ARM: shmobile: r8a7778 SCIF support

Add SCIF serial port support to the r8a7778 SoC by
adding platform devices together with clock bindings.
DT device description is excluded at this point since
such bindings are still under development.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

2 files changed, 39 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/clock-r8a7778.c b/arch/arm/mach-shmobile/clock-r8a7778.c
index 387e3b74cc8c..f1277f45381e 100644
--- a/arch/arm/mach-shmobile/clock-r8a7778.c
+++ b/arch/arm/mach-shmobile/clock-r8a7778.c
@@ -58,16 +58,29 @@ static struct clk *main_clks[] = {
 };
 
 enum {
+        MSTP026, MSTP025, MSTP024, MSTP023, MSTP022, MSTP021,
         MSTP016, MSTP015,
         MSTP_NR };
 
 static struct clk mstp_clks[MSTP_NR] = {
+        [MSTP026] = SH_CLK_MSTP32(&clkp, MSTPCR0, 26, 0), /* SCIF0 */
+        [MSTP025] = SH_CLK_MSTP32(&clkp, MSTPCR0, 25, 0), /* SCIF1 */
+        [MSTP024] = SH_CLK_MSTP32(&clkp, MSTPCR0, 24, 0), /* SCIF2 */
+        [MSTP023] = SH_CLK_MSTP32(&clkp, MSTPCR0, 23, 0), /* SCIF3 */
+        [MSTP022] = SH_CLK_MSTP32(&clkp, MSTPCR0, 22, 0), /* SCIF4 */
+        [MSTP021] = SH_CLK_MSTP32(&clkp, MSTPCR0, 21, 0), /* SCIF5 */
         [MSTP016] = SH_CLK_MSTP32(&clkp, MSTPCR0, 16, 0), /* TMU0 */
         [MSTP015] = SH_CLK_MSTP32(&clkp, MSTPCR0, 15, 0), /* TMU1 */
 };
 
 static struct clk_lookup lookups[] = {
         /* MSTP32 clocks */
+        CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP026]), /* SCIF0 */
+        CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP025]), /* SCIF1 */
+        CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP024]), /* SCIF2 */
+        CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP023]), /* SCIF3 */
+        CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP022]), /* SCIF4 */
+        CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP021]), /* SCIF6 */
         CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP016]), /* TMU00 */
         CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP015]), /* TMU01 */
 };
diff --git a/arch/arm/mach-shmobile/setup-r8a7778.c b/arch/arm/mach-shmobile/setup-r8a7778.c
index 811ccf3c77a4..01c62bedf9cf 100644
--- a/arch/arm/mach-shmobile/setup-r8a7778.c
+++ b/arch/arm/mach-shmobile/setup-r8a7778.c
@@ -25,6 +25,7 @@
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/irqchip.h>
+#include <linux/serial_sci.h>
 #include <linux/sh_timer.h>
 #include <mach/irqs.h>
 #include <mach/r8a7778.h>
@@ -32,6 +33,26 @@
 #include <asm/mach/arch.h>
 #include <asm/hardware/cache-l2x0.h>
 
+/* SCIF */
+#define SCIF_INFO(baseaddr, irq)                                \
+{                                                               \
+        .mapbase        = baseaddr,                             \
+        .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP,      \
+        .scscr          = SCSCR_RE | SCSCR_TE | SCSCR_CKE1,     \
+        .scbrr_algo_id  = SCBRR_ALGO_2,                         \
+        .type           = PORT_SCIF,                            \
+        .irqs           = SCIx_IRQ_MUXED(irq),                  \
+}
+
+static struct plat_sci_port scif_platform_data[] = {
+        SCIF_INFO(0xffe40000, gic_iid(0x66)),
+        SCIF_INFO(0xffe41000, gic_iid(0x67)),
+        SCIF_INFO(0xffe42000, gic_iid(0x68)),
+        SCIF_INFO(0xffe43000, gic_iid(0x69)),
+        SCIF_INFO(0xffe44000, gic_iid(0x6a)),
+        SCIF_INFO(0xffe45000, gic_iid(0x6b)),
+};
+
 /* TMU */
 static struct resource sh_tmu0_resources[] = {
         DEFINE_RES_MEM(0xffd80008, 12),
@@ -88,6 +109,11 @@ void __init r8a7778_add_standard_devices(void)
         }
 #endif
 
+        for (i = 0; i < ARRAY_SIZE(scif_platform_data); i++)
+                platform_device_register_data(&platform_bus, "sh-sci", i,
+                                              &scif_platform_data[i],
+                                              sizeof(struct plat_sci_port));
+
         for (i = 0; i < ARRAY_SIZE(platform_devinfo); i++)
                 platform_device_register_full(&platform_devinfo[i]);
 }