diff options
Diffstat (limited to 'target/linux/ar71xx/patches-3.18/206-spi-ath79-make-chipselect-logic-more-flexible.patch')
| -rw-r--r-- | target/linux/ar71xx/patches-3.18/206-spi-ath79-make-chipselect-logic-more-flexible.patch | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/target/linux/ar71xx/patches-3.18/206-spi-ath79-make-chipselect-logic-more-flexible.patch b/target/linux/ar71xx/patches-3.18/206-spi-ath79-make-chipselect-logic-more-flexible.patch deleted file mode 100644 index 76c067a2ea..0000000000 --- a/target/linux/ar71xx/patches-3.18/206-spi-ath79-make-chipselect-logic-more-flexible.patch +++ /dev/null @@ -1,191 +0,0 @@ -From 7008284716403237f6bc7d7590b3ed073555bd56 Mon Sep 17 00:00:00 2001 -From: Gabor Juhos <juhosg@openwrt.org> -Date: Wed, 11 Jan 2012 22:25:11 +0100 -Subject: [PATCH 34/34] spi/ath79: make chipselect logic more flexible - -Signed-off-by: Gabor Juhos <juhosg@openwrt.org> ---- - arch/mips/ath79/mach-pb44.c | 6 ++ - .../include/asm/mach-ath79/ath79_spi_platform.h | 8 ++- - drivers/spi/spi-ath79.c | 67 +++++++++++++------- - 8 files changed, 88 insertions(+), 23 deletions(-) - ---- a/arch/mips/ath79/mach-pb44.c -+++ b/arch/mips/ath79/mach-pb44.c -@@ -87,12 +87,18 @@ static struct gpio_keys_button pb44_gpio - } - }; - -+static struct ath79_spi_controller_data pb44_spi0_data = { -+ .cs_type = ATH79_SPI_CS_TYPE_INTERNAL, -+ .cs_line = 0, -+}; -+ - static struct spi_board_info pb44_spi_info[] = { - { - .bus_num = 0, - .chip_select = 0, - .max_speed_hz = 25000000, - .modalias = "m25p64", -+ .controller_data = &pb44_spi0_data, - }, - }; - ---- a/arch/mips/include/asm/mach-ath79/ath79_spi_platform.h -+++ b/arch/mips/include/asm/mach-ath79/ath79_spi_platform.h -@@ -16,8 +16,14 @@ struct ath79_spi_platform_data { - unsigned num_chipselect; - }; - -+enum ath79_spi_cs_type { -+ ATH79_SPI_CS_TYPE_INTERNAL, -+ ATH79_SPI_CS_TYPE_GPIO, -+}; -+ - struct ath79_spi_controller_data { -- unsigned gpio; -+ enum ath79_spi_cs_type cs_type; -+ unsigned cs_line; - }; - - #endif /* _ATH79_SPI_PLATFORM_H */ ---- a/drivers/spi/spi-ath79.c -+++ b/drivers/spi/spi-ath79.c -@@ -33,6 +33,8 @@ - #define ATH79_SPI_RRW_DELAY_FACTOR 12000 - #define MHZ (1000 * 1000) - -+#define ATH79_SPI_CS_LINE_MAX 2 -+ - struct ath79_spi { - struct spi_bitbang bitbang; - u32 ioc_base; -@@ -67,6 +69,7 @@ static void ath79_spi_chipselect(struct - { - struct ath79_spi *sp = ath79_spidev_to_sp(spi); - int cs_high = (spi->mode & SPI_CS_HIGH) ? is_active : !is_active; -+ struct ath79_spi_controller_data *cdata = spi->controller_data; - - if (is_active) { - /* set initial clock polarity */ -@@ -78,20 +81,24 @@ static void ath79_spi_chipselect(struct - ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base); - } - -- if (spi->chip_select) { -- struct ath79_spi_controller_data *cdata = spi->controller_data; -- -- /* SPI is normally active-low */ -- gpio_set_value(cdata->gpio, cs_high); -- } else { -+ switch (cdata->cs_type) { -+ case ATH79_SPI_CS_TYPE_INTERNAL: - if (cs_high) -- sp->ioc_base |= AR71XX_SPI_IOC_CS0; -+ sp->ioc_base |= AR71XX_SPI_IOC_CS(cdata->cs_line); - else -- sp->ioc_base &= ~AR71XX_SPI_IOC_CS0; -+ sp->ioc_base &= ~AR71XX_SPI_IOC_CS(cdata->cs_line); - - ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base); -- } -+ break; - -+ case ATH79_SPI_CS_TYPE_GPIO: -+ /* SPI is normally active-low */ -+ if (gpio_cansleep(cdata->cs_line)) -+ gpio_set_value_cansleep(cdata->cs_line, cs_high); -+ else -+ gpio_set_value(cdata->cs_line, cs_high); -+ break; -+ } - } - - static void ath79_spi_enable(struct ath79_spi *sp) -@@ -118,24 +125,30 @@ static void ath79_spi_disable(struct ath - static int ath79_spi_setup_cs(struct spi_device *spi) - { - struct ath79_spi_controller_data *cdata; -+ unsigned long flags; - int status; - - cdata = spi->controller_data; -- if (spi->chip_select && !cdata) -+ if (!cdata) - return -EINVAL; - - status = 0; -- if (spi->chip_select) { -- unsigned long flags; -+ switch (cdata->cs_type) { -+ case ATH79_SPI_CS_TYPE_INTERNAL: -+ if (cdata->cs_line > ATH79_SPI_CS_LINE_MAX) -+ status = -EINVAL; -+ break; - -+ case ATH79_SPI_CS_TYPE_GPIO: - flags = GPIOF_DIR_OUT; - if (spi->mode & SPI_CS_HIGH) - flags |= GPIOF_INIT_LOW; - else - flags |= GPIOF_INIT_HIGH; - -- status = gpio_request_one(cdata->gpio, flags, -+ status = gpio_request_one(cdata->cs_line, flags, - dev_name(&spi->dev)); -+ break; - } - - return status; -@@ -143,9 +156,19 @@ static int ath79_spi_setup_cs(struct spi - - static void ath79_spi_cleanup_cs(struct spi_device *spi) - { -- if (spi->chip_select) { -- struct ath79_spi_controller_data *cdata = spi->controller_data; -- gpio_free(cdata->gpio); -+ struct ath79_spi_controller_data *cdata; -+ -+ cdata = spi->controller_data; -+ if (!cdata) -+ return; -+ -+ switch (cdata->cs_type) { -+ case ATH79_SPI_CS_TYPE_INTERNAL: -+ /* nothing to do */ -+ break; -+ case ATH79_SPI_CS_TYPE_GPIO: -+ gpio_free(cdata->cs_line); -+ break; - } - } - -@@ -210,6 +233,10 @@ static int ath79_spi_probe(struct platfo - unsigned long rate; - int ret; - -+ pdata = pdev->dev.platform_data; -+ if (!pdata) -+ return -EINVAL; -+ - master = spi_alloc_master(&pdev->dev, sizeof(*sp)); - if (master == NULL) { - dev_err(&pdev->dev, "failed to allocate spi master\n"); -@@ -219,15 +246,11 @@ static int ath79_spi_probe(struct platfo - sp = spi_master_get_devdata(master); - platform_set_drvdata(pdev, sp); - -- pdata = dev_get_platdata(&pdev->dev); -- - master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32); - master->setup = ath79_spi_setup; - master->cleanup = ath79_spi_cleanup; -- if (pdata) { -- master->bus_num = pdata->bus_num; -- master->num_chipselect = pdata->num_chipselect; -- } -+ master->bus_num = pdata->bus_num; -+ master->num_chipselect = pdata->num_chipselect; - - sp->bitbang.master = master; - sp->bitbang.chipselect = ath79_spi_chipselect; |