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authorGreg Ungerer <gerg@linux-m68k.org>2017-03-17 15:03:02 +1000
committerShawn Guo <shawnguo@kernel.org>2017-03-20 15:38:56 +0800
commit901f26bce64a96bd9d038fda3604bd0ab1098c3b (patch)
treebbf2c8c94ade99cfd150bf2bef5d028ffc7ac27d /arch/arm/mach-imx
parent55edcbb2db3a41c1520425b84c620286f4e5e394 (diff)
ARM: imx: set correct chip_select in platform setup
Some platform based configuration setup of spi-imx SPI devices does not set the "chip_select" to the actual hardware chip select used. This works because the cs_gpio mapping that is associated with this platform setup maps the chip_select offset used to the appropriate hardware chip select. The spi-imx driver uses the chip_select as an index into the cs_gpio array and ultimately gets the correct hardware chip select for its hardware setup. The motivation is to be able to eventually modify the spi-imx code to use the "chip_select" directly for harwdare setup instead of indirectly via the cs_gpio mapping array. This change only affects platforms using the hardware chip select addressing method for their SPI devices (sometimes called native chip select). The majority of devices using the spi-imx driver use the GPIO addressing method. The change to use the correct "chip_select" is strait forward. But the cs_gpio mapping arrary also needs to be modifed to match that change. In simple terms the cs_gpio mapping should always have the hardware chip select number at its same index offset. There is no functional change with these patches. The three affected platforms should work exactly as before. However I don't have any of these platforms (or access to them) and so I can't test them. So this patch is compile tested only. Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Diffstat (limited to 'arch/arm/mach-imx')
-rw-r--r--arch/arm/mach-imx/mach-mx31_3ds.c7
-rw-r--r--arch/arm/mach-imx/mach-mx31moboard.c4
-rw-r--r--arch/arm/mach-imx/mach-pcm037_eet.c4
3 files changed, 9 insertions, 6 deletions
diff --git a/arch/arm/mach-imx/mach-mx31_3ds.c b/arch/arm/mach-imx/mach-mx31_3ds.c
index 558e5f8589cb..68c3f0799d5b 100644
--- a/arch/arm/mach-imx/mach-mx31_3ds.c
+++ b/arch/arm/mach-imx/mach-mx31_3ds.c
@@ -375,6 +375,8 @@ static struct imx_ssi_platform_data mx31_3ds_ssi_pdata = {
/* SPI */
static int spi0_internal_chipselect[] = {
+ MXC_SPI_CS(0),
+ MXC_SPI_CS(1),
MXC_SPI_CS(2),
};
@@ -385,6 +387,7 @@ static const struct spi_imx_master spi0_pdata __initconst = {
static int spi1_internal_chipselect[] = {
MXC_SPI_CS(0),
+ MXC_SPI_CS(1),
MXC_SPI_CS(2),
};
@@ -398,7 +401,7 @@ static struct spi_board_info mx31_3ds_spi_devs[] __initdata = {
.modalias = "mc13783",
.max_speed_hz = 1000000,
.bus_num = 1,
- .chip_select = 1, /* SS2 */
+ .chip_select = 2, /* SS2 */
.platform_data = &mc13783_pdata,
/* irq number is run-time assigned */
.mode = SPI_CS_HIGH,
@@ -406,7 +409,7 @@ static struct spi_board_info mx31_3ds_spi_devs[] __initdata = {
.modalias = "l4f00242t03",
.max_speed_hz = 5000000,
.bus_num = 0,
- .chip_select = 0, /* SS2 */
+ .chip_select = 2, /* SS2 */
.platform_data = &mx31_3ds_l4f00242t03_pdata,
},
};
diff --git a/arch/arm/mach-imx/mach-mx31moboard.c b/arch/arm/mach-imx/mach-mx31moboard.c
index cc867682520e..bde9a9af6714 100644
--- a/arch/arm/mach-imx/mach-mx31moboard.c
+++ b/arch/arm/mach-imx/mach-mx31moboard.c
@@ -296,14 +296,14 @@ static struct spi_board_info moboard_spi_board_info[] __initdata = {
/* irq number is run-time assigned */
.max_speed_hz = 300000,
.bus_num = 1,
- .chip_select = 0,
+ .chip_select = 1,
.platform_data = &moboard_pmic,
.mode = SPI_CS_HIGH,
},
};
static int moboard_spi2_cs[] = {
- MXC_SPI_CS(1),
+ MXC_SPI_CS(0), MXC_SPI_CS(1),
};
static const struct spi_imx_master moboard_spi2_pdata __initconst = {
diff --git a/arch/arm/mach-imx/mach-pcm037_eet.c b/arch/arm/mach-imx/mach-pcm037_eet.c
index 8fd8255068ee..95bd97710494 100644
--- a/arch/arm/mach-imx/mach-pcm037_eet.c
+++ b/arch/arm/mach-imx/mach-pcm037_eet.c
@@ -50,13 +50,13 @@ static struct spi_board_info pcm037_spi_dev[] = {
.modalias = "dac124s085",
.max_speed_hz = 400000,
.bus_num = 0,
- .chip_select = 0, /* Index in pcm037_spi1_cs[] */
+ .chip_select = 1, /* Index in pcm037_spi1_cs[] */
.mode = SPI_CPHA,
},
};
/* Platform Data for MXC CSPI */
-static int pcm037_spi1_cs[] = {MXC_SPI_CS(1), IOMUX_TO_GPIO(MX31_PIN_KEY_COL7)};
+static int pcm037_spi1_cs[] = { MXC_SPI_CS(0), MXC_SPI_CS(1), };
static const struct spi_imx_master pcm037_spi1_pdata __initconst = {
.chipselect = pcm037_spi1_cs,