From: Andy Shevchenko Date: Tue, 19 May 2020 12:50:43 +0000 (+0300) Subject: i2c: designware: Drop hard coded FIFO depth assignment X-Git-Tag: v5.10.7~2313^2~35 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3f35064a7cfef4ed8d25cdb16da0abfbbd525f63;p=platform%2Fkernel%2Flinux-rpi.git i2c: designware: Drop hard coded FIFO depth assignment It's not clear why the commit fe20ff5c7e9c ("i2c-designware: Add support for Designware core behind PCI devices.") followed by commit b61b14154b19 ("i2c-designware: add support for Intel Lynxpoint") chose to hard code FIFO depth size. The FIFO depth on all hardware, I have tested on, can be nicely detected automatically. Thus, we may safely drop hard coded FIFO sizes from the driver. Signed-off-by: Andy Shevchenko Acked-by: Jarkko Nikula Signed-off-by: Wolfram Sang --- diff --git a/drivers/i2c/busses/i2c-designware-common.c b/drivers/i2c/busses/i2c-designware-common.c index e1697ed..ed30234 100644 --- a/drivers/i2c/busses/i2c-designware-common.c +++ b/drivers/i2c/busses/i2c-designware-common.c @@ -200,9 +200,6 @@ int i2c_dw_acpi_configure(struct device *device) struct i2c_timings *t = &dev->timings; u32 ss_ht = 0, fp_ht = 0, hs_ht = 0, fs_ht = 0; - dev->tx_fifo_depth = 32; - dev->rx_fifo_depth = 32; - /* * Try to get SDA hold time and *CNT values from an ACPI method for * selected speed modes. diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c index 3664d76..11a5e47 100644 --- a/drivers/i2c/busses/i2c-designware-pcidrv.c +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c @@ -46,8 +46,6 @@ struct dw_scl_sda_cfg { struct dw_pci_controller { u32 bus_num; - u32 tx_fifo_depth; - u32 rx_fifo_depth; u32 flags; struct dw_scl_sda_cfg *scl_sda_cfg; int (*setup)(struct pci_dev *pdev, struct dw_pci_controller *c); @@ -133,41 +131,29 @@ static u32 ehl_get_clk_rate_khz(struct dw_i2c_dev *dev) static struct dw_pci_controller dw_pci_controllers[] = { [medfield] = { .bus_num = -1, - .tx_fifo_depth = 32, - .rx_fifo_depth = 32, .setup = mfld_setup, .get_clk_rate_khz = mfld_get_clk_rate_khz, }, [merrifield] = { .bus_num = -1, - .tx_fifo_depth = 64, - .rx_fifo_depth = 64, .scl_sda_cfg = &mrfld_config, .setup = mrfld_setup, }, [baytrail] = { .bus_num = -1, - .tx_fifo_depth = 32, - .rx_fifo_depth = 32, .scl_sda_cfg = &byt_config, }, [haswell] = { .bus_num = -1, - .tx_fifo_depth = 32, - .rx_fifo_depth = 32, .scl_sda_cfg = &hsw_config, }, [cherrytrail] = { .bus_num = -1, - .tx_fifo_depth = 32, - .rx_fifo_depth = 32, .flags = MODEL_CHERRYTRAIL, .scl_sda_cfg = &byt_config, }, [elkhartlake] = { .bus_num = -1, - .tx_fifo_depth = 32, - .rx_fifo_depth = 32, .get_clk_rate_khz = ehl_get_clk_rate_khz, }, }; @@ -277,9 +263,6 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev, dev->sda_hold_time = cfg->sda_hold; } - dev->tx_fifo_depth = controller->tx_fifo_depth; - dev->rx_fifo_depth = controller->rx_fifo_depth; - adap = &dev->adapter; adap->owner = THIS_MODULE; adap->class = 0;