2022-04-16 02:13:05

by Georgi Vlaev

Subject: [PATCH 0/2] clk: keystone: Add support for AM62 specific ewpm-tbclk

This patch series adds support for TI's AM62 specific time-based
submodule clock (tbclk). On AM62 SoCs we have to provide 3 tbclk
instances, as the SoC features 3 EPWM modules.

Georgi Vlaev (2):
clk: keystone: syscon-clk: Add support for AM62 epwm-tbclk
dt-bindings: clock: ehrpwm: Add AM62 specific compatible

.../bindings/clock/ti,am654-ehrpwm-tbclk.yaml | 1 +
drivers/clk/keystone/syscon-clk.c | 11 +++++++++++
2 files changed, 12 insertions(+)


base-commit: ce522ba9ef7e2d9fb22a39eb3371c0c64e2a433e
--
2.30.2

2022-04-16 02:24:59

by Georgi Vlaev

Subject: [PATCH 1/2] 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 <[email protected]>
Tested-by: Vignesh Raghavendra <[email protected]>
---
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