diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2019-04-03 18:08:52 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-04-04 09:00:47 +0300 |
| commit | 9fda6693335cd51b0a74cffaac266c83439f7efe (patch) | |
| tree | 0fc3b0ee927125bb11444fb6f37728666294c95c /drivers/spi | |
| parent | 1a8fa5166ec53927e2c978bce9a107c9f8d5bf60 (diff) | |
| download | linux-9fda6693335cd51b0a74cffaac266c83439f7efe.tar.xz | |
spi: sh-msiof: Convert to use GPIO descriptors
Convert GPIO chip selects in the Renesas MSIOF SPI driver from legacy
GPIO numbers to GPIO descriptors.
Notes:
- The board file for the SH7724-based Ecovec24 development board now
registers a GPIO descriptor lookup, instead of passing a GPIO number
through controller_data,
- sh_msiof_get_cs_gpios() must release all GPIOs, else
spi_get_gpio_descs() cannot claim them during SPI controller
registration.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-sh-msiof.c | 20 |
1 files changed, 4 insertions, 16 deletions
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index d3794499915c..6aab7b2136db 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -549,25 +549,11 @@ static void sh_msiof_spi_read_fifo_s32u(struct sh_msiof_spi_priv *p, static int sh_msiof_spi_setup(struct spi_device *spi) { - struct device_node *np = spi->controller->dev.of_node; struct sh_msiof_spi_priv *p = spi_controller_get_devdata(spi->controller); u32 clr, set, tmp; - if (!np) { - /* - * Use spi->controller_data for CS (same strategy as spi_gpio), - * if any. otherwise let HW control CS - */ - spi->cs_gpio = (uintptr_t)spi->controller_data; - } - - if (gpio_is_valid(spi->cs_gpio)) { - gpio_direction_output(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH)); - return 0; - } - - if (spi_controller_is_slave(p->ctlr)) + if (spi->cs_gpiod || spi_controller_is_slave(p->ctlr)) return 0; if (p->native_cs_inited && @@ -600,7 +586,7 @@ static int sh_msiof_prepare_message(struct spi_controller *ctlr, u32 ss, cs_high; /* Configure pins before asserting CS */ - if (gpio_is_valid(spi->cs_gpio)) { + if (spi->cs_gpiod) { ss = p->unused_ss; cs_high = p->native_cs_high; } else { @@ -1156,6 +1142,7 @@ static int sh_msiof_get_cs_gpios(struct sh_msiof_spi_priv *p) gpiod = devm_gpiod_get_index(dev, "cs", i, GPIOD_ASIS); if (!IS_ERR(gpiod)) { + devm_gpiod_put(dev, gpiod); cs_gpios++; continue; } @@ -1407,6 +1394,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) ctlr->bits_per_word_mask = chipdata->bits_per_word_mask; ctlr->auto_runtime_pm = true; ctlr->transfer_one = sh_msiof_transfer_one; + ctlr->use_gpio_descriptors = true; ret = sh_msiof_request_dma(p); if (ret < 0) |