Rpmsg gpiodrv #247

deebot · 2020-08-23T15:31:46Z

This is a driver that enables the use of sysfs interface and chardev interface with libgpiod to send and receive messages to the PRU. Please review it . You might also want to look into my repo where i have used it to control shift register. https://github.com/deebot/Beaglebone-BidirectionBus/tree/dev

http://git.ti.com/gitweb/?p=processor-firmware/ti-amx3-cm3-pm-firmware.git;a=commit;h=6a849767df85ce9399494f53fb5c753665396653 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

https://github.com/beagleboard/BeagleBoard-DeviceTrees/tree/v4.14.x-ti beagleboard/BeagleBoard-DeviceTrees@4a9c0a6 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

Reference: v5.3.18 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

Reference: v5.0.21 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

Reference: v4.14.77 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

The firmware for brcmfmac devices includes information regarding regulatory constraints. For certain devices this information is kept separately in a binary form that needs to be downloaded to the device. This patch adds support to download this so-called CLM blob file. It uses the same naming scheme as the other firmware files with extension of .clm_blob. The CLM blob file is optional. If the file does not exist, the download process will be bypassed. It will not affect the driver loading. Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com> Signed-off-by: Chung-Hsien Hsu <stanley.hsu@cypress.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

We got SDIO_CRC_ERROR with 4373 on SDR104 when doing bi-directional throughput test. Setting F2 blocksize and enable watermark to 256 to guarantee the operation stability. Signed-off-by: Wright Feng <wright.feng@cypress.com>

broken_sg_support, sd_head_align, and sd_sgentry_align are used in brcmfmac code but not configurable in dts file. Add the parsing logic. Now they can be configured like below in dts: brcm,broken_sg_support; brcm,sd_head_align = /bits/ 16 <4>; brcm,sd_sgentry_align = /bits/ 16 <4>; Signed-off-by: Chi-hsien Lin <chi-hsien.lin@cypress.com>

Firmware returns proprietary error code when getting error in fil_cmd_data_set or fil_cmd_data_get. Sometimes the vendor tool or utilities which uses libnl may stuck in some commands when wl is down. For example, issue "scan" command after issuing "down" command, the "scan" command will be the blocking call and stuck as no response from firmware. It is caused by that firmware returns BCME_NOTUP(-4) when wl is down, but in Linux the -4 is -EINTR, so libnl catches the error and not pass to upper layer. Because of that, the driver should return Linux error code instead of the proprietary error code, and the tools or utilities need to get the real firmware error code by another command "bcmerrorstr" after receiving the error. Signed-off-by: Wright Feng <wright.feng@cypress.com>

CYW43012 is a 1x1 802.11a/b/g/n Dual-Band HT20, 256-QAM/Turbo QAM. It is an Ultra Low Power WLAN+BT combo chip. Signed-off-by: Chi-Hsien Lin <chi-hsien.lin@cypress.com>

APSTA can work on two band concurrently with using VSDB(Virtual Simultaneous Dual-Band) or RSDB(Real Simultaneous Dual-Band) features. In this case, we have to keep apsta is 1 in firmware side. If we start wpa_supplicant on wlan0 and then start hostapd on wlan1, the apsta will be set to 0, and data will be stall on wlan0(station). Because that, we only set apsta to 0 when AP start on primary interface. Signed-off-by: Wright Feng <wright.feng@cypress.com>

Saverestore register settings for 43012. Signed-off-by: Praveen Babu Chandran <pucn@cypress.com>

This patch will add 43455 into the save-restore(SR) capable chip list, so the SR engine will be enabled with 43455 FW which built-in the -sr function. Signed-off-by: Lo-Hsiang Lo <double.lo@cypress.com>

