From mboxrd@z Thu Jan 1 00:00:00 1970 From: Geert Uytterhoeven Date: Thu, 28 May 2015 18:53:38 +0000 Subject: [PATCH v2 13/14] clk: shmobile: mstp: Consider "zb_clk" suitable for power management Message-Id: <1432839219-475-14-git-send-email-geert+renesas@glider.be> List-Id: References: <1432839219-475-1-git-send-email-geert+renesas@glider.be> In-Reply-To: <1432839219-475-1-git-send-email-geert+renesas@glider.be> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-arm-kernel@lists.infradead.org Currently the CPG Clock Domain code looks for MSTP clocks to power manage a device. Unfortunately, on R-Mobile APE6 (r8a73a4) and SH-Mobile AG5 (sh73a0), the Bus State Controller (BSC) is not power-managed by an MSTP clock, but by a plain CPG clock (zb_clk). Add a special case to handle this, so the clock is properly managed, and devices connected to the BSC work as expected. Signed-off-by: Geert Uytterhoeven --- v2: - New. --- drivers/clk/shmobile/clk-mstp.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/clk/shmobile/clk-mstp.c b/drivers/clk/shmobile/clk-mstp.c index 619f3eccefd4884f..19e2b11953383587 100644 --- a/drivers/clk/shmobile/clk-mstp.c +++ b/drivers/clk/shmobile/clk-mstp.c @@ -258,6 +258,10 @@ int cpg_mstp_attach_dev(struct generic_pm_domain *domain, struct device *dev) "renesas,cpg-mstp-clocks")) goto found; + /* BSC on r8a73a4/sh73a0 uses zb_clk instead of an mstp clock*/ + if (!strcmp(clkspec.np->name, "zb_clk")) + goto found; + of_node_put(clkspec.np); i++; } -- 1.9.1