From patchwork Mon Jun 8 09:59:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 11592945 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2270113B1 for ; Mon, 8 Jun 2020 09:59:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 12A482076A for ; Mon, 8 Jun 2020 09:59:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729337AbgFHJ7r (ORCPT ); Mon, 8 Jun 2020 05:59:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57104 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729259AbgFHJ7p (ORCPT ); Mon, 8 Jun 2020 05:59:45 -0400 Received: from michel.telenet-ops.be (michel.telenet-ops.be [IPv6:2a02:1800:110:4::f00:18]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07A04C08C5C5 for ; Mon, 8 Jun 2020 02:59:44 -0700 (PDT) Received: from ramsan ([IPv6:2a02:1810:ac12:ed60:c85f:a5bf:b1bd:702b]) by michel.telenet-ops.be with bizsmtp id oZzi2200M0R8aca06Zzior; Mon, 08 Jun 2020 11:59:42 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan with esmtp (Exim 4.90_1) (envelope-from ) id 1jiEZC-0007PN-JS; Mon, 08 Jun 2020 11:59:42 +0200 Received: from geert by rox.of.borg with local (Exim 4.90_1) (envelope-from ) id 1jiEZC-0007xR-Ho; Mon, 08 Jun 2020 11:59:42 +0200 From: Geert Uytterhoeven To: Mark Brown Cc: Chris Brandt , linux-spi@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-sh@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH 8/8] spi: rspi: Fill in controller speed limits Date: Mon, 8 Jun 2020 11:59:40 +0200 Message-Id: <20200608095940.30516-9-geert+renesas@glider.be> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200608095940.30516-1-geert+renesas@glider.be> References: <20200608095940.30516-1-geert+renesas@glider.be> Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Fill in the controller speed limits, so the SPI core can use them for validating SPI transfers, and adjusting them where needed. Signed-off-by: Geert Uytterhoeven --- drivers/spi/spi-rspi.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 2b5334e22ae421b5..e39fd38f5180efb3 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -243,6 +243,8 @@ struct spi_ops { int (*transfer_one)(struct spi_controller *ctlr, struct spi_device *spi, struct spi_transfer *xfer); u16 extra_mode_bits; + u16 min_div; + u16 max_div; u16 flags; u16 fifo_size; u8 num_hw_ss; @@ -1181,6 +1183,8 @@ static int rspi_remove(struct platform_device *pdev) static const struct spi_ops rspi_ops = { .set_config_register = rspi_set_config_register, .transfer_one = rspi_transfer_one, + .min_div = 2, + .max_div = 4096, .flags = SPI_CONTROLLER_MUST_TX, .fifo_size = 8, .num_hw_ss = 2, @@ -1189,6 +1193,8 @@ static const struct spi_ops rspi_ops = { static const struct spi_ops rspi_rz_ops = { .set_config_register = rspi_rz_set_config_register, .transfer_one = rspi_rz_transfer_one, + .min_div = 2, + .max_div = 4096, .flags = SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX, .fifo_size = 8, /* 8 for TX, 32 for RX */ .num_hw_ss = 1, @@ -1199,6 +1205,8 @@ static const struct spi_ops qspi_ops = { .transfer_one = qspi_transfer_one, .extra_mode_bits = SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD, + .min_div = 1, + .max_div = 4080, .flags = SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX, .fifo_size = 32, .num_hw_ss = 1, @@ -1260,6 +1268,7 @@ static int rspi_probe(struct platform_device *pdev) int ret; const struct rspi_plat_data *rspi_pd; const struct spi_ops *ops; + unsigned long clksrc; ctlr = spi_alloc_master(&pdev->dev, sizeof(struct rspi_data)); if (ctlr == NULL) @@ -1312,6 +1321,9 @@ static int rspi_probe(struct platform_device *pdev) ctlr->unprepare_message = rspi_unprepare_message; ctlr->mode_bits = SPI_CPHA | SPI_CPOL | SPI_CS_HIGH | SPI_LSB_FIRST | SPI_LOOP | ops->extra_mode_bits; + clksrc = clk_get_rate(rspi->clk); + ctlr->min_speed_hz = DIV_ROUND_UP(clksrc, ops->max_div); + ctlr->max_speed_hz = DIV_ROUND_UP(clksrc, ops->min_div); ctlr->flags = ops->flags; ctlr->dev.of_node = pdev->dev.of_node; ctlr->use_gpio_descriptors = true;