Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933520AbaFQO5o (ORCPT ); Tue, 17 Jun 2014 10:57:44 -0400 Received: from mirror2.csie.ntu.edu.tw ([140.112.30.76]:41388 "EHLO mirror2.csie.ntu.edu.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933167AbaFQOx3 (ORCPT ); Tue, 17 Jun 2014 10:53:29 -0400 From: Chen-Yu Tsai To: Greg Kroah-Hartman , Samuel Ortiz , Lee Jones , Maxime Ripard , Rob Herring , Mike Turquette , Emilio Lopez , Linus Walleij Cc: Chen-Yu Tsai , linux-serial@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@googlegroups.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Boris BREZILLON , Luc Verhaegen Subject: [PATCH v2 12/20] clk: sunxi: Add A23 APB0 support to sun6i-a31-apb0-clk Date: Tue, 17 Jun 2014 22:52:49 +0800 Message-Id: <1403016777-15121-13-git-send-email-wens@csie.org> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1403016777-15121-1-git-send-email-wens@csie.org> References: <1403016777-15121-1-git-send-email-wens@csie.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The A23 has an almost identical PRCM clock tree. The difference in the APB0 clock is the smallest divisor is 1, instead of 2. This patch extends the sun6i-a31-apb0-clk driver to take divider tables associated to compatibles, and adds a compatible for the A23 variant. Signed-off-by: Chen-Yu Tsai --- Documentation/devicetree/bindings/clock/sunxi.txt | 1 + drivers/clk/sunxi/clk-sun6i-apb0.c | 28 ++++++++++++++++++----- 2 files changed, 23 insertions(+), 6 deletions(-) diff --git a/Documentation/devicetree/bindings/clock/sunxi.txt b/Documentation/devicetree/bindings/clock/sunxi.txt index af9e47d..e3a47ec 100644 --- a/Documentation/devicetree/bindings/clock/sunxi.txt +++ b/Documentation/devicetree/bindings/clock/sunxi.txt @@ -28,6 +28,7 @@ Required properties: "allwinner,sun8i-a23-ahb1-gates-clk" - for the AHB1 gates on A23 "allwinner,sun4i-a10-apb0-clk" - for the APB0 clock "allwinner,sun6i-a31-apb0-clk" - for the APB0 clock on A31 + "allwinner,sun8i-a23-apb0-clk" - for the APB0 clock on A23 "allwinner,sun4i-a10-apb0-gates-clk" - for the APB0 gates on A10 "allwinner,sun5i-a13-apb0-gates-clk" - for the APB0 gates on A13 "allwinner,sun5i-a10s-apb0-gates-clk" - for the APB0 gates on A10s diff --git a/drivers/clk/sunxi/clk-sun6i-apb0.c b/drivers/clk/sunxi/clk-sun6i-apb0.c index 11f17c3..2197ac7 100644 --- a/drivers/clk/sunxi/clk-sun6i-apb0.c +++ b/drivers/clk/sunxi/clk-sun6i-apb0.c @@ -11,6 +11,7 @@ #include #include #include +#include #include /* @@ -28,6 +29,21 @@ static const struct clk_div_table sun6i_a31_apb0_divs[] = { { /* sentinel */ }, }; +/* The A23 APB0 clock has a standard power of 2 divisor */ +static const struct clk_div_table sun8i_a23_apb0_divs[] = { + { .val = 0, .div = 1, }, + { .val = 1, .div = 2, }, + { .val = 2, .div = 4, }, + { .val = 3, .div = 8, }, + { /* sentinel */ }, +}; + +const struct of_device_id sun6i_a31_apb0_clk_dt_ids[] = { + { .compatible = "allwinner,sun6i-a31-apb0-clk", .data = &sun6i_a31_apb0_divs }, + { .compatible = "allwinner,sun8i-a23-apb0-clk", .data = &sun8i_a23_apb0_divs }, + { /* sentinel */ } +}; + static int sun6i_a31_apb0_clk_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -36,12 +52,17 @@ static int sun6i_a31_apb0_clk_probe(struct platform_device *pdev) struct resource *r; void __iomem *reg; struct clk *clk; + const struct of_device_id *device; r = platform_get_resource(pdev, IORESOURCE_MEM, 0); reg = devm_ioremap_resource(&pdev->dev, r); if (IS_ERR(reg)) return PTR_ERR(reg); + device = of_match_device(sun6i_a31_apb0_clk_dt_ids, &pdev->dev); + if (!device) + return -EINVAL; + clk_parent = of_clk_get_parent_name(np, 0); if (!clk_parent) return -EINVAL; @@ -49,7 +70,7 @@ static int sun6i_a31_apb0_clk_probe(struct platform_device *pdev) of_property_read_string(np, "clock-output-names", &clk_name); clk = clk_register_divider_table(&pdev->dev, clk_name, clk_parent, - 0, reg, 0, 2, 0, sun6i_a31_apb0_divs, + 0, reg, 0, 2, 0, device->data, NULL); if (IS_ERR(clk)) return PTR_ERR(clk); @@ -57,11 +78,6 @@ static int sun6i_a31_apb0_clk_probe(struct platform_device *pdev) return of_clk_add_provider(np, of_clk_src_simple_get, clk); } -const struct of_device_id sun6i_a31_apb0_clk_dt_ids[] = { - { .compatible = "allwinner,sun6i-a31-apb0-clk" }, - { /* sentinel */ } -}; - static struct platform_driver sun6i_a31_apb0_clk_driver = { .driver = { .name = "sun6i-a31-apb0-clk", -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/