;
for (i = 0; i < nclocks; i++) {
clk = __clk_lookup(loader_protect_clocks[i]);
if (clk) {
loader_clocks[i] = clk;
clk_prepare_enable(clk);
}
}
return 0;
}
fs_initcall(rockchip_clocks_loader_protect);
static int __init rockchip_clocks_loader_unprotect(void)
{
int i;
if (!loader_clocks)
return -ENODEV;
for (i = 0; i < ARRAY_SIZE(loader_protect_clocks); i++) {
struct clk *clk = loader_clocks[i];
if (clk)
clk_disable_unprepare(clk);
}
kfree(loader_clocks);
return 0;
}
late_initcall_sync(rockchip_clocks_loader_unprotect);
#endif
/*