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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH 27/45] spi: atmel_spi: Configure CS GPIO as output
Date: Mon,  6 Mar 2017 14:53:38 -0800	[thread overview]
Message-ID: <20170306225356.31475-28-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20170306225356.31475-1-andrew.smirnov@gmail.com>

On AT91 GPIOs default to being inputs, so we need to explicitly
configure CS gpio to being an output.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 drivers/spi/atmel_spi.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c
index 68466ef..b183344 100644
--- a/drivers/spi/atmel_spi.c
+++ b/drivers/spi/atmel_spi.c
@@ -173,6 +173,8 @@ static int atmel_spi_setup(struct spi_device *spi)
 	struct spi_master	*master = spi->master;
 	struct atmel_spi	*as = to_atmel_spi(master);
 
+	int			npcs_pin;
+	unsigned		active = spi->mode & SPI_CS_HIGH;
 	u32			scbr, csr;
 	unsigned int		bits = spi->bits_per_word;
 	unsigned long		bus_hz;
@@ -184,6 +186,8 @@ static int atmel_spi_setup(struct spi_device *spi)
 		return -EINVAL;
 	}
 
+	npcs_pin = as->cs_pins[spi->chip_select];
+
 	if (bits < 8 || bits > 16) {
 		dev_dbg(&spi->dev,
 				"setup: invalid bits_per_word %u (8 to 16)\n",
@@ -236,7 +240,7 @@ static int atmel_spi_setup(struct spi_device *spi)
 	csr |= SPI_BF(DLYBS, 0);
 	csr |= SPI_BF(DLYBCT, 0);
 
-	/* gpio_direction_output(npcs_pin, !(spi->mode & SPI_CS_HIGH)); */
+	gpio_direction_output(npcs_pin, !active);
 	dev_dbg(master->dev,
 		"setup: %lu Hz bpw %u mode 0x%x -> csr%d %08x\n",
 		bus_hz / scbr, bits, spi->mode, spi->chip_select, csr);
-- 
2.9.3


