linux-kernel - [PATCH] clk: ti: dra7xx: Reset the mcasp3_ahclkx

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Date:   Wed, 6 Sep 2017 16:06:39 +0530
From:   Keerthy <j-keerthy@...com>
To:     <sboyd@...eaurora.org>, <t-kristo@...com>
CC:     <linux-kernel@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <linux-omap@...r.kernel.org>, <tony@...mide.com>,
        <j-keerthy@...com>
Subject: [PATCH] clk: ti: dra7xx: Reset the mcasp3_ahclkx_mux clock value

Reset the mcasp3_ahclkx_mux to abe_24m_fclk. This is needed
in case of kexec where the reset values might be wiped off.

Signed-off-by: Keerthy <j-keerthy@...com>
---
 drivers/clk/ti/clk-7xx.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/ti/clk-7xx.c b/drivers/clk/ti/clk-7xx.c
index 9fd6043..2c3a36c 100644
--- a/drivers/clk/ti/clk-7xx.c
+++ b/drivers/clk/ti/clk-7xx.c
@@ -312,7 +312,7 @@
 int __init dra7xx_dt_clk_init(void)
 {
 	int rc;
-	struct clk *dpll_ck, *hdcp_ck;
+	struct clk *dpll_ck, *hdcp_ck, *mcasp3_ahclkx_ck, *abe_ck;
 
 	ti_dt_clocks_register(dra7xx_clks);
 
@@ -338,5 +338,12 @@ int __init dra7xx_dt_clk_init(void)
 	if (rc)
 		pr_err("%s: failed to set dss_deshdcp_clk\n", __func__);
 
+	mcasp3_ahclkx_ck = clk_get_sys(NULL, "mcasp3_ahclkx_mux");
+	abe_ck = clk_get_sys(NULL, "abe_24m_fclk");
+	rc = clk_set_parent(mcasp3_ahclkx_ck, abe_ck);
+	if (rc)
+		pr_err("%s: failed to set parent for mcasp3_ahclkx_mux\n",
+		       __func__);
+
 	return rc;
 }
-- 
1.9.1