[PATCH v2] clk: aspeed: Mark lclk (LPC) and espiclk (eSPI) as critical

From: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
To: Joel Stanley <joel@jms.id.au>, Andrew Jeffery <andrew@aj.id.au>,
	Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>
Cc: Vijay Khemka <vijaykhemka@fb.com>,
	Samuel Jiang <chyishian.jiang@gmail.com>,
	linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-aspeed@lists.ozlabs.org, openbmc@lists.ozlabs.org,
	Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>,
	stable@vger.kernel.org
Subject: [PATCH v2] clk: aspeed: Mark lclk (LPC) and espiclk (eSPI) as critical
Date: Tue,  4 Dec 2018 10:50:53 -0800	[thread overview]
Message-ID: <20181204185054.24053-1-jae.hyun.yoo@linux.intel.com> (raw)

These interfaces are used by host to talk to BMC, and the clock
source is from the host, usually from PCH. So this commit marks
the lclk as critical to make it able to be enabled. Also, it marks
espiclk too because eSPI is sharing the same interface with LPC.

Fixes: 15ed8ce5f84e ("clk: aspeed: Register gated clocks")
Cc: stable@vger.kernel.org
Cc: Joel Stanley <joel@jms.id.au>
Cc: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
---
 drivers/clk/clk-aspeed.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/clk-aspeed.c b/drivers/clk/clk-aspeed.c
index 596136793fc4..df9504427246 100644
--- a/drivers/clk/clk-aspeed.c
+++ b/drivers/clk/clk-aspeed.c
@@ -95,7 +95,7 @@ static const struct aspeed_gate_data aspeed_gates[] = {
 	[ASPEED_CLK_GATE_DCLK] =	{  5, -1, "dclk-gate",		NULL,	CLK_IS_CRITICAL }, /* DAC */
 	[ASPEED_CLK_GATE_REFCLK] =	{  6, -1, "refclk-gate",	"clkin", CLK_IS_CRITICAL },
 	[ASPEED_CLK_GATE_USBPORT2CLK] =	{  7,  3, "usb-port2-gate",	NULL,	0 }, /* USB2.0 Host port 2 */
-	[ASPEED_CLK_GATE_LCLK] =	{  8,  5, "lclk-gate",		NULL,	0 }, /* LPC */
+	[ASPEED_CLK_GATE_LCLK] =	{  8,  5, "lclk-gate",		NULL,	CLK_IS_CRITICAL }, /* LPC clock from host. No parent dependency */
 	[ASPEED_CLK_GATE_USBUHCICLK] =	{  9, 15, "usb-uhci-gate",	NULL,	0 }, /* USB1.1 (requires port 2 enabled) */
 	[ASPEED_CLK_GATE_D1CLK] =	{ 10, 13, "d1clk-gate",		NULL,	0 }, /* GFX CRT */
 	[ASPEED_CLK_GATE_YCLK] =	{ 13,  4, "yclk-gate",		NULL,	0 }, /* HAC */
@@ -103,7 +103,7 @@ static const struct aspeed_gate_data aspeed_gates[] = {
 	[ASPEED_CLK_GATE_UART1CLK] =	{ 15, -1, "uart1clk-gate",	"uart",	0 }, /* UART1 */
 	[ASPEED_CLK_GATE_UART2CLK] =	{ 16, -1, "uart2clk-gate",	"uart",	0 }, /* UART2 */
 	[ASPEED_CLK_GATE_UART5CLK] =	{ 17, -1, "uart5clk-gate",	"uart",	0 }, /* UART5 */
-	[ASPEED_CLK_GATE_ESPICLK] =	{ 19, -1, "espiclk-gate",	NULL,	0 }, /* eSPI */
+	[ASPEED_CLK_GATE_ESPICLK] =	{ 19, -1, "espiclk-gate",	NULL,	CLK_IS_CRITICAL }, /* eSPI clock from host. No parent dependency */
 	[ASPEED_CLK_GATE_MAC1CLK] =	{ 20, 11, "mac1clk-gate",	"mac",	0 }, /* MAC1 */
 	[ASPEED_CLK_GATE_MAC2CLK] =	{ 21, 12, "mac2clk-gate",	"mac",	0 }, /* MAC2 */
 	[ASPEED_CLK_GATE_RSACLK] =	{ 24, -1, "rsaclk-gate",	NULL,	0 }, /* RSA */
-- 
2.7.4
