From b5be3aacceef8be15a5ae1aed15686acd9d8c610 Mon Sep 17 00:00:00 2001
From: Sasirekaa Madhesu <smadhesu@codeaurora.org>
Date: Mon, 12 Mar 2018 17:10:42 +0530
Subject: [PATCH] ipq40xx: Disable audio clock registers in u-boot

Change-Id: I83f208324c00b775ef518b69494317f2b44a4aba
Signed-off-by: Sasirekaa Madhesu <smadhesu@codeaurora.org>
---
 board/qca/arm/common/board_init.c |  6 ++++++
 board/qca/arm/ipq40xx/ipq40xx.c   | 28 ++++++++++++++++++++++++++++
 board/qca/arm/ipq40xx/ipq40xx.h   |  2 ++
 3 files changed, 36 insertions(+)

diff --git a/board/qca/arm/common/board_init.c b/board/qca/arm/common/board_init.c
index 55fc612f32..fb295f00e3 100644
--- a/board/qca/arm/common/board_init.c
+++ b/board/qca/arm/common/board_init.c
@@ -56,6 +56,11 @@ void board_pci_deinit(void)
 {
 	return 0;
 }
+__weak
+void disable_audio_clks(void)
+{
+	return 0;
+}
 
 int board_init(void)
 {
@@ -172,6 +177,7 @@ int board_init(void)
 	}
 
 	aquantia_phy_reset_init();
+	disable_audio_clks();
 
 	return 0;
 }
diff --git a/board/qca/arm/ipq40xx/ipq40xx.c b/board/qca/arm/ipq40xx/ipq40xx.c
index c29dc3ea83..eb436f75e4 100644
--- a/board/qca/arm/ipq40xx/ipq40xx.c
+++ b/board/qca/arm/ipq40xx/ipq40xx.c
@@ -45,6 +45,15 @@ qca_mmc mmc_host;
 struct sdhci_host mmc_host;
 #endif
 
+#define ADSS_AUDIO_RXM_CBCR_REG			0x0770012C
+#define ADSS_AUDIO_RXB_CBCR_REG			0x0770010C
+#define ADSS_AUDIO_TXB_CBCR_REG			0x0770014C
+#define ADSS_AUDIO_SPDIF_CBCR_REG		0x07700154
+#define ADSS_AUDIO_SPDIF_DIV2_CBCR_REG		0x0770015C
+#define ADSS_AUDIO_TXM_CBCR_REG			0x0770016C
+#define ADSS_AUDIO_PCM_CBCR_REG			0x077001AC
+#define ADSS_AUDIO_SPDIF_IN_FAST_CBCR_REG	0x077001EC
+
 const char *rsvd_node = "/reserved-memory";
 const char *del_node[] = {"rsvd1",
 			  "rsvd2",
@@ -349,6 +358,25 @@ void board_pci_deinit(void)
 	pcie_clock_disable(GCC_PCIE_AHB_CBCR);
 }
 
+/*
+ * The audio block is out of reset by default due to which the
+ * audio clock blocks are also turned on. When audio TLMM is
+ * enabled in kernel, the clocks will also be available at the
+ * pins which causes pop noise during kernel bootup.
+ * To avoid this, the clocks are turned off in u-boot.
+ */
+void disable_audio_clks(void)
+{
+	writel(0, ADSS_AUDIO_RXM_CBCR_REG);
+	writel(0, ADSS_AUDIO_RXB_CBCR_REG);
+	writel(0, ADSS_AUDIO_TXB_CBCR_REG);
+	writel(0, ADSS_AUDIO_SPDIF_CBCR_REG);
+	writel(0, ADSS_AUDIO_SPDIF_DIV2_CBCR_REG);
+	writel(0, ADSS_AUDIO_TXM_CBCR_REG);
+	writel(0, ADSS_AUDIO_PCM_CBCR_REG);
+	writel(0, ADSS_AUDIO_SPDIF_IN_FAST_CBCR_REG);
+}
+
 void ipq_fdt_fixup_socinfo(void *blob)
 {
 	return;
diff --git a/board/qca/arm/ipq40xx/ipq40xx.h b/board/qca/arm/ipq40xx/ipq40xx.h
index a14231de1f..30aa757355 100644
--- a/board/qca/arm/ipq40xx/ipq40xx.h
+++ b/board/qca/arm/ipq40xx/ipq40xx.h
@@ -81,6 +81,8 @@ __weak int ipq_get_tz_version(char *version_name, int buf_size)
 	return 1;
 }
 
+void disable_audio_clks(void);
+
 /* Board specific parameters */
 typedef struct {
 	unsigned int machid;