From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hT783-0006pd-CN for barebox@lists.infradead.org; Tue, 21 May 2019 15:56:41 +0000 From: Ahmad Fatoum Date: Tue, 21 May 2019 17:56:24 +0200 Message-Id: <20190521155626.9906-4-a.fatoum@pengutronix.de> In-Reply-To: <20190521155626.9906-1-a.fatoum@pengutronix.de> References: <20190521155626.9906-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v2 3/5] clk: imx6: Mask mmdc_ch1 handshake for periph2_sel and mmdc_ch1_axi_podf To: barebox@lists.infradead.org Cc: pza@pengutronix.de, Ahmad Fatoum From: Philipp Zabel MMDC CH1 is not used on i.MX6Q, so the handshake needed to change the parent of periph2_sel or the divider of mmdc_ch1_axi_podf will never succeed. Disable the handshake mechanism to allow changing the frequency of mmdc_ch1_axi, allowing to use it as a possible source for the LDB DI clock. Signed-off-by: Philipp Zabel Signed-off-by: Fabio Estevam Signed-off-by: Shawn Guo [afa: ported to barebox from Linux commit f13abeff2c] [afa: moved call site to where it would've been moved in following commit] Signed-off-by: Ahmad Fatoum --- drivers/clk/imx/clk-imx6.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/clk/imx/clk-imx6.c b/drivers/clk/imx/clk-imx6.c index 01b649ebbd26..22f33aee03e9 100644 --- a/drivers/clk/imx/clk-imx6.c +++ b/drivers/clk/imx/clk-imx6.c @@ -299,6 +299,19 @@ static struct clk_div_table video_div_table[] = { { /* sentinel */ } }; +#define CCM_CCDR 0x04 + +#define CCDR_MMDC_CH1_MASK BIT(16) + +static void __init imx6q_mmdc_ch1_mask_handshake(void __iomem *ccm_base) +{ + unsigned int reg; + + reg = readl(ccm_base + CCM_CCDR); + reg |= CCDR_MMDC_CH1_MASK; + writel(reg, ccm_base + CCM_CCDR); +} + static void imx6_add_video_clks(void __iomem *anab, void __iomem *cb) { clks[IMX6QDL_CLK_PLL5_POST_DIV] = imx_clk_divider_table("pll5_post_div", "pll5_video", anab + 0xa0, 19, 2, post_div_table); @@ -307,6 +320,8 @@ static void imx6_add_video_clks(void __iomem *anab, void __iomem *cb) clks[IMX6QDL_CLK_IPU1_SEL] = imx_clk_mux("ipu1_sel", cb + 0x3c, 9, 2, ipu_sels, ARRAY_SIZE(ipu_sels)); clks[IMX6QDL_CLK_IPU2_SEL] = imx_clk_mux("ipu2_sel", cb + 0x3c, 14, 2, ipu_sels, ARRAY_SIZE(ipu_sels)); + imx6q_mmdc_ch1_mask_handshake(cb); + if (cpu_has_err009219()) { clks[IMX6QDL_CLK_LDB_DI0_SEL] = imx_clk_mux_ldb("ldb_di0_sel", cb + 0x2c, 9, 3, ldb_di_sels, ARRAY_SIZE(ldb_di_sels)); clks[IMX6QDL_CLK_LDB_DI1_SEL] = imx_clk_mux_ldb("ldb_di1_sel", cb + 0x2c, 12, 3, ldb_di_sels, ARRAY_SIZE(ldb_di_sels)); -- 2.20.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox