From: Mark Brown <broonie@kernel.org>
To: Lars Povlsen <lars.povlsen@microchip.com>
Cc: devicetree@vger.kernel.org,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org,
SoC Team <soc@kernel.org>,
Microchip Linux Driver Support <UNGLinuxDriver@microchip.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 07/10] spi: spi-dw-mchp: Add Sparx5 support
Date: Thu, 14 May 2020 11:25:16 +0100 [thread overview]
Message-ID: <20200514102516.GD5127@sirena.org.uk> (raw)
In-Reply-To: <20200513140031.25633-8-lars.povlsen@microchip.com>
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On Wed, May 13, 2020 at 04:00:28PM +0200, Lars Povlsen wrote:
> +static void dw_spi_mchp_set_cs_owner(struct dw_spi_mchp *dwsmchp,
> + const struct dw_spi_mchp_props *props,
> + u8 cs, u8 owner)
> {
> + u8 dummy = (owner == MSCC_IF_SI_OWNER_SIBM ?
> + MSCC_IF_SI_OWNER_SIMC : MSCC_IF_SI_OWNER_SIBM);
Please write normal conditional statements to improve legibility.
> +static void dw_spi_mchp_set_cs(struct spi_device *spi, bool nEnable)
> +{
> + bool enable = !nEnable; /* This keeps changing in the API... */
No, it doesn't. The API has not changed for more than a decade.
> + } else if (props->ss_force_ena_off) {
> + if (enable) {
> + /* Ensure CS toggles, so start off all disabled */
> + regmap_write(dwsmchp->syscon, props->ss_force_val_off,
> + ~0);
What's all this force_ena_off stuff about? The controller should not be
making decisions about management of the chip select, this will break
users.
> + if (pdev->dev.of_node) {
> + int i;
> +
> + for (i = 0; i < dws->num_cs; i++) {
> + int cs_gpio = of_get_named_gpio(pdev->dev.of_node,
> + "cs-gpios", i);
> +
> + if (cs_gpio == -EPROBE_DEFER) {
> + ret = cs_gpio;
> + goto out;
> + }
> +
> + if (gpio_is_valid(cs_gpio)) {
> + ret = devm_gpio_request(&pdev->dev, cs_gpio,
> + dev_name(&pdev->dev));
> + if (ret)
> + goto out;
Set use_gpio_descriptors and let the core manage the GPIO.
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next prev parent reply other threads:[~2020-05-14 10:25 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-13 14:00 [PATCH 00/10] spi: Adding support for Microchip Sparx5 SoC Lars Povlsen
2020-05-13 14:00 ` [PATCH 01/10] spi: dw: Add support for polled operation via no IRQ specified in DT Lars Povlsen
2020-05-13 14:20 ` Mark Brown
2020-05-14 13:04 ` Serge Semin
2020-05-15 9:11 ` Lars Povlsen
2020-05-13 14:37 ` Mark Brown
2020-05-19 10:21 ` Lars Povlsen
2020-05-13 14:55 ` Andy Shevchenko
2020-05-19 10:25 ` Lars Povlsen
2020-06-02 19:10 ` Serge Semin
2020-06-09 9:13 ` Lars Povlsen
2020-05-13 14:00 ` [PATCH 02/10] spi: dw: Add support for RX sample delay register Lars Povlsen
2020-06-02 19:39 ` Serge Semin
2020-06-09 10:04 ` Lars Povlsen
2020-05-13 14:00 ` [PATCH 03/10] spi: dw: Add support for client driver memory operations Lars Povlsen
2020-05-13 14:00 ` [PATCH 04/10] dt-bindings: spi: Add bindings for spi-dw-mchp Lars Povlsen
2020-05-13 14:52 ` Mark Brown
2020-05-19 11:47 ` Lars Povlsen
2020-05-19 11:58 ` Mark Brown
2020-05-19 12:10 ` Lars Povlsen
2020-06-02 19:49 ` Serge Semin
2020-06-09 10:27 ` Lars Povlsen
2020-05-13 14:00 ` [PATCH 05/10] spi: spi-dw-mmio: Spin off MSCC platforms into spi-dw-mchp Lars Povlsen
2020-05-13 15:18 ` Mark Brown
2020-05-19 12:05 ` Lars Povlsen
2020-06-02 21:12 ` Serge Semin
2020-06-10 14:28 ` Lars Povlsen
2020-05-13 14:00 ` [PATCH 06/10] dt-bindings: spi: spi-dw-mchp: Add Sparx5 support Lars Povlsen
2020-05-13 15:25 ` Mark Brown
2020-06-02 23:07 ` Serge Semin
2020-06-10 12:27 ` Lars Povlsen
2020-05-13 14:00 ` [PATCH 07/10] " Lars Povlsen
2020-05-14 10:25 ` Mark Brown [this message]
2020-05-19 9:29 ` Lars Povlsen
2020-06-02 23:22 ` Serge Semin
2020-05-13 14:00 ` [PATCH 08/10] arm64: dts: sparx5: Add SPI controller Lars Povlsen
2020-05-13 14:00 ` [PATCH 09/10] arm64: dts: sparx5: Add spi-nor support Lars Povlsen
2020-05-13 14:00 ` [PATCH 10/10] arm64: dts: sparx5: Add spi-nand devices Lars Povlsen
2020-05-29 16:21 ` [PATCH 00/10] spi: Adding support for Microchip Sparx5 SoC Serge Semin
2020-06-02 8:18 ` Lars Povlsen
2020-06-02 8:21 ` Serge Semin
2020-06-02 9:56 ` Mark Brown
2020-06-02 23:44 ` Serge Semin
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