| Message ID | 20171106194618.9421-4-tpiepho@impinj.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 06.11.2017 20:46, Trent Piepho wrote: > The docs for the spi_imx platform data still refer to a -32 offset used to > specify a native chip select. This was removed in commit 602c8f4485cd > ("spi: imx: fix use of native chip-selects with devicetree") and no > longer works as documented. Update documentation. > > The macro MXC_SPI_CS() is no longer is needed. > > If a board uses all native chip selects, then it's not necessary to > specify a chip select array at all, as all native is the default (this is > how device-tree configured SPI masters work too). Most of the spi-imx > platform data users have their chip select arrays removed by this patch. > > This patch also fixes a bug in mx31moboard introduced in the '602 commit. > When that board was updated in commit 901f26bce64a ("ARM: imx: set > correct chip_select in platform setup") to reflect the SPI change, only > SPI bus 2 was updated and SPI bus 1 was left with non-sequential chip > selects. The mc13783 spi device on bus 1 had its chip select updated as > if it were on bus 2. > > CC: Shawn Guo <shawnguo@kernel.org> > CC: Sascha Hauer <kernel@pengutronix.de> > CC: Fabio Estevam <fabio.estevam@nxp.com> > Acked-by: Greg Ungerer <gerg@linux-m68k.org> > Signed-off-by: Trent Piepho <tpiepho@impinj.com> Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de> > --- > arch/arm/mach-imx/mach-mx31_3ds.c | 18 ++---------------- > arch/arm/mach-imx/mach-mx31lilly.c | 12 ++---------- > arch/arm/mach-imx/mach-mx31lite.c | 16 ++-------------- > arch/arm/mach-imx/mach-mx31moboard.c | 17 +++-------------- > arch/arm/mach-imx/mach-pcm037_eet.c | 5 +---- > include/linux/platform_data/spi-imx.h | 29 +++++++++++++++++------------ > 6 files changed, 27 insertions(+), 70 deletions(-) > > diff --git a/arch/arm/mach-imx/mach-mx31_3ds.c b/arch/arm/mach-imx/mach-mx31_3ds.c > index 68c3f0799d5b..9d87f1dcf7bb 100644 > --- a/arch/arm/mach-imx/mach-mx31_3ds.c > +++ b/arch/arm/mach-imx/mach-mx31_3ds.c > @@ -374,26 +374,12 @@ 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), > -}; > - > static const struct spi_imx_master spi0_pdata __initconst = { > - .chipselect = spi0_internal_chipselect, > - .num_chipselect = ARRAY_SIZE(spi0_internal_chipselect), > -}; > - > -static int spi1_internal_chipselect[] = { > - MXC_SPI_CS(0), > - MXC_SPI_CS(1), > - MXC_SPI_CS(2), > + .num_chipselect = 3, > }; > > static const struct spi_imx_master spi1_pdata __initconst = { > - .chipselect = spi1_internal_chipselect, > - .num_chipselect = ARRAY_SIZE(spi1_internal_chipselect), > + .num_chipselect = 3, > }; > > static struct spi_board_info mx31_3ds_spi_devs[] __initdata = { > diff --git a/arch/arm/mach-imx/mach-mx31lilly.c b/arch/arm/mach-imx/mach-mx31lilly.c > index 6fd463642954..8bf52819d4d9 100644 > --- a/arch/arm/mach-imx/mach-mx31lilly.c > +++ b/arch/arm/mach-imx/mach-mx31lilly.c > @@ -226,20 +226,12 @@ static void __init lilly1131_usb_init(void) > > /* SPI */ > > -static int spi_internal_chipselect[] = { > - MXC_SPI_CS(0), > - MXC_SPI_CS(1), > - MXC_SPI_CS(2), > -}; > - > static const struct spi_imx_master spi0_pdata __initconst = { > - .chipselect = spi_internal_chipselect, > - .num_chipselect = ARRAY_SIZE(spi_internal_chipselect), > + .num_chipselect = 3, > }; > > static const struct spi_imx_master spi1_pdata __initconst = { > - .chipselect = spi_internal_chipselect, > - .num_chipselect = ARRAY_SIZE(spi_internal_chipselect), > + .num_chipselect = 3, > }; > > static struct mc13xxx_platform_data