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authorLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>2017-01-11 16:43:40 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-19 14:17:05 +0100
commitdfc80387aefb78161f83732804c6d01c89c24595 (patch)
tree1576a2c29d8c81842c676c6c6e9095e45e3c9f91 /arch/sh/kernel/cpu/sh4
parent97ed9790c514066bfae67f22e084b505ed5af436 (diff)
serial: sh-sci: Compute the regshift value for SCI ports
SCI instances found in SH SoCs have different spacing between registers depending on the SoC. The platform data contains a regshift field that tells the driver by how many bits to shift the register offset to compute its address. We can compute the regshift value automatically based on the memory resource size, there's no need to pass the value through platform data. Fix the sh7750 SCI and sh7760 SIM port memory resources length to ensure proper computation of the regshift value. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/sh/kernel/cpu/sh4')
-rw-r--r--arch/sh/kernel/cpu/sh4/setup-sh7750.c3
-rw-r--r--arch/sh/kernel/cpu/sh4/setup-sh7760.c10
2 files changed, 9 insertions, 4 deletions
diff --git a/arch/sh/kernel/cpu/sh4/setup-sh7750.c b/arch/sh/kernel/cpu/sh4/setup-sh7750.c
index d98a55416306..57d30689204d 100644
--- a/arch/sh/kernel/cpu/sh4/setup-sh7750.c
+++ b/arch/sh/kernel/cpu/sh4/setup-sh7750.c
@@ -39,11 +39,10 @@ static struct platform_device rtc_device = {
static struct plat_sci_port sci_platform_data = {
.type = PORT_SCI,
- .regshift = 2,
};
static struct resource sci_resources[] = {
- DEFINE_RES_MEM(0xffe00000, 0x100),
+ DEFINE_RES_MEM(0xffe00000, 0x20),
DEFINE_RES_IRQ(evt2irq(0x4e0)),
};
diff --git a/arch/sh/kernel/cpu/sh4/setup-sh7760.c b/arch/sh/kernel/cpu/sh4/setup-sh7760.c
index 0c0cdfc69dcc..e51fe1734e13 100644
--- a/arch/sh/kernel/cpu/sh4/setup-sh7760.c
+++ b/arch/sh/kernel/cpu/sh4/setup-sh7760.c
@@ -200,12 +200,18 @@ static struct platform_device scif2_device = {
};
static struct plat_sci_port scif3_platform_data = {
+ /*
+ * This is actually a SIM card module serial port, based on an SCI with
+ * additional registers. The sh-sci driver doesn't support the SIM port
+ * type, declare it as a SCI. Don't declare the additional registers in
+ * the memory resource or the driver will compute an incorrect regshift
+ * value.
+ */
.type = PORT_SCI,
- .regshift = 2,
};
static struct resource scif3_resources[] = {
- DEFINE_RES_MEM(0xfe480000, 0x100),
+ DEFINE_RES_MEM(0xfe480000, 0x10),
DEFINE_RES_IRQ(evt2irq(0xc00)),
DEFINE_RES_IRQ(evt2irq(0xc20)),
DEFINE_RES_IRQ(evt2irq(0xc40)),