diff options
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/Kconfig | 7 | ||||
| -rw-r--r-- | samples/Makefile | 1 | ||||
| -rw-r--r-- | samples/bpf/tcp_basertt_kern.c | 2 | ||||
| -rw-r--r-- | samples/bpf/xdp1_kern.c | 2 | ||||
| -rw-r--r-- | samples/bpf/xdp2_kern.c | 2 | ||||
| -rw-r--r-- | samples/fprobe/fprobe_example.c | 6 | ||||
| -rw-r--r-- | samples/kmemleak/kmemleak-test.c | 2 | ||||
| -rw-r--r-- | samples/pfsm/.gitignore | 2 | ||||
| -rw-r--r-- | samples/pfsm/Makefile | 4 | ||||
| -rw-r--r-- | samples/pfsm/pfsm-wakeup.c | 125 |
10 files changed, 147 insertions, 6 deletions
diff --git a/samples/Kconfig b/samples/Kconfig index b2db430bd3ff..bf49ed0d7362 100644 --- a/samples/Kconfig +++ b/samples/Kconfig @@ -253,6 +253,13 @@ config SAMPLE_INTEL_MEI help Build a sample program to work with mei device. +config SAMPLE_TPS6594_PFSM + bool "Build example program working with TPS6594 PFSM driver" + depends on HEADERS_INSTALL + depends on CC_CAN_LINK + help + Build a sample program to work with PFSM devices. + config SAMPLE_WATCHDOG bool "watchdog sample" depends on CC_CAN_LINK diff --git a/samples/Makefile b/samples/Makefile index 7727f1a0d6d1..0a551c2b33f4 100644 --- a/samples/Makefile +++ b/samples/Makefile @@ -31,6 +31,7 @@ obj-$(CONFIG_VIDEO_PCI_SKELETON) += v4l/ obj-y += vfio-mdev/ subdir-$(CONFIG_SAMPLE_VFS) += vfs obj-$(CONFIG_SAMPLE_INTEL_MEI) += mei/ +obj-$(CONFIG_SAMPLE_TPS6594_PFSM) += pfsm/ subdir-$(CONFIG_SAMPLE_WATCHDOG) += watchdog subdir-$(CONFIG_SAMPLE_WATCH_QUEUE) += watch_queue obj-$(CONFIG_SAMPLE_KMEMLEAK) += kmemleak/ diff --git a/samples/bpf/tcp_basertt_kern.c b/samples/bpf/tcp_basertt_kern.c index 8dfe09a92fec..822b0742b815 100644 --- a/samples/bpf/tcp_basertt_kern.c +++ b/samples/bpf/tcp_basertt_kern.c @@ -47,7 +47,7 @@ int bpf_basertt(struct bpf_sock_ops *skops) case BPF_SOCK_OPS_BASE_RTT: n = bpf_getsockopt(skops, SOL_TCP, TCP_CONGESTION, cong, sizeof(cong)); - if (!n && !__builtin_memcmp(cong, nv, sizeof(nv)+1)) { + if (!n && !__builtin_memcmp(cong, nv, sizeof(nv))) { /* Set base_rtt to 80us */ rv = 80; } else if (n) { diff --git a/samples/bpf/xdp1_kern.c b/samples/bpf/xdp1_kern.c index 0a5c704badd0..d91f27cbcfa9 100644 --- a/samples/bpf/xdp1_kern.c +++ b/samples/bpf/xdp1_kern.c @@ -39,7 +39,7 @@ static int parse_ipv6(void *data, u64 nh_off, void *data_end) return ip6h->nexthdr; } -#define XDPBUFSIZE 64 +#define XDPBUFSIZE 60 SEC("xdp.frags") int xdp_prog1(struct xdp_md *ctx) { diff --git a/samples/bpf/xdp2_kern.c b/samples/bpf/xdp2_kern.c index 67804ecf7ce3..8bca674451ed 100644 --- a/samples/bpf/xdp2_kern.c +++ b/samples/bpf/xdp2_kern.c @@ -55,7 +55,7 @@ static int parse_ipv6(void *data, u64 nh_off, void *data_end) return ip6h->nexthdr; } -#define XDPBUFSIZE 64 +#define XDPBUFSIZE 60 SEC("xdp.frags") int xdp_prog1(struct xdp_md *ctx) { diff --git a/samples/fprobe/fprobe_example.c b/samples/fprobe/fprobe_example.c index 4efc8feb6277..64e715e7ed11 100644 --- a/samples/fprobe/fprobe_example.c +++ b/samples/fprobe/fprobe_example.c @@ -49,6 +49,7 @@ static void show_backtrace(void) } static int sample_entry_handler(struct fprobe *fp, unsigned long ip, + unsigned long ret_ip, struct pt_regs *regs, void *data) { if (use_trace) @@ -65,10 +66,11 @@ static int sample_entry_handler(struct fprobe *fp, unsigned long ip, return 0; } -static void sample_exit_handler(struct fprobe *fp, unsigned long ip, struct pt_regs *regs, +static void sample_exit_handler(struct fprobe *fp, unsigned long ip, + unsigned long ret_ip, struct pt_regs *regs, void *data) { - unsigned long rip = instruction_pointer(regs); + unsigned long rip = ret_ip; if (use_trace) /* diff --git a/samples/kmemleak/kmemleak-test.c b/samples/kmemleak/kmemleak-test.c index 7b476eb8285f..6ced5ddd99d4 100644 --- a/samples/kmemleak/kmemleak-test.c +++ b/samples/kmemleak/kmemleak-test.c @@ -32,7 +32,7 @@ static DEFINE_PER_CPU(void *, kmemleak_test_pointer); * Some very simple testing. This