From 7ab2463550e2a3a5b97dfa82e5bf8038b986f007 Mon Sep 17 00:00:00 2001 From: Jonas Gorski Date: Wed, 1 Mar 2017 10:08:14 +0100 Subject: [PATCH] spi/bcm63xx-hsspi: allow for probing through devicetree Add required binding support to probe through device tree. Signed-off-by: Jonas Gorski Acked-by: Florian Fainelli Signed-off-by: Mark Brown --- drivers/spi/spi-bcm63xx-hsspi.c | 23 ++++++++++++++++++++--- 1 file changed, 20 insertions(+), 3 deletions(-) diff --git a/drivers/spi/spi-bcm63xx-hsspi.c b/drivers/spi/spi-bcm63xx-hsspi.c index 79096d17ebde..5514cd02e93a 100644 --- a/drivers/spi/spi-bcm63xx-hsspi.c +++ b/drivers/spi/spi-bcm63xx-hsspi.c @@ -19,6 +19,7 @@ #include #include #include +#include #define HSSPI_GLOBAL_CTRL_REG 0x0 #define GLOBAL_CTRL_CS_POLARITY_SHIFT 0 @@ -91,6 +92,7 @@ #define HSSPI_MAX_SYNC_CLOCK 30000000 +#define HSSPI_SPI_MAX_CS 8 #define HSSPI_BUS_NUM 1 /* 0 is legacy SPI */ struct bcm63xx_hsspi { @@ -332,7 +334,7 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct clk *clk; int irq, ret; - u32 reg, rate; + u32 reg, rate, num_cs = HSSPI_SPI_MAX_CS; irq = platform_get_irq(pdev, 0); if (irq < 0) { @@ -382,8 +384,17 @@ static int bcm63xx_hsspi_probe(struct platform_device *pdev) mutex_init(&bs->bus_mutex); init_completion(&bs->done); - master->bus_num = HSSPI_BUS_NUM; - master->num_chipselect = 8; + master->dev.of_node = dev->of_node; + if (!dev->of_node) + master->bus_num = HSSPI_BUS_NUM; + + of_property_read_u32(dev->of_node, "num-cs", &num_cs); + if (num_cs > 8) { + dev_warn(dev, "unsupported number of cs (%i), reducing to 8\n", + num_cs); + num_cs = HSSPI_SPI_MAX_CS; + } + master->num_chipselect = num_cs; master->setup = bcm63xx_hsspi_setup; master->transfer_one_message = bcm63xx_hsspi_transfer_one; master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | @@ -469,10 +480,16 @@ static int bcm63xx_hsspi_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(bcm63xx_hsspi_pm_ops, bcm63xx_hsspi_suspend, bcm63xx_hsspi_resume); +static const struct of_device_id bcm63xx_hsspi_of_match[] = { + { .compatible = "brcm,bcm6328-hsspi", }, + { }, +}; + static struct platform_driver bcm63xx_hsspi_driver = { .driver = { .name = "bcm63xx-hsspi", .pm = &bcm63xx_hsspi_pm_ops, + .of_match_table = bcm63xx_hsspi_of_match, }, .probe = bcm63xx_hsspi_probe, .remove = bcm63xx_hsspi_remove,