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kernel: support watchdog (and so reboot) on BCM53573

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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
This commit is contained in:
Rafał Miłecki 2016-08-16 16:53:11 +02:00
parent 528b769d42
commit 09b9dd730c
1 changed files with 104 additions and 0 deletions
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104
target/linux/generic/patches-4.4/180-bcma-support-BCM53573-series-of-wireless-SoCs.patch Normal file
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@ -0,0 +1,104 @@
From 78921f39c6495203bbbf4207c442c2b59f8f11c0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
Date: Mon, 25 Jul 2016 18:03:17 +0200
Subject: [PATCH] bcma: support BCM53573 series of wireless SoCs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
BCM53573 seems to be the first series of Northstar family with wireless
on the chip. The base models are BCM53573-s (A0, A1) and there is also
BCM47189B0 which seems to be some small modification.
The only problem with these chipsets seems to be watchdog. It's totally
unavailable on 53573A0 / 53573A1 and preferable PMU watchdog is broken
on 53573B0 / 53573B1.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
---
drivers/bcma/driver_chipcommon.c | 32 +++++++++++++++++++++++++++++---
include/linux/bcma/bcma.h | 3 +++
2 files changed, 32 insertions(+), 3 deletions(-)
--- a/drivers/bcma/driver_chipcommon.c
+++ b/drivers/bcma/driver_chipcommon.c
@@ -36,12 +36,31 @@ u32 bcma_chipco_get_alp_clock(struct bcm
}
EXPORT_SYMBOL_GPL(bcma_chipco_get_alp_clock);
+static bool bcma_core_cc_has_pmu_watchdog(struct bcma_drv_cc *cc)
+{
+ struct bcma_bus *bus = cc->core->bus;
+
+ if (cc->capabilities & BCMA_CC_CAP_PMU) {
+ if (bus->chipinfo.id == BCMA_CHIP_ID_BCM53573) {
+ WARN(bus->chipinfo.rev <= 1, "No watchdog available\n");
+ /* 53573B0 and 53573B1 have bugged PMU watchdog. It can
+ * be enabled but timer can't be bumped. Use CC one
+ * instead.
+ */
+ return false;
+ }
+ return true;
+ } else {
+ return false;
+ }
+}
+
static u32 bcma_chipco_watchdog_get_max_timer(struct bcma_drv_cc *cc)
{
struct bcma_bus *bus = cc->core->bus;
u32 nb;
- if (cc->capabilities & BCMA_CC_CAP_PMU) {
+ if (bcma_core_cc_has_pmu_watchdog(cc)) {
if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
nb = 32;
else if (cc->core->id.rev < 26)
@@ -95,9 +114,16 @@ static int bcma_chipco_watchdog_ticks_pe
int bcma_chipco_watchdog_register(struct bcma_drv_cc *cc)
{
+ struct bcma_bus *bus = cc->core->bus;
struct bcm47xx_wdt wdt = {};
struct platform_device *pdev;
+ if (bus->chipinfo.id == BCMA_CHIP_ID_BCM53573 &&
+ bus->chipinfo.rev <= 1) {
+ pr_debug("No watchdog on 53573A0 / 53573A1\n");
+ return 0;
+ }
+
wdt.driver_data = cc;
wdt.timer_set = bcma_chipco_watchdog_timer_set_wdt;
wdt.timer_set_ms = bcma_chipco_watchdog_timer_set_ms_wdt;
@@ -105,7 +131,7 @@ int bcma_chipco_watchdog_register(struct
bcma_chipco_watchdog_get_max_timer(cc) / cc->ticks_per_ms;
pdev = platform_device_register_data(NULL, "bcm47xx-wdt",
- cc->core->bus->num, &wdt,
+ bus->num, &wdt,
sizeof(wdt));
if (IS_ERR(pdev))
return PTR_ERR(pdev);
@@ -217,7 +243,7 @@ u32 bcma_chipco_watchdog_timer_set(struc
u32 maxt;
maxt = bcma_chipco_watchdog_get_max_timer(cc);
- if (cc->capabilities & BCMA_CC_CAP_PMU) {
+ if (bcma_core_cc_has_pmu_watchdog(cc)) {
if (ticks == 1)
ticks = 2;
else if (ticks > maxt)
--- a/include/linux/bcma/bcma.h
+++ b/include/linux/bcma/bcma.h
@@ -203,6 +203,9 @@ struct bcma_host_ops {
#define BCMA_PKG_ID_BCM4709 0
#define BCMA_CHIP_ID_BCM47094 53030
#define BCMA_CHIP_ID_BCM53018 53018
+#define BCMA_CHIP_ID_BCM53573 53573
+#define BCMA_PKG_ID_BCM53573 0
+#define BCMA_PKG_ID_BCM47189 1
/* Board types (on PCI usually equals to the subsystem dev id) */
/* BCM4313 */