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authorArnd Bergmann <arnd@arndb.de>2014-05-24 00:45:58 +0200
committerArnd Bergmann <arnd@arndb.de>2014-05-24 00:46:05 +0200
commit34b16f74ebfb586d97e90bdb72f369aa5d8f16a1 (patch)
treec5c8e78ff361ab50bf98f8c0fa35c57d8506ffae /drivers
parentefca0a3e85045da839320d7c5121f82d55be8b79 (diff)
parent5d144e36b7c51612922fa05d37ff3a869261cc82 (diff)
downloadblackbird-op-linux-34b16f74ebfb586d97e90bdb72f369aa5d8f16a1.tar.gz
blackbird-op-linux-34b16f74ebfb586d97e90bdb72f369aa5d8f16a1.zip
Merge tag 'qcom-drivers-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/linux-qcom into next/drivers
Qualcomm ARM Based driver Updates for v3.16 * Introduce drivers/soc directory for misc SoC specific code * Add driver to configure GSBI device * tag 'qcom-drivers-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/linux-qcom: soc: qcom: Add GSBI driver soc: Introduce drivers/soc place-holder for SOC specific drivers Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/Kconfig2
-rw-r--r--drivers/Makefile3
-rw-r--r--drivers/soc/Kconfig5
-rw-r--r--drivers/soc/Makefile5
-rw-r--r--drivers/soc/qcom/Kconfig11
-rw-r--r--drivers/soc/qcom/Makefile1
-rw-r--r--drivers/soc/qcom/qcom_gsbi.c84
7 files changed, 111 insertions, 0 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig
index 0a0a90f52d26..0e87a34b6472 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -132,6 +132,8 @@ source "drivers/staging/Kconfig"
source "drivers/platform/Kconfig"
+source "drivers/soc/Kconfig"
+
source "drivers/clk/Kconfig"
source "drivers/hwspinlock/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index d05d81b19b50..e0c64454b96d 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -33,6 +33,9 @@ obj-y += amba/
# really early.
obj-$(CONFIG_DMADEVICES) += dma/
+# SOC specific infrastructure drivers.
+obj-y += soc/
+
obj-$(CONFIG_VIRTIO) += virtio/
obj-$(CONFIG_XEN) += xen/
diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
new file mode 100644
index 000000000000..c8543855aa82
--- /dev/null
+++ b/drivers/soc/Kconfig
@@ -0,0 +1,5 @@
+menu "SOC (System On Chip) specific Drivers"
+
+source "drivers/soc/qcom/Kconfig"
+
+endmenu
diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile
new file mode 100644
index 000000000000..0f7c44793b29
--- /dev/null
+++ b/drivers/soc/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the Linux Kernel SOC specific device drivers.
+#
+
+obj-$(CONFIG_ARCH_QCOM) += qcom/
diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
new file mode 100644
index 000000000000..7bd2c94f54a4
--- /dev/null
+++ b/drivers/soc/qcom/Kconfig
@@ -0,0 +1,11 @@
+#
+# QCOM Soc drivers
+#
+config QCOM_GSBI
+ tristate "QCOM General Serial Bus Interface"
+ depends on ARCH_QCOM
+ help
+ Say y here to enable GSBI support. The GSBI provides control
+ functions for connecting the underlying serial UART, SPI, and I2C
+ devices to the output pins.
+
diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
new file mode 100644
index 000000000000..438901257ac1
--- /dev/null
+++ b/drivers/soc/qcom/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_QCOM_GSBI) += qcom_gsbi.o
diff --git a/drivers/soc/qcom/qcom_gsbi.c b/drivers/soc/qcom/qcom_gsbi.c
new file mode 100644
index 000000000000..061dd0632dbd
--- /dev/null
+++ b/drivers/soc/qcom/qcom_gsbi.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2014, The Linux foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License rev 2 and
+ * only rev 2 as published by the free Software foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or fITNESS fOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+#define GSBI_CTRL_REG 0x0000
+#define GSBI_PROTOCOL_SHIFT 4
+
+static int gsbi_probe(struct platform_device *pdev)
+{
+ struct device_node *node = pdev->dev.of_node;
+ struct resource *res;
+ void __iomem *base;
+ struct clk *hclk;
+ u32 mode, crci = 0;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ if (of_property_read_u32(node, "qcom,mode", &mode)) {
+ dev_err(&pdev->dev, "missing mode configuration\n");
+ return -EINVAL;
+ }
+
+ /* not required, so default to 0 if not present */
+ of_property_read_u32(node, "qcom,crci", &crci);
+
+ dev_info(&pdev->dev, "GSBI port protocol: %d crci: %d\n", mode, crci);
+
+ hclk = devm_clk_get(&pdev->dev, "iface");
+ if (IS_ERR(hclk))
+ return PTR_ERR(hclk);
+
+ clk_prepare_enable(hclk);
+
+ writel_relaxed((mode << GSBI_PROTOCOL_SHIFT) | crci,
+ base + GSBI_CTRL_REG);
+
+ /* make sure the gsbi control write is not reordered */
+ wmb();
+
+ clk_disable_unprepare(hclk);
+
+ return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
+}
+
+static const struct of_device_id gsbi_dt_match[] = {
+ { .compatible = "qcom,gsbi-v1.0.0", },
+};
+
+MODULE_DEVICE_TABLE(of, gsbi_dt_match);
+
+static struct platform_driver gsbi_driver = {
+ .driver = {
+ .name = "gsbi",
+ .owner = THIS_MODULE,
+ .of_match_table = gsbi_dt_match,
+ },
+ .probe = gsbi_probe,
+};
+
+module_platform_driver(gsbi_driver);
+
+MODULE_AUTHOR("Andy Gross <agross@codeaurora.org>");
+MODULE_DESCRIPTION("QCOM GSBI driver");
+MODULE_LICENSE("GPL v2");
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