10 files changed, 95 insertions, 18 deletions

diff --git a/Documentation/devicetree/bindings/spi/sh-msiof.txt b/Documentation/devicetree/bindings/spi/sh-msiof.txt
index 64ee489571c4..39e5ef7c5e71 100644
--- a/Documentation/devicetree/bindings/spi/sh-msiof.txt
+++ b/Documentation/devicetree/bindings/spi/sh-msiof.txt
@@ -6,6 +6,7 @@ Required properties:
                          "renesas,msiof-r8a7792" (R-Car V2H)
                          "renesas,msiof-r8a7793" (R-Car M2-N)
                          "renesas,msiof-r8a7794" (R-Car E2)
+                         "renesas,msiof-r8a7795" (R-Car H3)
                          "renesas,msiof-r8a7796" (R-Car M3-W)
                          "renesas,msiof-sh73a0" (SH-Mobile AG5)
                          "renesas,sh-mobile-msiof" (generic SH-Mobile compatibile device)
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index c304c7167866..0eb1e9583485 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -38,6 +38,7 @@ struct sh_msiof_chipdata {
         u16 tx_fifo_size;
         u16 rx_fifo_size;
         u16 master_flags;
+        u16 min_div;
 };
 
 struct sh_msiof_spi_priv {
@@ -49,6 +50,7 @@ struct sh_msiof_spi_priv {
         struct completion done;
         unsigned int tx_fifo_size;
         unsigned int rx_fifo_size;
+        unsigned int min_div;
         void *tx_dma_page;
         void *rx_dma_page;
         dma_addr_t tx_dma_addr;
@@ -261,6 +263,8 @@ static void sh_msiof_spi_set_clk_regs(struct sh_msiof_spi_priv *p,
         if (!WARN_ON(!spi_hz || !parent_rate))
                 div = DIV_ROUND_UP(parent_rate, spi_hz);
 
+        div = max_t(unsigned long, div, p->min_div);
+
         for (k = 0; k < ARRAY_SIZE(sh_msiof_spi_div_table); k++) {
                 brps = DIV_ROUND_UP(div, sh_msiof_spi_div_table[k].div);
                 /* SCR_BRDV_DIV_1 is valid only if BRPS is x 1/1 or x 1/2 */
@@ -998,24 +1002,33 @@ static const struct sh_msiof_chipdata sh_data = {
         .tx_fifo_size = 64,
         .rx_fifo_size = 64,
         .master_flags = 0,
+        .min_div = 1,
+};
+
+static const struct sh_msiof_chipdata rcar_gen2_data = {
+        .tx_fifo_size = 64,
+        .rx_fifo_size = 64,
+        .master_flags = SPI_MASTER_MUST_TX,
+        .min_div = 1,
 };
 
-static const struct sh_msiof_chipdata r8a779x_data = {
+static const struct sh_msiof_chipdata rcar_gen3_data = {
         .tx_fifo_size = 64,
         .rx_fifo_size = 64,
         .master_flags = SPI_MASTER_MUST_TX,
+        .min_div = 2,
 };
 
 static const struct of_device_id sh_msiof_match[] = {
         { .compatible = "renesas,sh-mobile-msiof", .data = &sh_data },
-        { .compatible = "renesas,msiof-r8a7790",   .data = &r8a779x_data },
-        { .compatible = "renesas,msiof-r8a7791",   .data = &r8a779x_data },
-        { .compatible = "renesas,msiof-r8a7792",   .data = &r8a779x_data },
-        { .compatible = "renesas,msiof-r8a7793",   .data = &r8a779x_data },
-        { .compatible = "renesas,msiof-r8a7794",   .data = &r8a779x_data },
-        { .compatible = "renesas,rcar-gen2-msiof", .data = &r8a779x_data },
-        { .compatible = "renesas,msiof-r8a7796",   .data = &r8a779x_data },
-        { .compatible = "renesas,rcar-gen3-msiof", .data = &r8a779x_data },
+        { .compatible = "renesas,msiof-r8a7790",   .data = &rcar_gen2_data },
+        { .compatible = "renesas,msiof-r8a7791",   .data = &rcar_gen2_data },
+        { .compatible = "renesas,msiof-r8a7792",   .data = &rcar_gen2_data },
+        { .compatible = "renesas,msiof-r8a7793",   .data = &rcar_gen2_data },
+        { .compatible = "renesas,msiof-r8a7794",   .data = &rcar_gen2_data },
+        { .compatible = "renesas,rcar-gen2-msiof", .data = &rcar_gen2_data },
+        { .compatible = "renesas,msiof-r8a7796",   .data = &rcar_gen3_data },
+        { .compatible = "renesas,rcar-gen3-msiof", .data = &rcar_gen3_data },
         { .compatible = "renesas,sh-msiof",        .data = &sh_data }, /* Deprecated */
         {},
 };
@@ -1230,6 +1243,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev)
         platform_set_drvdata(pdev, p);
         p->master = master;
         p->info = info;
+        p->min_div = chipdata->min_div;
 
         init_completion(&p->done);
 
diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index 75644bcd938b..680cdf549506 100644
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -1132,7 +1132,7 @@ static int stm32_spi_probe(struct platform_device *pdev)
                 goto err_master_put;
         }
 
-        spi->rst = devm_reset_control_get(&pdev->dev, NULL);
+        spi->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
         if (!IS_ERR(spi->rst)) {
                 reset_control_assert(spi->rst);
                 udelay(2);
diff --git a/drivers/spi/spi-sun6i.c b/drivers/spi/spi-sun6i.c
index 03a773a9531a..fb38234249a8 100644
--- a/drivers/spi/spi-sun6i.c
+++ b/drivers/spi/spi-sun6i.c
@@ -502,7 +502,7 @@ static int sun6i_spi_probe(struct platform_device *pdev)
 
         init_completion(&sspi->done);
 
-        sspi->rstc = devm_reset_control_get(&pdev->dev, NULL);
+        sspi->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
         if (IS_ERR(sspi->rstc)) {
                 dev_err(&pdev->dev, "Couldn't get reset controller\n");
                 ret = PTR_ERR(sspi->rstc);
diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c
index 08012ae5aa66..44550182a4a3 100644
--- a/drivers/spi/spi-tegra114.c
+++ b/drivers/spi/spi-tegra114.c
@@ -1083,7 +1083,7 @@ static int tegra_spi_probe(struct platform_device *pdev)
                 goto exit_free_irq;
         }
 
-        tspi->rst = devm_reset_control_get(&pdev->dev, "spi");
+        tspi->rst = devm_reset_control_get_exclusive(&pdev->dev, "spi");
         if (IS_ERR(tspi->rst)) {
                 dev_err(&pdev->dev, "can not get reset\n");
                 ret = PTR_ERR(tspi->rst);
diff --git a/drivers/spi/spi-tegra20-sflash.c b/drivers/spi/spi-tegra20-sflash.c
index 2c797ee2664d..22893a7e0aa0 100644
--- a/drivers/spi/spi-tegra20-sflash.c
+++ b/drivers/spi/spi-tegra20-sflash.c
@@ -485,7 +485,7 @@ static int tegra_sflash_probe(struct platform_device *pdev)
                 goto exit_free_irq;
         }
 
-        tsd->rst = devm_reset_control_get(&pdev->dev, "spi");
+        tsd->rst = devm_reset_control_get_exclusive(&pdev->dev, "spi");
         if (IS_ERR(tsd->rst)) {
                 dev_err(&pdev->dev, "can not get reset\n");
                 ret = PTR_ERR(tsd->rst);
diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index 0c06ce424210..3e12d5f87ee4 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -1081,7 +1081,7 @@ static int tegra_slink_probe(struct platform_device *pdev)
                 goto exit_free_irq;
         }
 
