This change adds a Qualcomm GENI SE QUP device driver as a wrapper for
actually enabled and used serial devices found on a board.
At the moment the driver is pretty simple, its intention is to populate
childred devices and provide I/O mem read interface to them as clients,
this is needed for GENI UART driver to set up a proper clock divider
and provide the actually asked baud rate.
Signed-off-by: Vladimir Zapolskiy <vladimir.zapols...@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dyb...@linaro.org>
---
drivers/misc/Kconfig | 7 +++++++
drivers/misc/Makefile | 1 +
drivers/misc/qcom-geni-se.c | 41 +++++++++++++++++++++++++++++++++++++
3 files changed, 49 insertions(+)
create mode 100644 drivers/misc/qcom-geni-se.c
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 4e1ae03e9fd4..04460f1acb25 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -511,6 +511,13 @@ config WINBOND_W83627
legacy UART or other devices in the Winbond Super IO chips
on X86 platforms.
+config QCOM_GENI_SE
+ bool "Qualcomm GENI Serial Engine Driver"
+ depends on ARCH_SNAPDRAGON
+ help
+ The driver manages Generic Interface (GENI) firmware based
+ Qualcomm Technologies, Inc. Universal Peripheral (QUP) Wrapper.
+
config QFW
bool
help
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 3b792f2a14ce..52aed096021f 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -60,6 +60,7 @@ obj-$(CONFIG_NUVOTON_NCT6102D) += nuvoton_nct6102d.o
obj-$(CONFIG_P2SB) += p2sb-uclass.o
obj-$(CONFIG_PCA9551_LED) += pca9551_led.o
obj-$(CONFIG_$(SPL_)PWRSEQ) += pwrseq-uclass.o
+obj-$(CONFIG_QCOM_GENI_SE) += qcom-geni-se.o
ifdef CONFIG_QFW
obj-y += qfw.o
obj-$(CONFIG_QFW_PIO) += qfw_pio.o
diff --git a/drivers/misc/qcom-geni-se.c b/drivers/misc/qcom-geni-se.c
new file mode 100644
index 000000000000..b1443ad66d26
--- /dev/null
+++ b/drivers/misc/qcom-geni-se.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Qualcomm Generic Interface (GENI) Serial Engine (SE) Wrapper
+ *
+ * Copyright (C) 2023 Linaro Ltd. <vladimir.zapols...@linaro.org>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <misc.h>
+#include <asm/io.h>
+
+static int geni_se_qup_read(struct udevice *dev, int offset,
+ void *buf, int size)
+{
+ fdt_addr_t base = dev_read_addr(dev);
+
+ if (size != sizeof(u32))
+ return -EINVAL;
+
+ *(u32 *)buf = readl(base + offset);
+
+ return 0;
+}
+
+static struct misc_ops geni_se_qup_ops = {
+ .read = geni_se_qup_read,
+};
+
+static const struct udevice_id geni_se_qup_ids[] = {
+ { .compatible = "qcom,geni-se-qup" },
+ {}
+};
+
+U_BOOT_DRIVER(geni_se_qup) = {
+ .name = "geni_se_qup",
+ .id = UCLASS_MISC,
+ .of_match = geni_se_qup_ids,
+ .ops = &geni_se_qup_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+};
--
2.33.0
