[PATCH v6 03/21] clk: renesas: r9a09g047: Add CLK_PLLDSI{0,1} clocks

Tommaso Merciai
2026-04-08T10:38:17Z

Add support for the PLLDSI{0,1} clocks in the r9a09g047 CPG driver.

Introduce CLK_PLLDSI{0,1} also, introduce the
rzg3e_cpg_pll_dsi{0,1}_limits structures to describe the frequency
constraints specific to the RZ/G3E SoC.

On Renesas RZ/G3E:

- PLLDSI0 maximum output frequency: 1218 MHz
- PLLDSI1 maximum output frequency: 609 MHz

These limits are enforced through the newly added
RZG3E_CPG_PLL_DSI{0,1}_LIMITS().

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
---
v5->v6:
- No chages.

v4->v5:
- No chages.

v3->v4:
- No changes.

v2->v3:
- No changes.

v1->v2:
- Collected GUytterhoeven tag.

drivers/clk/renesas/r9a09g047-cpg.c | 11 +++++++++++
include/linux/clk/renesas.h | 20 ++++++++++++++++++++
2 files changed, 31 insertions(+)

diff --git a/drivers/clk/renesas/r9a09g047-cpg.c b/drivers/clk/renesas/r9a09g047-cpg.c
index 41464a6e9b5d..87d5924f7e79 100644
--- a/drivers/clk/renesas/r9a09g047-cpg.c
+++ b/drivers/clk/renesas/r9a09g047-cpg.c
@@ -6,6 +6,7 @@
*/

#include <linux/clk-provider.h>
+#include <linux/clk/renesas.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/kernel.h>
@@ -30,6 +31,8 @@ enum clk_ids {
CLK_PLLCA55,
CLK_PLLVDO,
CLK_PLLETH,
+ CLK_PLLDSI0,
+ CLK_PLLDSI1,

/* Internal Core Clocks */
CLK_PLLCM33_DIV3,
@@ -117,6 +120,12 @@ static const struct clk_div_table dtable_16_128[] = {
{0, 0},
};

+RZG3E_CPG_PLL_DSI0_LIMITS(rzg3e_cpg_pll_dsi0_limits);
+RZG3E_CPG_PLL_DSI1_LIMITS(rzg3e_cpg_pll_dsi1_limits);
+
+#define PLLDSI0 PLL_PACK_LIMITS(0xc0, 1, 0, &rzg3e_cpg_pll_dsi0_limits)
+#define PLLDSI1 PLL_PACK_LIMITS(0x160, 1, 1, &rzg3e_cpg_pll_dsi1_limits)
+
/* Mux clock tables */
static const char * const smux2_gbe0_rxclk[] = { ".plleth_gbe0", "et0_rxclk" };
static const char * const smux2_gbe0_txclk[] = { ".plleth_gbe0", "et0_txclk" };
@@ -138,6 +147,8 @@ static const struct cpg_core_clk r9a09g047_core_clks[] __initconst = {
DEF_PLL(".pllca55", CLK_PLLCA55, CLK_QEXTAL, PLLCA55),
DEF_FIXED(".plleth", CLK_PLLETH, CLK_QEXTAL, 125, 3),
DEF_FIXED(".pllvdo", CLK_PLLVDO, CLK_QEXTAL, 105, 2),
+ DEF_PLLDSI(".plldsi0", CLK_PLLDSI0, CLK_QEXTAL, PLLDSI0),
+ DEF_PLLDSI(".plldsi1", CLK_PLLDSI1, CLK_QEXTAL, PLLDSI1),

/* Internal Core Clocks */
DEF_FIXED(".pllcm33_div3", CLK_PLLCM33_DIV3, CLK_PLLCM33, 1, 3),
diff --git a/include/linux/clk/renesas.h b/include/linux/clk/renesas.h
index c360df9fa735..0949400f44de 100644
--- a/include/linux/clk/renesas.h
+++ b/include/linux/clk/renesas.h
@@ -164,6 +164,26 @@ struct rzv2h_pll_div_pars {
.k = { .min = -32768, .max = 32767 }, \
} \

+#define RZG3E_CPG_PLL_DSI0_LIMITS(name) \
+ static const struct rzv2h_pll_limits (name) = { \
+ .fout = { .min = 25 * MEGA, .max = 1218 * MEGA }, \
+ .fvco = { .min = 1600 * MEGA, .max = 3200 * MEGA }, \
+ .m = { .min = 64, .max = 533 }, \
+ .p = { .min = 1, .max = 4 }, \
+ .s = { .min = 0, .max = 6 }, \
+ .k = { .min = -32768, .max = 32767 }, \
+ } \
+
+#define RZG3E_CPG_PLL_DSI1_LIMITS(name) \
+ static const struct rzv2h_pll_limits (name) = { \
+ .fout = { .min = 25 * MEGA, .max = 609 * MEGA }, \
+ .fvco = { .min = 1600 * MEGA, .max = 3200 * MEGA }, \
+ .m = { .min = 64, .max = 533 }, \
+ .p = { .min = 1, .max = 4 }, \
+ .s = { .min = 0, .max = 6 }, \
+ .k = { .min = -32768, .max = 32767 }, \
+ } \
+
#ifdef CONFIG_CLK_RZV2H
bool rzv2h_get_pll_pars(const struct rzv2h_pll_limits *limits,
struct rzv2h_pll_pars *pars, u64 freq_millihz);
--
2.43.0