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[178.255.168.35]) by smtp.gmail.com with ESMTPSA id t2-v6sm405832wrr.7.2018.10.02.22.45.02 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Tue, 02 Oct 2018 22:45:02 -0700 (PDT) From: Michal Simek To: u-boot@lists.denx.de Date: Wed, 3 Oct 2018 07:45:01 +0200 Message-Id: <41abe8ae8caa57672660321ff54368ccc0927f3f.1538545499.git.michal.simek@xilinx.com> X-Mailer: git-send-email 1.9.1 Cc: Alexander Graf Subject: [U-Boot] [PATCH] serial: pl01x: Get clock from clock node if no clock property found X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.18 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" From: Siva Durga Prasad Paladugu This patch gets clock from clock nodes if no clock property found in serial node. Signed-off-by: Siva Durga Prasad Paladugu Signed-off-by: Michal Simek --- drivers/serial/serial_pl01x.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c index 2a5f256184f2..f4f33b13ff33 100644 --- a/drivers/serial/serial_pl01x.c +++ b/drivers/serial/serial_pl01x.c @@ -10,6 +10,7 @@ /* Simple U-Boot driver for the PrimeCell PL010/PL011 UARTs */ +#include #include #include #include @@ -341,6 +342,9 @@ int pl01x_serial_ofdata_to_platdata(struct udevice *dev) { struct pl01x_serial_platdata *plat = dev_get_platdata(dev); fdt_addr_t addr; + unsigned long clock; + int ret; + struct clk clk; addr = devfdt_get_addr(dev); if (addr == FDT_ADDR_T_NONE) @@ -348,6 +352,28 @@ int pl01x_serial_ofdata_to_platdata(struct udevice *dev) plat->base = addr; plat->clock = dev_read_u32_default(dev, "clock", 1); + if (plat->clock == 1) { + ret = clk_get_by_index(dev, 0, &clk); + if (ret < 0) { + dev_err(dev, "failed to get clock\n"); + return ret; + } + + clock = clk_get_rate(&clk); + if (IS_ERR_VALUE(clock)) { + dev_err(dev, "failed to get rate\n"); + return clock; + } + debug("%s: CLK %ld\n", __func__, clock); + + ret = clk_enable(&clk); + if (ret && ret != -ENOSYS) { + dev_err(dev, "failed to enable clock\n"); + return ret; + } + plat->clock = clock; + } + plat->type = dev_get_driver_data(dev); plat->skip_init = dev_read_bool(dev, "skip-init");