From 0d3f073975ad28bd16034ed81b8e525e808cbe37 Mon Sep 17 00:00:00 2001 From: Gregor Herburger Date: Mon, 11 Nov 2024 15:10:32 +0100 Subject: [PATCH] mfd: tqmx86: Add I2C IRQ support The i2c-ocores controller can run in interrupt mode on tqmx86 modules. Add a module parameter to allow configuring the IRQ number, similar to the handling of the GPIO IRQ. The new code and module parameter refer to the I2C controller as "I2C1", as the TQMx86 PLD actually contains a second I2C controller, for which driver support will be added in the future. Signed-off-by: Gregor Herburger Signed-off-by: Matthias Schiffer Link: https://lore.kernel.org/r/c1b0769e00a8a4e463cffe725e939b0e5c2992c8.1731325758.git.matthias.schiffer@ew.tq-group.com Signed-off-by: Lee Jones --- drivers/mfd/tqmx86.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) diff --git a/drivers/mfd/tqmx86.c b/drivers/mfd/tqmx86.c index d2704526f9d4..1cba3b67b0fb 100644 --- a/drivers/mfd/tqmx86.c +++ b/drivers/mfd/tqmx86.c @@ -50,6 +50,7 @@ #define TQMX86_REG_IO_EXT_INT_9 2 #define TQMX86_REG_IO_EXT_INT_12 3 #define TQMX86_REG_IO_EXT_INT_MASK 0x3 +#define TQMX86_REG_IO_EXT_INT_I2C1_SHIFT 0 #define TQMX86_REG_IO_EXT_INT_GPIO_SHIFT 4 #define TQMX86_REG_SAUC 0x17 @@ -60,8 +61,19 @@ static uint gpio_irq; module_param(gpio_irq, uint, 0); MODULE_PARM_DESC(gpio_irq, "GPIO IRQ number (valid parameters: 7, 9, 12)"); -static const struct resource tqmx_i2c_soft_resources[] = { - DEFINE_RES_IO(TQMX86_IOBASE_I2C, TQMX86_IOSIZE_I2C), +static uint i2c1_irq; +module_param(i2c1_irq, uint, 0); +MODULE_PARM_DESC(i2c1_irq, "I2C1 IRQ number (valid parameters: 7, 9, 12)"); + +enum tqmx86_i2c1_resource_type { + TQMX86_I2C1_IO, + TQMX86_I2C1_IRQ, +}; + +static struct resource tqmx_i2c_soft_resources[] = { + [TQMX86_I2C1_IO] = DEFINE_RES_IO(TQMX86_IOBASE_I2C, TQMX86_IOSIZE_I2C), + /* Placeholder for IRQ resource */ + [TQMX86_I2C1_IRQ] = {}, }; static const struct resource tqmx_watchdog_resources[] = { @@ -264,6 +276,13 @@ static int tqmx86_probe(struct platform_device *pdev) ocores_platform_data.clock_khz = tqmx86_board_id_to_clk_rate(dev, board_id); if (i2c_det == TQMX86_REG_I2C_DETECT_SOFT) { + if (i2c1_irq) { + err = tqmx86_setup_irq(dev, "I2C1", i2c1_irq, io_base, + TQMX86_REG_IO_EXT_INT_I2C1_SHIFT); + if (!err) + tqmx_i2c_soft_resources[TQMX86_I2C1_IRQ] = DEFINE_RES_IRQ(i2c1_irq); + } + err = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, tqmx86_i2c_soft_dev, ARRAY_SIZE(tqmx86_i2c_soft_dev),