linux-kernel - [PATCH v3 5/7] clk: meson: a1: peripherals: support 'sys_pll

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Date: Wed, 15 May 2024 21:47:28 +0300
From: Dmitry Rokosov <ddrokosov@...utedevices.com>
To: <neil.armstrong@...aro.org>, <jbrunet@...libre.com>,
	<mturquette@...libre.com>, <sboyd@...nel.org>, <robh+dt@...nel.org>,
	<krzysztof.kozlowski+dt@...aro.org>, <khilman@...libre.com>,
	<martin.blumenstingl@...glemail.com>
CC: <jian.hu@...ogic.com>, <kernel@...rdevices.ru>, <rockosov@...il.com>,
	<linux-amlogic@...ts.infradead.org>, <linux-clk@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, Dmitry Rokosov
	<ddrokosov@...utedevices.com>
Subject: [PATCH v3 5/7] clk: meson: a1: peripherals: support 'sys_pll_div16' clock as GEN input

The clock 'sys_pll_div16' is one of the parents of the GEN clock. It is
generated inside the A1 Peripherals clock controller from 'sys_pll' PLL
clock source with a fixed factor.

Signed-off-by: Dmitry Rokosov <ddrokosov@...utedevices.com>
---
 drivers/clk/meson/a1-peripherals.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/meson/a1-peripherals.c b/drivers/clk/meson/a1-peripherals.c
index 621af1e6e4b2..56e44299982c 100644
--- a/drivers/clk/meson/a1-peripherals.c
+++ b/drivers/clk/meson/a1-peripherals.c
@@ -746,14 +746,27 @@ static struct clk_regmap fclk_div2_divn = {
 	},
 };
 
+static struct clk_fixed_factor sys_pll_div16 = {
+	.mult = 1,
+	.div = 16,
+	.hw.init = &(struct clk_init_data){
+		.name = "sys_pll_div16",
+		.ops = &clk_fixed_factor_ops,
+		.parent_data = &(const struct clk_parent_data) {
+			.fw_name = "sys_pll",
+		},
+		.num_parents = 1,
+	},
+};
+
 /*
- * the index 2 is sys_pll_div16, it will be implemented in the CPU clock driver,
  * the index 4 is the clock measurement source, it's not supported yet
  */
-static u32 gen_table[] = { 0, 1, 3, 5, 6, 7, 8 };
+static u32 gen_table[] = { 0, 1, 2, 3, 5, 6, 7, 8 };
 static const struct clk_parent_data gen_parent_data[] = {
 	{ .fw_name = "xtal", },
 	{ .hw = &rtc.hw },
+	{ .hw = &sys_pll_div16.hw, },
 	{ .fw_name = "hifi_pll", },
 	{ .fw_name = "fclk_div2", },
 	{ .fw_name = "fclk_div3", },
@@ -2024,6 +2037,7 @@ static struct clk_hw *a1_periphs_hw_clks[] = {
 	[CLKID_DMC_SEL]			= &dmc_sel.hw,
 	[CLKID_DMC_DIV]			= &dmc_div.hw,
 	[CLKID_DMC_SEL2]		= &dmc_sel2.hw,
+	[CLKID_SYS_PLL_DIV16]		= &sys_pll_div16.hw,
 };
 
 /* Convenience table to populate regmap in .probe */
-- 
2.43.0