diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0606-i2c-bcm2835-Ensure-clock-exists-when-probing.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0606-i2c-bcm2835-Ensure-clock-exists-when-probing.patch | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0606-i2c-bcm2835-Ensure-clock-exists-when-probing.patch b/target/linux/bcm27xx/patches-4.19/950-0606-i2c-bcm2835-Ensure-clock-exists-when-probing.patch deleted file mode 100644 index 4a468f0291..0000000000 --- a/target/linux/bcm27xx/patches-4.19/950-0606-i2c-bcm2835-Ensure-clock-exists-when-probing.patch +++ /dev/null @@ -1,72 +0,0 @@ -From 1a5122f1756ef4fc5779324ad26b6a04142166b5 Mon Sep 17 00:00:00 2001 -From: Annaliese McDermond <nh6z@nh6z.net> -Date: Fri, 21 Jun 2019 03:52:50 -0700 -Subject: [PATCH] i2c: bcm2835: Ensure clock exists when probing - -Commit 9de93b04df16b055824e3f1f13fedb90fbcf2e4f upstream. - -Probe function fails to recognize that upstream clock actually -doesn't yet exist because clock driver has not been initialized. -Actually try to go get the clock and test for its existence -before trying to set up a downstream clock based upon it. - -This fixes a bug that causes the i2c driver not to work with -monolithic kernels. - -Fixes: bebff81fb8b9 ("i2c: bcm2835: Model Divider in CCF") -Signed-off-by: Annaliese McDermond <nh6z@nh6z.net> -Acked-by: Stefan Wahren <wahrenst@gmx.net> -Signed-off-by: Wolfram Sang <wsa@the-dreams.de> ---- - drivers/i2c/busses/i2c-bcm2835.c | 16 ++++++++++++---- - 1 file changed, 12 insertions(+), 4 deletions(-) - ---- a/drivers/i2c/busses/i2c-bcm2835.c -+++ b/drivers/i2c/busses/i2c-bcm2835.c -@@ -244,15 +244,18 @@ static const struct clk_ops clk_bcm2835_ - }; - - static struct clk *bcm2835_i2c_register_div(struct device *dev, -- const char *mclk_name, -+ struct clk *mclk, - struct bcm2835_i2c_dev *i2c_dev) - { - struct clk_init_data init; - struct clk_bcm2835_i2c *priv; - char name[32]; -+ const char *mclk_name; - - snprintf(name, sizeof(name), "%s_div", dev_name(dev)); - -+ mclk_name = __clk_get_name(mclk); -+ - init.ops = &clk_bcm2835_i2c_ops; - init.name = name; - init.parent_names = (const char* []) { mclk_name }; -@@ -505,8 +508,8 @@ static int bcm2835_i2c_probe(struct plat - struct resource *mem, *irq; - int ret; - struct i2c_adapter *adap; -- const char *mclk_name; - struct clk *bus_clk; -+ struct clk *mclk; - u32 bus_clk_rate; - - i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL); -@@ -521,9 +524,14 @@ static int bcm2835_i2c_probe(struct plat - if (IS_ERR(i2c_dev->regs)) - return PTR_ERR(i2c_dev->regs); - -- mclk_name = of_clk_get_parent_name(pdev->dev.of_node, 0); -+ mclk = devm_clk_get(&pdev->dev, NULL); -+ if (IS_ERR(mclk)) { -+ if (PTR_ERR(mclk) != -EPROBE_DEFER) -+ dev_err(&pdev->dev, "Could not get clock\n"); -+ return PTR_ERR(mclk); -+ } - -- bus_clk = bcm2835_i2c_register_div(&pdev->dev, mclk_name, i2c_dev); -+ bus_clk = bcm2835_i2c_register_div(&pdev->dev, mclk, i2c_dev); - - if (IS_ERR(bus_clk)) { - dev_err(&pdev->dev, "Could not register clock\n"); |