-        tspi->rst = devm_reset_control_get(&pdev->dev, "spi");
+        tspi->rst = devm_reset_control_get_exclusive(&pdev->dev, "spi");
         if (IS_ERR(tspi->rst)) {
                 dev_err(&pdev->dev, "can not get reset\n");
                 ret = PTR_ERR(tspi->rst);
diff --git a/tools/Makefile b/tools/Makefile
index 221e1ce78b06..616e7722b327 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -91,7 +91,7 @@ kvm_stat: FORCE
         $(call descend,kvm/$@)
 
 all: acpi cgroup cpupower gpio hv firewire lguest liblockdep \
-                perf selftests turbostat usb \
+                perf selftests spi turbostat usb \
                 virtio vm net x86_energy_perf_policy \
                 tmon freefall objtool kvm_stat
 
@@ -101,7 +101,7 @@ acpi_install:
 cpupower_install:
         $(call descend,power/$(@:_install=),install)
 
-cgroup_install firewire_install gpio_install hv_install lguest_install perf_install usb_install virtio_install vm_install net_install objtool_install:
+cgroup_install firewire_install gpio_install hv_install lguest_install perf_install spi_install usb_install virtio_install vm_install net_install objtool_install:
         $(call descend,$(@:_install=),install)
 
 liblockdep_install:
diff --git a/tools/spi/Build b/tools/spi/Build
new file mode 100644
index 000000000000..8e8466033d99
--- /dev/null
+++ b/tools/spi/Build
@@ -0,0 +1,2 @@
+spidev_test-y += spidev_test.o
+spidev_fdx-y += spidev_fdx.o
diff --git a/tools/spi/Makefile b/tools/spi/Makefile
index 3815b18ba070..90615e10c79a 100644
--- a/tools/spi/Makefile
+++ b/tools/spi/Makefile
@@ -1,6 +1,66 @@
+include ../scripts/Makefile.include
+
+bindir ?= /usr/bin
+
+ifeq ($(srctree),)
+srctree := $(patsubst %/,%,$(dir $(CURDIR)))
+srctree := $(patsubst %/,%,$(dir $(srctree)))
+endif
+
+# Do not use make's built-in rules
+# (this improves performance and avoids hard-to-debug behaviour);
+MAKEFLAGS += -r
+
 CC = $(CROSS_COMPILE)gcc
+LD = $(CROSS_COMPILE)ld
+CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include
+
+ALL_TARGETS := spidev_test spidev_fdx
+ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS))
+
+all: $(ALL_PROGRAMS)
+
+export srctree OUTPUT CC LD CFLAGS
+include $(srctree)/tools/build/Makefile.include
 
-all: spidev_test spidev_fdx
+#
+# We need the following to be outside of kernel tree
+#
+$(OUTPUT)include/linux/spi/spidev.h: ../../include/uapi/linux/spi/spidev.h
+        mkdir -p $(OUTPUT)include/linux/spi 2>&1 || true
+        ln -sf $(CURDIR)/../../include/uapi/linux/spi/spidev.h $@
+
+prepare: $(OUTPUT)include/linux/spi/spidev.h
+
+#
+# spidev_test
+#
+SPIDEV_TEST_IN := $(OUTPUT)spidev_test-in.o
+$(SPIDEV_TEST_IN): prepare FORCE
+        $(Q)$(MAKE) $(build)=spidev_test
+$(OUTPUT)spidev_test: $(SPIDEV_TEST_IN)
+        $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
+
+#
+# spidev_fdx
+#
+SPIDEV_FDX_IN := $(OUTPUT)spidev_fdx-in.o
+$(SPIDEV_FDX_IN): prepare FORCE
+        $(Q)$(MAKE) $(build)=spidev_fdx
+$(OUTPUT)spidev_fdx: $(SPIDEV_FDX_IN)
+        $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
 
 clean:
-        $(RM) spidev_test spidev_fdx
+        rm -f $(ALL_PROGRAMS)
+        rm -f $(OUTPUT)include/linux/spi/spidev.h
+        find $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -delete
+
+install: $(ALL_PROGRAMS)
+        install -d -m 755 $(DESTDIR)$(bindir);          \
+        for program in $(ALL_PROGRAMS); do              \
+                install $$program $(DESTDIR)$(bindir);  \
+        done
+
+FORCE:
+
+.PHONY: all install clean FORCE prepare