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serial: sh-sci: Add support for RZ/G3E RSCI clks

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RZ/G3E RSCI has 6 clocks (5 module clocks + 1 external clock). Add
support for the module clocks.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/20251129164325.209213-14-biju.das.jz@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Biju Das 2025-11-29 16:43:09 +00:00 • committed by Greg Kroah-Hartman
parent 4cb2bd1bf4
commit 83c405ec3a
2 changed files with 13 additions and 0 deletions
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3
drivers/tty/serial/sh-sci-common.h
View file

@ -16,6 +16,9 @@ enum SCI_CLKS {
SCI_SCK, /* Optional External Clock */
SCI_BRG_INT, /* Optional BRG Internal Clock Source */
SCI_SCIF_CLK, /* Optional BRG External Clock Source */
SCI_FCK_DIV4, /* Optional Functional Clock frequency-divided by 4 */
SCI_FCK_DIV16, /* Optional Functional Clock frequency-divided by 16 */
SCI_FCK_DIV64, /* Optional Functional Clock frequency-divided by 64 */
SCI_NUM_CLKS
};

10
drivers/tty/serial/sh-sci.c
View file

@ -3172,6 +3172,9 @@ static int sci_init_clocks(struct sci_port *sci_port, struct device *dev)
[SCI_SCK] = "sck",
[SCI_BRG_INT] = "brg_int",
[SCI_SCIF_CLK] = "scif_clk",
[SCI_FCK_DIV4] = "tclk_div4",
[SCI_FCK_DIV16] = "tclk_div16",
[SCI_FCK_DIV64] = "tclk_div64",
};
struct clk *clk;
unsigned int i;
@ -3181,6 +3184,9 @@ static int sci_init_clocks(struct sci_port *sci_port, struct device *dev)
} else if (sci_port->type == RSCI_PORT_SCIF16) {
clk_names[SCI_FCK] = "operation";
clk_names[SCI_BRG_INT] = "bus";
} else if (sci_port->type == RSCI_PORT_SCIF32) {
clk_names[SCI_FCK] = "tclk";
clk_names[SCI_BRG_INT] = "pclk";
}
for (i = 0; i < SCI_NUM_CLKS; i++) {
@ -3194,6 +3200,10 @@ static int sci_init_clocks(struct sci_port *sci_port, struct device *dev)
(i == SCI_FCK || i == SCI_BRG_INT))
return dev_err_probe(dev, -ENODEV, "failed to get %s\n", name);
if (!clk && sci_port->type == RSCI_PORT_SCIF32 &&
(i != SCI_SCK && i != SCI_SCIF_CLK))
return dev_err_probe(dev, -ENODEV, "failed to get %s\n", name);
if (!clk && i == SCI_FCK) {
/*
* Not all SH platforms declare a clock lookup entry