davinci: minor tnetv107x clock tree fixes

This patch applies the following modifications to the tnetv107x clock tree:

  - reparent tnetv107x usb clocks to usbss

  - mark timer1 as always enabled

  - enable set_rate on pll divider output clocks

  - adjust tnetv107x tsc sysclk rate lower to fix invalid reset defaults

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

2 files changed, 26 insertions, 12 deletions

diff --git a/arch/arm/mach-davinci/devices-tnetv107x.c b/arch/arm/mach-davinci/devices-tnetv107x.c
index c9a86d8130d1..85503debda51 100644
--- a/arch/arm/mach-davinci/devices-tnetv107x.c
+++ b/arch/arm/mach-davinci/devices-tnetv107x.c
@@ -344,7 +344,20 @@ static struct platform_device tsc_device = {
 
 void __init tnetv107x_devices_init(struct tnetv107x_device_info *info)
 {
-	int i;
+	int i, error;
+	struct clk *tsc_clk;
+
+	/*
+	 * The reset defaults for tnetv107x tsc clock divider is set too high.
+	 * This forces the clock down to a range that allows the ADC to
+	 * complete sample conversion in time.
+	 */
+	tsc_clk = clk_get(NULL, "sys_tsc_clk");
+	if (tsc_clk) {
+		error = clk_set_rate(tsc_clk, 5000000);
+		WARN_ON(error < 0);
+		clk_put(tsc_clk);
+	}
 
 	platform_device_register(&edma_device);
 	platform_device_register(&tnetv107x_wdt_device);
diff --git a/arch/arm/mach-davinci/tnetv107x.c b/arch/arm/mach-davinci/tnetv107x.c
index daeae06430b9..6fcdecec8d8c 100644
--- a/arch/arm/mach-davinci/tnetv107x.c
+++ b/arch/arm/mach-davinci/tnetv107x.c
@@ -131,12 +131,13 @@ define_pll_clk(tdm, 1, 0x0ff, 0x200);
 define_pll_clk(eth, 2, 0x0ff, 0x400);
 
 /* Level 2 - divided outputs from the PLLs */
-#define define_pll_div_clk(pll, cname, div)		\
-	static struct clk pll##_##cname##_clk = {	\
-		.name		= #pll "_" #cname "_clk",\
-		.parent		= &pll_##pll##_clk,	\
-		.flags		= CLK_PLL,		\
-		.div_reg	= PLLDIV##div,		\
+#define define_pll_div_clk(pll, cname, div)			\
+	static struct clk pll##_##cname##_clk = {		\
+		.name		= #pll "_" #cname "_clk",	\
+		.parent		= &pll_##pll##_clk,		\
+		.flags		= CLK_PLL,			\
+		.div_reg	= PLLDIV##div,			\
+		.set_rate	= davinci_set_sysclk_rate,	\
 	}
 
 define_pll_div_clk(sys, arm1176,	1);
@@ -192,6 +193,7 @@ lpsc_clk_enabled(system,	sys_half_clk,	SYSTEM);
 lpsc_clk_enabled(ddr2_vrst,	sys_ddr_clk,	DDR2_EMIF1_VRST);
 lpsc_clk_enabled(ddr2_vctl_rst,	sys_ddr_clk,	DDR2_EMIF2_VCTL_RST);
 lpsc_clk_enabled(wdt_arm,	sys_half_clk,	WDT_ARM);
+lpsc_clk_enabled(timer1,	sys_half_clk,	TIMER1);
 
 lpsc_clk(mbx_lite,	sys_arm1176_clk,	MBX_LITE);
 lpsc_clk(ethss,		eth_125mhz_clk,		ETHSS);
@@ -205,16 +207,15 @@ lpsc_clk(mdio,		sys_half_clk,		MDIO);
 lpsc_clk(sdio0,		sys_half_clk,		SDIO0);
 lpsc_clk(sdio1,		sys_half_clk,		SDIO1);
 lpsc_clk(timer0,	sys_half_clk,		TIMER0);
-lpsc_clk(timer1,	sys_half_clk,		TIMER1);
 lpsc_clk(wdt_dsp,	sys_half_clk,		WDT_DSP);
 lpsc_clk(ssp,		sys_half_clk,		SSP);
 lpsc_clk(tdm0,		tdm_0_clk,		TDM0);
 lpsc_clk(tdm1,		tdm_1_clk,		TDM1);
 lpsc_clk(vlynq,		sys_vlynq_ref_clk,	VLYNQ);
 lpsc_clk(mcdma,		sys_half_clk,		MCDMA);
-lpsc_clk(usb0,		sys_half_clk,		USB0);
-lpsc_clk(usb1,		sys_half_clk,		USB1);
 lpsc_clk(usbss,		sys_half_clk,		USBSS);
+lpsc_clk(usb0,		clk_usbss,		USB0);
+lpsc_clk(usb1,		clk_usbss,		USB1);
 lpsc_clk(ethss_rgmii,	eth_250mhz_clk,		ETHSS_RGMII);
 lpsc_clk(imcop,		sys_dsp_clk,		IMCOP);
 lpsc_clk(spare,		sys_half_clk,		SPARE);
@@ -281,7 +282,9 @@ static struct clk_lookup clks[] = {
 	CLK(NULL,		"clk_tdm0",		&clk_tdm0),
 	CLK(NULL,		"clk_vlynq",		&clk_vlynq),
 	CLK(NULL,		"clk_mcdma",		&clk_mcdma),
+	CLK(NULL,		"clk_usbss",		&clk_usbss),
 	CLK(NULL,		"clk_usb0",		&clk_usb0),
+	CLK(NULL,		"clk_usb1",		&clk_usb1),
 	CLK(NULL,		"clk_tdm1",		&clk_tdm1),
 	CLK(NULL,		"clk_debugss",		&clk_debugss),
 	CLK(NULL,		"clk_ethss_rgmii",	&clk_ethss_rgmii),
@@ -289,8 +292,6 @@ static struct clk_lookup clks[] = {
 	CLK(NULL,		"clk_imcop",		&clk_imcop),
 	CLK(NULL,		"clk_spare",		&clk_spare),
 	CLK("davinci_mmc.1",	NULL,			&clk_sdio1),
-	CLK(NULL,		"clk_usb1",		&clk_usb1),
-	CLK(NULL,		"clk_usbss",		&clk_usbss),
 	CLK(NULL,		"clk_ddr2_vrst",	&clk_ddr2_vrst),
 	CLK(NULL,		"clk_ddr2_vctl_rst",	&clk_ddr2_vctl_rst),
 	CLK(NULL,		NULL,			NULL),