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[37.60.189.18]) by smtp.gmail.com with ESMTPSA id l14sm13678787wrt.57.2019.05.28.09.14.56 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Tue, 28 May 2019 09:14:56 -0700 (PDT) From: =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= To: Mauro Carvalho Chehab , Rob Herring , Mark Rutland , Maxime Ripard , Chen-Yu Tsai Cc: linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com, =?UTF-8?q?Cl=C3=A9ment=20P=C3=A9ron?= Subject: [PATCH v3 02/12] media: rc: Introduce sunxi_ir_quirks Date: Tue, 28 May 2019 18:14:30 +0200 Message-Id: <20190528161440.27172-3-peron.clem@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190528161440.27172-1-peron.clem@gmail.com> References: <20190528161440.27172-1-peron.clem@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This driver is used in various Allwinner SoC with different configuration. Introduce a quirks struct to know the fifo size and if a reset is required. Signed-off-by: Clément Péron --- drivers/media/rc/sunxi-cir.c | 61 +++++++++++++++++++++++++++--------- 1 file changed, 47 insertions(+), 14 deletions(-) diff --git a/drivers/media/rc/sunxi-cir.c b/drivers/media/rc/sunxi-cir.c index 307e44714ea0..d02dcb6fd0a5 100644 --- a/drivers/media/rc/sunxi-cir.c +++ b/drivers/media/rc/sunxi-cir.c @@ -81,6 +81,17 @@ /* Time after which device stops sending data in ms */ #define SUNXI_IR_TIMEOUT 120 +/** + * struct sunxi_ir_quirks - Differences between SoC variants. + * + * @has_reset: SoC needs reset deasserted. + * @fifo_size: size of the fifo. + */ +struct sunxi_ir_quirks { + bool has_reset; + int fifo_size; +}; + struct sunxi_ir { spinlock_t ir_lock; struct rc_dev *rc; @@ -143,6 +154,7 @@ static int sunxi_ir_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *dn = dev->of_node; + const struct sunxi_ir_quirks *quirks; struct resource *res; struct sunxi_ir *ir; u32 b_clk_freq = SUNXI_IR_BASE_CLK; @@ -151,12 +163,15 @@ static int sunxi_ir_probe(struct platform_device *pdev) if (!ir) return -ENOMEM; + quirks = of_device_get_match_data(&pdev->dev); + if (quirks == NULL) { + dev_err(&pdev->dev, "Failed to determine the quirks to use\n"); + return -ENODEV; + } + spin_lock_init(&ir->ir_lock); - if (of_device_is_compatible(dn, "allwinner,sun5i-a13-ir")) - ir->fifo_size = 64; - else - ir->fifo_size = 16; + ir->fifo_size = quirks->fifo_size; /* Clock */ ir->apb_clk = devm_clk_get(dev, "apb"); @@ -173,13 +188,15 @@ static int sunxi_ir_probe(struct platform_device *pdev) /* Base clock frequency (optional) */ of_property_read_u32(dn, "clock-frequency", &b_clk_freq); - /* Reset (optional) */ - ir->rst = devm_reset_control_get_optional_exclusive(dev, NULL); - if (IS_ERR(ir->rst)) - return PTR_ERR(ir->rst); - ret = reset_control_deassert(ir->rst); - if (ret) - return ret; + /* Reset */ + if (quirks->has_reset) { + ir->rst = devm_reset_control_get_exclusive(dev, NULL); + if (IS_ERR(ir->rst)) + return PTR_ERR(ir->rst); + ret = reset_control_deassert(ir->rst); + if (ret) + return ret; + } ret = clk_set_rate(ir->clk, b_clk_freq); if (ret) { @@ -316,10 +333,26 @@ static int sunxi_ir_remove(struct platform_device *pdev) return 0; } +static const struct sunxi_ir_quirks sun4i_a10_ir_quirks = { + .has_reset = false, + .fifo_size = 16, +}; + +static const struct sunxi_ir_quirks sun5i_a13_ir_quirks = { + .has_reset = false, + .fifo_size = 64, +}; + static const struct of_device_id sunxi_ir_match[] = { - { .compatible = "allwinner,sun4i-a10-ir", }, - { .compatible = "allwinner,sun5i-a13-ir", }, - {}, + { + .compatible = "allwinner,sun4i-a10-ir", + .data = &sun4i_a10_ir_quirks, + }, + { + .compatible = "allwinner,sun5i-a13-ir", + .data = &sun5i_a13_ir_quirks, + }, + {} }; MODULE_DEVICE_TABLE(of, sunxi_ir_match); -- 2.20.1