[PATCH 1/3] clk: renesas: r9a08g046: Add clock and reset entries for the RSCI

From: Biju

Date: Tue May 05 2026 - 03:18:46 EST

From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>

Add clock and reset entries for the Serial Communications Interface (RSCI)
found on the RZ/G3L SoC. This includes various dividers and mux clocks
needed for the four RSCI channels.

Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
drivers/clk/renesas/r9a08g046-cpg.c | 71 +++++++++++++++++++++++++++++
1 file changed, 71 insertions(+)

diff --git a/drivers/clk/renesas/r9a08g046-cpg.c b/drivers/clk/renesas/r9a08g046-cpg.c
index 0657dc01ff8a..3a04db4196a6 100644
--- a/drivers/clk/renesas/r9a08g046-cpg.c
+++ b/drivers/clk/renesas/r9a08g046-cpg.c
@@ -18,8 +18,10 @@
#define G3L_CPG_PL2_DDIV (0x204)
#define G3L_CPG_PL3_DDIV (0x208)
#define G3L_CPG_CA55CORE_DDIV (0x234)
+#define G3L_CPG_RSCI_DDIV (0x238)
#define G3L_CLKDIVSTATUS (0x280)
#define G3L_CPG_ETH_SSEL (0x410)
+#define G3L_CPG_RSCI_SSEL (0x414)
#define G3L_CPG_ETH_SDIV (0x434)

/* RZ/G3L Specific division configuration. */
@@ -30,6 +32,10 @@
#define G3L_DIV_CA55_CORE1 DDIV_PACK(G3L_CPG_CA55CORE_DDIV, 4, 3)
#define G3L_DIV_CA55_CORE2 DDIV_PACK(G3L_CPG_CA55CORE_DDIV, 8, 3)
#define G3L_DIV_CA55_CORE3 DDIV_PACK(G3L_CPG_CA55CORE_DDIV, 12, 3)
+#define G3L_DIV_RSCI0 DDIV_PACK(G3L_CPG_RSCI_DDIV, 0, 2)
+#define G3L_DIV_RSCI1 DDIV_PACK(G3L_CPG_RSCI_DDIV, 2, 2)
+#define G3L_DIV_RSCI2 DDIV_PACK(G3L_CPG_RSCI_DDIV, 4, 2)
+#define G3L_DIV_RSCI3 DDIV_PACK(G3L_CPG_RSCI_DDIV, 6, 2)
#define G3L_SDIV_ETH_A DDIV_PACK(G3L_CPG_ETH_SDIV, 0, 2)
#define G3L_SDIV_ETH_B DDIV_PACK(G3L_CPG_ETH_SDIV, 4, 1)
#define G3L_SDIV_ETH_C DDIV_PACK(G3L_CPG_ETH_SDIV, 8, 2)
@@ -43,6 +49,10 @@
#define G3L_DIV_CA55_CORE1_STS DDIV_PACK(G3L_CLKDIVSTATUS, 13, 1)
#define G3L_DIV_CA55_CORE2_STS DDIV_PACK(G3L_CLKDIVSTATUS, 14, 1)
#define G3L_DIV_CA55_CORE3_STS DDIV_PACK(G3L_CLKDIVSTATUS, 15, 1)
+#define G3L_DIV_RSCI0_STS DDIV_PACK(G3L_CLKDIVSTATUS, 16, 1)
+#define G3L_DIV_RSCI1_STS DDIV_PACK(G3L_CLKDIVSTATUS, 17, 1)
+#define G3L_DIV_RSCI2_STS DDIV_PACK(G3L_CLKDIVSTATUS, 18, 1)
+#define G3L_DIV_RSCI3_STS DDIV_PACK(G3L_CLKDIVSTATUS, 19, 1)

/* RZ/G3L Specific clocks select. */
#define G3L_SEL_ETH0_TX SEL_PLL_PACK(G3L_CPG_ETH_SSEL, 0, 1)
@@ -55,6 +65,10 @@
#define G3L_SEL_ETH1_RM SEL_PLL_PACK(G3L_CPG_ETH_SSEL, 10, 1)
#define G3L_SEL_ETH1_CLK_TX_I SEL_PLL_PACK(G3L_CPG_ETH_SSEL, 11, 1)
#define G3L_SEL_ETH1_CLK_RX_I SEL_PLL_PACK(G3L_CPG_ETH_SSEL, 12, 1)
+#define G3L_SEL_RSCI0 SEL_PLL_PACK(G3L_CPG_RSCI_SSEL, 0, 2)
+#define G3L_SEL_RSCI1 SEL_PLL_PACK(G3L_CPG_RSCI_SSEL, 2, 2)
+#define G3L_SEL_RSCI2 SEL_PLL_PACK(G3L_CPG_RSCI_SSEL, 4, 2)
+#define G3L_SEL_RSCI3 SEL_PLL_PACK(G3L_CPG_RSCI_SSEL, 6, 2)

enum clk_ids {
/* Core Clock Outputs exported to DT */
@@ -71,6 +85,10 @@ enum clk_ids {
CLK_PLL1,
CLK_PLL2,
CLK_PLL2_DIV2,
+ CLK_PLL2_DIV2_4,
+ CLK_PLL2_DIV5,
+ CLK_PLL2_DIV6,
+ CLK_PLL2_DIV7,
CLK_PLL3,
CLK_PLL3_DIV2,
CLK_PLL6,
@@ -81,6 +99,10 @@ enum clk_ids {
CLK_SEL_ETH1_TX,
CLK_SEL_ETH1_RX,
CLK_SEL_ETH1_RM,
+ CLK_SEL_RSCI0,
+ CLK_SEL_RSCI1,
+ CLK_SEL_RSCI2,
+ CLK_SEL_RSCI3,
CLK_ETH0_TR,
CLK_ETH0_RM,
CLK_ETH1_TR,
@@ -107,6 +129,14 @@ static const struct clk_div_table dtable_2_20[] = {
{ 0, 0 },
};

+static const struct clk_div_table dtable_2_16[] = {
+ { 0, 2 },
+ { 1, 4 },
+ { 2, 8 },
+ { 3, 16 },
+ { 0, 0 },
+};
+
static const struct clk_div_table dtable_4_128[] = {
{ 0, 4 },
{ 1, 8 },
@@ -137,6 +167,7 @@ static const char * const sel_eth0_rm[] = { ".pll6_div10", "eth0_rxc_rx_clk" };
static const char * const sel_eth1_tx[] = { ".div_eth1_tr", "eth1_txc_tx_clk" };
static const char * const sel_eth1_rx[] = { ".div_eth1_tr", "eth1_rxc_rx_clk" };
static const char * const sel_eth1_rm[] = { ".pll6_div10", "eth1_rxc_rx_clk" };
+static const char * const sel_rsci[] = { ".pll2_div5", ".pll2_div6", ".pll2_div7", ".pll2_div2_4" };
static const char * const sel_eth0_clk_tx_i[] = { ".sel_eth0_tx", ".div_eth0_rm" };
static const char * const sel_eth0_clk_rx_i[] = { ".sel_eth0_rx", ".div_eth0_rm" };
static const char * const sel_eth1_clk_tx_i[] = { ".sel_eth1_tx", ".div_eth1_rm" };
@@ -158,8 +189,16 @@ static const struct cpg_core_clk r9a08g046_core_clks[] __initconst = {
DEF_G3L_PLL(".pll6", CLK_PLL6, CLK_EXTAL, CPG_PLL_CONF(0x50, 0),
500000000UL),
DEF_FIXED(".pll2_div2", CLK_PLL2_DIV2, CLK_PLL2, 1, 2),
+ DEF_FIXED(".pll2_div2_4", CLK_PLL2_DIV2_4, CLK_PLL2_DIV2, 1, 4),
+ DEF_FIXED(".pll2_div5", CLK_PLL2_DIV5, CLK_PLL2, 1, 5),
+ DEF_FIXED(".pll2_div6", CLK_PLL2_DIV6, CLK_PLL2, 1, 6),
+ DEF_FIXED(".pll2_div7", CLK_PLL2_DIV7, CLK_PLL2, 1, 7),
DEF_FIXED(".pll3_div2", CLK_PLL3_DIV2, CLK_PLL3, 1, 2),
DEF_FIXED(".pll6_div10", CLK_PLL6_DIV10, CLK_PLL6, 1, 10),
+ DEF_MUX(".sel_rsci0", CLK_SEL_RSCI0, G3L_SEL_RSCI0, sel_rsci),
+ DEF_MUX(".sel_rsci1", CLK_SEL_RSCI1, G3L_SEL_RSCI1, sel_rsci),
+ DEF_MUX(".sel_rsci2", CLK_SEL_RSCI2, G3L_SEL_RSCI2, sel_rsci),
+ DEF_MUX(".sel_rsci3", CLK_SEL_RSCI3, G3L_SEL_RSCI3, sel_rsci),
DEF_MUX(".sel_eth0_tx", CLK_SEL_ETH0_TX, G3L_SEL_ETH0_TX, sel_eth0_tx),
DEF_MUX(".sel_eth0_rx", CLK_SEL_ETH0_RX, G3L_SEL_ETH0_RX, sel_eth0_rx),
DEF_MUX(".sel_eth0_rm", CLK_SEL_ETH0_RM, G3L_SEL_ETH0_RM, sel_eth0_rm),
@@ -186,6 +225,14 @@ static const struct cpg_core_clk r9a08g046_core_clks[] __initconst = {
dtable_4_128, 0, 0, 0, NULL),
DEF_G3S_DIV("P3", R9A08G046_CLK_P3, CLK_PLL2_DIV2, G3L_DIVPL2A, G3L_DIVPL2A_STS,
dtable_4_128, 0, 0, 0, NULL),
+ DEF_G3S_DIV("P13", R9A08G046_CLK_P13, CLK_SEL_RSCI0, G3L_DIV_RSCI0, G3L_DIV_RSCI0_STS,
+ dtable_2_16, 0, 100000000UL, 0, NULL),
+ DEF_G3S_DIV("P14", R9A08G046_CLK_P14, CLK_SEL_RSCI1, G3L_DIV_RSCI1, G3L_DIV_RSCI1_STS,
+ dtable_2_16, 0, 100000000UL, 0, NULL),
+ DEF_G3S_DIV("P15", R9A08G046_CLK_P15, CLK_SEL_RSCI2, G3L_DIV_RSCI2, G3L_DIV_RSCI2_STS,
+ dtable_2_16, 0, 100000000UL, 0, NULL),
+ DEF_G3S_DIV("P16", R9A08G046_CLK_P16, CLK_SEL_RSCI3, G3L_DIV_RSCI3, G3L_DIV_RSCI3_STS,
+ dtable_2_16, 0, 100000000UL, 0, NULL),
DEF_FIXED("HP", R9A08G046_CLK_HP, CLK_PLL6_DIV10, 1, 1),
DEF_MUX_FLAGS("ETHTX01", R9A08G046_CLK_ETHTX01, G3L_SEL_ETH0_CLK_TX_I, sel_eth0_clk_tx_i,
CLK_SET_RATE_PARENT),
@@ -281,6 +328,22 @@ static const struct rzg2l_mod_clk r9a08g046_mod_clks[] = {
MSTOP(BUS_MCPU3, BIT(4))),
DEF_MOD("gpio_hclk", R9A08G046_GPIO_HCLK, R9A08G046_OSCCLK, 0x598, 0,
MSTOP(BUS_PERI_CPU, BIT(6))),
+ DEF_MOD("rsci0_pclk", R9A08G046_RSCI0_PCLK, R9A08G046_CLK_P0, 0x618, 0,
+ MSTOP(BUS_MCPU2, BIT(7))),
+ DEF_MOD("rsci1_pclk", R9A08G046_RSCI1_PCLK, R9A08G046_CLK_P0, 0x618, 1,
+ MSTOP(BUS_MCPU2, BIT(8))),
+ DEF_MOD("rsci2_pclk", R9A08G046_RSCI2_PCLK, R9A08G046_CLK_P0, 0x618, 2,
+ MSTOP(BUS_MCPU3, BIT(11))),
+ DEF_MOD("rsci3_pclk", R9A08G046_RSCI3_PCLK, R9A08G046_CLK_P0, 0x618, 3,
+ MSTOP(BUS_MCPU3, BIT(12))),
+ DEF_MOD("rsci0_tclk", R9A08G046_RSCI0_TCLK, R9A08G046_CLK_P13, 0x618, 8,
+ MSTOP(BUS_MCPU2, BIT(7))),
+ DEF_MOD("rsci1_tclk", R9A08G046_RSCI1_TCLK, R9A08G046_CLK_P14, 0x618, 9,
+ MSTOP(BUS_MCPU2, BIT(8))),
+ DEF_MOD("rsci2_tclk", R9A08G046_RSCI2_TCLK, R9A08G046_CLK_P15, 0x618, 10,
+ MSTOP(BUS_MCPU3, BIT(11))),
+ DEF_MOD("rsci3_tclk", R9A08G046_RSCI3_TCLK, R9A08G046_CLK_P16, 0x618, 11,
+ MSTOP(BUS_MCPU3, BIT(12))),
};