mc13783_pdata __initdata = { > diff --git a/arch/arm/mach-imx/mach-mx31lite.c b/arch/arm/mach-imx/mach-mx31lite.c > index f033a57d5694..fcbaf0070ccf 100644 > --- a/arch/arm/mach-imx/mach-mx31lite.c > +++ b/arch/arm/mach-imx/mach-mx31lite.c > @@ -83,15 +83,8 @@ static const struct imxuart_platform_data uart_pdata __initconst = { > }; > > /* SPI */ > -static int spi0_internal_chipselect[] = { > - MXC_SPI_CS(0), > - MXC_SPI_CS(1), > - MXC_SPI_CS(2), > -}; > - > static const struct spi_imx_master spi0_pdata __initconst = { > - .chipselect = spi0_internal_chipselect, > - .num_chipselect = ARRAY_SIZE(spi0_internal_chipselect), > + .num_chipselect = 3, > }; > > static const struct mxc_nand_platform_data > @@ -133,13 +126,8 @@ static struct platform_device smsc911x_device = { > * The MC13783 is the only hard-wired SPI device on the module. > */ > > -static int spi1_internal_chipselect[] = { > - MXC_SPI_CS(0), > -}; > - > static const struct spi_imx_master spi1_pdata __initconst = { > - .chipselect = spi1_internal_chipselect, > - .num_chipselect = ARRAY_SIZE(spi1_internal_chipselect), > + .num_chipselect = 1, > }; > > static struct mc13xxx_platform_data mc13783_pdata __initdata = { > diff --git a/arch/arm/mach-imx/mach-mx31moboard.c b/arch/arm/mach-imx/mach-mx31moboard.c > index 7716f83aecdd..643a3d749703 100644 > --- a/arch/arm/mach-imx/mach-mx31moboard.c > +++ b/arch/arm/mach-imx/mach-mx31moboard.c > @@ -152,14 +152,8 @@ static const struct imxi2c_platform_data moboard_i2c1_data __initconst = { > .bitrate = 100000, > }; > > -static int moboard_spi1_cs[] = { > - MXC_SPI_CS(0), > - MXC_SPI_CS(2), > -}; > - > static const struct spi_imx_master moboard_spi1_pdata __initconst = { > - .chipselect = moboard_spi1_cs, > - .num_chipselect = ARRAY_SIZE(moboard_spi1_cs), > + .num_chipselect = 3, > }; > > static struct regulator_consumer_supply sdhc_consumers[] = { > @@ -296,19 +290,14 @@ 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 = 1, > + .chip_select = 0, > .platform_data = &moboard_pmic, > .mode = SPI_CS_HIGH, > }, > }; > > -static int moboard_spi2_cs[] = { > - MXC_SPI_CS(0), MXC_SPI_CS(1), > -}; > - > static const struct spi_imx_master moboard_spi2_pdata __initconst = { > - .chipselect = moboard_spi2_cs, > - .num_chipselect = ARRAY_SIZE(moboard_spi2_cs), > + .num_chipselect = 2, > }; > > #define SDHC1_CD IOMUX_TO_GPIO(MX31_PIN_ATA_CS0) > diff --git a/arch/arm/mach-imx/mach-pcm037_eet.c b/arch/arm/mach-imx/mach-pcm037_eet.c > index 95bd97710494..15bc956d466b 100644 > --- a/arch/arm/mach-imx/mach-pcm037_eet.c > +++ b/arch/arm/mach-imx/mach-pcm037_eet.c > @@ -56,11 +56,8 @@ static struct spi_board_info pcm037_spi_dev[] = { > }; > > /* Platform Data for MXC CSPI */ > -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, > - .num_chipselect = ARRAY_SIZE(pcm037_spi1_cs), > + .num_chipselect = 2, > }; > > /* GPIO-keys input device */ > diff --git a/include/linux/platform_data/spi-imx.h b/include/linux/platform_data/spi-imx.h > index 08be445e8eb8..9b2ed66ef7a2 100644 > --- a/include/linux/platform_data/spi-imx.h > +++ b/include/linux/platform_data/spi-imx.h > @@ -4,24 +4,29 @@ > > /* > * struct spi_imx_master - device.platform_data for SPI controller devices. > - * @chipselect: Array of chipselects for this master. Numbers >= 0 mean gpio > - * pins, numbers < 0 mean internal CSPI chipselects according > - * to MXC_SPI_CS(). Normally you want to use gpio based chip > - * selects as the CSPI module tries to be intelligent about > - * when to assert the chipselect: The CSPI module deasserts the > - * chipselect once it runs out of