…bled For legacy chips w/o CLM blob files, kernel with user helper function enabled returns -EAGAIN when we request_firmware() for blob file: "request_firmware() -> _request_firmware() -> fw_load_from_user_helper() -> _request_firmware_load() -> retval=-EAGAIN" We should do retries and also continue brcmf_c_process_clm_blob if getting -EAGAIN from request_firmware function. Signed-off-by: Wright Feng <wright.feng@cypress.com>

The buffer size of return of cap iovar is greater than 256 bytes in some firmares. For instance, the return size of cap iovar is 271 bytes in 4373 13.10.246.79 firmare. It makes caps buffer is default value and cause the feature capability parsing failed. Because of that, we enlarge caps buffer size to 512 bytes and add the error print for cap iovar error. Signed-off-by: Wright Feng <wright.feng@cypress.com>

Linux 3.6 introduces TSQ which has a per socket threshold for TCP Tx packet to reduce latency. In fcmode 1/2, host driver enqueues skb in hanger and TCP doesn't push new skb frees until host frees the skb when receiving fwstatus event. So using skb_orphan before sending skb to bus will make the skb removing the ownership of socket. With this patch, we got better throughput in fcmode 1/2. Tested 43455 TCP throughput in 20 MHz bandwidth with/without this patch. fcmode 0: 59.5 / 59.6 (Mbps) fcmode 1: 59.3 / 23.4 (Mbps) fcmode 2: 59.6 / 21.5 (Mbps) Signed-off-by: Wright Feng <wright.feng@cypress.com>

…DP RX Traffic. The number of words that the read FIFO has to contain except the end of frame before sends data back to the host. Max watermark = (512B - 2* (BurstLength))/4 = (512 - 128)/4 = 384/4 = 0x60 so if burst length (i.e. BurstLength = 64) is increased, watermark has to be reduced. This is the optimal setting for this chip. Signed-off-by: Naveen Gupta <nagu@cypress.com>

In Deep Sleep mode ARM is off and once Exit trigger comes than Mail Box Interrupt comes to Host and whole Re Initiation should be done in the ARM to start TX/RX. Signed-off-by: Naveen Gupta <nagu@cypress.com>

Add WLAN_AKM_SUITE_FT_8021X and WLAN_AKM_SUITE_FT_PSK in brcmf_set_key_mgmt() for FT support. Signed-off-by: Chung-Hsien Hsu <stanley.hsu@cypress.com> Signed-off-by: Chi-hsien Lin <chi-hsien.lin@cypress.com>

Hostap daemon has a parameter "ap_isolate which is used to prevent low-level bridging of frames between associated stations in the BSS. For driver side, we add cfg80211 ops method change_bss to support setting AP isolation from user space. Signed-off-by: Wright Feng <wright.feng@cypress.com> Signed-off-by: Chi-hsien Lin <chi-hsien.lin@cypress.com>

Don't print ulp_sdioctrl get error as errors are expected for non ulp cases. Signed-off-by: Naveen Gupta <nagu@cypress.com>

There is a system warning message, warn_slowpath-fmt, during suspend while using supplicant join AP and enable wowl feature by IW command. It's cuased by brcmf_pno_remove_request path can't find the reqid. This fix will not go to remove pno request function if there is no pno scan. Signed-off-by: Lo-Hsiang Lo <double.lo@cypress.com>

To enhance RX throughput, we add a module parameter "sdio_dpc_prio" to let user can set scheduling priority for sdio_dpc. It can improve RX throughput by reducing the receiving time in sdio_dpc. Signed-off-by: Wright Feng <wright.feng@cypress.com>

When eap_restrict is enabled, firmware will toss non-802.1x frames from tx/rx data path if station not yet authorized. Internal firmware eap_restrict is disabled by default. This patch makes it possible to enable firmware eap_restrict by specifying eap_restrict=1 as module parameter. Signed-off-by: Wright Feng <wright.feng@cypress.com>

FMAC driver need to provide a dummy wowlan filter for kernel and provided the well configured wowlan stack. So the system will keep driver in connected state in suspend mode and can be wake up by ping packet. Enable unicast packet filter before system suspend and disable it after resume. Signed-off-by: Lo-Hsiang Lo <double.lo@cypress.com>

Set wowl configuration in disconnect state is redundant. Remove it to fix no scan result issue after resume. Signed-off-by: Lo-Hsiang Lo <double.lo@cypress.com>

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

This crashes the kernel when an runtime overlay is applied.

