Hi Robert,
On 23/04/2024 13:33, Robert Marko wrote:
Number of Qualcomm ARMv7 SoC-s did not use PSCI but rather used PSHOLD
(Qualcomm Power Supply Hold Reset) bit to trigger reset or poweroff.
Qualcomm IPQ40XX is one of them, so provide a simple sysreset driver based
on the upstream Linux one, it is DT compatible as well.
Thanks for the patch.
Signed-off-by: Robert Marko <robert.ma...@sartura.hr>
---
drivers/sysreset/Kconfig | 6 +++
drivers/sysreset/Makefile | 1 +
drivers/sysreset/sysreset_msm-pshold.c | 56 ++++++++++++++++++++++++++
3 files changed, 63 insertions(+)
create mode 100644 drivers/sysreset/sysreset_msm-pshold.c
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig
index 49c0787b26..30ff9e576d 100644
--- a/drivers/sysreset/Kconfig
+++ b/drivers/sysreset/Kconfig
@@ -235,6 +235,12 @@ config SYSRESET_RAA215300
help
Add support for the system reboot via the Renesas RAA215300 PMIC.
+config SYSRESET_MSM_PSHOLD
For the sake of consistency, please use QCOM instead of MSM (ditto for
the driver).
With that,
Reviewed-by: Caleb Connolly <caleb.conno...@linaro.org>
+ bool "Support sysreset for Qualcomm SoCs via PSHOLD"
+ depends on ARCH_IPQ40XX
+ help
+ Add support for the system reboot on Qualcomm SoCs via PSHOLD.
+
endif
endmenu
diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile
index e0e732205d..da61dca8e2 100644
--- a/drivers/sysreset/Makefile
+++ b/drivers/sysreset/Makefile
@@ -28,4 +28,5 @@ obj-$(CONFIG_SYSRESET_RESETCTL) += sysreset_resetctl.o
obj-$(CONFIG_$(SPL_TPL_)SYSRESET_AT91) += sysreset_at91.o
obj-$(CONFIG_$(SPL_TPL_)SYSRESET_X86) += sysreset_x86.o
obj-$(CONFIG_SYSRESET_RAA215300) += sysreset_raa215300.o
+obj-$(CONFIG_SYSRESET_MSM_PSHOLD) += sysreset_msm-pshold.o
obj-$(CONFIG_TARGET_XTFPGA) += sysreset_xtfpga.o
diff --git a/drivers/sysreset/sysreset_msm-pshold.c
b/drivers/sysreset/sysreset_msm-pshold.c
new file mode 100644
index 0000000000..d25a412954
--- /dev/null
+++ b/drivers/sysreset/sysreset_msm-pshold.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Qualcomm PSHOLD reset driver
+ *
+ * Copyright (c) 2024 Sartura Ltd.
+ *
+ * Author: Robert Marko <robert.ma...@sartura.hr>
+ * Based on the Linux msm-poweroff driver.
+ *
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <sysreset.h>
+#include <asm/io.h>
+#include <linux/delay.h>
+
+struct msm_pshold_priv {
+ phys_addr_t base;
+};
+
+static int msm_pshold_request(struct udevice *dev, enum sysreset_t type)
+{
+ struct msm_pshold_priv *priv = dev_get_priv(dev);
+
+ writel(0, priv->base);
+ mdelay(10000);
+
+ return 0;
+}
+
+static struct sysreset_ops msm_pshold_ops = {
+ .request = msm_pshold_request,
+};
+
+static int msm_pshold_probe(struct udevice *dev)
+{
+ struct msm_pshold_priv *priv = dev_get_priv(dev);
+
+ priv->base = dev_read_addr(dev);
+ return priv->base == FDT_ADDR_T_NONE ? -EINVAL : 0;
+}
+
+static const struct udevice_id msm_pshold_ids[] = {
+ { .compatible = "qcom,pshold", },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(msm_pshold) = {
+ .name = "msm_pshold",
+ .id = UCLASS_SYSRESET,
+ .of_match = msm_pshold_ids,
+ .probe = msm_pshold_probe,
+ .priv_auto = sizeof(struct msm_pshold_priv),
+ .ops = &msm_pshold_ops,
+};
--
// Caleb (they/them)
