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dts: bindings: can: mcan: switch to using bosch,mram-cfg property

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Switch the Bosch M_CAN devicetree binding to use a bosch,mram-cfg property
for specifying the memory layout of the Bosch M_CAN Message RAM. This is
identical to the Linux kernel devicetree binding for Bosch M_CAN IP core
based CAN controllers.

This introduces an offset cell which can be used for controllers with
shared Message RAM between Bosch M_CAN instances.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
This commit is contained in:
Henrik Brix Andersen 2022-05-03 14:04:33 +02:00 • committed by Anas Nashif
commit 6cd67e67fe
12 changed files with 35 additions and 86 deletions
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15
drivers/can/can_mcan.h
View file

@ -389,12 +389,13 @@
#define MCAN_DT_PATH DT_PATH(soc, can)
#endif
#define NUM_STD_FILTER_ELEMENTS DT_PROP(MCAN_DT_PATH, std_filter_elements)
#define NUM_EXT_FILTER_ELEMENTS DT_PROP(MCAN_DT_PATH, ext_filter_elements)
#define NUM_RX_FIFO0_ELEMENTS DT_PROP(MCAN_DT_PATH, rx_fifo0_elements)
#define NUM_RX_FIFO1_ELEMENTS DT_PROP(MCAN_DT_PATH, rx_fifo0_elements)
#define NUM_RX_BUF_ELEMENTS DT_PROP(MCAN_DT_PATH, rx_buffer_elements)
#define NUM_TX_BUF_ELEMENTS DT_PROP(MCAN_DT_PATH, tx_buffer_elements)
#define NUM_STD_FILTER_ELEMENTS DT_PROP_BY_IDX(MCAN_DT_PATH, bosch_mram_cfg, 1)
#define NUM_EXT_FILTER_ELEMENTS DT_PROP_BY_IDX(MCAN_DT_PATH, bosch_mram_cfg, 2)
#define NUM_RX_FIFO0_ELEMENTS DT_PROP_BY_IDX(MCAN_DT_PATH, bosch_mram_cfg, 3)
#define NUM_RX_FIFO1_ELEMENTS DT_PROP_BY_IDX(MCAN_DT_PATH, bosch_mram_cfg, 4)
#define NUM_RX_BUF_ELEMENTS DT_PROP_BY_IDX(MCAN_DT_PATH, bosch_mram_cfg, 5)
#define NUM_TX_EVENT_FIFO_ELEMENTS DT_PROP_BY_IDX(MCAN_DT_PATH, bosch_mram_cfg, 6)
#define NUM_TX_BUF_ELEMENTS DT_PROP_BY_IDX(MCAN_DT_PATH, bosch_mram_cfg, 7)
#ifdef CONFIG_CAN_STM32FD
#define NUM_STD_FILTER_DATA CONFIG_CAN_MAX_STD_ID_FILTER
@ -529,7 +530,7 @@ struct can_mcan_msg_sram {
volatile struct can_mcan_rx_fifo rx_fifo0[NUM_RX_FIFO0_ELEMENTS];
volatile struct can_mcan_rx_fifo rx_fifo1[NUM_RX_FIFO1_ELEMENTS];
volatile struct can_mcan_rx_fifo rx_buffer[NUM_RX_BUF_ELEMENTS];
volatile struct can_mcan_tx_event_fifo tx_event_fifo[NUM_TX_BUF_ELEMENTS];
volatile struct can_mcan_tx_event_fifo tx_event_fifo[NUM_TX_EVENT_FIFO_ELEMENTS];
volatile struct can_mcan_tx_buffer tx_buffer[NUM_TX_BUF_ELEMENTS];
} __packed __aligned(4);

7
dts/arm/atmel/samc21.dtsi
View file

@ -48,12 +48,7 @@
compatible = "bosch,m_can-base";
#address-cells = <1>;
#size-cells = <1>;
std-filter-elements = <28>;
ext-filter-elements = <8>;
rx-fifo0-elements = <3>;
rx-fifo1-elements = <3>;
rx-buffer-elements = <0>;
tx-buffer-elements = <1>;
bosch,mram-cfg = <0x0 28 8 3 3 0 1 1>;
can0: can@42001c00 {
compatible = "atmel,sam0-can";

7
dts/arm/atmel/same70.dtsi
View file

@ -412,12 +412,7 @@
compatible = "bosch,m_can-base";
#address-cells = <1>;
#size-cells = <1>;
std-filter-elements = <28>;
ext-filter-elements = <8>;
rx-fifo0-elements = <3>;
rx-fifo1-elements = <3>;
rx-buffer-elements = <0>;
tx-buffer-elements = <1>;
bosch,mram-cfg = <0x0 28 8 3 3 0 1 1>;
can0: can@40030000 {
compatible = "atmel,sam-can";

7
dts/arm/nxp/nxp_lpc55S0x_common.dtsi
View file

@ -222,12 +222,7 @@
reg = <0x9d000 0x1000>;
interrupts = <43 0>, <44 0>;
clocks = <&syscon MCUX_MCAN_CLK>;
std-filter-elements = <15>;
ext-filter-elements = <15>;
rx-fifo0-elements = <8>;
rx-fifo1-elements = <8>;
rx-buffer-elements = <8>;
tx-buffer-elements = <15>;
bosch,mram-cfg = <0x0 15 15 8 8 0 15 15>;
sjw = <1>;
sample-point = <875>;
sjw-data = <1>;

