ARM: shmobile: genmai legacy: Add RSPI support

Add RSPI platform device, resources, platform data, and SPI child.

On this board, only rspi4 is in use. Its bus contains a single device
(a wm8978 audio codec).

Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

1 files changed, 44 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/board-genmai.c b/arch/arm/mach-shmobile/board-genmai.c
index 3e92e3c62d4c..c4064610e223 100644
--- a/arch/arm/mach-shmobile/board-genmai.c
+++ b/arch/arm/mach-shmobile/board-genmai.c
@@ -20,15 +20,59 @@
 
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
+#include <linux/spi/rspi.h>
+#include <linux/spi/spi.h>
 #include <mach/common.h>
+#include <mach/irqs.h>
 #include <mach/r7s72100.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 
+/* RSPI */
+#define RSPI_RESOURCE(idx, baseaddr, irq)                               \
+static const struct resource rspi##idx##_resources[] __initconst = {    \
+        DEFINE_RES_MEM(baseaddr, 0x24),                                 \
+        DEFINE_RES_IRQ_NAMED(irq, "error"),                             \
+        DEFINE_RES_IRQ_NAMED(irq + 1, "rx"),                            \
+        DEFINE_RES_IRQ_NAMED(irq + 2, "tx"),                            \
+}
+
+RSPI_RESOURCE(0, 0xe800c800, gic_iid(270));
+RSPI_RESOURCE(1, 0xe800d000, gic_iid(273));
+RSPI_RESOURCE(2, 0xe800d800, gic_iid(276));
+RSPI_RESOURCE(3, 0xe800e000, gic_iid(279));
+RSPI_RESOURCE(4, 0xe800e800, gic_iid(282));
+
+static const struct rspi_plat_data rspi_pdata __initconst = {
+        .num_chipselect = 1,
+};
+
+#define r7s72100_register_rspi(idx)                                        \
+        platform_device_register_resndata(&platform_bus, "rspi-rz", idx,   \
+                                        rspi##idx##_resources,             \
+                                        ARRAY_SIZE(rspi##idx##_resources), \
+                                        &rspi_pdata, sizeof(rspi_pdata))
+
+static const struct spi_board_info spi_info[] __initconst = {
+        {
+                .modalias               = "wm8978",
+                .max_speed_hz           = 5000000,
+                .bus_num                = 4,
+                .chip_select            = 0,
+        },
+};
+
 static void __init genmai_add_standard_devices(void)
 {
         r7s72100_clock_init();
         r7s72100_add_dt_devices();
+
+        r7s72100_register_rspi(0);
+        r7s72100_register_rspi(1);
+        r7s72100_register_rspi(2);
+        r7s72100_register_rspi(3);
+        r7s72100_register_rspi(4);
+        spi_register_board_info(spi_info, ARRAY_SIZE(spi_info));
 }
 
 static const char * const genmai_boards_compat_dt[] __initconst = {