From 87af9481af53c041358be0c46adb103c62218b7f Mon Sep 17 00:00:00 2001 From: Cristian Marussi Date: Mon, 15 Apr 2024 17:36:49 +0100 Subject: clk: scmi: Add support for get/set duty_cycle operations Provide the CLK framework callbacks related to get/set clock duty cycle if the related SCMI clock supports OEM extended configurations. CC: Michael Turquette CC: Stephen Boyd CC: linux-clk@vger.kernel.org Signed-off-by: Cristian Marussi Link: https://lore.kernel.org/r/20240415163649.895268-6-cristian.marussi@arm.com Reviewed-by: Sudeep Holla Signed-off-by: Stephen Boyd --- drivers/clk/clk-scmi.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) (limited to 'drivers/clk/clk-scmi.c') diff --git a/drivers/clk/clk-scmi.c b/drivers/clk/clk-scmi.c index ce0f26ee632f..d86a02563f6c 100644 --- a/drivers/clk/clk-scmi.c +++ b/drivers/clk/clk-scmi.c @@ -22,6 +22,7 @@ enum scmi_clk_feats { SCMI_CLK_STATE_CTRL_SUPPORTED, SCMI_CLK_RATE_CTRL_SUPPORTED, SCMI_CLK_PARENT_CTRL_SUPPORTED, + SCMI_CLK_DUTY_CYCLE_SUPPORTED, SCMI_CLK_FEATS_COUNT }; @@ -169,6 +170,45 @@ static int scmi_clk_atomic_is_enabled(struct clk_hw *hw) return !!enabled; } +static int scmi_clk_get_duty_cycle(struct clk_hw *hw, struct clk_duty *duty) +{ + int ret; + u32 val; + struct scmi_clk *clk = to_scmi_clk(hw); + + ret = scmi_proto_clk_ops->config_oem_get(clk->ph, clk->id, + SCMI_CLOCK_CFG_DUTY_CYCLE, + &val, NULL, false); + if (!ret) { + duty->num = val; + duty->den = 100; + } else { + dev_warn(clk->dev, + "Failed to get duty cycle for clock ID %d\n", clk->id); + } + + return ret; +} + +static int scmi_clk_set_duty_cycle(struct clk_hw *hw, struct clk_duty *duty) +{ + int ret; + u32 val; + struct scmi_clk *clk = to_scmi_clk(hw); + + /* SCMI OEM Duty Cycle is expressed as a percentage */ + val = (duty->num * 100) / duty->den; + ret = scmi_proto_clk_ops->config_oem_set(clk->ph, clk->id, + SCMI_CLOCK_CFG_DUTY_CYCLE, + val, false); + if (ret) + dev_warn(clk->dev, + "Failed to set duty cycle(%u/%u) for clock ID %d\n", + duty->num, duty->den, clk->id); + + return ret; +} + static int scmi_clk_ops_init(struct device *dev, struct scmi_clk *sclk, const struct clk_ops *scmi_ops) { @@ -258,6 +298,12 @@ scmi_clk_ops_alloc(struct device *dev, unsigned long feats_key) if (feats_key & BIT(SCMI_CLK_PARENT_CTRL_SUPPORTED)) ops->set_parent = scmi_clk_set_parent; + /* Duty cycle */ + if (feats_key & BIT(SCMI_CLK_DUTY_CYCLE_SUPPORTED)) { + ops->get_duty_cycle = scmi_clk_get_duty_cycle; + ops->set_duty_cycle = scmi_clk_set_duty_cycle; + } + return ops; } @@ -312,6 +358,9 @@ scmi_clk_ops_select(struct scmi_clk *sclk, bool atomic_capable, if (!ci->parent_ctrl_forbidden) feats_key |= BIT(SCMI_CLK_PARENT_CTRL_SUPPORTED); + if (ci->extended_config) + feats_key |= BIT(SCMI_CLK_DUTY_CYCLE_SUPPORTED); + if (WARN_ON(feats_key >= db_size)) return NULL; -- cgit v1.2.3