Messages in this thread Patch in this message | | | From | Rahul Tanwar <> | Subject | [PATCH v4 3/4] clk: mxl: Add option to override gate clks | Date | Thu, 13 Oct 2022 14:48:32 +0800 |
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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> --- drivers/clk/x86/clk-cgu.c | 15 ++++++++++++++- drivers/clk/x86/clk-cgu.h | 1 + 2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/x86/clk-cgu.c b/drivers/clk/x86/clk-cgu.c index 1f7e93de67bc..5eafd7e0d945 100644 --- a/drivers/clk/x86/clk-cgu.c +++ b/drivers/clk/x86/clk-cgu.c @@ -354,8 +354,21 @@ 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) \ -- 2.17.1
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