input data. The other problem > - * is that it is not possible to mix between high active and low > - * active chipselects on one single bus using the internal > - * chipselects. Unfortunately Freescale decided to put some > + * @chipselect: Array of chipselects for this master or NULL. Numbers >= 0 > + * mean GPIO pins, -ENOENT means internal CSPI chipselect > + * matching the position in the array. E.g., if chipselect[1] = > + * -ENOENT then a SPI slave using chip select 1 will use the > + * native SS1 line of the CSPI. Omitting the array will use > + * all native chip selects. > + > + * Normally you want to use gpio based chip selects as the CSPI > + * module tries to be intelligent about when to assert the > + * chipselect: The CSPI module deasserts the chipselect once it > + * runs out of input data. The other problem is that it is not > + * possible to mix between high active and low active chipselects > + * on one single bus using the internal chipselects. > + * Unfortunately, on some SoCs, Freescale decided to put some > * chipselects on dedicated pins which are not usable as gpios, > * so we have to support the internal chipselects. > - * @num_chipselect: ARRAY_SIZE(chipselect) > + * > + * @num_chipselect: If @chipselect is specified, ARRAY_SIZE(chipselect), > + * otherwise the number of native chip selects. > */ > struct spi_imx_master { > int *chipselect; > int num_chipselect; > }; > > -#define MXC_SPI_CS(no) ((no) - 32) > - > #endif /* __MACH_SPI_H_*/ > -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Mon, Nov 06, 2017 at 11:46:18AM -0800, Trent Piepho wrote: > The docs for the spi_imx platform data still refer to a -32 offset used to > specify a native chip select. This was removed in commit 602c8f4485cd > ("spi: imx: fix use of native chip-selects with devicetree") and no > longer works as documented. Update documentation. > > The macro MXC_SPI_CS() is no longer is needed. > > If a board uses all native chip selects, then it's not necessary to > specify a chip select array at all, as all native is the default (this is > how device-tree configured SPI masters work too). Most of the spi-imx > platform data users have their chip select arrays removed by this patch. > > This patch also fixes a bug in mx31moboard introduced in the '602 commit. > When that board was updated in commit 901f26bce64a ("ARM: imx: set > correct chip_select in platform setup") to reflect the SPI change, only > SPI bus 2 was updated and SPI bus 1 was left with non-sequential chip > selects. The mc13783 spi device on bus 1 had its chip select updated as > if it were on bus 2. > > CC: Shawn Guo <shawnguo@kernel.org> Acked-by: Shawn Guo <shawnguo@kernel.org> -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/arm/mach-imx/mach-mx31_3ds.c b/arch/arm/mach-imx/mach-mx31_3ds.c index 68c3f0799d5b..9d87f1dcf7bb 100644 --- a/arch/arm/mach-imx/mach-mx31_3ds.c +++ b/arch/arm/mach-imx/mach-mx31_3ds.c @@ -374,26 +374,12 @@ 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), -}; - static const struct spi_imx_master spi0_pdata __initconst = { - .chipselect = spi0_internal_chipselect, - .num_chipselect = ARRAY_SIZE(spi0_internal_chipselect), -}; - -static int spi1_internal_chipselect[] = { - MXC_SPI_CS(0), - MXC_SPI_CS(1), - MXC_SPI_CS(2), + .num_chipselect = 3, }; static const struct spi_imx_master spi1_pdata __initconst = { - .chipselect = spi1_internal_chipselect, - .num_chipselect = ARRAY_SIZE(spi1_internal_chipselect), + .num_chipselect = 3, }; static struct spi_board_info mx31_3ds_spi_devs[] __initdata = { diff --git