diff mbox series

[15/89] clk: bcm: rpi: Create a data structure for the clocks

Message ID adc5810f9ed6400940f36be6e0a3a7255c557687.1582533919.git-series.maxime@cerno.tech (mailing list archive)
State New, archived
Headers show
Series drm/vc4: Support BCM2711 Display Pipeline | expand

Commit Message

Maxime Ripard Feb. 24, 2020, 9:06 a.m. UTC 
So far the driver has really only been providing a single clock, and stored
both the data associated to that clock in particular with the data
associated to the "controller".

Since we will change that in the future, let's decouple the clock data from
the provider data.

Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: linux-clk@vger.kernel.org
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/clk/bcm/clk-raspberrypi.c | 40 ++++++++++++++++++++------------
 1 file changed, 26 insertions(+), 14 deletions(-)

Comments

Nicolas Saenz Julienne Feb. 25, 2020, 4:24 p.m. UTC | #1 
On Mon, 2020-02-24 at 10:06 +0100, Maxime Ripard wrote:
> So far the driver has really only been providing a single clock, and stored
> both the data associated to that clock in particular with the data
> associated to the "controller".
> 
> Since we will change that in the future, let's decouple the clock data from
> the provider data.
> 
> Cc: Michael Turquette <mturquette@baylibre.com>
> Cc: Stephen Boyd <sboyd@kernel.org>
> Cc: linux-clk@vger.kernel.org
> Signed-off-by: Maxime Ripard <maxime@cerno.tech>

Acked-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>

Thanks!
Nicolas
Stephen Boyd March 13, 2020, 1:11 a.m. UTC | #2 
Quoting Maxime Ripard (2020-02-24 01:06:17)
> So far the driver has really only been providing a single clock, and stored
> both the data associated to that clock in particular with the data
> associated to the "controller".
> 
> Since we will change that in the future, let's decouple the clock data from
> the provider data.
> 
> Cc: Michael Turquette <mturquette@baylibre.com>
> Cc: Stephen Boyd <sboyd@kernel.org>
> Cc: linux-clk@vger.kernel.org
> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
> ---

Reviewed-by: Stephen Boyd <sboyd@kernel.org>
diff mbox series

Patch

diff --git a/drivers/clk/bcm/clk-raspberrypi.c b/drivers/clk/bcm/clk-raspberrypi.c
index b8b55134ba3f..964fc8f792cc 100644
--- a/drivers/clk/bcm/clk-raspberrypi.c
+++ b/drivers/clk/bcm/clk-raspberrypi.c
@@ -35,11 +35,15 @@  struct raspberrypi_clk {
 	struct device *dev;
 	struct rpi_firmware *firmware;
 	struct platform_device *cpufreq;
+};
+
+struct raspberrypi_clk_data {
+	struct clk_hw hw;
 
 	unsigned long min_rate;
 	unsigned long max_rate;
 
-	struct clk_hw pllb;
+	struct raspberrypi_clk *rpi;
 };
 
 /*
@@ -83,8 +87,9 @@  static int raspberrypi_clock_property(struct rpi_firmware *firmware, u32 tag,
 
 static int raspberrypi_fw_pll_is_on(struct clk_hw *hw)
 {
-	struct raspberrypi_clk *rpi = container_of(hw, struct raspberrypi_clk,
-						   pllb);
+	struct raspberrypi_clk_data *data =
+		container_of(hw, struct raspberrypi_clk_data, hw);
+	struct raspberrypi_clk *rpi = data->rpi;
 	u32 val = 0;
 	int ret;
 
@@ -101,8 +106,9 @@  static int raspberrypi_fw_pll_is_on(struct clk_hw *hw)
 static unsigned long raspberrypi_fw_pll_get_rate(struct clk_hw *hw,
 						 unsigned long parent_rate)
 {
-	struct raspberrypi_clk *rpi = container_of(hw, struct raspberrypi_clk,
-						   pllb);
+	struct raspberrypi_clk_data *data =
+		container_of(hw, struct raspberrypi_clk_data, hw);
+	struct raspberrypi_clk *rpi = data->rpi;
 	u32 val = 0;
 	int ret;
 
@@ -119,8 +125,9 @@  static unsigned long raspberrypi_fw_pll_get_rate(struct clk_hw *hw,
 static int raspberrypi_fw_pll_set_rate(struct clk_hw *hw, unsigned long rate,
 				       unsigned long parent_rate)
 {
-	struct raspberrypi_clk *rpi = container_of(hw, struct raspberrypi_clk,
-						   pllb);
+	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;
 	int ret;
 
@@ -142,13 +149,13 @@  static int raspberrypi_fw_pll_set_rate(struct clk_hw *hw, unsigned long rate,
 static int raspberrypi_pll_determine_rate(struct clk_hw *hw,
 					  struct clk_rate_request *req)
 {
-	struct raspberrypi_clk *rpi = container_of(hw, struct raspberrypi_clk,
-						   pllb);
+	struct raspberrypi_clk_data *data =
+		container_of(hw, struct raspberrypi_clk_data, hw);
 	u64 div, final_rate;
 	u32 ndiv, fdiv;
 
 	/* We can't use req->rate directly as it would overflow */
-	final_rate = clamp(req->rate, rpi->min_rate, rpi->max_rate);
+	final_rate = clamp(req->rate, data->min_rate, data->max_rate);
 
 	div = (u64)final_rate << A2W_PLL_FRAC_BITS;
 	do_div(div, req->best_parent_rate);
@@ -173,10 +180,15 @@  static const struct clk_ops raspberrypi_firmware_pll_clk_ops = {
 
 static int raspberrypi_register_pllb(struct raspberrypi_clk *rpi)
 {
+	struct raspberrypi_clk_data *data;
 	struct clk_init_data init = {};
 	u32 min_rate = 0, max_rate = 0;
 	int ret;
 
+	data = devm_kzalloc(rpi->dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+	data->rpi = rpi;
 
 	/* All of the PLLs derive from the external oscillator. */
 	init.parent_names = (const char *[]){ "osc" };
@@ -215,12 +227,12 @@  static int raspberrypi_register_pllb(struct raspberrypi_clk *rpi)
 	dev_info(rpi->dev, "CPU frequency range: min %u, max %u\n",
 		 min_rate, max_rate);
 
-	rpi->min_rate = min_rate * RPI_FIRMWARE_PLLB_ARM_DIV_RATE;
-	rpi->max_rate = max_rate * RPI_FIRMWARE_PLLB_ARM_DIV_RATE;
+	data->min_rate = min_rate * RPI_FIRMWARE_PLLB_ARM_DIV_RATE;
+	data->max_rate = max_rate * RPI_FIRMWARE_PLLB_ARM_DIV_RATE;
 
-	rpi->pllb.init = &init;
+	data->hw.init = &init;
 
-	return devm_clk_hw_register(rpi->dev, &rpi->pllb);
+	return devm_clk_hw_register(rpi->dev, &data->hw);
 }
 
 static struct clk_fixed_factor raspberrypi_clk_pllb_arm = {