linux-kernel - [PATCH v5 06/27] clk: bcm: rpi: Use clk_hw_register for pllb

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Date:   Mon, 15 Jun 2020 10:40:46 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc:     linux-rpi-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Tim Gover <tim.gover@...pberrypi.com>,
        Phil Elwell <phil@...pberrypi.com>,
        Mike Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, linux-clk@...r.kernel.org,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Maxime Ripard <maxime@...no.tech>
Subject: [PATCH v5 06/27] clk: bcm: rpi: Use clk_hw_register for pllb_arm

The pllb_arm clock is defined as a fixed factor clock with the pllb
clock as a parent. However, all its configuration is entirely static,
and thus we don't really need to call clk_hw_register_fixed_factor() but
can simply call clk_hw_register() with a static clk_fixed_factor
structure.

Cc: Michael Turquette <mturquette@...libre.com>
Cc: linux-clk@...r.kernel.org
Acked-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Reviewed-by: Stephen Boyd <sboyd@...nel.org>
Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Signed-off-by: Maxime Ripard <maxime@...no.tech>
---
 drivers/clk/bcm/clk-raspberrypi.c | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/bcm/clk-raspberrypi.c b/drivers/clk/bcm/clk-raspberrypi.c
index ddc72207212e..5f0d4875e145 100644
--- a/drivers/clk/bcm/clk-raspberrypi.c
+++ b/drivers/clk/bcm/clk-raspberrypi.c
@@ -225,16 +225,28 @@ static int raspberrypi_register_pllb(struct raspberrypi_clk *rpi)
 	return devm_clk_hw_register(rpi->dev, &rpi->pllb);
 }
 
+static struct clk_fixed_factor raspberrypi_clk_pllb_arm = {
+	.mult = 1,
+	.div = 2,
+	.hw.init = &(struct clk_init_data) {
+		.name		= "pllb_arm",
+		.parent_names	= (const char *[]){ "pllb" },
+		.num_parents	= 1,
+		.ops		= &clk_fixed_factor_ops,
+		.flags		= CLK_SET_RATE_PARENT | CLK_GET_RATE_NOCACHE,
+	},
+};
+
 static int raspberrypi_register_pllb_arm(struct raspberrypi_clk *rpi)
 {
-	rpi->pllb_arm = clk_hw_register_fixed_factor(rpi->dev,
-				"pllb_arm", "pllb",
-				CLK_SET_RATE_PARENT | CLK_GET_RATE_NOCACHE,
-				1, 2);
-	if (IS_ERR(rpi->pllb_arm)) {
+	int ret;
+
+	ret = clk_hw_register(rpi->dev, &raspberrypi_clk_pllb_arm.hw);
+	if (ret) {
 		dev_err(rpi->dev, "Failed to initialize pllb_arm\n");
-		return PTR_ERR(rpi->pllb_arm);
+		return ret;
 	}
+	rpi->pllb_arm = &raspberrypi_clk_pllb_arm.hw;
 
 	rpi->pllb_arm_lookup = clkdev_hw_create(rpi->pllb_arm, NULL, "cpu0");
 	if (!rpi->pllb_arm_lookup) {
-- 
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