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

We have errata i688 workaround produce warnings on SoCs other than omap4 and omap5: omap4_sram_init:Unable to allocate sram needed to handle errata I688 omap4_sram_init:Unable to get sram pool needed to handle errata I688 This is happening because there is no ti,omap4-mpu node, or no SRAM to configure for the other SoCs, so let's remove the warning based on the SoC revision checks. As nobody has complained it seems that the other SoC variants do not need this workaround. Signed-off-by: Tony Lindgren <tony@atomide.com>

already default on BBB/X15, just calcuated everybootup Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

commit e33a814 upstream. gcc 10 will default to -fno-common, which causes this error at link time: (.text+0x0): multiple definition of `yylloc'; dtc-lexer.lex.o (symbol from plugin):(.text+0x0): first defined here This is because both dtc-lexer as well as dtc-parser define the same global symbol yyloc. Before with -fcommon those were merged into one defintion. The proper solution would be to to mark this as "extern", however that leads to: dtc-lexer.l:26:16: error: redundant redeclaration of 'yylloc' [-Werror=redundant-decls] 26 | extern YYLTYPE yylloc; | ^~~~~~ In file included from dtc-lexer.l:24: dtc-parser.tab.h:127:16: note: previous declaration of 'yylloc' was here 127 | extern YYLTYPE yylloc; | ^~~~~~ cc1: all warnings being treated as errors which means the declaration is completely redundant and can just be dropped. Signed-off-by: Dirk Mueller <dmueller@suse.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> [robh: cherry-pick from upstream] Cc: stable@vger.kernel.org Signed-off-by: Rob Herring <robh@kernel.org> [nc: Also apply to dtc-lexer.lex.c_shipped due to a lack of e039139, where dtc-lexer.l started being used] Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Reference: v5.2.21 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

4.14.108-ti-r137 bb.org_defconfig AUFS: sfjro/aufs4-standalone@df5c09a BBDTBS: beagleboard/BeagleBoard-DeviceTrees@4a9c0a6 CAN-ISOTP: hartkopp/can-isotp@ced84ca TI_AMX3_CM3: http://git.ti.com/gitweb/?p=processor-firmware/ti-amx3-cm3-pm-firmware.git;a=commit;h=6a849767df85ce9399494f53fb5c753665396653 WIREGUARD: https://git.zx2c4.com/WireGuard/commit/edad0d6e99e5133b1e8e865d727a25fff6399cb4 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

jadonk

I think @RobertCNelson is working on applying GSoC patches to newer kernels, so you might need to rebase against 4.19 or 5.4.

Please combine into a single patch, run checkpatch.pl, add some comments to help it be a good example and provide a more thorough commit message for posterity. :-)

Can you work out having the driver automatically loading the firmware?

jadonk · 2020-08-25T12:06:20Z

drivers/rpmsg/Kconfig

@@ -81,4 +81,15 @@ config RPMSG_PRU

 	  If unsure, say N.

+config CONFIG_RPMSG_GPIOHIP_INTERFACE
+	tristate "A rpmsg driver  with gpiochip interface"


Watch your whitespace and run checkpatch.pl.

Removed white spaces

I think @RobertCNelson is working on applying GSoC patches to newer kernels, so you might need to rebase against 4.19 or 5.4.

Please combine into a single patch, run checkpatch.pl, add some comments to help it be a good example and provide a more thorough commit message for posterity. :-)

Can you work out having the driver automatically loading the firmware?

