linux-kernel - [PATCH v3 17/25] clk: bcm: rpi: Split pllb clock hooks

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <10e269b4c3c5cf38eba9c0684341b191b9ab7abe.1590594293.git-series.maxime@cerno.tech>
Date:   Wed, 27 May 2020 17:45:13 +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>,
        Maxime Ripard <maxime@...no.tech>,
        Michael Turquette <mturquette@...libre.com>,
        linux-clk@...r.kernel.org, Stephen Boyd <sboyd@...nel.org>
Subject: [PATCH v3 17/25] clk: bcm: rpi: Split pllb clock hooks

The driver only supports the pllb for now and all the clock framework hooks
are a mix of the generic firmware interface and the specifics of the pllb.
Since we will support more clocks in the future let's split the generic and
specific hooks

Cc: Michael Turquette <mturquette@...libre.com>
Cc: linux-clk@...r.kernel.org
Reviewed-by: Stephen Boyd <sboyd@...nel.org>
Signed-off-by: Maxime Ripard <maxime@...no.tech>
---
 drivers/clk/bcm/clk-raspberrypi.c | 30 ++++++++++++++++++++++--------
 1 file changed, 22 insertions(+), 8 deletions(-)

diff --git a/drivers/clk/bcm/clk-raspberrypi.c b/drivers/clk/bcm/clk-raspberrypi.c
index 58ac1b104429..19571602ba64 100644
--- a/drivers/clk/bcm/clk-raspberrypi.c
+++ b/drivers/clk/bcm/clk-raspberrypi.c
@@ -102,8 +102,8 @@ static int raspberrypi_fw_is_prepared(struct clk_hw *hw)
 }
 
 
-static unsigned long raspberrypi_fw_pll_get_rate(struct clk_hw *hw,
-						 unsigned long parent_rate)
+static unsigned long raspberrypi_fw_get_rate(struct clk_hw *hw,
+					     unsigned long parent_rate)
 {
 	struct raspberrypi_clk_data *data =
 		container_of(hw, struct raspberrypi_clk_data, hw);
@@ -116,21 +116,27 @@ static unsigned long raspberrypi_fw_pll_get_rate(struct clk_hw *hw,
 	if (ret)
 		return ret;
 
-	return val * RPI_FIRMWARE_PLLB_ARM_DIV_RATE;
+	return val;
 }
 
-static int raspberrypi_fw_pll_set_rate(struct clk_hw *hw, unsigned long rate,
-				       unsigned long parent_rate)
+static unsigned long raspberrypi_fw_pll_get_rate(struct clk_hw *hw,
+						 unsigned long parent_rate)
+{
+	return raspberrypi_fw_get_rate(hw, parent_rate) *
+		RPI_FIRMWARE_PLLB_ARM_DIV_RATE;
+}
+
+static int raspberrypi_fw_set_rate(struct clk_hw *hw, unsigned long rate,
+				   unsigned long parent_rate)
 {
 	struct raspberrypi_clk_data *data =
 		container_of(hw, struct raspberrypi_clk_data, hw);
 	struct raspberrypi_clk *rpi = data->rpi;
-	u32 new_rate = rate / RPI_FIRMWARE_PLLB_ARM_DIV_RATE;
+	u32 _rate = rate;
 	int ret;
 
 	ret = raspberrypi_clock_property(rpi->firmware, data,
-					 RPI_FIRMWARE_SET_CLOCK_RATE,
-					 &new_rate);
+					 RPI_FIRMWARE_SET_CLOCK_RATE, &_rate);
 	if (ret)
 		dev_err_ratelimited(rpi->dev, "Failed to change %s frequency: %d",
 				    clk_hw_get_name(hw), ret);
@@ -138,6 +144,14 @@ static int raspberrypi_fw_pll_set_rate(struct clk_hw *hw, unsigned long rate,
 	return ret;
 }
 
+static int raspberrypi_fw_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+				       unsigned long parent_rate)
+{
+	u32 new_rate = rate / RPI_FIRMWARE_PLLB_ARM_DIV_RATE;
+
+	return raspberrypi_fw_set_rate(hw, new_rate, parent_rate);
+}
+
 /*
  * Sadly there is no firmware rate rounding interface. We borrowed it from
  * clk-bcm2835.
-- 
git-series 0.9.1