linux-kernel - [PATCH v2 2/2] clk: keystone: syscon-clk: Add support for AM62 epwm-tbclk

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Date:   Fri, 15 Apr 2022 22:03:43 +0300
From:   Georgi Vlaev <g-vlaev@...com>
To:     <ssantosh@...nel.org>, <mturquette@...libre.com>,
        <sboyd@...nel.org>, <robh+dt@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <nm@...com>, <vigneshr@...com>,
        Georgi Vlaev <g-vlaev@...com>
Subject: [PATCH v2 2/2] clk: keystone: syscon-clk: Add support for AM62 epwm-tbclk

AM62 has 3 instances of EPWM modules. Each EPWM module has
an EPWM TBCLKEN module input used to individually enable or
disable its EPWM time-base clock. The EPWM time-base clock
enable input comes from the CTRLMMR_EPWM_TB_CLKEN register
bits 0 to 2 in CTRL_MMR0 module (6.1.1.4.1.48 [1]). This
is virtually the same setup as in AM64 but with 3 instead
of 9 clock providers on AM62.

Update the driver with the 3 instances of clocks associated
to a new compatible: "ti,am62-epwm-tbclk".

[1] https://www.ti.com/lit/pdf/spruiv7

Signed-off-by: Georgi Vlaev <g-vlaev@...com>
Tested-by: Vignesh Raghavendra <vigneshr@...com>
---
 drivers/clk/keystone/syscon-clk.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/clk/keystone/syscon-clk.c b/drivers/clk/keystone/syscon-clk.c
index aae1a4076281..19198325b909 100644
--- a/drivers/clk/keystone/syscon-clk.c
+++ b/drivers/clk/keystone/syscon-clk.c
@@ -162,6 +162,13 @@ static const struct ti_syscon_gate_clk_data am64_clk_data[] = {
 	{ /* Sentinel */ },
 };
 
+static const struct ti_syscon_gate_clk_data am62_clk_data[] = {
+	TI_SYSCON_CLK_GATE("epwm_tbclk0", 0x0, 0),
+	TI_SYSCON_CLK_GATE("epwm_tbclk1", 0x0, 1),
+	TI_SYSCON_CLK_GATE("epwm_tbclk2", 0x0, 2),
+	{ /* Sentinel */ },
+};
+
 static const struct of_device_id ti_syscon_gate_clk_ids[] = {
 	{
 		.compatible = "ti,am654-ehrpwm-tbclk",
@@ -171,6 +178,10 @@ static const struct of_device_id ti_syscon_gate_clk_ids[] = {
 		.compatible = "ti,am64-epwm-tbclk",
 		.data = &am64_clk_data,
 	},
+	{
+		.compatible = "ti,am62-epwm-tbclk",
+		.data = &am62_clk_data,
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ti_syscon_gate_clk_ids);
-- 
2.30.2