diff options
| author | Rahul Tanwar <rtanwar@maxlinear.com> | 2022-10-13 08:48:32 +0200 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2022-10-18 00:27:36 +0200 |
| commit | a5d49bd369b8588c0ee9d4d0a2c0160558a3ab69 (patch) | |
| tree | a7d419b70eecf889090c66760dc4b29616435f89 /drivers/clk/x86 | |
| parent | clk: mxl: Remove redundant spinlocks (diff) | |
| download | linux-a5d49bd369b8588c0ee9d4d0a2c0160558a3ab69.tar.xz linux-a5d49bd369b8588c0ee9d4d0a2c0160558a3ab69.zip | |
clk: mxl: Add option to override gate clks
In MxL's LGM SoC, gate clocks can be controlled either from CGU clk driver
i.e. this driver or directly from power management driver/daemon. It is
dependent on the power policy/profile requirements of the end product.
To support such use cases, provide option to override gate clks enable/disable
by adding a flag GATE_CLK_HW which controls if these gate clks are controlled
by HW i.e. this driver or overridden in order to allow it to be controlled
by power profiles instead.
Reviewed-by: Yi xin Zhu <yzhu@maxlinear.com>
Signed-off-by: Rahul Tanwar <rtanwar@maxlinear.com>
Link: https://lore.kernel.org/r/bdc9c89317b5d338a6c4f1d49386b696e947a672.1665642720.git.rtanwar@maxlinear.com
[sboyd@kernel.org: Add braces on many line if-else]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers/clk/x86')
| -rw-r--r-- | drivers/clk/x86/clk-cgu.c | 16 | ||||
| -rw-r--r-- | drivers/clk/x86/clk-cgu.h | 1 |
2 files changed, 16 insertions, 1 deletions
diff --git a/drivers/clk/x86/clk-cgu.c b/drivers/clk/x86/clk-cgu.c index 1f7e93de67bc..4278a687076c 100644 --- a/drivers/clk/x86/clk-cgu.c +++ b/drivers/clk/x86/clk-cgu.c @@ -354,8 +354,22 @@ int lgm_clk_register_branches(struct lgm_clk_provider *ctx, hw = lgm_clk_register_fixed_factor(ctx, list); break; case CLK_TYPE_GATE: - hw = lgm_clk_register_gate(ctx, list); + if (list->gate_flags & GATE_CLK_HW) { + hw = lgm_clk_register_gate(ctx, list); + } else { + /* + * GATE_CLKs can be controlled either from + * CGU clk driver i.e. this driver or directly + * from power management driver/daemon. It is + * dependent on the power policy/profile requirements + * of the end product. To override control of gate + * clks from this driver, provide NULL for this index + * of gate clk provider. + */ + hw = NULL; + } break; + default: dev_err(ctx->dev, "invalid clk type\n"); return -EINVAL; diff --git a/drivers/clk/x86/clk-cgu.h b/drivers/clk/x86/clk-cgu.h index 0aa0f35d63a0..73ce84345f81 100644 --- a/drivers/clk/x86/clk-cgu.h +++ b/drivers/clk/x86/clk-cgu.h @@ -197,6 +197,7 @@ struct lgm_clk_branch { /* clock flags definition */ #define CLOCK_FLAG_VAL_INIT BIT(16) #define MUX_CLK_SW BIT(17) +#define GATE_CLK_HW BIT(18) #define LGM_MUX(_id, _name, _pdata, _f, _reg, \ _shift, _width, _cf, _v) \ |