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  parent reply	other threads:[~2017-03-06 22:55 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-06 22:53 [PATCH 00/45] AT91, at91sam9x5ek updates Andrey Smirnov
2017-03-06 22:53 ` [PATCH 01/45] at91: Fix bug/typo in debug_ll.h Andrey Smirnov
2017-03-06 22:53 ` [PATCH 02/45] at91sam9x5ek: Convert to mult-image build Andrey Smirnov
2017-03-06 22:53 ` [PATCH 03/45] at91sam9x5ek: Add CONFIG_KALLSYMS to defconfig Andrey Smirnov
2017-03-06 22:53 ` [PATCH 04/45] at91sam9x5ek: Add preliminary device tree support Andrey Smirnov
2017-03-06 22:53 ` [PATCH 05/45] clocksource: at91: Move to 'drivers/clocksource' Andrey Smirnov
2017-03-06 22:53 ` [PATCH 06/45] clocksource: at91: Add DT compatibility table Andrey Smirnov
2017-03-06 22:53 ` [PATCH 07/45] serial: atmel: Check result of clk_get() Andrey Smirnov
2017-03-07  7:46   ` Sascha Hauer
2017-03-06 22:53 ` [PATCH 08/45] serial: atmel: Add DT compatibility table Andrey Smirnov
2017-03-06 22:53 ` [PATCH 09/45] regmap: Implement syscon_node_to_regmap() Andrey Smirnov
2017-03-06 22:53 ` [PATCH 10/45] clk: Port two helper functions from Linux Andrey Smirnov
2017-03-06 22:53 ` [PATCH 11/45] clk: Make COMMON_CLK_OF_PROVIDER depend on OFTREE Andrey Smirnov
2017-03-06 22:53 ` [PATCH 12/45] clk: No-op CLK_OF_DECLARE if not enabled Andrey Smirnov
2017-03-06 22:53 ` [PATCH 13/45] clk: at91: Port at91 DT clock code Andrey Smirnov
2017-03-06 22:53 ` [PATCH 14/45] at91sam9x5ek: Convert to use DT clock tree Andrey Smirnov
2017-03-06 22:53 ` [PATCH 15/45] at91sam9x5ek: Remove at91sam9x5ek_mem_init() Andrey Smirnov
2017-03-06 22:53 ` [PATCH 16/45] at91sam9x5ek: Configure LEDs in DT Andrey Smirnov
2017-03-06 22:53 ` [PATCH 17/45] pinctrl-at91: Fix a bug in at91_pinctrl_set_conf() Andrey Smirnov
2017-03-06 22:53 ` [PATCH 18/45] at91: Enable PINCTRL for SOC_AT91SAM9 Andrey Smirnov
2017-03-06 22:53 ` [PATCH 19/45] at91sam9x5ek: Configure I2C via DT Andrey Smirnov
2017-03-06 22:53 ` [PATCH 20/45] mci: Allow parsing for explicit DT node Andrey Smirnov
2017-03-06 22:53 ` [PATCH 21/45] mci: atmel_mci: Add DT support Andrey Smirnov
2017-03-06 22:53 ` [PATCH 22/45] at91sam9x5ek: Configure MMC in DT Andrey Smirnov
2017-03-06 22:53 ` [PATCH 23/45] of: base: Use scoring in DT device matching Andrey Smirnov
2017-03-06 22:53 ` [PATCH 24/45] pinctrl: at91: Fix a bug in at91_pinctrl_set_state Andrey Smirnov
2017-03-06 22:53 ` [PATCH 25/45] pinctrl: at91: Implement .get_direction hook Andrey Smirnov
2017-03-06 22:53 ` [PATCH 26/45] spi: atmel_spi: Add DT support Andrey Smirnov
2017-03-06 22:53 ` Andrey Smirnov [this message]
2017-03-06 22:53 ` [PATCH 28/45] spi: atmel_spi: Use VERSION register instead of CPU type Andrey Smirnov
2017-03-06 22:53 ` [PATCH 29/45] at91sam9x5ek: Configure SPI in DT Andrey Smirnov
2017-03-06 22:53 ` [PATCH 30/45] w1-gpio: Add DT support Andrey Smirnov
2017-03-06 22:53 ` [PATCH 31/45] at91sam9x5ek: Configure 1-wire in DT Andrey Smirnov
2017-03-06 22:53 ` [PATCH 32/45] usb: ohci-at91: Check result of clk_get() Andrey Smirnov
2017-03-07 16:35   ` Sam Ravnborg
2017-03-07 21:21     ` Andrey Smirnov
2017-03-07 21:52       ` Sam Ravnborg
2017-03-06 22:53 ` [PATCH 33/45] usb: ohci-at91: Convert global variables to private data Andrey Smirnov
2017-03-06 22:53 ` [PATCH 34/45] usb: ohci-at91: Check result of clk_enable() Andrey Smirnov
2017-03-06 22:53 ` [PATCH 35/45] usb: ohci-at91: Add DT support Andrey Smirnov
2017-03-07 16:40   ` Sam Ravnborg
2017-03-06 22:53 ` [PATCH 36/45] usb/host: Allow USB_OHCI_AT91 even if USB_OHCI is disabled Andrey Smirnov
2017-03-06 22:53 ` [PATCH 37/45] usb: ehci-atmel: Check result of clk_enable() Andrey Smirnov
2017-03-06 22:53 ` [PATCH 38/45] usb: echi-atmel: Convert global variables to private data Andrey Smirnov
2017-03-06 22:53 ` [PATCH 39/45] usb: ehci-atmel: Zero ehci_data before using it Andrey Smirnov
2017-03-06 22:53 ` [PATCH 40/45] usb: echi-atmel: Check result of ehci_register() Andrey Smirnov
2017-03-06 22:53 ` [PATCH 41/45] usb: echi-atmel: Add DT support Andrey Smirnov
2017-03-06 22:53 ` [PATCH 42/45] at91sam9x5ek: Configure USB in DT Andrey Smirnov
2017-03-06 22:53 ` [PATCH 43/45] net: macb: Add DT support Andrey Smirnov
2017-03-06 22:53 ` [PATCH 44/45] at91sam9x5ek: Configure Ethernet in DT Andrey Smirnov
2017-03-06 22:53 ` [PATCH 45/45] at91sam9x5ek: Configure NAND " Andrey Smirnov
2017-03-07  8:13 ` [PATCH 00/45] AT91, at91sam9x5ek updates Sascha Hauer
2017-03-07 21:09   ` Andrey Smirnov
2017-03-07 16:34 ` Sam Ravnborg
2017-03-07 16:56   ` Jean-Christophe PLAGNIOL-VILLARD
2017-03-07 20:58     ` Sam Ravnborg
2017-03-07 21:18       ` Andrey Smirnov
2017-03-07 21:47         ` Jean-Christophe PLAGNIOL-VILLARD

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