I will try to implement automatic loading of firmware, also trying to rebase. For now i have amended the previous commit

jadonk · 2020-08-25T12:06:47Z

drivers/rpmsg/Makefile

@@ -9,4 +9,6 @@ obj-$(CONFIG_RPMSG_QCOM_SMD)	+= qcom_smd.o
 obj-$(CONFIG_RPMSG_VIRTIO)	+= virtio_rpmsg_bus.o

 obj-$(CONFIG_RPMSG_RPC)		+= rpmsg-rpc.o
+obj-$(CONFIG_RPMSG_GPIOCHIP_INTERFACE)    += rpmsg_gpio.o


Please combine this patch with the source code patch. I don't see any reason for them to be separate.

jadonk · 2020-08-25T12:07:54Z

drivers/rpmsg/rpmsg_gpio.c

@@ -0,0 +1,190 @@
+/*


Please add a description in the commit log. Please include information on the firmware required for the driver to function and steps for testing it.

jadonk · 2020-08-25T12:09:06Z

drivers/rpmsg/rpmsg_gpio.c

+ * PRU Remote Processor Messaging Driver with gpiochip interface 
+ * For example codes to test and run the complete communication between PRU and ARM
+ * https://github.com/deebot/Beaglebone-BidirectionBus/tree/dev
+ * This software is licensed under the terms of the GNU General Public


Give some space between documentation and license information for readability. Check out SPDX.

Space added

jadonk · 2020-08-25T12:09:35Z

drivers/rpmsg/rpmsg_gpio.c

+	wait_queue_head_t wait_list;
+	uint32_t gpio_state;
+	long input_state ;
+


Watch whitespace and run checkpatch.pl.

Removed all white spaces errors using checkpatch

jadonk · 2020-08-25T12:15:45Z

drivers/rpmsg/rpmsg_gpio.c

+		return -ENOSPC;
+	}
+
+	length = kfifo_in(&prudev->msg_fifo, data, len);


Is this where the "magic" happens? A comment here might be helpful. I believe this is the whole "meat" of the driver where you simply pass a message to the PRU using rpmsg. For this to be a good example, telling people what is going on here is critical.

This is one standard operation that happens in all rpmsg drivers i have seen. I have added a comment

jadonk · 2020-08-25T12:18:20Z

drivers/rpmsg/rpmsg_gpio.c

+	if (!prudev)
+		return -ENOMEM;
+	prudev->rpdev = rpdev;
+	ret = kfifo_alloc(&prudev->msg_fifo, MAX_FIFO_MSG * FIFO_MSG_SIZE,


Why is the return value ignored? What is this function doing? I imagine it is allocating RPMSG communication buffers, but for this to be an example, it should be well commented. That doesn't mean adding lots and lots of comments, but rather comments in critical locations to put things in the right light. It needs to be clear what is driver boilerplate and what are the custom parts that make this driver interesting.

This was part of boiler plate a standard process in all rpmsg examples i saw. I have added code to catch failour

jadonk · 2020-08-25T12:20:17Z

drivers/rpmsg/rpmsg_gpio.c

+#define RPMSG_BUF_SIZE				(512)
+#define MAX_FIFO_MSG				(32)
+#define FIFO_MSG_SIZE				RPMSG_BUF_SIZE
+#define GPIO_NUM 9


Why the magic number?

Buffer size and fifo sizes numbers come from virtio_rpmsg.h. the GPIO_NUM is 9 because i am sending 9 bits as payload.
I need 9 lines to send 9 bits.

jadonk · 2020-08-25T12:20:40Z

drivers/rpmsg/rpmsg_gpio.c

+	int msg_idx_rd;
+	int msg_idx_wr;
+	wait_queue_head_t wait_list;
+	uint32_t gpio_state;


What is the structure of this state variable?

