Hi Philipp,
On 08/31/2017 06:25 PM, Andy Yan wrote:
Hi Philipp:
On 2017年08月28日 04:21, Dr. Philipp Tomsich wrote:
On 23 Aug 2017, at 09:26, Andy Yan andy.yan@rock-chips.com wrote:
commit 4bebf94e8544("rockchip: clk: rk3368: do not change CPLL/GPLL before returning to BROM") limits the pll can only be setup in SPL stage, but there are still some rk3368 based boards have not use SPL yet, so they need run rkclk_init to setup the pll in full u-boot stage, otherwise the clk_set_rate function will run into wrong logic, because it assume that all the pll have been set to the desired frequency.
If SPL is enabled, rkclk_init should not be called from the full U-Boot, though. I.e. we’ll need an appropriate conditional test to check whether SPL is enabled or not...
Do you have any ideas here?
There should have some memory could be pass from SPL (optionally via ATF/OPTEE) to U-Boot, may including information like this, - hardware module info/status already known in previous stage, like dram cap in sysreg, - the boot device, boot rom boot from SD card, then U-Boot prefer to boot from SD card, - Android O, there is a A/B slot select, if we detect it in SPL, then we can pass it to U-Boot and etc.
Maybe we can have a vendor defined structure locate in a reserved memory like boot0hook?
Thanks, - Kever
Signed-off-by: Andy Yan andy.yan@rock-chips.com
drivers/clk/rockchip/clk_rk3368.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-)
diff --git a/drivers/clk/rockchip/clk_rk3368.c b/drivers/clk/rockchip/clk_rk3368.c index 2be1f57..ee754f0 100644 --- a/drivers/clk/rockchip/clk_rk3368.c +++ b/drivers/clk/rockchip/clk_rk3368.c @@ -47,14 +47,12 @@ struct pll_div { (_nr * _no) == hz, #hz "Hz cannot be hit with PLL " \ "divisors on line " __stringify(__LINE__));
-#if IS_ENABLED(CONFIG_SPL_BUILD) || IS_ENABLED(CONFIG_TPL_BUILD) static const struct pll_div apll_l_init_cfg = PLL_DIVISORS(APLL_L_HZ, 12, 2); static const struct pll_div apll_b_init_cfg = PLL_DIVISORS(APLL_B_HZ, 1, 2); #if !defined(CONFIG_TPL_BUILD) static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 1, 2); static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 1, 6); #endif -#endif
static ulong rk3368_clk_get_rate(struct clk *clk);
@@ -85,7 +83,6 @@ static uint32_t rkclk_pll_get_rate(struct rk3368_cru *cru, } }
-#if IS_ENABLED(CONFIG_SPL_BUILD) || IS_ENABLED(CONFIG_TPL_BUILD) static int rkclk_set_pll(struct rk3368_cru *cru, enum rk3368_pll_id pll_id, const struct pll_div *div) { @@ -125,9 +122,7 @@ static int rkclk_set_pll(struct rk3368_cru *cru, enum rk3368_pll_id pll_id, seamless return 0; } -#endif
-#if IS_ENABLED(CONFIG_SPL_BUILD) || IS_ENABLED(CONFIG_TPL_BUILD) static void rkclk_init(struct rk3368_cru *cru) { u32 apllb, aplll, dpll, cpll, gpll; @@ -152,7 +147,7 @@ static void rkclk_init(struct rk3368_cru *cru) debug("%s apllb(%d) apll(%d) dpll(%d) cpll(%d) gpll(%d)\n", __func__, apllb, aplll, dpll, cpll, gpll); } -#endif
#if !IS_ENABLED(CONFIG_SPL_BUILD) || CONFIG_IS_ENABLED(MMC_SUPPORT) static ulong rk3368_mmc_get_clk(struct rk3368_cru *cru, uint clk_id) @@ -473,9 +468,8 @@ static int rk3368_clk_probe(struct udevice *dev)
priv->cru = map_sysmem(plat->dtd.reg[1], plat->dtd.reg[3]);#endif -#if IS_ENABLED(CONFIG_SPL_BUILD) || IS_ENABLED(CONFIG_TPL_BUILD)
- rkclk_init(priv->cru);
-#endif
return 0;}
2.7.4