[PATCH v3 1/7] spi: dw: Add a symbols namespace for the core module

[Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>]

The exported from the DW SPI driver core/DMA symbols are only used by the
spi-dw-{mmio,pci,bt1}.o objects. Add these symbols to a separate
namespace then and make sure the depended modules have it imported.

Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>
Suggested-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>

---

Changelog v2:
- This is a new patch created as of Andy' suggestion.

Changelog v3:
- Discard the symbols importing from the spi-dw-dma object since it's
  linked into the spi-dw-core module anyway thus having the same symbols
  namespace.
---
 drivers/spi/spi-dw-bt1.c  |  1 +
 drivers/spi/spi-dw-core.c | 14 +++++++-------
 drivers/spi/spi-dw-dma.c  |  5 +++--
 drivers/spi/spi-dw-mmio.c |  1 +
 drivers/spi/spi-dw-pci.c  |  1 +
 5 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/drivers/spi/spi-dw-bt1.c b/drivers/spi/spi-dw-bt1.c
index 5be6b7b80c21..ac7e4f30d1da 100644
--- a/drivers/spi/spi-dw-bt1.c
+++ b/drivers/spi/spi-dw-bt1.c
@@ -339,3 +339,4 @@ module_platform_driver(dw_spi_bt1_driver);
 MODULE_AUTHOR("Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>");
 MODULE_DESCRIPTION("Baikal-T1 System Boot SPI Controller driver");
 MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(SPI_DW_CORE);
diff --git a/drivers/spi/spi-dw-core.c b/drivers/spi/spi-dw-core.c
index a305074c482e..a14940403ab4 100644
--- a/drivers/spi/spi-dw-core.c
+++ b/drivers/spi/spi-dw-core.c
@@ -106,7 +106,7 @@ void dw_spi_set_cs(struct spi_device *spi, bool enable)
 	else
 		dw_writel(dws, DW_SPI_SER, 0);
 }
-EXPORT_SYMBOL_GPL(dw_spi_set_cs);
+EXPORT_SYMBOL_NS_GPL(dw_spi_set_cs, SPI_DW_CORE);
 
 /* Return the max entries we can fill into tx fifo */
 static inline u32 tx_max(struct dw_spi *dws)
@@ -210,7 +210,7 @@ int dw_spi_check_status(struct dw_spi *dws, bool raw)
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(dw_spi_check_status);
+EXPORT_SYMBOL_NS_GPL(dw_spi_check_status, SPI_DW_CORE);
 
 static irqreturn_t dw_spi_transfer_handler(struct dw_spi *dws)
 {
@@ -345,7 +345,7 @@ void dw_spi_update_config(struct dw_spi *dws, struct spi_device *spi,
 		dws->cur_rx_sample_dly = chip->rx_sample_dly;
 	}
 }
-EXPORT_SYMBOL_GPL(dw_spi_update_config);
+EXPORT_SYMBOL_NS_GPL(dw_spi_update_config, SPI_DW_CORE);
 
 static void dw_spi_irq_setup(struct dw_spi *dws)
 {
@@ -945,7 +945,7 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
 	spi_controller_put(master);
 	return ret;
 }
-EXPORT_SYMBOL_GPL(dw_spi_add_host);
+EXPORT_SYMBOL_NS_GPL(dw_spi_add_host, SPI_DW_CORE);
 
 void dw_spi_remove_host(struct dw_spi *dws)
 {
@@ -960,7 +960,7 @@ void dw_spi_remove_host(struct dw_spi *dws)
 
 	free_irq(dws->irq, dws->master);
 }
-EXPORT_SYMBOL_GPL(dw_spi_remove_host);
+EXPORT_SYMBOL_NS_GPL(dw_spi_remove_host, SPI_DW_CORE);
 
 int dw_spi_suspend_host(struct dw_spi *dws)
 {
@@ -973,14 +973,14 @@ int dw_spi_suspend_host(struct dw_spi *dws)
 	spi_shutdown_chip(dws);
 	return 0;
 }
-EXPORT_SYMBOL_GPL(dw_spi_suspend_host);
+EXPORT_SYMBOL_NS_GPL(dw_spi_suspend_host, SPI_DW_CORE);
 
 int dw_spi_resume_host(struct dw_spi *dws)
 {
 	spi_hw_init(&dws->master->dev, dws);
 	return spi_controller_resume(dws->master);
 }
-EXPORT_SYMBOL_GPL(dw_spi_resume_host);
+EXPORT_SYMBOL_NS_GPL(dw_spi_resume_host, SPI_DW_CORE);
 
 MODULE_AUTHOR("Feng Tang <feng.tang@xxxxxxxxx>");
 MODULE_DESCRIPTION("Driver for DesignWare SPI controller core");
diff --git a/drivers/spi/spi-dw-dma.c b/drivers/spi/spi-dw-dma.c
index a09831c62192..ca199eee0f13 100644
--- a/drivers/spi/spi-dw-dma.c
+++ b/drivers/spi/spi-dw-dma.c
@@ -10,6 +10,7 @@
 #include <linux/dmaengine.h>
 #include <linux/irqreturn.h>
 #include <linux/jiffies.h>
+#include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/platform_data/dma-dw.h>
 #include <linux/spi/spi.h>
@@ -638,7 +639,7 @@ void dw_spi_dma_setup_mfld(struct dw_spi *dws)
 {
 	dws->dma_ops = &dw_spi_dma_mfld_ops;
 }
-EXPORT_SYMBOL_GPL(dw_spi_dma_setup_mfld);
+EXPORT_SYMBOL_NS_GPL(dw_spi_dma_setup_mfld, SPI_DW_CORE);
 
 static const struct dw_spi_dma_ops dw_spi_dma_generic_ops = {
 	.dma_init	= dw_spi_dma_init_generic,
@@ -653,4 +654,4 @@ void dw_spi_dma_setup_generic(struct dw_spi *dws)
 {
 	dws->dma_ops = &dw_spi_dma_generic_ops;
 }
-EXPORT_SYMBOL_GPL(dw_spi_dma_setup_generic);
+EXPORT_SYMBOL_NS_GPL(dw_spi_dma_setup_generic, SPI_DW_CORE);
diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c
index 17c06039a74d..711f4d3404c5 100644
--- a/drivers/spi/spi-dw-mmio.c
+++ b/drivers/spi/spi-dw-mmio.c
@@ -377,3 +377,4 @@ module_platform_driver(dw_spi_mmio_driver);
 MODULE_AUTHOR("Jean-Hugues Deschenes <jean-hugues.deschenes@xxxxxxxxxxx>");
 MODULE_DESCRIPTION("Memory-mapped I/O interface driver for DW SPI Core");
 MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(SPI_DW_CORE);
diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c
index 8a91cd58102f..5552240fee55 100644
--- a/drivers/spi/spi-dw-pci.c
+++ b/drivers/spi/spi-dw-pci.c
@@ -213,3 +213,4 @@ module_pci_driver(dw_spi_driver);
 MODULE_AUTHOR("Feng Tang <feng.tang@xxxxxxxxx>");
 MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
 MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(SPI_DW_CORE);
-- 
2.33.0