This variable has 9 bits of data from 9 lines. If the MSB bit is 1 the PRU gets to know it need to configure the shift register as SIPO and push out the remaing 8 bit data to the LEDs or whatever connected to the shift registor. When this bit is low PRU discards the other 8 bits and configures the shift registor to read the data from I/O and send it back to the linux side.

jadonk · 2020-08-25T12:22:12Z

drivers/rpmsg/rpmsg_gpio.c

+	if(offset==GPIO_NUM-1){
+		memcpy((void*)&rpmsg_pru_buf,(void*)&(prudev->gpio_state),sizeof(&(prudev->gpio_state)));
+		pr_info("A check for checking gpio_state: %d",prudev->gpio_state);
+		ret=rpmsg_send(rpdev->ept, (void *)rpmsg_pru_buf, 2);


Ah, this is where the "magic" happens and the message is passed to the PRU to update the GPIO state. For this to be a good example for those trying to learn about the PRU and RPMSG, it is important to document the critical sections.

Yes here is where the data is packaged in char buf and is sent over to PRU.I have added a comment in the code.

RobertCNelson · 2020-08-25T14:13:13Z

I'll still merge this to v4.14.x-ti to give it some testing.

…ware Please follow instructions to load PRU firmware https://github.com/deebot/Beaglebone-BidirectionBus/blob/dev/bidirec_299/README.md - Added rule to compile rpmsg-gpio driver in Make and Kconfig

fixes: beagleboard/linux#247 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

RobertCNelson and others added 30 commits August 24, 2020 18:17

Add AM335x CM3 Power Managment Firmware

52af116

http://git.ti.com/gitweb/?p=processor-firmware/ti-amx3-cm3-pm-firmware.git;a=commit;h=6a849767df85ce9399494f53fb5c753665396653 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

Add BeagleBoard.org DTBS: v4.14.x-ti

5ef0d15

https://github.com/beagleboard/BeagleBoard-DeviceTrees/tree/v4.14.x-ti beagleboard/BeagleBoard-DeviceTrees@4a9c0a6 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

backports: stmpe: from: linux.git

31a3acc

Reference: v5.3.18 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

stmpe: wire up adc Kconfig/Makefile

b77a570

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

stmpe-ts: add invert/swap options

900d888

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

stmpe-ts.c: add offsets

d13e6b7

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

backports: vl53l0x: from: linux.git

be8c144

Reference: v5.0.21 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

wire up VL53L0X_I2C

6863634

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

backports: brcm80211: from: linux.git

deb370f

Reference: v4.14.77 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

brcmfmac: Set F2 blksz and Watermark to 256 for 4373

c866531

We got SDIO_CRC_ERROR with 4373 on SDR104 when doing bi-directional throughput test. Setting F2 blocksize and enable watermark to 256 to guarantee the operation stability. Signed-off-by: Wright Feng <wright.feng@cypress.com>

brcmfmac: Add support for CYW43012 SDIO chipset

1eb0717

CYW43012 is a 1x1 802.11a/b/g/n Dual-Band HT20, 256-QAM/Turbo QAM. It is an Ultra Low Power WLAN+BT combo chip. Signed-off-by: Chi-Hsien Lin <chi-hsien.lin@cypress.com>

brcmfmac: Saverestore support changes for 43012

4aa62c2

Saverestore register settings for 43012. Signed-off-by: Praveen Babu Chandran <pucn@cypress.com>

brcmfmac: Support 43455 save-restore (SR) feature if FW include -sr

5d94f29

This patch will add 43455 into the save-restore(SR) capable chip list, so the SR engine will be enabled with 43455 FW which built-in the -sr function. Signed-off-by: Lo-Hsiang Lo <double.lo@cypress.com>

brcmfmac: DS1 Exit should re download the firmware.