function needs to be extended for * proper testing. */ -static int __init kmemleak_test_init(void) +static int kmemleak_test_init(void) { struct test_node *elem; int i; diff --git a/samples/pfsm/.gitignore b/samples/pfsm/.gitignore new file mode 100644 index 000000000000..f350a030a060 --- /dev/null +++ b/samples/pfsm/.gitignore @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +/pfsm-wakeup diff --git a/samples/pfsm/Makefile b/samples/pfsm/Makefile new file mode 100644 index 000000000000..213e8d9f5dbc --- /dev/null +++ b/samples/pfsm/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0 +userprogs-always-y += pfsm-wakeup + +userccflags += -I usr/include diff --git a/samples/pfsm/pfsm-wakeup.c b/samples/pfsm/pfsm-wakeup.c new file mode 100644 index 000000000000..299dd9e1f607 --- /dev/null +++ b/samples/pfsm/pfsm-wakeup.c @@ -0,0 +1,125 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * TPS6594 PFSM userspace example + * + * Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/ + * + * This example shows how to use PFSMs from a userspace application, + * on TI j721s2 platform. The PMIC is armed to be triggered by a RTC + * alarm to execute state transition (RETENTION to ACTIVE). + */ + +#include <fcntl.h> +#include <stdio.h> +#include <sys/ioctl.h> +#include <unistd.h> + +#include <linux/rtc.h> +#include <linux/tps6594_pfsm.h> + +#define ALARM_DELTA_SEC 30 + +#define RTC_A "/dev/rtc0" + +#define PMIC_NB 3 +#define PMIC_A "/dev/pfsm-0-0x48" +#define PMIC_B "/dev/pfsm-0-0x4c" +#define PMIC_C "/dev/pfsm-2-0x58" + +static const char * const dev_pfsm[] = {PMIC_A, PMIC_B, PMIC_C}; + +int main(int argc, char *argv[]) +{ + int i, ret, fd_rtc, fd_pfsm[PMIC_NB] = { 0 }; + struct rtc_time rtc_tm; + struct pmic_state_opt pmic_opt = { 0 }; + unsigned long data; + + fd_rtc = open(RTC_A, O_RDONLY); + if (fd_rtc < 0) { + perror("Failed to open RTC device."); + goto out; + } + + for (i = 0 ; i < PMIC_NB ; i++) { + fd_pfsm[i] = open(dev_pfsm[i], O_RDWR); + if (fd_pfsm[i] < 0) { + perror("Failed to open PFSM device."); + goto out; + } + } + + /* Read RTC date/time */ + ret = ioctl(fd_rtc, RTC_RD_TIME, &rtc_tm); + if (ret < 0) { + perror("Failed to read RTC date/time."); + goto out; + } + printf("Current RTC date/time is %d-%d-%d, %02d:%02d:%02d.\n", + rtc_tm.tm_mday, rtc_tm.tm_mon + 1, rtc_tm.tm_year + 1900, + rtc_tm.tm_hour, rtc_tm.tm_min, rtc_tm.tm_sec); + + /* Set RTC alarm to ALARM_DELTA_SEC sec in the future, and check for rollover */ + rtc_tm.tm_sec += ALARM_DELTA_SEC; + if (rtc_tm.tm_sec >= 60) { + rtc_tm.tm_sec %= 60; + rtc_tm.tm_min++; + } + if (rtc_tm.tm_min == 60) { + rtc_tm.tm_min = 0; + rtc_tm.tm_hour++; + } + if (rtc_tm.tm_hour == 24) + rtc_tm.tm_hour = 0; + ret = ioctl(fd_rtc, RTC_ALM_SET, &rtc_tm); + if (ret < 0) { + perror("Failed to set RTC alarm."); + goto out; + } + + /* Enable alarm interrupts */ + ret = ioctl(fd_rtc, RTC_AIE_ON, 0); + if (ret < 0) { + perror("Failed to enable alarm interrupts."); + goto out; + } + printf("Waiting %d seconds for alarm...\n", ALARM_DELTA_SEC); + + /* + * Set RETENTION state with options for PMIC_C/B/A respectively. + * Since PMIC_A is master, it should be the last one to be configured. + */ + pmic_opt.ddr_retention = 1; + for (i = PMIC_NB - 1 ; i >= 0 ; i--) { + printf("Set RETENTION state for PMIC_%d.\n", i); + sleep(1); + ret = ioctl(fd_pfsm[i], PMIC_SET_RETENTION_STATE, &pmic_opt); + if (ret < 0) { + perror("Failed to set RETENTION state."); + goto out_reset; + } + } + + /* This blocks until the alarm ring causes an interrupt */ + ret = read(fd_rtc, &data, sizeof(unsigned long)); + if (ret < 0) + perror("Failed to get RTC alarm."); + else + puts("Alarm rang.\n"); + +out_reset: + ioctl(fd_rtc, RTC_AIE_OFF, 0); + + /* Set ACTIVE state for PMIC_A */ + ioctl(fd_pfsm[0], PMIC_SET_ACTIVE_STATE, 0); + +out: + for (i = 0 ; i < PMIC_NB ; i++) + if (fd_pfsm[i]) + close(fd_pfsm[i]); + + if (fd_rtc) + close(fd_rtc); + + return 0; +} |