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

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
View File

@ -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;