aa9bdb7

In Deep Sleep mode ARM is off and once Exit trigger comes than Mail Box Interrupt comes to Host and whole Re Initiation should be done in the ARM to start TX/RX. Signed-off-by: Naveen Gupta <nagu@cypress.com>

brcmfmac: add FT-based AKMs in brcmf_set_key_mgmt() for FT support

b3bd65c

Add WLAN_AKM_SUITE_FT_8021X and WLAN_AKM_SUITE_FT_PSK in brcmf_set_key_mgmt() for FT support. Signed-off-by: Chung-Hsien Hsu <stanley.hsu@cypress.com> Signed-off-by: Chi-hsien Lin <chi-hsien.lin@cypress.com>

brcmfmac: do not print ulp_sdioctrl get error

ab9c111

Don't print ulp_sdioctrl get error as errors are expected for non ulp cases. Signed-off-by: Naveen Gupta <nagu@cypress.com>

brcmfmac: Remove WOWL configuration in disconnect state

0d9171a

Set wowl configuration in disconnect state is redundant. Remove it to fix no scan result issue after resume. Signed-off-by: Lo-Hsiang Lo <double.lo@cypress.com>

RobertCNelson and others added 12 commits August 24, 2020 18:18

adihdmi_drv: reg_default -> reg_sequence

3455f5e

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

adihdmi_drv fix drm_of.h include

7e76e7c

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

of: overlay: remove sysfs_create_groups call

197929c

This crashes the kernel when an runtime overlay is applied.

bootup hacks: move mmc early

ecdccc6

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

bootup-hacks: xor select neon or arm4regs

45495e3

already default on BBB/X15, just calcuated everybootup Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

backports: bindeb-pkg: from: linux.git

1e2e3bc

Reference: v5.2.21 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

builddeb: Install our dtbs under /boot/dtbs/$version

82c9d8e

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

enable: Jenkins: http://gfnd.rcn-ee.org:8080

8d5761d

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

4.14.108-ti-r137 patchset

5394683

RobertCNelson force-pushed the 4.14 branch from 2a8a6a1 to d997583 Compare August 24, 2020 23:19

jadonk reviewed Aug 25, 2020

View reviewed changes

deebot force-pushed the rpmsg-gpiodrv branch 4 times, most recently from 66cbf64 to 4cc8ca9 Compare August 26, 2020 15:35

- Added driver to use rpmsg with gpiochip interface.Requires PRU firm…

265bf93

…ware Please follow instructions to load PRU firmware https://github.com/deebot/Beaglebone-BidirectionBus/blob/dev/bidirec_299/README.md - Added rule to compile rpmsg-gpio driver in Make and Kconfig

deebot force-pushed the rpmsg-gpiodrv branch from 5aa4cb4 to 265bf93 Compare August 26, 2020 16:29

RobertCNelson added a commit to RobertCNelson/ti-linux-kernel-dev that referenced this pull request Sep 9, 2020

merge: Rpmsg gpiodrv

ec94960

fixes: beagleboard/linux#247 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

RobertCNelson added a commit to RobertCNelson/ti-linux-kernel-dev that referenced this pull request Sep 9, 2020

merge: Rpmsg gpiodrv

92e50c0

fixes: beagleboard/linux#247 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

RobertCNelson force-pushed the 4.14 branch 2 times, most recently from cf8aa20 to 6ab314d Compare March 18, 2021 19:07

RobertCNelson force-pushed the 4.14 branch from 6ab314d to c807c37 Compare March 30, 2021 23:18

RobertCNelson force-pushed the 4.14 branch from c807c37 to 1222992 Compare May 13, 2021 22:16

RobertCNelson force-pushed the 4.14 branch 2 times, most recently from bf0870f to 36b21ce Compare May 27, 2021 19:54

RobertCNelson force-pushed the 4.14 branch from 36b21ce to 19af92a Compare December 23, 2021 23:45

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Rpmsg gpiodrv #247

Rpmsg gpiodrv #247

deebot commented Aug 23, 2020

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RobertCNelson commented Aug 25, 2020

Rpmsg gpiodrv #247

Are you sure you want to change the base?

Rpmsg gpiodrv #247

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RobertCNelson commented Aug 25, 2020

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edited

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edited