diff options
| author | Sowjanya Komatineni <skomatineni@nvidia.com> | 2019-08-16 22:41:54 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2019-11-11 16:53:03 +0300 |
| commit | 68a14a5634dacb37d18618d62f0410f1ec69ab28 (patch) | |
| tree | 2b61253f1544ba705f9830832540e212045b1e6e /drivers/clk/tegra/clk.c | |
| parent | 2b8cfd6b52cbf951d9b90862d95b8473d34d02ee (diff) | |
| download | linux-68a14a5634dacb37d18618d62f0410f1ec69ab28.tar.xz | |
clk: tegra: clk-super: Fix to enable PLLP branches to CPU
This patch has a fix to enable PLLP branches to CPU before changing
the CPU cluster clock source to PLLP for Gen5 Super clock and
disables PLLP branches to CPU when not in use.
During system suspend entry and exit, CPU source will be switched
to PLLP and this needs PLLP branches to be enabled to CPU prior to
the switch.
On system resume, warmboot code enables PLLP branches to CPU and
powers up the CPU with PLLP clock source.
Acked-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/clk/tegra/clk.c')
| -rw-r--r-- | drivers/clk/tegra/clk.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/clk/tegra/clk.c b/drivers/clk/tegra/clk.c index 573e3c967ae1..eb08047fd02f 100644 --- a/drivers/clk/tegra/clk.c +++ b/drivers/clk/tegra/clk.c @@ -23,6 +23,7 @@ #define CLK_OUT_ENB_W 0x364 #define CLK_OUT_ENB_X 0x280 #define CLK_OUT_ENB_Y 0x298 +#define CLK_ENB_PLLP_OUT_CPU BIT(31) #define CLK_OUT_ENB_SET_L 0x320 #define CLK_OUT_ENB_CLR_L 0x324 #define CLK_OUT_ENB_SET_H 0x328 @@ -199,6 +200,19 @@ const struct tegra_clk_periph_regs *get_reg_bank(int clkid) } } +void tegra_clk_set_pllp_out_cpu(bool enable) +{ + u32 val; + + val = readl_relaxed(clk_base + CLK_OUT_ENB_Y); + if (enable) + val |= CLK_ENB_PLLP_OUT_CPU; + else + val &= ~CLK_ENB_PLLP_OUT_CPU; + + writel_relaxed(val, clk_base + CLK_OUT_ENB_Y); +} + struct clk ** __init tegra_clk_init(void __iomem *regs, int num, int banks) { clk_base = regs; |