7
dts/arm/nxp/nxp_lpc55S1x_common.dtsi
View file

@ -216,12 +216,7 @@
reg = <0x9d000 0x1000>;
interrupts = <43 0>, <44 0>;
clocks = <&syscon MCUX_MCAN_CLK>;
std-filter-elements = <15>;
ext-filter-elements = <15>;
rx-fifo0-elements = <8>;
rx-fifo1-elements = <8>;
rx-buffer-elements = <8>;
tx-buffer-elements = <15>;
bosch,mram-cfg = <0x0 15 15 8 8 0 15 15>;
sjw = <1>;
sample-point = <875>;
sjw-data = <1>;

7
dts/arm/nxp/nxp_lpc55S3x_common.dtsi
View file

@ -254,12 +254,7 @@
reg = <0x4009d000 0x1000>;
interrupts = <43 0>, <44 0>;
clocks = <&syscon MCUX_MCAN_CLK>;
std-filter-elements = <15>;
ext-filter-elements = <15>;
rx-fifo0-elements = <8>;
rx-fifo1-elements = <8>;
rx-buffer-elements = <8>;
tx-buffer-elements = <15>;
bosch,mram-cfg = <0x0 15 15 8 8 0 15 15>;
sjw = <1>;
sample-point = <875>;
sjw-data = <1>;

7
dts/arm/st/g0/stm32g0b1.dtsi
View file

@ -34,12 +34,7 @@
compatible = "bosch,m_can-base";
#address-cells = <1>;
#size-cells = <1>;
std-filter-elements = <28>;
ext-filter-elements = <8>;
rx-fifo0-elements = <3>;
rx-fifo1-elements = <3>;
rx-buffer-elements = <0>;
tx-buffer-elements = <3>;
bosch,mram-cfg = <0x0 28 8 3 3 0 3 3>;
can1: can@40006400 {
compatible = "st,stm32-fdcan";

7
dts/arm/st/g4/stm32g4.dtsi
View file

@ -385,12 +385,7 @@
compatible = "bosch,m_can-base";
#address-cells = <1>;
#size-cells = <1>;
std-filter-elements = <28>;
ext-filter-elements = <8>;
rx-fifo0-elements = <3>;
rx-fifo1-elements = <3>;
rx-buffer-elements = <0>;
tx-buffer-elements = <3>;
bosch,mram-cfg = <0x0 28 8 3 3 0 3 3>;
can1: can@40006400 {
compatible = "st,stm32-fdcan";

7
dts/arm/st/h5/stm32h5.dtsi
View file

@ -440,12 +440,7 @@
compatible = "bosch,m_can-base";
#address-cells = <1>;
#size-cells = <1>;
std-filter-elements = <28>;
ext-filter-elements = <8>;
rx-fifo0-elements = <3>;
rx-fifo1-elements = <3>;
rx-buffer-elements = <0>;
tx-buffer-elements = <3>;
bosch,mram-cfg = <0x0 28 8 3 3 0 3 3>;
can1: can@4000a400 {
compatible = "st,stm32-fdcan";

7
dts/arm/st/h7/stm32h7.dtsi
View file

@ -469,12 +469,7 @@
compatible = "bosch,m_can-base";
#address-cells = <1>;
#size-cells = <1>;
std-filter-elements = <28>;
ext-filter-elements = <8>;
rx-fifo0-elements = <3>;
rx-fifo1-elements = <3>;
rx-buffer-elements = <3>;
tx-buffer-elements = <3>;
bosch,mram-cfg = <0x0 28 8 3 3 0 3 3>;
can1: can@4000a000 {
compatible = "st,stm32h7-fdcan";

7
dts/arm/st/u5/stm32u5.dtsi
View file

@ -774,12 +774,7 @@
compatible = "bosch,m_can-base";
#address-cells = <1>;
#size-cells = <1>;
std-filter-elements = <28>;
ext-filter-elements = <8>;
rx-fifo0-elements = <3>;
rx-fifo1-elements = <3>;
rx-buffer-elements = <0>;
tx-buffer-elements = <3>;
bosch,mram-cfg = <0x0 28 8 3 3 0 3 3>;
can1: can@4000a400 {
compatible = "st,stm32-fdcan";

36
dts/bindings/can/bosch,m_can-base.yaml
View file

@ -3,26 +3,24 @@ description: Bosch M_CAN CAN-FD controller base
compatible: "bosch,m_can-base"
properties:
std-filter-elements:
type: int
bosch,mram-cfg:
type: array
required: true
description: |
Bosch M_CAN message RAM configuration. The cells in the array have the following format:
ext-filter-elements:
type: int
required: true
<offset std-filter-elements ext-filter-elements rx-fifo0-elements rx-fifo1-elements
rx-buffer-elements tx-event-fifo-elements tx-buffer-elements>
rx-fifo0-elements:
type: int
required: true
The 'offset' is an address offset of the message RAM where the following elements start
from. This is normally set to 0x0 when using a non-shared message RAM. The remaining cells
specify how many elements are allocated for each filter type/FIFO/buffer.
rx-fifo1-elements:
type: int
required: true
rx-buffer-elements:
type: int
required: true
tx-buffer-elements:
type: int
required: true
The Bosch M_CAN IP supports the following elements:
11-bit Filter 0-128 elements / 0-128 words
29-bit Filter 0-64 elements / 0-128 words
Rx FIFO 0 0-64 elements / 0-1152 words
Rx FIFO 1 0-64 elements / 0-1152 words
Rx Buffers 0-64 elements / 0-1152 words
Tx Event FIFO 0-32 elements / 0-64 words
Tx Buffers 0-32 elements / 0-576 words