Thierry,
-----Original Message----- From: Thierry Reding [mailto:thierry.reding@gmail.com] Sent: Monday, September 23, 2013 1:08 PM To: Tom Warren Cc: u-boot@lists.denx.de Subject: [PATCH v2 2/2] Tegra114: Do not program CPCON field for PLLX
PLLX no longer has the CPCON field on Tegra114, so do not attempt to program it.
Signed-off-by: Thierry Reding treding@nvidia.com
Changes in v2:
- new patch
arch/arm/cpu/arm720t/tegra-common/cpu.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/arm/cpu/arm720t/tegra-common/cpu.c b/arch/arm/cpu/arm720t/tegra-common/cpu.c index aa1e04f..5ab2ebf 100644 --- a/arch/arm/cpu/arm720t/tegra-common/cpu.c +++ b/arch/arm/cpu/arm720t/tegra-common/cpu.c @@ -135,6 +135,7 @@ void adjust_pllp_out_freqs(void) int pllx_set_rate(struct clk_pll_simple *pll , u32 divn, u32 divm, u32 divp, u32 cpcon) {
int chip = tegra_get_chip(); u32 reg;
/* If PLLX is already enabled, just return */ @@ -151,7 +152,8 @@ int
pllx_set_rate(struct clk_pll_simple *pll , u32 divn, u32 divm, writel(reg, &pll->pll_base);
/* Set cpcon to PLLX_MISC */
- reg = (cpcon << PLL_CPCON_SHIFT);
- if (chip == CHIPID_TEGRA20 || chip == CHIPID_TEGRA30)
reg = (cpcon << PLL_CPCON_SHIFT);
If it's not a T20/T30, reg is still set to the PLLX_BASE setting from above. It'll then be written to PLLX_MISC w/bad bits below. You need to set a default, or read pllx_misc first.
/* Set dccon to PLLX_MISC if freq > 600MHz */ if (divn > 600) -- 1.8.4
-- Nvpublic