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rockchip: Init clocks again when chain-loading

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Detect with a previous boot loader has already set up the clocks and set
them up again so that U-Boot gets what it expects.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2017-05-31 17:57:32 -06:00
parent b223c1aead
commit d3cb46aa8c
1 changed files with 19 additions and 6 deletions
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25
drivers/clk/rockchip/clk_rk3288.c
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@ -131,10 +131,8 @@ enum {
/* Keep divisors as low as possible to reduce jitter and power usage */
static const struct pll_div apll_init_cfg = PLL_DIVISORS(APLL_HZ, 1, 1);
#ifdef CONFIG_SPL_BUILD
static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2);
static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 1, 2);
#endif
static int rkclk_set_pll(struct rk3288_cru *cru, enum rk_clk_id clk_id,
const struct pll_div *div)
@ -340,9 +338,8 @@ static int rockchip_vop_set_clk(struct rk3288_cru *cru, struct rk3288_grf *grf,
return 0;
}
#endif
#endif /* CONFIG_SPL_BUILD */
#ifdef CONFIG_SPL_BUILD
static void rkclk_init(struct rk3288_cru *cru, struct rk3288_grf *grf)
{
u32 aclk_div;
@ -416,7 +413,6 @@ static void rkclk_init(struct rk3288_cru *cru, struct rk3288_grf *grf)
GPLL_MODE_NORMAL << GPLL_MODE_SHIFT |
CPLL_MODE_NORMAL << CPLL_MODE_SHIFT);
}
#endif
void rk3288_clk_configure_cpu(struct rk3288_cru *cru, struct rk3288_grf *grf)
{
@ -786,6 +782,7 @@ static int rk3288_clk_ofdata_to_platdata(struct udevice *dev)
static int rk3288_clk_probe(struct udevice *dev)
{
struct rk3288_clk_priv *priv = dev_get_priv(dev);
bool init_clocks = false;
priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
if (IS_ERR(priv->grf))
@ -796,8 +793,24 @@ static int rk3288_clk_probe(struct udevice *dev)
priv->cru = map_sysmem(plat->dtd.reg[0], plat->dtd.reg[1]);
#endif
rkclk_init(priv->cru, priv->grf);
init_clocks = true;
#endif
if (!(gd->flags & GD_FLG_RELOC)) {
u32 reg;
/*
* Init clocks in U-Boot proper if the NPLL is runnning. This
* indicates that a previous boot loader set up the clocks, so
* we need to redo it. U-Boot's SPL does not set this clock.
*/
reg = readl(&priv->cru->cru_mode_con);
if (((reg & NPLL_MODE_MASK) >> NPLL_MODE_SHIFT) ==
NPLL_MODE_NORMAL)
init_clocks = true;
}
if (init_clocks)
rkclk_init(priv->cru, priv->grf);
return 0;
}