a/arch/arm/mach-imx/mach-mx31lilly.c b/arch/arm/mach-imx/mach-mx31lilly.c index 6fd463642954..8bf52819d4d9 100644 --- a/arch/arm/mach-imx/mach-mx31lilly.c +++ b/arch/arm/mach-imx/mach-mx31lilly.c @@ -226,20 +226,12 @@ static void __init lilly1131_usb_init(void) /* SPI */ -static int spi_internal_chipselect[] = { - MXC_SPI_CS(0), - MXC_SPI_CS(1), - MXC_SPI_CS(2), -}; - static const struct spi_imx_master spi0_pdata __initconst = { - .chipselect = spi_internal_chipselect, - .num_chipselect = ARRAY_SIZE(spi_internal_chipselect), + .num_chipselect = 3, }; static const struct spi_imx_master spi1_pdata __initconst = { - .chipselect = spi_internal_chipselect, - .num_chipselect = ARRAY_SIZE(spi_internal_chipselect), + .num_chipselect = 3, }; static struct mc13xxx_platform_data mc13783_pdata __initdata = { diff --git a/arch/arm/mach-imx/mach-mx31lite.c b/arch/arm/mach-imx/mach-mx31lite.c index f033a57d5694..fcbaf0070ccf 100644 --- a/arch/arm/mach-imx/mach-mx31lite.c +++ b/arch/arm/mach-imx/mach-mx31lite.c @@ -83,15 +83,8 @@ static const struct imxuart_platform_data uart_pdata __initconst = { }; /* SPI */ -static int spi0_internal_chipselect[] = { - MXC_SPI_CS(0), - MXC_SPI_CS(1), - MXC_SPI_CS(2), -}; - static const struct spi_imx_master spi0_pdata __initconst = { - .chipselect = spi0_internal_chipselect, - .num_chipselect = ARRAY_SIZE(spi0_internal_chipselect), + .num_chipselect = 3, }; static const struct mxc_nand_platform_data @@ -133,13 +126,8 @@ static struct platform_device smsc911x_device = { * The MC13783 is the only hard-wired SPI device on the module. */ -static int spi1_internal_chipselect[] = { - MXC_SPI_CS(0), -}; - static const struct spi_imx_master spi1_pdata __initconst = { - .chipselect = spi1_internal_chipselect, - .num_chipselect = ARRAY_SIZE(spi1_internal_chipselect), + .num_chipselect = 1, }; static struct mc13xxx_platform_data mc13783_pdata __initdata = { diff --git a/arch/arm/mach-imx/mach-mx31moboard.c b/arch/arm/mach-imx/mach-mx31moboard.c index 7716f83aecdd..643a3d749703 100644 --- a/arch/arm/mach-imx/mach-mx31moboard.c +++ b/arch/arm/mach-imx/mach-mx31moboard.c @@ -152,14 +152,8 @@ static const struct imxi2c_platform_data moboard_i2c1_data __initconst = { .bitrate = 100000, }; -static int moboard_spi1_cs[] = { - MXC_SPI_CS(0), - MXC_SPI_CS(2), -}; - static const struct spi_imx_master moboard_spi1_pdata __initconst = { - .chipselect = moboard_spi1_cs, - .num_chipselect = ARRAY_SIZE(moboard_spi1_cs), + .num_chipselect = 3, }; static struct regulator_consumer_supply sdhc_consumers[] = { @@ -296,19 +290,14 @@ 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 = 1, + .chip_select = 0, .platform_data = &moboard_pmic, .mode = SPI_CS_HIGH, }, }; -static int moboard_spi2_cs[] = { - MXC_SPI_CS(0), MXC_SPI_CS(1), -}; - static const struct spi_imx_master moboard_spi2_pdata __initconst = { - .chipselect = moboard_spi2_cs, - .num_chipselect = ARRAY_SIZE(moboard_spi2_cs), + .num_chipselect = 2, }; #define SDHC1_CD IOMUX_TO_GPIO(MX31_PIN_ATA_CS0) diff --git a/arch/arm/mach-imx/mach-pcm037_eet.c b/arch/arm/mach-imx/mach-pcm037_eet.c index 95bd97710494..15bc956d466b 100644 --- a/arch/arm/mach-imx/mach-pcm037_eet.c +++ b/arch/arm/mach-imx/mach-pcm037_eet.c @@ -56,11 +56,8 @@ static struct spi_board_info pcm037_spi_dev[] = { }; /* Platform Data for MXC CSPI */ -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, - .num_chipselect = ARRAY_SIZE(pcm037_spi1_cs), + .num_chipselect = 2, }; /* GPIO-keys input device */ diff --git a/include/linux/platform_data/spi-imx.h b/include/linux/platform_data/spi-imx.h index 