1 From b9c998eb7735df8000cf48d77f9271823e8e73da Mon Sep 17 00:00:00 2001
2 From: Ram Chandra Jangir <rjangi@codeaurora.org>
3 Date: Thu, 9 Mar 2017 09:39:05 +0100
4 Subject: [PATCH 68/69] spi: add gpio cs support
6 Signed-off-by: John Crispin <john@phrozen.org>
8 drivers/spi/spi-qup.c | 38 ++++++++++++++++++++++++++++++++++++++
9 1 file changed, 38 insertions(+)
11 --- a/drivers/spi/spi-qup.c
12 +++ b/drivers/spi/spi-qup.c
14 #include <linux/spi/spi.h>
15 #include <linux/dmaengine.h>
16 #include <linux/dma-mapping.h>
17 +#include <linux/gpio.h>
19 #define QUP_CONFIG 0x0000
20 #define QUP_STATE 0x0004
21 @@ -1019,6 +1020,38 @@ err_tx:
25 +static void spi_qup_set_cs(struct spi_device *spi, bool val)
27 + struct spi_qup *controller;
31 + controller = spi_master_get_devdata(spi->master);
32 + spi_ioc = readl_relaxed(controller->base + SPI_IO_CONTROL);
33 + spi_ioc_orig = spi_ioc;
35 + spi_ioc |= SPI_IO_C_FORCE_CS;
37 + spi_ioc &= ~SPI_IO_C_FORCE_CS;
39 + if (spi_ioc != spi_ioc_orig)
40 + writel_relaxed(spi_ioc, controller->base + SPI_IO_CONTROL);
43 +static int spi_qup_setup(struct spi_device *spi)
45 + if (spi->cs_gpio >= 0) {
46 + if (spi->mode & SPI_CS_HIGH)
47 + gpio_set_value(spi->cs_gpio, 0);
49 + gpio_set_value(spi->cs_gpio, 1);
57 static int spi_qup_probe(struct platform_device *pdev)
59 struct spi_master *master;
60 @@ -1115,6 +1148,11 @@ static int spi_qup_probe(struct platform
61 if (of_device_is_compatible(dev->of_node, "qcom,spi-qup-v1.1.1"))
62 controller->qup_v1 = 1;
64 + if (!controller->qup_v1)
65 + master->set_cs = spi_qup_set_cs;
67 + master->setup = spi_qup_setup;
69 spin_lock_init(&controller->lock);
70 init_completion(&controller->done);
71 init_completion(&controller->dma_tx_done);