Commit df4b6a4c authored by Maxime Ripard's avatar Maxime Ripard Committed by Stephen Boyd

clk: bcm: rpi: Use CCF boundaries instead of rolling our own

The raspberrypi firmware clock driver has a min_rate / max_rate clamping by
storing the info it needs in a private structure.

However, the CCF already provides such a facility, so we can switch to it
to remove the boilerplate.
Reviewed-by: default avatarNicolas Saenz Julienne <nsaenzjulienne@suse.de>
Tested-by: default avatarNicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: default avatarMaxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/d4c53dab6de5d5f70743d9c139d0117589530e62.1592210452.git-series.maxime@cerno.techSigned-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent 9bd43a61
......@@ -36,9 +36,6 @@ struct raspberrypi_clk {
struct rpi_firmware *firmware;
struct platform_device *cpufreq;
unsigned long min_rate;
unsigned long max_rate;
struct clk_hw pllb;
};
......@@ -142,13 +139,11 @@ 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);
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, req->min_rate, req->max_rate);
div = (u64)final_rate << A2W_PLL_FRAC_BITS;
do_div(div, req->best_parent_rate);
......@@ -215,12 +210,15 @@ 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;
rpi->pllb.init = &init;
return devm_clk_hw_register(rpi->dev, &rpi->pllb);
ret = devm_clk_hw_register(rpi->dev, &rpi->pllb);
if (!ret)
clk_hw_set_rate_range(&rpi->pllb,
min_rate * RPI_FIRMWARE_PLLB_ARM_DIV_RATE,
max_rate * RPI_FIRMWARE_PLLB_ARM_DIV_RATE);
return ret;
}
static struct clk_fixed_factor raspberrypi_clk_pllb_arm = {
......
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