From mboxrd@z Thu Jan 1 00:00:00 1970 From: Magnus Damm Date: Sat, 29 Aug 2015 09:14:18 +0000 Subject: [PATCH v4 05/05] clk: shmobile: Make MSTP clock-output-names optional Message-Id: <20150829091418.28546.8569.sendpatchset@little-apple> List-Id: References: <20150829091323.28546.28287.sendpatchset@little-apple> In-Reply-To: <20150829091323.28546.28287.sendpatchset@little-apple> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-clk@vger.kernel.org Cc: kuninori.morimoto.gx@renesas.com, linux-sh@vger.kernel.org, mturquette@baylibre.com, gaku.inami.xw@bp.renesas.com, sboyd@codeaurora.org, horms@verge.net.au, geert@linux-m68k.org, laurent.pinchart@ideasonboard.com, Magnus Damm From: Magnus Damm This patch updates the MSTP driver to make the "clock-output-names" DT property optional instead of mandatory. In case the DT property is omitted then the function clk_register_clkdev() is skipped. The default for new SoCs is to not use "clock-output-names". Signed-off-by: Magnus Damm --- Changes since V3: - Added support for multiple MSTP bits. =) drivers/clk/shmobile/clk-mstp.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) --- 0001/drivers/clk/shmobile/clk-mstp.c +++ work/drivers/clk/shmobile/clk-mstp.c 2015-08-29 18:01:00.662366518 +0900 @@ -199,26 +199,29 @@ static void __init cpg_mstp_clocks_init( for (i = 0; i < MSTP_MAX_CLOCKS; ++i) { const char *parent_name; const char *name; + bool allocated_name; u32 clkidx; int ret; - /* Skip clocks with no name. */ - ret = of_property_read_string_index(np, "clock-output-names", - i, &name); - if (ret < 0 || strlen(name) = 0) - continue; - parent_name = of_clk_get_parent_name(np, i); ret = of_property_read_u32_index(np, idxname, i, &clkidx); if (parent_name = NULL || ret < 0) break; if (clkidx >= MSTP_MAX_CLOCKS) { - pr_err("%s: invalid clock %s %s index %u)\n", - __func__, np->name, name, clkidx); + pr_err("%s: invalid clock %s index %u)\n", + __func__, np->name, clkidx); continue; } + if (of_property_read_string_index(np, "clock-output-names", + i, &name) = 0) { + allocated_name = false; + } else { + name = kasprintf(GFP_KERNEL, "%s.%u", np->name, clkidx); + allocated_name = true; + } + clks[clkidx] = cpg_mstp_clock_register(name, parent_name, clkidx, group); if (!IS_ERR(clks[clkidx])) { @@ -231,12 +234,19 @@ static void __init cpg_mstp_clocks_init( * * FIXME: Remove this when all devices that require a * clock will be instantiated from DT. + * + * We currently register clkdev only when the DT + * property clock-output-names is present. */ - clk_register_clkdev(clks[clkidx], name, NULL); + if (!allocated_name) + clk_register_clkdev(clks[clkidx], name, NULL); } else { pr_err("%s: failed to register %s %s clock (%ld)\n", __func__, np->name, name, PTR_ERR(clks[clkidx])); } + + if (allocated_name) + kfree(name); } of_clk_add_provider(np, of_clk_src_onecell_get, &group->data);