static const struct rzg2l_reset r9a08g046_resets[] = {
@@ -305,6 +368,14 @@ static const struct rzg2l_reset r9a08g046_resets[] = {
DEF_RST(R9A08G046_GPIO_RSTN, 0x898, 0),
DEF_RST(R9A08G046_GPIO_PORT_RESETN, 0x898, 1),
DEF_RST(R9A08G046_GPIO_SPARE_RESETN, 0x898, 2),
+ DEF_RST(R9A08G046_RSCI0_PRESETN, 0x918, 0),
+ DEF_RST(R9A08G046_RSCI1_PRESETN, 0x918, 1),
+ DEF_RST(R9A08G046_RSCI2_PRESETN, 0x918, 2),
+ DEF_RST(R9A08G046_RSCI3_PRESETN, 0x918, 3),
+ DEF_RST(R9A08G046_RSCI0_TRESETN, 0x918, 8),
+ DEF_RST(R9A08G046_RSCI1_TRESETN, 0x918, 9),
+ DEF_RST(R9A08G046_RSCI2_TRESETN, 0x918, 10),
+ DEF_RST(R9A08G046_RSCI3_TRESETN, 0x918, 11),
};

static const unsigned int r9a08g046_crit_mod_clks[] __initconst = {
--
2.43.0