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clk: bcm: rpi: Add an enum for the firmware clocks

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While the firmware allows us to discover the available clocks, we need to
discriminate those clocks to only register the ones meaningful to Linux.
The firmware also doesn't provide a clock name, so having a list of the ID
will help us to give clocks a proper name later on.

Acked-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/4738f77ee7de9b48a3bb1c558ead958d0cc064d9.1592210452.git-series.maxime@cerno.tech
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Maxime Ripard 2020-06-15 10:41:00 +02:00 committed by Stephen Boyd
parent d4b4f1b6b9
commit be1559f697
1 changed files with 19 additions and 4 deletions
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23
drivers/clk/bcm/clk-raspberrypi.c
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@ -18,7 +18,23 @@
#include <soc/bcm2835/raspberrypi-firmware.h>
#define RPI_FIRMWARE_ARM_CLK_ID 0x00000003
enum rpi_firmware_clk_id {
RPI_FIRMWARE_EMMC_CLK_ID = 1,
RPI_FIRMWARE_UART_CLK_ID,
RPI_FIRMWARE_ARM_CLK_ID,
RPI_FIRMWARE_CORE_CLK_ID,
RPI_FIRMWARE_V3D_CLK_ID,
RPI_FIRMWARE_H264_CLK_ID,
RPI_FIRMWARE_ISP_CLK_ID,
RPI_FIRMWARE_SDRAM_CLK_ID,
RPI_FIRMWARE_PIXEL_CLK_ID,
RPI_FIRMWARE_PWM_CLK_ID,
RPI_FIRMWARE_HEVC_CLK_ID,
RPI_FIRMWARE_EMMC2_CLK_ID,
RPI_FIRMWARE_M2MC_CLK_ID,
RPI_FIRMWARE_PIXEL_BVB_CLK_ID,
RPI_FIRMWARE_NUM_CLK_ID,
};
#define RPI_FIRMWARE_STATE_ENABLE_BIT BIT(0)
#define RPI_FIRMWARE_STATE_WAIT_BIT BIT(1)
@ -31,8 +47,6 @@
#define A2W_PLL_FRAC_BITS 20
#define NUM_FW_CLKS 16
struct raspberrypi_clk {
struct device *dev;
struct rpi_firmware *firmware;
@ -320,7 +334,8 @@ static int raspberrypi_clk_probe(struct platform_device *pdev)
rpi->firmware = firmware;
platform_set_drvdata(pdev, rpi);
clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, NUM_FW_CLKS),
clk_data = devm_kzalloc(dev, struct_size(clk_data, hws,
RPI_FIRMWARE_NUM_CLK_ID),
GFP_KERNEL);
if (!clk_data)
return -ENOMEM;