08be445e8eb8..9b2ed66ef7a2 100644 --- a/include/linux/platform_data/spi-imx.h +++ b/include/linux/platform_data/spi-imx.h @@ -4,24 +4,29 @@ /* * struct spi_imx_master - device.platform_data for SPI controller devices. - * @chipselect: Array of chipselects for this master. Numbers >= 0 mean gpio - * pins, numbers < 0 mean internal CSPI chipselects according - * to MXC_SPI_CS(). Normally you want to use gpio based chip - * selects as the CSPI module tries to be intelligent about - * when to assert the chipselect: The CSPI module deasserts the - * chipselect once it runs out of input data. The other problem - * is that it is not possible to mix between high active and low - * active chipselects on one single bus using the internal - * chipselects. Unfortunately Freescale decided to put some + * @chipselect: Array of chipselects for this master or NULL. Numbers >= 0 + * mean GPIO pins, -ENOENT means internal CSPI chipselect + * matching the position in the array. E.g., if chipselect[1] = + * -ENOENT then a SPI slave using chip select 1 will use the + * native SS1 line of the CSPI. Omitting the array will use + * all native chip selects. + + * Normally you want to use gpio based chip selects as the CSPI + * module tries to be intelligent about when to assert the + * chipselect: The CSPI module deasserts the chipselect once it + * runs out of input data. The other problem is that it is not + * possible to mix between high active and low active chipselects + * on one single bus using the internal chipselects. + * Unfortunately, on some SoCs, Freescale decided to put some * chipselects on dedicated pins which are not usable as gpios, * so we have to support the internal chipselects. - * @num_chipselect: ARRAY_SIZE(chipselect) + * + * @num_chipselect: If @chipselect is specified, ARRAY_SIZE(chipselect), + * otherwise the number of native chip selects. */ struct spi_imx_master { int *chipselect; int num_chipselect; }; -#define MXC_SPI_CS(no) ((no) - 32) - #endif /* __MACH_SPI_H_*/
The docs for the spi_imx platform data still refer to a -32 offset used to specify a native chip select. This was removed in commit 602c8f4485cd ("spi: imx: fix use of native chip-selects with devicetree") and no longer works as documented. Update documentation. The macro MXC_SPI_CS() is no longer is needed. If a board uses all native chip selects, then it's not necessary to specify a chip select array at all, as all native is the default (this is how device-tree configured SPI masters work too). Most of the spi-imx platform data users have their chip select arrays removed by this patch. This patch also fixes a bug in mx31moboard introduced in the '602 commit. When that board was updated in commit 901f26bce64a ("ARM: imx: set correct chip_select in platform setup") to reflect the SPI change, only SPI bus 2 was updated and SPI bus 1 was left with non-sequential chip selects. The mc13783 spi device on bus 1 had its chip select updated as if it were on bus 2. CC: Shawn Guo <shawnguo@kernel.org> CC: Sascha Hauer <kernel@pengutronix.de> CC: Fabio Estevam <fabio.estevam@nxp.com> Acked-by: Greg Ungerer <gerg@linux-m68k.org> Signed-off-by: Trent Piepho <tpiepho@impinj.com> --- arch/arm/mach-imx/mach-mx31_3ds.c | 18 ++---------------- arch/arm/mach-imx/mach-mx31lilly.c | 12 ++---------- arch/arm/mach-imx/mach-mx31lite.c | 16 ++-------------- arch/arm/mach-imx/mach-mx31moboard.c | 17 +++-------------- arch/arm/mach-imx/mach-pcm037_eet.c | 5 +---- include/linux/platform_data/spi-imx.h | 29 +++++++++++++++++------------ 6 files changed, 27 insertions(+), 70 deletions(-)